Company: PRMB
Filing Date: 2025-05-08
Form Type: 424B3
Source: 0002042694-25-000009
Chunk: 0

Company: Primo Brands Corp
Filing Date: 2025-05-08
Form: 424B3
Chunk 0
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#### Filed Pursuant to Rule 424(b)(3)

#### Registration No. 333-284501

#### PROSPECTUS SUPPLEMENT NO. 4
(To prospectus dated March 7, 2025)

#### Primo Brands Corporation
#### ___________________________________________

This prospectus supplement updates, amends, and supplements the prospectus dated March 7, 2025 (the “Prospectus”), which forms a part of our Registration Statement on Form S-1, as amended (Registration No. 333-284501).

This prospectus supplement is being filed to update, amend, and supplement the information included in the Prospectus with the information contained in our Current Report on Form 8-K filed with the Securities and Exchange Commission (the “SEC”) on May 8, 2025, which is set forth below.

This prospectus supplement is not complete without the Prospectus. This prospectus supplement should be read in conjunction with the Prospectus, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in this prospectus supplement updates or supersedes the information contained in the Prospectus. Capitalized terms used in this prospectus supplement and not otherwise defined herein have the meanings specified in the Prospectus. Please keep this prospectus supplement with your Prospectus for future reference.

Our Class A common stock is listed on the New York Stock Exchange (“NYSE”) under the symbol “PRMB.” On May 7, 2025, the closing price of our Class A common stock on the NYSE was $32.86.

#### ___________________________________________

Investing in our securities involves certain risks. See the section entitled “Risk Factors” beginning on page 6 of the Prospectus and under similar headings in any further amendments or supplements to the Prospectus to read about factors you should consider before buying our securities.

Neither the SEC nor any state securities commission nor any other regulatory body has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus supplement or the Prospectus. Any representation to the contrary is a criminal offense.

#### ___________________________________________

<div align='center'>The date of this prospectus supplement is May 8, 2025.</div>

|US-DOCS\155468052.2||

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549
#### ___________________________

#### FORM 10-Q
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