Results of Operations and Financial Condition. On August 6, 2026, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the second quarter of 2026. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.

Results of Operations and Financial Condition. On May 7, 2026, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the first quarter of 2026. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.

Senior Vice President and Chief Financial Officer — Jamie A. Beggs: Ms. Beggs resigned to pursue other professional opportunities.

Results of Operations and Financial Condition. On February 12, 2026, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the fourth quarter of 2025. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.

Results of Operations and Financial Condition. On November 5, 2025, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the third quarter of 2025. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.

Results of Operations and Financial Condition. On August 1, 2025, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the second quarter of 2025. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.

Entry into a Material Definitive Agreement. On June 12, 2025 (the “ Closing Date ”), Avient Corporation, an Ohio corporation (the “ Company ”), entered into a Revolving Credit Agreement (the “ Credit Agreement ”) with JPMorgan Chase Bank, N.A., as administrative agent, and the various lenders party thereto, which replaces the Company’s existing Third Amended and Restated Credit Agreement, dated as of June 28, 2019 (as amended), by and among the Company, the Company’s subsidiaries party theret…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

Senior Vice President and President of Specialty Engineered Materials — Christopher L. Pederson: The filing discloses the planned retirement of a senior business unit leader with a successor search already in progress, indicating an orderly succession rather than a sudden loss.

Results of Operations and Financial Condition. On May 6, 2025, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the first quarter of 2025. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

Entry into a Material Definitive Agreement. Amendment to Term Loan Agreement On March 12, 2025, Avient Corporation, an Ohio corporation (the “ Company ”), and certain subsidiaries of the Company amended its secured Term Loan Agreement (as defined below) to create a new tranche of term loans (the “ Term B-9 Loans ”) in an initial principal amount of $721 million, the proceeds of which were used to refinance all of the outstanding term loans under the Term Loan Agreement. The Amendment Agreemen…

Results of Operations and Financial Condition. On February 13, 2025, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the fourth quarter of 2024. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.

Results of Operations and Financial Condition. On October 31, 2024, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the third quarter of 2024. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. On September 19, 2024, Avient Corporation, an Ohio corporation (the “ Company ”), entered into an indenture (the “ Indenture ”) with U.S. Bank Trust Company, National Association, as trustee (the “ Trustee ”), relating to the issuance by the Company of $650,000,000 aggregate principal amount of 6.250% Senior Notes due 2031 (the “ Notes ”). The Notes were sold on September 19, 202…

Entry into a Material Definitive Agreement.

Other Events. On September 5, 2024, Avient Corporation, an Ohio corporation (the “ Company ”), announced the pricing of its private offering of $650,000,000 aggregate principal amount of 6.250% senior notes due 2031 (the “ Notes ”) in an offering exempt from the registration requirements of the Securities Act of 1933 (the “ Securities Act ”). Pursuant to Rule 135c of the Securities Act, the Company is filing herewith as Exhibit 99.1 the press release issued on September 5, 2024. The Notes hav…

Other Events. Senior Notes Offering On September 5, 2024, Avient Corporation, an Ohio corporation (the “ Company ”), announced the commencement of a private offering of $650,000,000 aggregate principal amount of senior notes due 2031 (the “ 2031 Notes ”) in an offering exempt from the registration requirements of the Securities Act of 1933 (“ Securities Act ”). Pursuant to Rule 135c of the Securities Act, the Company is filing herewith as Exhibit 99.1 the press release issued on September 5,…

Results of Operations and Financial Condition. On August 6, 2024, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the second quarter of 2024. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.

Senior Vice President — Michael Garratt: The filing discloses the planned retirement of a Senior Vice President with approved transition support and incentive vesting, indicating an orderly succession rather than a sudden loss.

Results of Operations and Financial Condition. On May 7, 2024, the Registrant issued a press release, furnished herewith as Exhibit 99.1, announcing earnings for the first quarter of 2024. The press release shall not be deemed to be “filed” under the Securities Exchange Act of 1934.