Sec Form 4 Filing - Landry Stephen Alan @ TreeHouse Foods, Inc. - 2026-02-11

FORM 4 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

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1. Name and Address of Reporting Person Landry Stephen Alan 2. Issuer Name and Ticker or Trading Symbol TreeHouse Foods, Inc. [ THS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SVP, Chief Operations Officer (Last) (First) (Middle) 2021 SPRING ROAD, SUITE 600 3. Date of Earliest Transaction (MM/DD/YY) 02/11/2026 (Street) OAK BROOK, IL60523 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 ( 1 ) 02/11/2026 M 19,593 A 19,593 D Common Stock ( 1 ) 02/11/2026 D 19,593 D 0 D Common Stock 02/11/2026 A 21,664 A 21,664 D Common Stock 02/11/2026 D 21,664 D 0 D

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 Restricted Stock Unit ( 3 ) 02/11/2026 M 19,593 ( 3 ) ( 3 ) Common Stock 19,593 ( 2 ) ( 3 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Landry Stephen Alan 2021 SPRING ROAD, SUITE 600 OAK BROOK, IL60523 SVP, Chief Operations Officer Signatures /s/ Kristy N. Waterman, by Power of Attorney 02/11/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Reflects vested restricted stock units ("RSUs") further described in footnote three below. ( 2 )Pursuant to the Agreement and Plan of Merger ("Merger Agreement"), dated as of November 10, 2025, by and among TreeHouse Foods, Inc. ("TreeHouse"), Industrial F&B Investments II, Inc. ("Parent"), and Industrial F&B Investments III, Inc. ("Merger Sub"), Merger Sub merged with and into TreeHouse, with TreeHouse surviving the merger as a wholly owned subsidiary of Parent (the "Merger"). At the effective time of the Merger (the "Effective Time"), each share of TreeHouse's common stock, par value $0.01 per share, that was issued and outstanding immediately prior to the Effective Time was automatically canceled and converted into the right to receive (i) $22.50 in cash, less applicable taxes and withholding and (ii) one contractual contingent value right, which represents the right to receive a portion of the net proceeds, if any, resulting from certain litigation relating to part of TreeHouse's coffee business (clauses (i) and (ii) collectively, the "Merger Consideration"). ( 3 )Each RSU represents a contingent right to receive one share of common stock of TreeHouse. Pursuant to the Merger Agreement, each RSU that was outstanding as of immediately prior to the Effective Time became fully vested and was automatically canceled and converted into the right to receive the Merger Consideration, less applicable taxes and withholding. ( 4 )Pursuant to the Merger Agreement, each performance share unit ("PSU") with respect to TreeHouse common stock subject to performance-based vesting conditions that was outstanding as of immediately prior to the Effective Time became vested in the number of shares of TreeHouse common stock assuming that 130% of target level of performance had been achieved, and each such PSU was automatically canceled and converted into the right to receive the Merger Consideration, less applicable taxes and withholding, and any unvested portion was automatically canceled for no consideration.

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).

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