NYSE: DOOR CLASS ACTION NOTICE: Berger Montague encourages Masonite International Corporation (NYSE: DOOR) investors to inquire about a securities fraud class action. PHILADELPHIA, March 24, 2026 (GLOBE NEWSWIRE) - National plaintiffs' law firm Berger Montague PC announces that a class action lawsuit has been filed against Masonite International Corporation (NYSE: DOOR) ("Masonite" or the "Company") on behalf of investors who sold Masonite common stock during the period from June 5, 2023 through February 8, 2024 (the "Class Period"). Headquartered in Tampa, FL, Masonite is a global designer and producer of interior and exterior doors for the residential and non-residential building industry. According to the lawsuit, defendants failed to disclose that Masonite had received multiple formal acquisition offers from Owens Corning at significant premiums to the market price while the Company was actively repurchasing its own shares from investors during the Class Period. When Masonite was ultimately acquired by Owens Corning, investors allegedly learned that Masonite had repurchased shares at artificially depressed prices, and Masonite's stock price was impacted upon disclosure of the previously withheld information, resulting in damages to Class Period investors. If you are a Masonite investor and would like to learn more about this action, CLICK HERE or please contact Berger Montague: Andrew Abramowitz at [email protected] or (215) 875-3015, or Caitlin Adorni at [email protected] or (267)764-4865. About Berger Montague Berger Montague is one of the nation's preeminent law firms focusing on complex civil litigation, class actions, and mass torts in federal and state courts throughout the United States. With more than $2.4 billion in 2025 post-trial judgments alone, the Firm is a leader in the fields of complex litigation, antitrust, consumer protection, defective products, environmental law, employment law, securities, and whistleblower cases, among many other practice areas. For over 55 years, Berger Montague has played leading roles in precedent-setting cases and has recovered over $50 billion for its clients and the classes they have represented. Berger Montague is headquartered in Philadelphia and has offices in Chicago; Malvern, PA; Minneapolis; San Diego; San Francisco; Toronto, Canada; Washington, D.C., and Wilmington, DE. Andrew Abramowitz Berger Montague (215) 875-3015 [email protected] Caitlin Adorni Berger Montague (267) 764-4865 [email protected]

SHAREHOLDER ALERT Bernstein Liebhard LLP announces A securities fraud Class Action Lawsuit has been filed against Masonite International Corporation (DOOR). Thursday, 05 March 2026 11:27 AM Class Action. Masonite Shareholders Between June 5, 2023 and February 8, 2024 - Contact Bernstein Liebhard For More Information Regarding Shareholder Lawsuit NEW YORK, NY / ACCESS Newswire / March 5, 2026 / Bernstein Liebhard LLP announces that a shareholder has filed a securities class action lawsuit on behalf of investors (the "Class") who sold the common stock of Masonite International Corporation ("Masonite" or the "Company") (Formerly NYSE:DOOR) between June 5, 2023 and February 8, 2024, inclusive. Should You Join The Masonite Class Action Lawsuit: * Do you, or did you, own shares of Masonite International Corporation (DOOR)? * Did you sell your shares between June 5, 2023 and February 8, 2024, inclusive? * Did you lose money in your investment in Masonite International Corporation? What To Do Next: If you sold Masonite common stock, and/or would like to discuss your legal rights and options please visit Masonite International Corporation Shareholder Class Action Lawsuit or contact Investor Relations Manager Peter Allocco at (212) 951-2030 or [email protected]. If you wish to serve as lead plaintiff for the Class, you must file papers by April 7, 2026. A lead plaintiff is a representative party acting on other class members' behalf in directing the litigation. Your ability to share in any recovery doesn't require that you serve as lead plaintiff. If you choose to take no action, you may remain an absent class member. All representation is on a contingency fee basis. Shareholders pay no fees or expenses. About The Lawsuit: According to the lawsuit, Defendants made misrepresentations concerning Owens Corning's offers to purchase all of Masonite's outstanding stock. About Bernstein Liebhard: Since 1993, Bernstein Liebhard LLP has recovered over $3.5 billion for its clients. In addition to representing individual investors, the Firm has been retained by some of the largest public and private pension funds in the country to monitor their assets and pursue litigation on their behalf. As a result of its success litigating hundreds of class actions, the Firm has been named to The National Law Journal's "Plaintiffs' Hot List" thirteen times and listed in The Legal 500 for sixteen consecutive years. ATTORNEY ADVERTISING. (C) 2026 Bernstein Liebhard LLP. The law firm responsible for this advertisement is Bernstein Liebhard LLP, 10 East 40th Street, New York, New York 10016, (212) 779-1414. Prior results do not guarantee or predict a similar outcome with respect to any future matter. Contact Information: Peter Allocco Investor Relations Manager Bernstein Liebhard LLP https://www.bernlieb.com (212) 951-2030 [email protected]

Bronstein, Gewirtz & Grossman LLC urges Masonite International Corporation investors to act: Class Action filed alleging investor harm. NEW YORK, Feb. 10, 2026 (GLOBE NEWSWIRE) - Bronstein, Gewirtz & Grossman, LLC, a nationally recognized investor-rights law firm, announces that a class action lawsuit has been filed against Masonite International Corporation (NYSE: DOOR) and certain of its officers. "Our practice focuses on restoring investor capital and ensuring corporate accountability to uphold market integrity," said Peretz Bronstein. This lawsuit seeks to recover damages against Defendants for alleged violations of the federal securities laws on behalf of all persons and entities that purchased or otherwise acquired Masonite securities between June 5, 2023 and February 8, 2024, both dates inclusive (the "Class Period"). Such investors are encouraged to join this case by visiting the firm's site: bgandg.com/DOOR. Masonite Case Details The Complaint alleges that, throughout the Class Period, Defendants made materially false and misleading statements and/or failed to disclose that: (1) Masonite had received multiple formal acquisition offers from Owens Corning to purchase all outstanding shares of Masonite common stock at prices significantly above the then-current market prices; (2) despite possessing this material, nonpublic information, Masonite continued to repurchase Masonite common stock from unsuspecting investors at prices far below Owens Corning's offer levels; and (3) as a result, Defendants were obligated to disclose the existence of these acquisition offers or abstain from purchasing Masonite common stock, rendering their statements concerning the Company's business, operations, and stock repurchase activity materially false and misleading at all relevant times. What's Next for Masonite Investors? A class action lawsuit has already been filed. If you wish to review a copy of the Complaint, you can visit the firm's site: bgandg.com/DOOR. or you may contact Peretz Bronstein, Esq. or his Client Relations Manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC at 917-590-0911. If you suffered a loss in Masonite you have until April 7, 2026, to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn't require that you serve as lead plaintiff. No Cost to Masonite Investors We, Bronstein, Gewirtz & Grossman LLC, represent investors in class actions on a contingency fee basis. That means we will ask the court to reimburse us for out-of-pocket expenses and attorneys' fees, usually a percentage of the total recovery, only if we are successful. Why Bronstein, Gewirtz & Grossman, LLC for Masonite Securities Class Action? Bronstein, Gewirtz & Grossman, LLC is a nationally recognized firm that represents investors in securities fraud class actions and shareholder derivative suits. Our firm has recovered hundreds of millions of dollars for investors nationwide. More at www.bgandg.com "Our practice centers on restoring investor capital and ensuring corporate accountability, which serves to uphold the essential integrity of the marketplace," said Peretz Bronstein, Founding Partner of Bronstein, Gewirtz & Grossman, LLC. Contact Info Peretz Bronstein, Esq. or Nathan Miller Bronstein, Gewirtz & Grossman, LLC 917-590-0911 | [email protected] Attorney advertising. Prior results do not guarantee similar outcomes.