William Stiritz

Director/Board Member at POST HOLDINGS, INC.

Net worth: 500 M $ as of 30/01/2026

92 year

52 connections

Consumer Services

Consumer Non-Durables

Finance

Profile

William P. Stiritz is a businessperson who has been the head of 6 different companies and occupies the position of Non-Executive Chairman of Post Holdings, Inc. He is also on the board of Aldabra 3 Acquisition Corp. In the past he was Chairman-Emeritus at Energizer Holdings, Inc., Partner at Westgate Group LLC (Missouri), Chairman, President & Chief Executive Officer at Agribrands International, Inc., Chairman for TreeHouse Private Brands, Inc. and Chief Executive Officer at Nestlé Purina PetCare Co. William P. Stiritz received an undergraduate degree from Northwestern University and a graduate degree from St. Louis University.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
POST HOLDINGS, INC. 9.47%	17/12/2025	4,888,168 ( 9.47% )	500 M $	30/01/2026

William Stiritz active positions

Companies	Position	Start
POST HOLDINGS, INC.	Director/Board Member	15/12/2025
Aldabra 3 Acquisition Corp. Aldabra 3 Acquisition Corp. Financial ConglomeratesFinance Operates as a blank check company	Director/Board Member	23/08/2007
Fairmount Holdings, Inc. Fairmount Holdings, Inc. Movies/EntertainmentConsumer Services Engages in horse racing casino activities	President	-

All active positions of William Stiritz

Former positions of William Stiritz

Companies	Position	End
Westgate Group LLC Westgate Group LLC Personnel ServicesCommercial Services Provides executive search services	Corporate Officer/Principal	07/09/2017
RALCORP HOLDINGS, INC.	Chairman	31/01/2012
VAIL RESORTS, INC.	Director/Board Member	16/09/2009
ENERGIZER HOLDINGS, INC.	Chairman	31/12/2006
Westgate Group LLC (Missouri) Westgate Group LLC (Missouri) Investment ManagersFinance Westgate Group invests in consumer-oriented companies including those in the food industries.	President	-

See the detail of William Stiritz's experience

Training of William Stiritz

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

See the detail of William Stiritz's experience

Connections

1st degree connections

1st degree companies

Male

Female

Members of the board

Executives

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Linked companies

Private companies	16
Ball Corp. Ball Corp. Containers/PackagingProcess Industries Manufactures and supplies aerosol containers, aluminium slugs and cups and manufactures spacecraft, components, and instruments for national security aerospace markets	Process Industries
Macy's, Inc. Macy's, Inc. Department StoresRetail Trade Operates department stores	Retail Trade
The May Department Stores Co. The May Department Stores Co. Department StoresRetail Trade Owns and operates retail distribution department stores	Retail Trade
Vail Resorts, Inc. Vail Resorts, Inc. Hotels/Resorts/Cruise linesConsumer Services Owns and operates resorts	Consumer Services
TreeHouse Private Brands, Inc. TreeHouse Private Brands, Inc. Food: Specialty/CandyConsumer Non-Durables Manufactures cereal, cookies, crackers, pickles, beverages and bakery items	Consumer Non-Durables
Agribrands International, Inc. Agribrands International, Inc. Agricultural Commodities/MillingProcess Industries Produces and markets formula animal feeds and other agricultural products, and pet foods	Process Industries
Aldabra 3 Acquisition Corp. Aldabra 3 Acquisition Corp. Financial ConglomeratesFinance Operates as a blank check company	Finance
Post Holdings, Inc. Post Holdings, Inc. Food: Specialty/CandyConsumer Non-Durables Manufactures markets and distributes branded ready-to-eat cereals	Consumer Non-Durables
Energizer Holdings, Inc. Energizer Holdings, Inc. Household/Personal CareConsumer Non-Durables Manufactures and markets batteries and lighting products	Consumer Non-Durables
Reliance Bancshares, Inc. (Missouri) Reliance Bancshares, Inc. (Missouri) Regional BanksFinance Operates as a holding company with interests in providing banking services to individuals and corporate customers	Finance
Westgate Group LLC Westgate Group LLC Personnel ServicesCommercial Services Provides executive search services	Commercial Services
Nestle Purina PetCare Co. Nestle Purina PetCare Co. Food: Specialty/CandyConsumer Non-Durables Engages in production of dog and cat treats products	Consumer Non-Durables
Northwestern University Northwestern University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
St. Louis University St. Louis University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Westgate Group LLC (Missouri) Westgate Group LLC (Missouri) Investment ManagersFinance Westgate Group invests in consumer-oriented companies including those in the food industries.	Finance
Fairmount Holdings, Inc. Fairmount Holdings, Inc. Movies/EntertainmentConsumer Services Engages in horse racing casino activities	Consumer Services