Material Event (Form 8-K)

Item 8.01. Other Events.

On November 9, 2025, the Board of Directors of Primo Brands Corporation (the "Company") approved an increase of $50 million to the Company's existing share repurchase program of $250 million, bringing the total authorization under the program to $300 million worth of shares of the Company's Class A common stock (the "Revised Repurchase Program"). Under the Revised Repurchase Program, the Company had approximately $202.3 million of capacity available for repurchases as of November 9, 2025.

The Company may purchase shares from time to time at the discretion of management through open market purchases, block trades, accelerated or other structured share repurchase programs, privately negotiated transactions, Rule 10b5-1plans or other means. Open market repurchases will be structured to occur in accordance with applicable federal securities laws, including within the pricing and volume requirements of Rule 10b-18under the Securities Exchange Act of 1934, as amended. The manner, timing, pricing and amount of any transactions will be subject to the discretion of management and may be based upon market conditions, regulatory requirements and alternative opportunities that the Company may have for the use or investment of its capital. The program does not obligate the Company to acquire any particular amount of Class A common stock, and may be modified, suspended or terminated at any time at the discretion of the Board.