ECVT

EX-99.1

2 ex991-ecvt3q26earningsrele.htm

EX-99.1

Document

Exhibit 99.1

Ecovyst Reports Third Quarter 2026 Results and Raises 2026 Outlook

WAYNE, PA, November 5, 2026 -- Ecovyst Inc. (NYSE: ECVT) (“Ecovyst” or the “Company”), a leading provider of regenerated sulfuric acid, virgin sulfuric acid, and sulfur dioxide and related derivatives, today reported results for the third quarter ended September 30, 2026.

On December 31, 2025, the Company completed the sale of its Advanced Materials & Catalysts business, which included the Company’s investment in affiliated companies, Zeolyst International and Zeolyst C.V. Financial results of the divested Advanced Materials & Catalysts business are reported in discontinued operations in the financial statements for all periods presented.

Reported results for the third quarter of 2026 included the Calabrian sulfur dioxide and related derivatives business acquired on June 30, 2026.

Third Quarter 2026 Results & Highlights from Continuing Operations

•Sales grew 51% to $308.6 million, an increase of $103.7 million, from $204.9 million in the third quarter of 2025

•Net income of $18.4 million, compared to $0.2 million in the year-ago quarter, with a net income margin of 6.0% and diluted net income per share of $0.17

•Adjusted Net Income1 was $25.3 million, compared to $21.5 million in the year-ago quarter, with Adjusted Diluted Income per share of $0.23

•Adjusted EBITDA1 of $61.2 million, an increase of $3.7 million, or 6% compared to $57.5 million in the third quarter of 2025

•Cash flow from operating activities was $80.7 million for the nine months ended September 30, 2026, compared to $77.0 million for the nine months ended September 30, 2025. Adjusted Free Cash Flow1 was $32.4 million for the nine months ended September 30, 2026, compared to $42.4 million for the nine months ended September 30, 2025

1 Refer to the Presentation of Non-GAAP Financial Measures section below for additional information.

“Ecovyst delivered another strong quarter, with third quarter 2026 Adjusted EBITDA of $61 million, up over 6% compared to the year-ago quarter, and above the high end of our guidance range,” said Kurt J. Bitting, Ecovyst’s Chief Executive Officer. “Strong refining margins and increased export demand drove year-over-year growth in regenerated sulfuric acid volumes and sales. Virgin sulfuric acid sales also increased, benefiting from solid mining demand, stable demand across industrial applications and positive pricing fundamentals. These results also reflect our first full quarter of owning Calabrian, which we acquired on June 30, 2026. Calabrian’s third quarter performance was consistent with our investment thesis, integration is underway, and we remain on track to capture anticipated synergies,” added Bitting.

“Given current refining economics, we anticipate high refinery utilization through year-end and we expect demand across our portfolio to remain healthy for the rest of the year. We are again raising our full-year Adjusted EBITDA guidance to a range of $208 million to $212 million, reflecting strong momentum through the first nine months of the year and the shift of a turnaround from the fourth quarter into early 2027,” Bitting said. “We remain flexible in how we allocate capital while prioritizing stockholder value. This includes pursuing organic and inorganic growth opportunities and returning capital to stockholders through share repurchases. We repurchased $2.7 million of our common stock in the third quarter and intend to repurchase up to a total of $20 million in the second half of 2026,” Bitting added.

Ecovyst Third Quarter 2026 Earnings Release Page 1

Review of Business Results

Third quarter 2026 sales were $308.6 million, up $103.7 million or 51%, compared to $204.9 million in the third quarter of 2025. The increase in sales reflects higher sales volume and pricing compared to the prior year quarter, as well as the results for the Calabrian business acquired June 30, 2026. Average selling prices were higher primarily due to the pass-through effect of higher sulfur costs of approximately $67 million and favorable contractual pricing for regenerated sulfuric acid. The increase in sales volume was driven by higher sales of regenerated sulfuric acid from strong demand and less customer downtime, along with the contribution of sales volume from the Calabrian business, compared to the prior year quarter. Third quarter 2026 Adjusted EBITDA was $61.2 million, up $3.7 million or 6%, compared to $57.5 million in the third quarter of 2025, with the increase primarily driven by higher sales volume and favorable net pricing, partially offset by higher manufacturing costs, general inflation and higher transportation costs.

Cash Flows and Balance Sheet

Cash flows from operating activities for continuing operations were $80.7 million for the nine months ended September 30, 2026, compared to $77.0 million for the nine months ended September 30, 2025. The incr

EX-99.1

2 ex991-ecvt2q26earningsrele.htm

EX-99.1

Document

Exhibit 99.1

Ecovyst Reports Second Quarter 2026 Results and Raises 2026 Outlook

WAYNE, PA, August 5, 2026 -- Ecovyst Inc. (NYSE: ECVT) (“Ecovyst” or the “Company”), a leading provider of regenerated sulfuric acid, virgin sulfuric acid, and sulfur dioxide and related derivatives, today reported results for the second quarter ended June 30, 2026.

On December 31, 2025, the Company completed the sale of its Advanced Materials & Catalysts business, which includes the Company’s investment in affiliated companies, Zeolyst International and Zeolyst C.V. Financial results of the divested Advanced Materials & Catalysts business are reported in discontinued operations in the financial statements for all periods presented.

Second Quarter 2026 Results & Highlights from Continuing Operations

•Sales grew 42% to $250.0 million, an increase of $73.9 million, from $176.1 million in the second quarter of 2025

•Net income of $10.7 million, compared to $5.0 million in the year-ago quarter, with a net income margin of 4.3% and diluted net income per share of $0.10

•Adjusted Net Income was $23.4 million, compared to $11.4 million in the year-ago quarter, with Adjusted Diluted Income per share of $0.21

•Adjusted EBITDA grew 27% to $53.1 million, an increase of $11.2 million from $41.9 million in the second quarter of 2025

•Cash flow from operating activities was $55.2 million for the six months ended June 30, 2026, compared to $25.3 million for the six months ended June 30, 2025. Adjusted Free Cash Flow was $12.8 million for the six months ended June 30, 2026, compared to $(2.4) million for the six months ended June 30, 2025

•Completed the strategic acquisition of the Calabrian sulfur dioxide and related derivatives business from INEOS Enterprises on June 30, 2026

“In the second quarter of 2026 Ecovyst continued to deliver on its financial and long-term strategic objectives. As anticipated, high refinery utilization and positive alkylate economics contributed to increased volume of regenerated sulfuric acid, while virgin sulfuric acid volume increased double digits, reflecting positive demand fundamentals and the contribution from the Waggaman sulfuric acid plant we acquired in May 2025. As a result, we delivered second quarter 2026 Adjusted EBITDA of $53 million, within our guidance range, and up 27% compared to the year ago quarter,” said Kurt J. Bitting, Ecovyst’s Chief Executive Officer.

“We remain focused on creating long-term stockholder value by delivering differentiated growth by capitalizing on favorable trends in our end-use segments and pursuing synergistic acquisitions that expand our ability to serve those attractive industries,” said Bitting. “In Q2 2026, we completed our acquisition of the Calabrian sulfur dioxide and related derivatives business. This transaction broadens Ecovyst’s platform of leading sulfur-based solutions, expands our presence in core applications such as mining and water treatment, and provides us with attractive growth opportunities in adjacent industry applications such as food processing and pharmaceuticals. As we begin the integration of Calabrian into Ecovyst, we expect to realize meaningful synergies that we believe will create additional value for our stockholders,” said Bitting. “Based upon our favorable results for the first six months of the year, and to reflect the anticipated financial contribution of Calabrian in the second half of the year, we are raising our guidance for full-year Adjusted EBITDA to a range of $195 million to $207 million,” added Bitting.

Ecovyst Second Quarter 2026 Earnings Release Page 1

Review of Business Results

Second quarter 2026 sales were $250.0 million, up $73.9 million or 42%, compared to $176.1 million in the second quarter of 2025. The increase in sales reflects higher sales volume and pricing compared to the prior year quarter. Average selling prices were higher primarily due to the pass-through effect of higher sulfur costs of approximately $55 million and favorable contractual pricing for regenerated sulfuric acid. The increase in sales volume was driven by higher sales of regenerated sulfuric acid from strong demand and less customer downtime, along with higher sales of virgin sulfuric acid due to increased customer demand and the contribution of sales volume from the Waggaman location, compared to the prior year quarter. Second quarter 2026 Adjusted EBITDA was $53.1 million, up $11.2 million or 27%, compared to $41.9 million in the second quarter of 2025, with the increase primarily driven by higher sales volume and favorable net pricing, partially offset by higher manufacturing costs, general inflation and higher transportation costs.

Cash Flows and Balance Sheet

Cash flows from operating activities for continuing operations were $55.2 million for the six months ended June 30, 2026, compared to $25.3 million for the six months ended June 30, 2025. The increase wa

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ecvt-202602260001708035false00017080352026-02-262026-02-26

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, 2026

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

600 Lee Road, Suite 200 Wayne, Pennsylvania 19087 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On February 26, 2026, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter and year ended December 31, 2025. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter and year ended December 31, 2025

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:February 26, 2026 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202511040001708035false00017080352025-11-042025-11-04

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): November 4, 2025

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

600 Lee Road, Suite 200 Wayne, Pennsylvania 19087 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On November 4, 2025, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended September 30, 2025. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended September 30, 2025

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:November 4, 2025 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202508070001708035false00017080352025-08-072025-08-07

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, 2025

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

600 Lee Road, Suite 200 Wayne, Pennsylvania 19087 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On August 7, 2025, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended June 30, 2025. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended June 30, 2025

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:August 7, 2025 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202505010001708035false00017080352025-05-012025-05-01

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, 2025

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

600 Lee Road, Suite 200 Wayne, Pennsylvania 19087 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On May 1, 2025, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended March 31, 2025. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended March 31, 2025

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:May 1, 2025 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202502270001708035false00017080352025-02-272025-02-27

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, 2025

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On February 27, 2025, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter and year ended December 31, 2024. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter and year ended December 31, 2024

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:February 27, 2025 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202410310001708035false00017080352024-10-312024-10-31

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, 2024

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On October 31, 2024, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended September 30, 2024. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended September 30, 2024

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:October 31, 2024 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202408010001708035false00017080352024-08-012024-08-01

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, 2024

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On August 1, 2024, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended June 30, 2024. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended June 30, 2024

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:August 1, 2024 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202405020001708035false00017080352024-05-022024-05-02

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, 2024

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On May 2, 2024, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended March 31, 2024. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended March 31, 2024

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:May 2, 2024 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202402280001708035false00017080352024-02-282024-02-28

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, 2024

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On February 28, 2024, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter and year ended December 31, 2023. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter and year ended December 31, 2023

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:February 28, 2024 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202311020001708035false00017080352023-11-022023-11-02

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, 2023

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On November 2, 2023, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended September 30, 2023. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended September 30, 2023

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:November 2, 2023 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202308030001708035false00017080352023-08-032023-08-03

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): August 3, 2023

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On August 3, 2023, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended June 30, 2023. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended June 30, 2023

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:August 3, 2023 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202305040001708035false00017080352023-05-042023-05-04

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): May 4, 2023

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On May 4, 2023, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended March 31, 2023. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended March 31, 2023

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:May 4, 2023 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202302280001708035false00017080352023-02-282023-02-28

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, 2023

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On February 28, 2023, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter and year ended December 31, 2022. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter and year ended December 31, 2022

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:February 28, 2023 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202211010001708035false00017080352022-11-012022-11-01

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): November 1, 2022

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On November 1, 2022, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended September 30, 2022. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended September 30, 2022

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:November 1, 2022 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

ecvt-202207290001708035false00017080352022-07-292022-07-29

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): July 29, 2022

Ecovyst Inc.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On July 29, 2022, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended June 30, 2022. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter ended June 30, 2022

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:July 29, 2022 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer

8-K

false 0001708035 0001708035 2022-04-28 2022-04-28

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): April 28, 2022

ECOVYST INC.

Commission File Number: 001-38221

Delaware

81-3406833

(State or other jurisdiction of incorporation or organization)

(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania

19355

(Address of principal executive offices)

(Zip Code) (484) 617-1200 (Registrant’s telephone number, including area code)

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))

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

Title of each class

Trading symbol

Name of each exchange on which registered

Common stock, par value $0.01 per share

ECVT

New York Stock Exchange 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.  ☐

Item 2.02 Results of Operations and Financial Condition.

On April 28, 2022, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter ended March 31, 2022. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.

Description

99.1

Press release issued by Ecovyst Inc. announcing financial results for the quarter ended March 31, 2022

104

The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date: April 28, 2022

Ecovyst Inc.

By:

/s/ MICHAEL FEEHAN

Name:

Michael Feehan

Title:

Vice President and Chief Financial Officer

ecvt-202202250001708035false00017080352022-02-252022-02-25

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, 2022

ECOVYST INC.

Commission File Number: 001-38221

Delaware81-3406833 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania 19355 (Address of principal executive offices)(Zip Code)

(610) 651-4400

(Registrant’s telephone number, including area code)

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))

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

Title of each classTrading symbolName of each exchange on which registered Common stock, par value $0.01 per shareECVTNew York Stock Exchange

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.☐

Item 2.02 Results of Operations and Financial Condition.

On February 25, 2022, Ecovyst Inc. issued a press release announcing the reporting of its financial results for the quarter and year ended December 31, 2021. A copy of the press release is furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed “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. The information in this Current Report on Form 8-K (including the exhibit attached hereto) shall not be deemed incorporated by reference into any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01 Financial Statements and Exhibits.

(d)Exhibits

Exhibit No. Description

99.1Press release issued by Ecovyst Inc. announcing financial results for the quarter and year ended December 31, 2021

104The cover page from this Current Report on Form 8-K of Ecovyst Inc., formatted in Inline XBRL and included as Exhibit 101

SIGNATURE

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.

Date:February 25, 2022 Ecovyst Inc.

By: /s/ MICHAEL FEEHAN

Name:Michael Feehan

Title:Vice President and Chief Financial Officer