EXHIBIT 32.1

Certification Pursuant to

18 U.S.C. Section 1350, as adopted pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

The undersigned, the President and Chief Investment Officer of Post Holdings Partnering Corporation (the “Company”), hereby certifies that, to his knowledge on the date hereof:

(a)    the annual report on Form 10-K for the period ended December 31, 2021, filed on the date hereof with the Securities and Exchange Commission (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(b)    information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	March 25, 2022	By:	/s/ Robert V. Vitale
			Robert V. Vitale
			President and Chief Investment Officer

A signed original of this written statement required by Section 906 has been provided to Post Holdings Partnering Corporation and will be retained by Post Holdings Partnering Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

Certification Pursuant to

18 U.S.C. Section 1350, as adopted pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

The undersigned, the Chief Financial Officer of Post Holdings Partnering Corporation (the “Company”), hereby certifies that, to his knowledge on the date hereof:

(a)    the annual report on Form 10-K for the period ended December 31, 2021, filed on the date hereof with the Securities and Exchange Commission (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(b)    information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	March 25, 2022	By:	/s/ Bradly A. Harper
			Bradly A. Harper
			Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to Post Holdings Partnering Corporation and will be retained by Post Holdings Partnering Corporation and furnished to the Securities and Exchange Commission or its staff upon request.