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Related Party Transactions (Notes) | 12 Months Ended
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Sep. 30, 2025
Related Party Transactions [Abstract] |
Related party transactions | RELATED PARTY TRANSACTIONS Transactions between the Company and Post Holdings, Inc. (“Post”) were considered related party transactions as certain of the Company’s directors serve as officers and/or directors of Post. MSA Fees and Royalties The Company uses certain functions and services performed by Post under a master services agreement (the “MSA”). These functions and services include finance, internal audit, treasury, information technology support, insurance and tax matters, the use of office and/or data center space, tax compliance services and, prior to January 2025, payroll processing services. During the years ended September 30, 2025, 2024 and 2023, MSA fees were $3.0, $3.4 and $4.0, respectively. MSA fees were reported in “Selling, general and administrative expenses” in the Consolidated Statements of Operations. The Company licenses certain intellectual property to and from Post and its subsidiaries based upon prices governed by agreements between the Company and Post and its subsidiaries, consistent with prices of similar arm's-length transactions. During each of the years ended September 30, 2025, 2024 and 2023, royalties paid to and received from Post and its subsidiaries were immaterial. Co-Packing Agreement Premier Nutrition Company, LLC (“Premier Nutrition”), a subsidiary of the Company, has a co-packing agreement with Comet Processing, Inc. (“Comet”), a wholly-owned subsidiary of Post (the “Co-Packing Agreement”). Under the Co-Packing Agreement, Premier Nutrition procures certain packaging materials for Comet that Comet utilizes in the production of RTD shakes for Premier Nutrition. Comet began manufacturing RTD shakes in December 2023. The Company purchased $62.2 and $8.6 of RTD shakes from Comet during the years ended September 30, 2025 and 2024, respectively. There were no purchases of RTD shakes manufactured by Comet during fiscal 2023. As of September 30, 2025 and 2024, the Company had current payables with Post of $3.7 and $1.5, respectively, related to RTD shake purchases and MSA fees, which were included in “Accounts payable” on the Consolidated Balance Sheets. Current receivables with Post at both September 30, 2025 and 2024 were immaterial.

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- Definition The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-5 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(e)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/850/tableOfContent Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-6 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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