AI Earnings Predictions for Sterling Infrastructure Inc. (STRL)

EX-99.1

2 a20260803ex991earningsrele.htm

EX-99.1

Document

Exhibit 99.1

NEWS RELEASE

For Immediate Release:

August 3, 2026

Sterling Reports Record Second Quarter Results and Raises Full Year 2026 Guidance

THE WOODLANDS, TX – August 3, 2026 – Sterling Infrastructure, Inc. (NasdaqGS: STRL) (“Sterling” or the “Company”) today announced strong financial results for the second quarter of 2026.

The financial comparisons herein are to the prior year quarter, unless otherwise noted.

Second Quarter 2026

Results:

•Revenues of $1.17 billion increased by 90%. Acquisitions(1) contributed $250.8 million of revenue in the quarter.

•Net income of $155.8 million, or $5.00 per diluted share, increases of 120% and 116% respectively.

•EBITDA(2) of $233.6 million, an increase of 101%.

Adjusted Results:

•Adjusted net income(2) of $180.8 million, or $5.80 per diluted share, increases of 118% and 116%, respectively.

•Adjusted EBITDA(2) of $256.7 million, an increase of 104%.

Additional Financial Metrics:

•Cash flows from operations totaled $328.0 million for the six months ended June 30, 2026.

•Cash and cash equivalents totaled $464.5 million at June 30, 2026.

•Backlog at June 30, 2026 was $4.33 billion, up 116% from the prior year period. Backlog increased 50% year-over-year on an organic basis.

•Combined Backlog(3) at June 30, 2026 was $5.62 billion, up 150% from the prior year period. Combined backlog increased 36% year-over-year on an organic basis.

•Second quarter 2026 book-to-burn ratios were 1.4x for Backlog and 1.3x for Combined Backlog, exclusive of the impact of the Stone Ridge acquisition.

CEO Remarks and Outlook

“We delivered an outstanding second quarter, with adjusted net income increasing 118% to deliver adjusted diluted EPS of $5.80. Revenue grew 90%, including organic growth of approximately 50%, and strong adjusted EBITDA margins of 22%. Year-to-date operating cash flow generation totaled $328 million,” stated Joe Cutillo, Sterling’s Chief Executive Officer. “These results are a testament to the outstanding execution of our teams across the organization, and we are incredibly proud of their continued performance.”

“Demand across our end markets remains strong, as reflected in robust bidding and award activity during the quarter and continued expansion of our multi-year visibility. We ended the quarter with signed backlog of $4.3 billion, up 116%, and combined backlog of $5.6 billion, up 150%. In addition, our pipeline of high-probability future phase work continues to

(1) Acquisitions includes CEC and Stone Ridge.

(2) See “Non-GAAP Measures”, “Adjusted Net Income Reconciliation”, and “EBITDA Reconciliation” sections below for more information.

(3) Combined Backlog includes Unsigned Awards of $1.28 billion at June 30, 2026, with $1.24 billion of Unsigned Awards contributed from CEC and Stone Ridge.

expand and now exceeds $1.4 billion. Collectively, our signed backlog, unsigned awards, and future phase opportunities provide visibility into a total addressable pool of work of more than $7.0 billion, an increase of more than $2.5 billion since year-end 2025.”

Mr. Cutillo continued, “Looking more closely at our segment performance, E-Infrastructure Solutions delivered another outstanding quarter, with revenue increasing 192% and adjusted operating income growing 148%. These results were driven by strong performance across both organic and acquired operations. The legacy site development business generated 111% revenue growth, reflecting significant growth across all regions, and operating margins expanded both year-over-year and sequentially. Demand for CEC’s electrical services also remained exceptionally strong, with revenue increasing 140% compared to the pre-acquisition second quarter and margins improving on both a year-over-year and sequential basis.

E-Infrastructure signed backlog increased 165% over the prior year quarter. Mission-critical projects—including data centers, manufacturing, and semiconductor facilities—represented 92% of E-Infrastructure backlog at quarter end. We continue to see significant opportunities for both Sterling’s best-in-class site development services and CEC’s mission-critical electrical services, reinforcing our confidence in the multi-year growth trajectory of this business.

In Transportation Solutions, revenue declined 20% compared to the prior year period, while adjusted operating income increased 8%. The revenue decline reflects our ongoing reallocation of resources from transportation projects to higher-margin E-Infrastructure opportunities; this shift is now taking place at an accelerated pace.

In Building Solutions, revenue declined 1%, reflecting relatively flat levels of homebuilder activity, while adjusted operating income decreased 11%. We expect market conditions to remain challenging through 2026 as housing affordability pressures continue to affect prospective homebuyers, but remain optimistic on the long-term growth opportunities in ou

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strl-20260225FALSE000087423800008742382026-02-252026-02-25

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 25, 2026

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02     Results of Operations and Financial Condition.

On February 25, 2026, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and twelve months ended December 31, 2025 and providing full year 2026 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01     Regulation FD Disclosure.

On February 26, 2026, the Company will host a conference call to discuss the fourth quarter and full year 2025 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits. (d)    Exhibits

Exhibit Number Description 99.1Press release, dated February 25, 2026

99.2Presentation slides, dated February 26, 2026

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:February 25, 2026 By:/s/ Nicholas Grindstaff Nicholas Grindstaff Chief Financial Officer

strl-20251103FALSE000087423800008742382025-11-032025-11-03

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 3, 2025

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02     Results of Operations and Financial Condition.

On November 3, 2025, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and nine months ended September 30, 2025 and providing updated full year 2025 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01     Regulation FD Disclosure.

On November 4, 2025, the Company will host a conference call to discuss the third quarter 2025 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits. (d)    Exhibits

Exhibit Number Description 99.1Press release, dated November 3, 2025

99.2Presentation slides, dated November 4, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:November 3, 2025 By:/s/ Nicholas Grindstaff Nicholas Grindstaff Chief Financial Officer

strl-20250804FALSE000087423800008742382025-08-042025-08-04

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 4, 2025

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02     Results of Operations and Financial Condition.

On August 4, 2025, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and six months ended June 30, 2025 and providing updated full year 2025 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01     Regulation FD Disclosure.

On August 5, 2025, the Company will host a conference call to discuss the second quarter 2025 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits. (d)    Exhibits

Exhibit Number Description 99.1Press release, dated August 4, 2025

99.2Presentation slides, dated August 5, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:August 4, 2025 By:/s/ Nicholas Grindstaff Nicholas Grindstaff Chief Financial Officer

strl-20250505FALSE000087423800008742382025-05-052025-05-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 5, 2025

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02     Results of Operations and Financial Condition.

On May 5, 2025, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three months ended March 31, 2025 and providing updated full year 2025 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01     Regulation FD Disclosure.

On May 6, 2025, the Company will host a conference call to discuss the first quarter 2025 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits. (d)    Exhibits

Exhibit Number Description 99.1Press release, dated May 5, 2025

99.2Presentation slides, dated May 6, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:May 5, 2025By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20250225FALSE000087423800008742382025-02-252025-02-25

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 25, 2025

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02     Results of Operations and Financial Condition.

On February 25, 2025, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and twelve months ended December 31, 2024 and providing full year 2025 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01     Regulation FD Disclosure.

On February 26, 2025, the Company will host a conference call to discuss the fourth quarter and full year 2024 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits. (d)    Exhibits

Exhibit Number Description 99.1Press release, dated February 25, 2025

99.2Presentation slides, dated February 26, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:February 25, 2025By:/s/ Sharon R. Villaverde Sharon R. Villaverde Chief Financial Officer

strl-20241106FALSE000087423800008742382024-11-062024-11-06

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 6, 2024

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02     Results of Operations and Financial Condition.

On November 6, 2024, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and nine months ended September 30, 2024 and providing an update on full year 2024 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01     Regulation FD Disclosure.

On November 7, 2024, the Company will host a conference call to discuss the third quarter 2024 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits. (d)    Exhibits

Exhibit Number Description 99.1Press release, dated November 6, 2024

99.2Presentation slides, dated November 7, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:November 6, 2024By:/s/ Sharon R. Villaverde Sharon R. Villaverde Chief Financial Officer

strl-20240805FALSE000087423800008742382024-08-052024-08-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 5, 2024

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02     Results of Operations and Financial Condition.

On August 5, 2024, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and six months ended June 30, 2024 and providing an update on full year 2024 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01     Regulation FD Disclosure.

On August 6, 2024, the Company will host a conference call to discuss the second quarter 2024 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits. (d)    Exhibits

Exhibit Number Description 99.1Press release, dated August 5, 2024

99.2Presentation slides, dated August 6, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:August 5, 2024By:/s/ Sharon R. Villaverde Sharon R. Villaverde Chief Financial Officer

strl-20240506FALSE000087423800008742382024-05-062024-05-06

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 6, 2024

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02     Results of Operations and Financial Condition.

On May 6, 2024, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three months ended March 31, 2024 and providing an update on full year 2024 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01     Regulation FD Disclosure.

On May 7, 2024, the Company will host a conference call to discuss the first quarter 2024 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits. (d)    Exhibits

Exhibit Number Description 99.1Press release, dated May 6, 2024

99.2Presentation slides, dated May 7, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:May 6, 2024By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20240226FALSE000087423800008742382024-02-262024-02-26

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 26, 2024

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02     Results of Operations and Financial Condition.

On February 26, 2024, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and twelve months ended December 31, 2023 and providing full year 2024 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01     Regulation FD Disclosure.

On February 27, 2024, the Company will host a conference call to discuss the fourth quarter and full year 2023 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits. (d)    Exhibits

Exhibit Number Description 99.1Press release, dated February 26, 2024

99.2Presentation slides, dated February 27, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:February 26, 2024By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20231106FALSE000087423800008742382023-11-062023-11-06

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 6, 2023

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operations and Financial Condition.

On November 6, 2023, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and nine months ended September 30, 2023 and an update to the full year 2023 guidance. The press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01Regulation FD Disclosure.

On November 7, 2023, the Company will host a conference call to discuss the third quarter results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the Company specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits.

(d)    Exhibits

Exhibit Number Description 99.1Press release, dated November 6, 2023

99.2Presentation slides, dated November 7, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:November 6, 2023By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20230807FALSE000087423800008742382023-08-072023-08-07

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 7, 2023

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operations and Financial Condition.

On August 7, 2023, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and six months ended June 30, 2023 and an update to the full year 2023 guidance. The copy of the press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01Regulation FD Disclosure.

On August 8, 2023, the Company will host a conference call to discuss the second quarter results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits.

(d)    Exhibits

Exhibit Number Description 99.1Press release, dated August 7, 2023

99.2Presentation slides, dated August 8, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:August 7, 2023By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20230501FALSE000087423800008742382023-05-012023-05-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 1, 2023

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operations and Financial Condition.

On May 1, 2023, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three months ended March 31, 2023 and reaffirmed the full year 2023 guidance. The copy of the press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01Regulation FD Disclosure.

On May 2, 2023, the Company will host a conference call to discuss the first quarter results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits.

(d)    Exhibits

Exhibit Number Description 99.1Press release, dated May 1, 2023

99.2Presentation slides, dated May 2, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:May 1, 2023By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20230227FALSE000087423800008742382023-02-272023-02-27

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 27, 2023

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operations and Financial Condition.

On February 27, 2023, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and twelve months ended December 31, 2022 and provided full year 2023 guidance. The copy of the press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01Regulation FD Disclosure.

On February 28, 2023, the Company will host a conference call to discuss the fourth quarter and full year 2022 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits.

(d)    Exhibits

Exhibit Number Description 99.1Press release, dated February 27, 2023

99.2Presentation slides, dated February 28, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:February 27, 2023 By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20221031FALSE000087423800008742382022-10-312022-10-31

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 31, 2022

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operations and Financial Condition.

On October 31, 2022, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and nine months ended September 30, 2022 and an update on full year 2022 guidance. The copy of the press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01Regulation FD Disclosure.

On November 1, 2022, the Company will host a conference call to discuss the third quarter 2022 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits.

(d)    Exhibits

Exhibit Number Description 99.1Press release, dated October 31, 2022

99.2Presentation slides, dated November 1, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:October 31, 2022 By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20220801FALSE000087423800008742382022-08-012022-08-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 1, 2022

STERLING INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Sterling Construction Company, Inc. (Former name, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operations and Financial Condition.

On August 1, 2022, Sterling Infrastructure, Inc. (the “Company”) issued a press release announcing financial results for the three and six months ended June 30, 2022 and an update on full year 2022 guidance. The copy of the press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01Regulation FD Disclosure.

On August 2, 2022, the Company will host a conference call to discuss the second quarter 2022 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits.

(d)    Exhibits

Exhibit Number Description 99.1Press release, dated August 1, 2022

99.2Presentation slides, dated August 2, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING INFRASTRUCTURE, INC.

Date:August 1, 2022By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20220502FALSE000087423800008742382022-05-022022-05-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 2, 2022

STERLING CONSTRUCTION COMPANY, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operations and Financial Condition.

On May 2, 2022, Sterling Construction Company, Inc. (the “Company”) issued a press release announcing financial results for the three months ended March 31, 2022. The copy of the press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01Regulation FD Disclosure.

On May 3, 2022, the Company will host a conference call to discuss the first quarter 2022 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits.

(d)    Exhibits

Exhibit Number Description 99.1Press release, dated May 2, 2022

99.2Presentation slides, dated May 3, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING CONSTRUCTION COMPANY, INC.

Date:May 2, 2022By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20220228FALSE000087423800008742382022-02-282022-02-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 28, 2022

STERLING CONSTRUCTION COMPANY, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operations and Financial Condition.

On February 28, 2022, Sterling Construction Company, Inc. (the “Company”) issued a press release announcing financial results for the three and twelve months ended December 31, 2021. The copy of the press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01Regulation FD Disclosure.

On March 1, 2022, the Company will host a conference call to discuss the fourth quarter and full year 2021 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits.

(d)    Exhibits

Exhibit Number Description 99.1Press release, dated February 28, 2022

99.2Presentation slides, dated March 1, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING CONSTRUCTION COMPANY, INC.

Date:February 28, 2022By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer

strl-20211102FALSE000087423800008742382021-11-022021-11-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 2, 2021

STERLING CONSTRUCTION COMPANY, INC.

(Exact name of registrant as specified in its charter)

Delaware001-3199325-1655321 (State or other jurisdiction of incorporation or organization)(Commission File Number)(I.R.S. Employer Identification No.)

1800 Hughes Landing Blvd. The Woodlands, Texas

77380

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code:  (281) 214-0777

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.01 par value per shareSTRLThe NASDAQ Stock Market LLC (Title of Class)(Trading Symbol)(Name of each exchange on which registered)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 2.02Results of Operations and Financial Condition.

On November 2, 2021, Sterling Construction Company, Inc. (the “Company”) issued a press release announcing financial results for the nine months ended September 30, 2021. The copy of the press release is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information provided in this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 7.01Regulation FD Disclosure.

On November 3, 2021, the Company will host a conference call to discuss the third quarter 2021 results as well as corporate developments. The slides to be used during the conference call are being furnished with this Current Report on Form 8-K as Exhibit 99.2 and are incorporated herein by reference.

The information provided in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, unless the registrant specifically states that the information is to be considered “filed” under the Exchange Act, nor shall it be incorporated by reference in any filing made by the Company pursuant to the Exchange Act or the Securities Act, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.

Item 9.01     Financial Statements and Exhibits.

(d)    Exhibits

Exhibit Number Description 99.1Press release, dated November 2, 2021

99.2Presentation slides, dated November 3, 2021

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

STERLING CONSTRUCTION COMPANY, INC.

Date:November 2, 2021By:/s/ Ronald A. Ballschmiede Ronald A. Ballschmiede Chief Financial Officer