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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

May 11, 2026

Date of Report (Date of earliest event reported)

TELOS CORPORATION

(Exact name of registrant as specified in its charter)

Maryland001-0844352-0880974

(State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification No.)

19886 Ashburn Road,

Ashburn, Virginia 20147-2358

(Address of principal executive offices)(Zip Code)

(703) 724-3800

(Registrant’s telephone number, including area code)

NOT APPLICABLE

(Former name, former address, and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbolName of each exchange on which registered

Common stock, $0.001 par value per shareTLSThe Nasdaq Stock Market LLC

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 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§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.  ☐

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Item 2.02.    Results of Operations and Financial Condition.

On Monday, May 11, 2026, Telos Corporation (the “Company”) issued a press release announcing a conference call to discuss its financial results for the first quarter ended March 31, 2026, and posted those financial results on its website. A copy of the press release and financial results for the first quarter ended March 31, 2026 are attached as Exhibit 99.1 and Exhibit 99.2 to this Current Report on Form 8-K and incorporated herein by reference.

The Company will conduct a conference call to discuss its financial results on Monday, May 11, 2026, at 9:30 a.m., Eastern Time. A live broadcast of the conference call along with a supplemental presentation will be available to the public through links on the Investor Relations section of the Company’s website (https://investors.telos.com).

The information in this Current Report on Form 8-K, including Exhibit 99.1 and Exhibit 99.2 attached hereto, is furnished pursuant to Item 2.02 of this Current Report on Form 8-K. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, except as shall be expressly set forth by specific reference in such filing.

Item 9.01.    Financial Statements and Exhibits.

99.1

Press Release, issued May 11, 2026

99.2

First Quarter 2026 Financial Results

104Inline XBRL for the cover page of this Current Report on Form 8-K.

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S I G N A T U R E S

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.

TELOS CORPORATION

By:/s/ Mark Bendza

Mark Bendza

Chief Financial Officer

Date: May 11, 2026

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tls-20260428

0000320121false00003201212026-04-282026-04-28

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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

April 28, 2026

Date of Report (Date of earliest event reported)

TELOS CORPORATION

(Exact name of registrant as specified in its charter)

Maryland001-0844352-0880974

(State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification No.)

19886 Ashburn Road,

Ashburn, Virginia 20147-2358

(Address of principal executive offices)(Zip Code)

(703) 724-3800

(Registrant’s telephone number, including area code)

NOT APPLICABLE

(Former name, former address, and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbolName of each exchange on which registered

Common stock, $0.001 par value per shareTLSThe Nasdaq Stock Market LLC

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 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§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.  ☐

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Item 5.02.    Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Telos Corporation (the “Company”) has announced that John B. Wood, the Company’s President, Chief Executive Officer and Chairman of the Board, is taking a medical leave of absence. The duration of the leave is uncertain at this time.

Effective April 28, 2026, Mark Griffin, Executive Vice President, Security Solutions, Mark Bendza, Executive Vice President and Chief Financial Officer, and Hutch Robbins, Executive Vice President and General Counsel, under the oversight of and reporting to the Company’s Board of Directors, have assumed the responsibilities of the Chief Executive Officer on an interim basis. Fred Schaufeld has been appointed by the Board of Directors to serve as its Chairman on an interim basis effective immediately. The Board of Directors and executive leadership team are working closely to ensure continuity of the Company’s operations during Mr. Wood’s absence. The Company does not anticipate material disruption to its operations.

Item 2.02.    Results of Operations and Financial Condition.

The Company expects to report first-quarter revenue and Adjusted EBITDA above the high end of the guidance range it provided on March 16, 2026 and to reaffirm its full-year outlook during its upcoming May 11, 2026 earnings call.

The information in this Item 2.02 is being furnished and shall not be deemed "filed" for 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, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended (the "Securities Act"), or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Forward-Looking Statements

This Form 8-K contains forward-looking statements which are made under the safe harbor provisions of the federal securities laws. These statements are based on the Company’s management’s current beliefs, expectations and assumptions about future events, conditions and results and on information currently available to them. By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that may or may not occur in the future. The Company believes that these risks and uncertainties include, but are not limited to, those described under the captions “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” set forth from time to time in the Company’s filings and reports with the U.S. Securities and Exchange Commission (SEC), including its Annual Report on Form 10-K for the year ended December 31, 2025, as well as subsequent and future filings and reports by the Company, copi

tls-202603160000320121false00003201212026-03-162026-03-16

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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 March 16, 2026 Date of Report (Date of earliest event reported)

TELOS CORPORATION

(Exact name of registrant as specified in its charter)

Maryland001-0844352-0880974 (State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification No.)

19886 Ashburn Road,

Ashburn, Virginia 20147-2358 (Address of principal executive offices)(Zip Code)

(703) 724-3800

(Registrant’s telephone number, including area code)

NOT APPLICABLE

(Former name, former address, and former fiscal year, if changed since last report) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbolName of each exchange on which registered Common stock, $0.001 par value per shareTLSThe Nasdaq Stock Market LLC

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 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§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.  ☐

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Item 2.02.    Results of Operations and Financial Condition. On Monday, March 16, 2026, Telos Corporation (the “Company”) issued a press release announcing a conference call to discuss its financial results for the fourth quarter and year ended December 31, 2025, and posted those financial results on its website. A copy of the press release and financial results for the fourth quarter and year ended December 31, 2025 are attached as Exhibit 99.1 and Exhibit 99.2 to this Current Report on Form 8-K and incorporated herein by reference. The Company will conduct a conference call to discuss its financial results on Monday, March 16, 2026, at 9:30 a.m., Eastern Time. A live broadcast of the conference call along with a supplemental presentation will be available to the public through links on the Investor Relations section of the Company’s website (https://investors.telos.com). The information in this Current Report on Form 8-K, including Exhibit 99.1 and Exhibit 99.2 attached hereto, is furnished pursuant to Item 2.02 of this Current Report on Form 8-K. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, except as shall be expressly set forth by specific reference in such filing.

Item 9.01.    Financial Statements and Exhibits.

99.1 Press Release, issued March 16, 2026

99.2 Fourth Quarter and Year Ended December 31, 2025 Financial Results

104Inline XBRL for the cover page of this Current Report on Form 8-K.

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S I G N A T U R E S

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.

TELOS CORPORATION

By:/s/ Mark Bendza Mark Bendza Chief Financial Officer

Date: March 16, 2026 .