Primo Brands Corporation Announces Secondary Offering of 20,000,000 Shares of Class A Common Stock by an Affiliate of One Rock Capital Partners

TAMPA, Fla. and STAMFORD, Conn., Aug. 6, 2026 — Primo Brands Corporation (NYSE: PRMB) ("Primo Brands" or the "Company") today announced that one of its stockholders, who is an affiliate of One Rock Capital Partners, LLC (the "Selling Stockholder"), intends to offer for sale in an underwritten secondary offering 20,000,000 shares of the Company's Class A common stock, par value $0.01 per share (the "Class A Common Stock"), pursuant to the Company's shelf registration statement on Form S-3 filed with the Securities and Exchange Commission (the "SEC"). The Selling Stockholder will receive all of the net proceeds from this offering. No shares are being sold by the Company.

Morgan Stanley is serving as the underwriter for the proposed offering.

In addition, we have entered into a stock purchase agreement with the Selling Stockholder, to repurchase $10 million of shares of our Class A Common Stock in a private transaction at the price at which the shares are sold to the public less the underwriting discounts and commissions (the "Share Repurchase"). The closing of the Share Repurchase is expected to be concurrent with the closing of this offering. The repurchased shares of Class A Common Stock will no longer be outstanding after this offering. The completion of the Share Repurchase is contingent on the satisfaction of customary closing conditions and conditioned upon the completion of this offering. The completion of this offering is not conditioned upon the completion of the Share Repurchase.

A post-effective amendment on Form S-3, including exhibits, to our shelf registration statement on Form S-1 (including a prospectus) relating to this offering of Class A Common Stock has been declared effective by the SEC. This offering will be made only by means of a prospectus supplement and an accompanying prospectus. You may obtain these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Copies of the prospectus supplement and accompanying prospectus related to this offering may also be obtained by contacting Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, 2nd Floor, New York, NY 10014.

This communication is for informational purposes only and does not constitute an offer to sell, or a solicitation of an offer to buy, any security and does not constitute an offer, solicitation, or sale of any security in any jurisdiction in which such offer, solicitation, or sale would be unlawful.

About Primo Brands Corporation

Primo Brands is a leading North American branded beverage company focused on healthy hydration, delivering responsibly sourced diversified offerings across products, formats, channels, price points, and consumer occasions, distributed in every U.S. state and Canada. Primo Brands employs more than 12,000 associates with dual headquarters in Tampa, Florida, and Stamford, Connecticut.