Sec Form 3 Filing - WARBURG PINCUS LLC @ OCEANFIRST FINANCIAL CORP - 2026-06-01

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person WARBURG PINCUS LLC 2. Issuer Name and Ticker or Trading Symbol OCEANFIRST FINANCIAL CORP [ OCFC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O WARBURG PINCUS, 450 LEXINGTON AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 06/01/2026 (Street) NEW YORK, NY10017 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, par value $0.01/share 9,574,639 I See Footnotes. ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 6 ) Non-Voting Common Equivalent Stock, par value $0.01/share 1,812 ( 7 ) I See Footnotes. ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 6 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Warrants ( 9 ) ( 10 ) ( 9 )( 10 ) 06/01/2033 NVCE Stock ( 7 ) ( 8 ) 11,386.64 ( 8 ) I See Footnotes. ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 6 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other WARBURG PINCUS LLC C/O WARBURG PINCUS 450 LEXINGTON AVENUE NEW YORK, NY10017 X Warburg Pincus (Bermuda) Private Equity GP Ltd. C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X Signatures See Exhibit 99.1 06/09/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Reflects securities held directly by (i) WPGG 14 Orion Investments, L.P., a Delaware limited partnership ("WPGG14 Purchaser") and (ii) WPFS II Orion Investments, L.P., a Delaware limited partnership ("WPFSII Purchaser" and, together with WPGG14 Purchaser, the "Purchasers"). The equity interests of WPGG14 Purchaser are held by (i) Warburg Pincus (Callisto) Global Growth 14 (Cayman), L.P., a Cayman Islands exempted limited partnership ("WP Callisto 14"), (ii) Warburg Pincus (Europa) Global Growth 14 (Cayman), L.P., a Cayman Islands exempted limited partnership ("WP Europa 14"), (iii) Warburg Pincus Global Growth 14-B (Cayman), L.P., a Cayman Islands exempted limited partnership ("WP Global Growth 14-B"), (iv) Warburg Pincus Global Growth 14-E (Cayman), L.P., a Cayman Islands exempted limited partnership ("WP Global Growth 14-E"), (continued on footnote 2) ( 2 )(continued from footnote 1) (v) Warburg Pincus Global Growth 14 Partners (Cayman), L.P., a Cayman Islands exempted limited partnership ("Warburg Pincus Global Growth 14 Partners"), and (vi) WP Global Growth 14 Partners (Cayman), L.P., a Cayman Islands exempted limited partnership ("WP Global Growth 14 Partners" and, together with WP Callisto 14, WP Europa 14, WP Global Growth 14-B, WP Global Growth 14-E and Warburg Pincus Global Growth 14 Partners, the "WP Global Growth 14 Funds"). The equity interests of WPFSII Purchaser are held by (i) Warburg Pincus Financial Sector II (Cayman), L.P., a Cayman Islands exempted limited partnership ("WP Financial Sector II LP"), (ii) Warburg Pincus Financial Sector II-E (Cayman), L.P., a Cayman Islands exempted limited partnership ("WP Financial Sector II-E"), and (iii) Warburg Pincus Financial Sector II Partners (Cayman), L.P., a Cayman Islands (continued on footnote 3) ( 3 )(continued from footnote 2) exempted limited partnership ("WP Financial Sector II Partners" and, together with WP Financial Sector II LP and WP Financial Sector II-E, the "WP Financial Sector II Funds"). WPGG 14 Orion Investments GP, LLC, a Delaware limited liability company ("WPGG14 Orion GP") is the general partner of WPGG14 Purchaser. Warburg Pincus (Cayman) Global Growth 14 GP, L.P., a Cayman Islands exempted limited partnership ("WPGG Cayman 14 GP"), is the general partner of each of the WP Global Growth 14 Funds. Warburg Pincus (Cayman) Global Growth 14 GP LLC, a Cayman Islands exempted limited liability company ("WPGG Cayman 14 GP LLC"), is the general partner of WPGG Cayman 14 GP. WPFSII Orion Investments GP, LLC, a Delaware limited liability company, ("WPFSII Orion GP") is the general partner of WPFSII Purchaser. Warburg Pincus (Cayman) Financial Sector II GP, L.P., a Cayman Islands exempted limited partnership ("WPFS Cayman II GP") (continued on footnote 4) ( 4 )(continued from footnote 3), is the general partner of each of the WP Financial Sector II Funds. Warburg Pincus (Cayman) Financial Sector II GP LLC, a Cayman Islands exempted limited liability company ("WPFS Cayman II GP LLC"), is the general partner of WPFS Cayman II GP. Warburg Pincus Partners II (Cayman), L.P., a Cayman Islands exempted limited partnership ("WPP II Cayman"), is the managing member of WPGG Cayman 14 GP LLC and WPFS Cayman II GP LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd., a Bermuda exempted company ("WP Bermuda GP"), is the general partner of WPP II Cayman. Warburg Pincus LLC, a New York limited liability company ("WP LLC" and, together with the WP Global Growth 14 Funds, the WP Financial Sector II Funds, WPGG14 Orion GP, WPGG Cayman 14 GP, WPGG Cayman 14 GP LLC, WPFSII Orion GP, WPFS Cayman II GP, WPFS Cayman II GP LLC, WPP II Cayman and WP Bermuda GP, the "Reporting Persons" (continued on footnote 5) ( 5 )(continued from footnote 4) and each, a "Reporting Person"), is the manager of the WP Global Growth 14 Funds and WP Financial Sector II Funds. Investment and voting decisions with respect to the securities of the Issuer held by the Reporting Persons are made by a committee comprised of three or more individuals and all members of such committee disclaim beneficial ownership of the securities of the Issuer held by the Reporting Persons. Information with respect to each of the Reporting Persons is given solely by such Reporting Persons, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person. Pursuant to Rule 16a-1(a)(4) of the Exchange Act, each of the Reporting Persons, other than the Purchasers, (continued on footnote 6) ( 6 )(continued from footnote 5) herein states that this filing shall not be deemed an admission that it or he is the beneficial owner of any of the securities of the Issuer covered by this Statement. Each of the Reporting Persons disclaims their beneficial ownership of such securities except to the extent of its pecuniary interest therein. ( 7 )The Issuer issued an aggregate of 1,812 shares of non-voting common equivalent stock, par value $0.01/share ("NVCE Stock") to the Purchasers on June 1, 2026, pursuant to the Investment Agreement, dated as of December 29, 2025 (the "Investment Agreement"), by and among the Issuer and the Purchasers. ( 8 )The Warrants are exercisable, in whole or in part, to purchase 11,386.64 shares of NVCE Stock. ( 9 )The Warrants are exercisable at a price of $19,760 per share, subject to customary anti-dilution adjustments provided under the Warrants. The Warrants carry a term of seven years and can be exercised voluntarily following the third anniversary of the closing of the transactions contemplated by the Investment Agreement (the "Closing"). The Warrants can also be voluntarily exercised prior to the third anniversary of the Closing, (A) in the event the market price of common stock, par value $0.01/share ("Common Stock") reaches or exceeds $30 per share at the closing of any trading day or (B) in connection with certain change of control transactions involving the Issuer. (continued on footnote 10) ( 10 )(continued from footnote 9) The Warrants are subject to mandatory exercise, at any time, in the event the market price of Common Stock reaches or exceeds $30 per share for a certain number of trading days over a specified period. In the event of a change of control transaction where less than 90% of the consideration in such transaction is comprised of equity securities traded on the NASDAQ or NYSE, the Purchasers will be entitled to receive additional shares if they exercise the Warrants in connection with such transaction.

Remarks: Solely for purposes of Section 16 of the Exchange Act, each of the Reporting Persons may be deemed a director-by-deputization by virtue of a contractual right to designate a representative to serve on the board of directors of the Issuer. Todd Schell became a director of the Issuer on June 1, 2026. Mr. Schell is a Principal in WP LLC's Financials Services group. See Signatures of the Reporting Persons attached as Exhibit 99.1.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.