MARK W. WESTPHAL - 12 Nov 2025 Form 4 Insider Report for Post Holdings, Inc. (POST)

Role
PRES., FOODSERVICE
Signature
/s/ Diedre J. Gray, Attorney-in-Fact
Issuer symbol
POST
Transactions as of
12 Nov 2025
Transactions value $
-$379,976
Form type
4
Filing time
14 Nov 2025, 16:39:33 UTC
Previous filing
24 Oct 2025
Next filing
18 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
WESTPHAL MARK W PRES., FOODSERVICE C/O POST HOLDINGS, INC., 2503 S. HANLEY ROAD, ST. LOUIS /s/ Diedre J. Gray, Attorney-in-Fact 14 Nov 2025 0001730096

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction POST Common Stock Options Exercise $0 +3.1K +1.73% $0.00 182K 12 Nov 2025 Direct
transaction POST Common Stock Tax liability -$150K -1.41K -0.78% $106.02 181K 12 Nov 2025 Direct F1
transaction POST Common Stock Options Exercise $0 +4.76K +2.64% $0.00 185K 12 Nov 2025 Direct
transaction POST Common Stock Tax liability -$230K -2.17K -1.17% $106.02 183K 12 Nov 2025 Direct F2
holding POST Common Stock 17.2K 12 Nov 2025 By 401(k) Plan

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction POST Restricted Stock Units Options Exercise $0 -3.1K -100% $0.00 0 12 Nov 2025 Common Stock 3.1K Direct F3, F4
transaction POST Restricted Stock Units Options Exercise $0 -4.76K -33.33% $0.00 9.52K 12 Nov 2025 Common Stock 4.76K Direct F3, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Surrender of shares in payment of tax withholding due as a result of the vesting of 3,097 restricted stock units ("RSUs") in accordance with Rule 16b-3.
F2 Surrender of shares in payment of tax withholding due as a result of the vesting of 4,759 RSUs in accordance with Rule 16b-3.
F3 Each RSU represents a contingent right to receive one share of Post Holdings, Inc. common stock. The RSUs were granted under the Post Holdings, Inc. Amended and Restated 2021 Long-Term Incentive Plan in a transaction exempt under Rule 16b-3.
F4 The RSUs vested on the first anniversary of the date of grant without any action on the part of the participant.
F5 One-third of the RSUs vest on each of the first, second and third anniversaries of the date of grant without any action on the part of the participant, subject to the terms of the applicable award agreement.