As of January 2013, Eliza's Quest Food had succeeded in returning Postum to many grocery stores across the United States and Canada.

[7] On May 28, 2013, Post Holdings purchased the branded and private label cereal, granola and snacks business of Hearthside Food Solutions, which included the Golden Temple, Peace Cereal, Sweet Home Farm and Willamette Valley Granola Company brands, originally Yogi Bhajan's Sikh Dharma International's Golden Temple of Oregon's cereal division.

Dymatize Enterprises is a manufacturer and marketer of premium protein powders, bars and nutritional supplements.

On October 1, 2014, Post Holdings acquired PowerBar, Musashi and related worldwide assets from Nestlé.

[13] On November 1, 2014, Post Holdings acquired American Blanching Company, a manufacturer of private label peanut butter.

On July 1, 2020, Post acquired Henningsen Foods, a manufacturer of value-added egg, meat and poultry products.

On December 14, 2020, Post announced it will acquire Almark Foods, a leading provider of hard-cooked and deviled egg products.

[26] On February 9, 2021, Post announced that one of its subsidiaries, Post Holdings Partnering Corporation (“PHPC”), a newly formed special purpose acquisition company, filed a registration statement on Form S-1 with the Securities and Exchange Commission (“SEC”) in connection with a proposed initial public offering.

[32] On June 1, 2021, Post announced it acquired the ready-to-eat ("RTE") cereal business of TreeHouse Foods.

[34] On August 9, 2022, Post announced debt-for-equity exchange and offering of BellRing Brands Common Stock by selling stockholders.