Results of Operations and Financial Condition. On August 6, 2026, the Company reported its results of operations for the quarter ended June 27, 2026. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Results of Operations and Financial Condition. On May 7, 2026, the Company reported its results of operations for the quarter ended March 28, 2026. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Results of Operations and Financial Condition. On February 5, 2026, the Company reported its results of operations for the quarter ended December 27, 2025. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Executive Vice President, Chief Accounting Officer — Erin Maile: Ms. Maile was promoted to a higher executive position within the company.

Results of Operations and Financial Condition. On November 19, 2025, the Company reported its results of operations for the year ended September 27, 2025. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Executive Vice President, Human Resources and Administration — Eileen L. Beck: Eileen L. Beck is retiring and has transitioned to an advisory role.

President — David Parks, Achim Schalk: Two senior executives are departing the company.

Results of Operations and Financial Condition. On August 6, 2025, the Company reported its results of operations for the quarter ended June 28, 2025. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Results of Operations and Financial Condition. On May 7, 2025, the Company reported its results of operations for the quarter ended March 29, 2025. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Results of Operations and Financial Condition. On February 6, 2025, the Company reported its results of operations for the three months ended December 28, 2024. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Other Events. The disclosures from the Spinco 10-K set forth under “Part I, Item1A, Risk Factors” and “Part II, Item7, Management’s Discussion and Analysis of Financial Condition and Results of Operations” filed herewith and attached hereto as Exhibit 99.2 and Exhibit 99.3, respectively, are incorporated by reference herein. The audited combined balance sheets of Spinco as of September 28, 2024 and September 30, 2023, the related combined statements of operations, comprehensive income (loss),…

The filing describes a new employment agreement for the CEO, detailing compensation and benefits.

The filing describes the approval of annual restricted stock unit grants for non-employee directors, which is a routine compensation matter.

Results of Operations and Financial Condition. On October 30, 2024, the Company reported its results of operations for the three months ended September 30, 2024. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Entry into a Material Definitive Agreement. The information set forth under

Other Events. As previously disclosed, Glatfelter Corporation, a Pennsylvania corporation (“ Glatfelter ” or the “ Company ”), entered into certain definitive agreements (the “ Transaction Agreements ”) with Berry Global Group, Inc., a Delaware corporation (“ Berry ”), and certain of their respective subsidiaries, including Treasure Holdco, Inc, a Delaware corporation and a wholly owned subsidiary of Berry. (“ Spinco ”), which provide for a series of transactions, including the spin-off of th…

Other Events. As previously disclosed, Glatfelter Corporation, a Pennsylvania corporation (“ Glatfelter ” or the “ Company ”), entered into certain definitive agreements (the “ Transaction Agreements ”) with Berry Global Group, Inc., a Delaware corporation (“ Berry ”), and certain of their respective subsidiaries, which provide for a series of transactions, including the spinoff of the global nonwovens and hygiene films business (the “ HHNF Business ”) of Berry and subsequent merger of the HH…

Director: Four current Glatfelter directors will retire from the board upon the Closing, but their roles are being succeeded by new designees for the Magnera Board.

Results of Operations and Financial Condition. On August 8, 2024, the Company reported its results of operations for the three months ended June 30, 2024. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Vice President, Strategic Initiatives, Business Optimization & Chief Accounting Officer — Mr. David C. Elder: Mr. David C. Elder will resign from his position as Vice President, Strategic Initiatives, Business Optimization & Chief Accounting Officer.

Results of Operations and Financial Condition. On May 9, 2024, the Company reported its results of operations for the three months ended March 31, 2024. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.

Regulation FD Disclosure. On April 11, 2024, the Company issued a press release announcing Mr. Till’s and Mr. Manroa’s appointment and that Mr. Kevin M. Fogarty will continue to serve Glatfelter in the role of Non-Executive Chair of the NewCo Board. A copy of this press release is furnished on Exhibit 99.1 hereto and is incorporated herein by reference. The information in this Item 7.01, including the exhibit attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Secur…

Executive Vice President, Chief Financial Officer & Treasurer (Mr. Till); Executive Vice President, Chief Operating Officer (Mr. Manroa) — James M. Till; Tarun Manroa: Mr. Till and Mr. Manroa are being appointed to new executive roles at NewCo following the Transaction.

The filing describes the approval of long-term incentives for senior executives and other employees, which is a routine compensation matter.

Results of Operations and Financial Condition. On February 22, 2024, the Company reported its results of operations for the three months and the year ended December 31, 2023. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1.