Bayer vs Berkshire Hathaway: Founders, CEOs and History

Company facts

Founders

CEOs and their tenures

Timeline: Bayer and Berkshire Hathaway side by side

1. 1839Berkshire Hathaway

   Valley Falls Company Founded

   Oliver Chace founds the Valley Falls Company in Valley Falls, Rhode Island, as a cotton textile manufacturer. Chace had learned the trade working with Samuel Slater and built his first mill in 1806.

2. 1863Bayer

   Bayer Founded in Barmen, Germany

   Friedrich Bayer and Johann Friedrich Weskott entered Friedrich Bayer et. Compagnie into the commercial register in Barmen, Germany, on August 1, 1863, to make synthetic fuchsine and aniline dyes for the textile industry using the new coal-tar chemistry.

3. 1898Bayer

   Heroin Marketed as a Cough Suppressant

   Bayer began selling diacetylmorphine under the trademark Heroin as a cough suppressant and a supposedly non-addictive substitute for morphine. It stayed in Bayer's range until after World War I, long after its addictiveness was understood.

4. 1899Bayer

   Aspirin Registered as a Trademark

   The Bayer chemist Felix Hoffmann had synthesized acetylsalicylic acid in a stable, pure form in 1897, and Bayer registered the trademark Aspirin on March 6, 1899. It became the first mass-market synthetic medicine and is still one of the most widely used.

5. 1903Bayer

   Veronal Barbiturate Sleep Aid Launched

   Bayer licensed diethylbarbituric acid from Emil Fischer and Joseph von Mering and sold it as Veronal, the first barbiturate sleep aid.

6. 1912Bayer

   Headquarters Moved to Leverkusen

   Under Carl Duisberg, Bayer moved its main chemical plant and head office to Leverkusen on the Rhine, building one of the largest industrial chemical sites in Europe. Leverkusen is still the group headquarters.

7. 1918Bayer

   US Assets Confiscated During World War I

   Bayer's US assets and trademarks, including the Aspirin trademark, were confiscated by the Alien Property Custodian and sold to Sterling Products. Bayer lost its largest export market and the right to its own name in North America for decades.

8. 1925Bayer

   Merger into IG Farben

   Bayer merged with BASF, Hoechst, Agfa and other German chemical companies to form IG Farbenindustrie AG, then the largest chemical and pharmaceutical group in the world. IG Farben's role in the Nazi war effort led the Allies to dissolve it after World War II.

9. 1932Bayer

   Prontosil Discovered by Gerhard Domagk

   Gerhard Domagk, leading a research team in the Bayer laboratories, developed Prontosil, the first sulfonamide antibacterial and the forerunner of modern antibiotics. He was awarded the Nobel Prize in Physiology or Medicine in 1939 for the work.

10. 1951Bayer

    Re-established After the IG Farben Dissolution

    Bayer was reincorporated as Farbenfabriken Bayer AG in 1951 after the Allied dissolution of IG Farben and rebuilt as an independent chemical and pharmaceutical company during West Germany's post-war recovery.

11. 1955Berkshire Hathaway

    Berkshire Fine Spinning and Hathaway Manufacturing Merge

    Berkshire Fine Spinning Associates and Hathaway Manufacturing combine and take the Berkshire Hathaway name.

12. 1962Berkshire Hathaway

    Buffett Partnership Buys Its First Berkshire Shares

    Buffett Partnership Ltd. buys its first Berkshire Hathaway shares in December 1962. Buffett was drawn to the pattern of Berkshire closing plants and using the liquidation proceeds to repurchase its own stock.

13. 1964Berkshire Hathaway

    Tender Offer Dispute With Seabury Stanton

    Berkshire president Seabury Stanton asks Buffett at what price Buffett Partnership would sell, agrees to $11.50 a share, then mails a tender offer at $11.375.

14. 1965Berkshire Hathaway

    Buffett Takes Control and Names Ken Chace President

    Buffett Partnership takes control of Berkshire Hathaway in May 1965 and Stanton leaves. Buffett selects Ken Chace, a long-time employee, as president to run the textile operation, and the cash it generates is pointed at other industries.

15. 1967Berkshire Hathaway

    Entry Into Insurance With National Indemnity

    Early in 1967 Berkshire pays $8.6 million to buy National Indemnity Company and a small sister insurer from owner Jack Ringwalt.

16. 1972Berkshire Hathaway

    See's Candies Bought for $25 Million

    Blue Chip Stamps, controlled by Buffett and Munger and later merged into Berkshire, buys See's Candies for $25 million.

17. 1985Berkshire Hathaway

    Textile Operations Closed

    Buffett decides in July 1985 to close Berkshire's textile operation and the shutdown is largely complete by year end. He described it as finally throwing in the towel after twenty years of unremitting struggle with the business.

18. 1994Bayer

    US Bayer Trademark Rights Reclaimed

    Bayer bought Sterling Winthrop's over-the-counter drug business from SmithKline Beecham for about USD 1 billion, recovering the US and Canadian rights to the Bayer name and the Bayer Cross confiscated in 1918, plus the Aspirin trademark in Canada.

19. 1996Berkshire Hathaway

    GEICO Becomes Wholly Owned and Class B Shares Created

    Berkshire buys the remaining 49% of GEICO on January 2, 1996, having held 51%, and GEICO becomes a wholly owned subsidiary. Shareholders also approve a recapitalization creating Class B shares with the economic rights of one thirtieth of a Class A share.

20. 1998Berkshire Hathaway

    General Re and Executive Jet Acquired

    Berkshire acquires reinsurer General Re and fractional-aircraft operator Executive Jet.

21. 2001Bayer

    Baycol Withdrawn Worldwide

    Bayer voluntarily withdrew its cholesterol drug Baycol, sold as Lipobay outside the United States, in August 2001 after cases of fatal rhabdomyolysis, particularly at higher doses and in combination with gemfibrozil.

22. 2006Bayer

    Schering AG Acquired for About EUR 17 Billion

    Bayer acquired Schering AG of Berlin for about $19.2 billion (EUR 17 billion) after counter-bidding against a hostile approach from Merck KGaA, adding the Mirena contraceptive franchise, oncology assets and a European pharmaceutical sales force.

23. 2010Berkshire Hathaway

    BNSF Railway Acquired

    Berkshire completes its purchase of Burlington Northern Santa Fe in the first quarter of 2010.

24. 2014Bayer

    Merck Consumer Care Acquired for USD 14.2 Billion

    Bayer closed the purchase of the consumer care business of Merck and Co. on October 1, 2014 for USD 14.2 billion in cash, adding Claritin, Coppertone and Dr. Scholl's and making Bayer one of the largest non-prescription medicine companies in the world.

25. 2015Bayer

    Covestro Spin-off

    Bayer listed its materials science division as Covestro through an IPO on the Frankfurt Stock Exchange, ending its presence in plastics and polymers and leaving a group focused on pharmaceuticals, consumer health and crop science.

26. 2016Berkshire Hathaway

    Precision Castparts Acquired

    Berkshire completes the purchase of Precision Castparts, an aerospace and industrial components maker, for $235 a share in cash.

27. 2018Bayer

    Monsanto Acquisition Completed for About USD 63 Billion

    Bayer completed the acquisition of Monsanto on June 7, 2018, paying USD 128 per share, about USD 63 billion in total, the largest foreign acquisition by a German company.

28. 2018Berkshire Hathaway

    Abel and Jain Named Vice Chairmen

    Berkshire's board expands from twelve to fourteen directors and elects Greg Abel and Ajit Jain.

29. 2020Bayer

    USD 10.9 Billion Roundup Settlement

    Bayer agreed to pay about USD 10.9 billion to settle roughly 113,000 Roundup claims while continuing to maintain that glyphosate does not cause cancer. The programme did not end the litigation and new claims kept arriving.

30. 2022Berkshire Hathaway

    Alleghany Corporation Acquired

    Berkshire completes the acquisition of insurer Alleghany Corporation on October 19, 2022, paying $848.02 a share in cash for a total equity value of about $11.6 billion and adding the TransRe reinsurance business.

31. 2023Bayer

    Bill Anderson Becomes CEO

    Werner Baumann retired at the end of May 2023 after 35 years at Bayer. Bill Anderson, previously head of Roche's pharmaceuticals division and of Genentech, joined the Board of Management in April and became CEO on June 1, 2023.

32. 2024Bayer

    Dynamic Shared Ownership Rolled Out

    Bayer began introducing the Dynamic Shared Ownership operating model, replacing layers of middle management with self-directed teams.

33. 2024Berkshire Hathaway

    Market Value Tops $1 Trillion

    Berkshire's market capitalization passes $1 trillion on August 28, 2024, making it the first US company outside the technology sector to reach that level.

34. 2024Berkshire Hathaway

    Pilot Travel Centers Fully Owned

    Berkshire acquires the remaining 20% of Pilot Travel Centers on January 16, 2024 and takes full ownership. It had bought 38.6% in 2017 and a further 41.4% for about $8.2 billion in January 2023.

35. 2025Bayer

    Nubeqa Approved in the US for Metastatic Castration-Sensitive Prostate Cancer

    The FDA approved Nubeqa (darolutamide) in June 2025 for metastatic castration-sensitive prostate cancer, a third indication, followed by EU authorization in July 2025.

36. 2025Berkshire Hathaway

    Board Approves Abel as CEO From January 2026

    Berkshire announces in May 2025 that Greg Abel will become President and Chief Executive Officer on January 1, 2026, with Warren Buffett remaining Chairman of the Board.

37. 2026Bayer

    Supreme Court Preemption Ruling and Proposed USD 7.25 Billion Roundup Class Settlement

    In February 2026 Monsanto proposed a US nationwide class settlement funded by declining annual payments of up to USD 7.25 billion over as long as 21 years, which received preliminary approval in March 2026.

38. 2026Berkshire Hathaway

    Abel Becomes CEO and Buffett Becomes Chairman Emeritus

    Abel takes over as CEO on January 1, 2026 and Berkshire completes the $9.7 billion purchase of OxyChem from Occidental on January 2. On September 18, 2026 Buffett is named Chairman Emeritus and remains a director, and his son Howard G.

Acquisitions

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