Kellogg’s History: W.K. Kellogg and the 1906 Founding

Before the Company: The Battle Creek Cereal Experiments

The Kellogg cereal story started before there was a Kellogg Company. Dr. John Harvey Kellogg ran the Battle Creek Sanitarium, where diet and grain-based foods were part of a broader health program. His younger brother, W.K. Kellogg, worked in the operation and handled business responsibilities.

During the mid-1890s and early 1900s, the brothers were involved in developing flaked grain foods. Historical accounts differ on the exact year that should be treated as the key breakthrough, so the most reliable chronology comes from the patent record: John Harvey Kellogg filed an application for a flaked-cereal process on May 31, 1895, and U.S. Patent No. 558,393 was issued on April 14, 1896.

The patent documented a process for producing baked, crisp flakes from grain. Both brothers were involved in the cereal-development period, while W.K. Kellogg increasingly saw a broader consumer opportunity and eventually pursued it through his own business.

The cereal-development story therefore predates the corporation. The technical food work emerged from the Sanitarium environment; the independent business that became Kellogg Company began later, in 1906.

W.K. Kellogg Creates a Mass-Market Cereal Company

In February 1906, W.K. Kellogg founded the Battle Creek Toasted Corn Flake Company in Battle Creek, Michigan, to manufacture and market toasted corn flakes to the broader public. That year is the corporate founding date for the Kellogg business.

The commercial breakthrough went beyond a cereal formula. W.K. Kellogg’s business combined packaged ready-to-eat cereal with large-scale manufacturing, promotion, and recognizable branding. That combination turned a product associated with an institutional health setting into a mass consumer business.

The Kellogg name itself became part of the company’s early history. John Harvey Kellogg and businesses under his control also used the family name, and the brothers’ disputes eventually included litigation over trade names and unfair competition. A 1920 Michigan Supreme Court decision provides a legal marker in that conflict.

Meanwhile, W.K. Kellogg’s cereal company was developing its own identity. By 1909 it was operating as the Kellogg Toasted Corn Flake Company, and by 1922 the business operated under the broader Kellogg Company name.

Building the Kellogg Brand Beyond Corn Flakes

The young cereal business did not remain confined to one product or one market. Company history identifies Canada as an early international milestone in 1914, showing that geographic expansion began relatively early in the company’s development.

Product expansion also widened the brand. Kellogg Company history dates the launch of Rice Krispies to 1928. In the middle of the 20th century, the company continued adding cereal brands and using distinctive consumer marketing, including the debut of Tony the Tiger in 1952.

In 1964, Pop-Tarts extended Kellogg’s breakfast presence beyond the cereal bowl and into toaster pastries. That move illustrated a broader pattern that would become more important over time: Kellogg could use its consumer-food platform to move into adjacent forms of convenience food rather than relying only on traditional ready-to-eat cereal.

W.K. Kellogg also established the W.K. Kellogg Foundation in 1930 using wealth created through the cereal business. The Foundation is a separate philanthropic organization and is not a subsidiary or operating arm of the former Kellogg Company or its successor businesses.

When the Core Cereal Business Came Under Pressure

By the late 1990s, Kellogg’s long-established cereal business was facing sustained pressure in the United States. Contemporary reporting in 1999 described weak sales and a prolonged decline in the company’s once-dominant U.S. cereal share as Kellogg accelerated the elevation of Carlos Gutierrez to chief executive.

The episode highlighted the growth pressure created by heavy reliance on a mature core category. Kellogg remained a major cereal business, but the limits of depending so heavily on cereal had become increasingly visible.

Building a Second Growth Engine in Snacks

The next era was marked by a broader push into snacks and convenience foods. Kellogg acquired Kashi in 2000, then made a much larger move in 2001 by acquiring Keebler Foods Company in a transaction valued at approximately $4.56 billion.

Keebler brought major cookie and cracker brands along with a large direct-store-delivery system. Strategically, the acquisition gave Kellogg a larger business outside breakfast cereal and helped make the company less dependent on its original category.

Another major step came in 2012, when Kellogg completed its $2.695 billion acquisition of the Pringles business from Procter & Gamble. Kellogg said the deal nearly tripled its international snacks business, giving the company a much larger global savory-snacks platform.

Kellogg continued adding snack brands. In 2017 it acquired Chicago Bar Co., the maker of RXBAR, for approximately $600 million. By then, the company’s transformation was increasingly visible in the composition of the business rather than in any single acquisition.

Over time, these acquisitions gave Kellogg a second growth engine in snacks and convenience foods and reduced its strategic dependence on ready-to-eat cereal. The transformation unfolded over years rather than through a single deal.

Reshaping the Portfolio Rather Than Simply Expanding It

Kellogg’s acquisition strategy did not mean every business would remain permanently inside the portfolio. In 2019, Kellogg sold selected cookies, fruit and fruit-flavored snacks, pie crusts, and ice cream cone businesses to Ferrero for about $1.3 billion in cash. Keebler and related cookie brands were among the businesses transferred.

This period also included a major labor disruption. About 1,400 workers at Kellogg’s U.S. cereal plants went on strike beginning October 5, 2021. The strike lasted roughly 11 weeks before workers approved a new five-year labor agreement in December.

The 2023 Split Redefines the Kellogg Company

On June 21, 2022, Kellogg announced a plan to separate its portfolio. The original proposal contemplated three businesses: a global snacking and international cereal company, a North American cereal company, and a plant-based foods company.

Kellogg said the separation would give the businesses greater strategic, operational, and financial focus. Independent reporting at the time also highlighted the relative importance of the snacks-led operation. The final plan changed, however, and the plant-based business was not separated into a third public company.

On October 2, 2023, the restructuring was completed. Kellogg Company changed its name to Kellanova and spun off WK Kellogg Co as a separate public company.

WK Kellogg Co received the North American cereal business in the United States, Canada, and Caribbean. Kellanova, as the renamed legal continuation of Kellogg Company, retained global snacks, international cereal and noodles, North American frozen breakfast, plant-based foods, and other businesses.

The distinction is central to understanding the modern history. WK Kellogg Co was not simply the renamed Kellogg Company, and Kellanova was not merely a snack spin-off. The continuing Kellogg Company legal entity became Kellanova, while the North American cereal business became the newly independent WK Kellogg Co.

Two Successor Companies, Two Different Buyers

The two successor businesses soon followed separate ownership paths.

In August 2024, Mars, Incorporated agreed to acquire Kellanova for $83.50 per share in cash, with a stated enterprise value of $35.9 billion. The transaction covered Kellanova’s snacks-led portfolio along with international cereal and noodles, plant-based foods, frozen breakfast, and related businesses.

WK Kellogg Co followed a different path. In July 2025, Ferrero agreed to acquire the North American cereal company for $23.00 per share in cash, representing a stated enterprise value of $3.1 billion.

Ferrero completed its acquisition of WK Kellogg Co on September 26, 2025. WK Kellogg Co became a wholly owned Ferrero subsidiary and its public trading ended.

Mars completed its acquisition of Kellanova on December 11, 2025. Kellanova’s portfolio, including Pringles, Cheez-It, Pop-Tarts, RXBAR, international Kellogg’s cereal brands, and other food businesses, moved into Mars.

These transactions should not be compressed into the statement that one company “bought Kellogg’s.” Ferrero acquired the North American cereal successor, while Mars acquired Kellanova, the continuing Kellogg Company legal lineage containing the global snacks and international cereal businesses.

Where the Kellogg Legacy Stands Now

As of September 1, 2026, there was no single independent public Kellogg Company. Its legacy continued through two principal branches under different owners.

WK Kellogg Co, which contains the core North American cereal business in the United States, Canada, and Caribbean, is owned by Ferrero. Battle Creek remained a key location and was identified as Ferrero’s North America cereal headquarters in the acquisition announcement.

Kellanova is owned by Mars, Incorporated. That branch contains the snacks-led portfolio, international Kellogg’s cereal business, and other food operations that remained with the continuing company after the 2023 separation.

Kellogg’s history runs from health-food experimentation and mass-market cereal commercialization to a diversified food portfolio, a formal corporate split, and two successor businesses under separate ownership. The familiar Kellogg’s name remains connected to cereal, but the corporation that once unified the business no longer exists in its former independent form.

Timeline

This timeline highlights the major milestones that shaped the Kellogg business and its successor companies.

May 31, 1895

John Harvey Kellogg files a patent application documenting a flaked-cereal process.

April 14, 1896

U.S. Patent No. 558,393 is issued to John Harvey Kellogg for a process involving baked, crisp grain flakes.

February 1906

W.K. Kellogg founds the Battle Creek Toasted Corn Flake Company in Battle Creek, Michigan.

1914

Kellogg company history identifies Canada as an early international expansion milestone.

1920

A Michigan Supreme Court decision marks a major point in the Kellogg family trade-name dispute.

1922

The cereal business operates under the Kellogg Company name.

1928

Kellogg Company history dates the launch of Rice Krispies to this year.

1930

W.K. Kellogg establishes the W.K. Kellogg Foundation, a legally separate philanthropic organization.

1964

Pop-Tarts launches, extending Kellogg beyond traditional ready-to-eat cereal into toaster pastries.

1999

Carlos Gutierrez is elevated to CEO amid reported weakness in Kellogg’s U.S. cereal sales and market share.

2000–2001

Kellogg acquires Kashi in 2000 and Keebler Foods Company in 2001, materially broadening its food portfolio.

May 31, 2012

Kellogg completes its acquisition of Pringles for $2.695 billion.

October 2017

Kellogg acquires Chicago Bar Co., the maker of RXBAR, for approximately $600 million.

July 28, 2019

Kellogg completes the sale of selected cookie and related businesses, including Keebler assets, to Ferrero for about $1.3 billion.

October–December 2021

About 1,400 workers at Kellogg’s U.S. cereal plants strike for roughly 11 weeks before approving a new five-year labor agreement.

June 21, 2022

Kellogg announces a plan to separate its businesses, initially proposing three companies.

October 2, 2023

Kellogg Company becomes Kellanova and completes the spin-off of WK Kellogg Co, separating North American cereal from the continuing company.

August 14, 2024

Mars announces an agreement to acquire Kellanova.

July 10, 2025

Ferrero announces an agreement to acquire WK Kellogg Co.

September 26, 2025

Ferrero completes its acquisition of WK Kellogg Co, which becomes a wholly owned Ferrero subsidiary.

December 11, 2025

Mars completes its acquisition of Kellanova.

FAQs

Question: When was Kellogg’s founded?

Answer: Use 1906 as the corporate founding year. W.K. Kellogg founded the Battle Creek Toasted Corn Flake Company that year. Earlier dates refer to cereal development before the company existed.

Question: Who founded Kellogg’s?

Answer: W.K. Kellogg founded the 1906 company. The earlier cereal-development story also involves his brother, Dr. John Harvey Kellogg, whose 1895 patent application documented a flaked-cereal process.

Question: Did W.K. Kellogg invent Corn Flakes by himself?

Answer: The history is more complicated than a single-inventor story. Both brothers were involved in developing flaked cereals, while the patent record names John Harvey Kellogg for the 1895 flaked-cereal process. W.K. Kellogg’s major role was in further development and mass-market commercialization through his own company.

Question: What was Kellogg’s original company name?

Answer: Battle Creek Toasted Corn Flake Company.

Question: When did the business become Kellogg Company?

Answer: The business operated under the Kellogg Company name by 1922.

Question: Which acquisitions most changed Kellogg’s business mix?

Answer: Keebler in 2001 and Pringles in 2012 were two especially important transactions. Keebler broadened Kellogg’s cookies, crackers, and distribution presence, while Pringles materially strengthened its global snacks platform.

Question: Why did Kellogg split in 2023?

Answer: Kellogg said the separation would give the businesses greater strategic, operational, and financial focus. The completed structure separated North American cereal into WK Kellogg Co while the continuing company, renamed Kellanova, retained global snacks, international cereal and noodles, frozen breakfast, plant-based foods, and other businesses.

Question: Is Kellogg Company still an independent company?

Answer: No. Kellogg Company became Kellanova in 2023, while WK Kellogg Co was separately spun off. Ferrero acquired WK Kellogg Co in September 2025, and Mars acquired Kellanova in December 2025.

Question: Who owns Kellogg’s cereal today?

Answer: It depends on geography. WK Kellogg Co’s North American cereal business is owned by Ferrero, while Kellanova’s international Kellogg’s cereal business moved into Mars with the Kellanova acquisition.

Question: Is the W.K. Kellogg Foundation part of Kellogg Company?

Answer: No. The Foundation states that it is legally separate and independently governed.

Sources

• Google Patents: US558393A — Flaked cereals and process of preparing same
• Smithsonian Magazine: The Secret Ingredient in Kellogg’s Corn Flakes Is Seventh-Day Adventism
• Midpage / Michigan Supreme Court decision: Kellogg v. Kellogg Toasted Corn Flake Co.
• Encyclopedia.com: Kellogg Company
• WK Kellogg Co: Our Story & Timeline
• W.K. Kellogg Foundation: Who We Are
• U.S. Securities and Exchange Commission: Keebler acquisition disclosure, Pringles acquisition announcement, RXBAR acquisition disclosure, 2019 Ferrero divestiture disclosure, 2022 separation announcement, 2023 Kellanova name change and spin-off filing, WK Kellogg Co 2023 Form 10-K
• Federal Trade Commission: Kellogg Company / Kashi Company transaction record
• Reuters via Al Jazeera: Kellogg workers approve labour contract, ending 11-week strike
• Associated Press via CityNews Toronto: Kellogg to split into 3; snacks, cereals, plant-based food
• Mars, Incorporated: Mars to acquire Kellanova, Mars completes acquisition of Kellanova
• Ferrero: Ferrero to acquire WK Kellogg Co, Ferrero completes acquisition of WK Kellogg Co
• Pop-Tarts: Pop-Tarts history timeline
• Los Angeles Times: Kellogg to Promote President to CEO Post in April, Earlier Than Expected