Bristol-Myers Squibb vs Pfizer: Founders, CEOs and History
Bristol-Myers Squibb was founded in 1887 by Edward Robinson Squibb, William McLaren Bristol, John Ripley Myers and is led by Christopher Boerner. Pfizer was founded in 1849 by Charles Pfizer, Charles Erhart and is led by Albert Bourla.
Company facts
Bristol-Myers Squibb
- Founded
- 1887
- Headquarters
- Princeton, New Jersey
- Current CEO
- Christopher Boerner
- Employees
- 32,500
Pfizer
- Founded
- 1849
- Headquarters
- New York, New York
- Current CEO
- Albert Bourla
- Employees
- 75,000
Founders
Bristol-Myers Squibb
Edward Robinson Squibb
Squibb resigned his Navy post and opened a small laboratory in Brooklyn in 1858 to make pure ether, chloroform and other medicines.
William McLaren Bristol
In 1887 Bristol and Myers bought the Clinton Pharmaceutical Company of Clinton, New York, reportedly for about $5,000.
John Ripley Myers
Myers and Bristol bought the Clinton Pharmaceutical Company in Clinton, New York, in 1887 and renamed it Bristol, Myers and Company in 1898.
Pfizer
Charles Pfizer
Pfizer possesses a historic, immigrant founding story, rooted entirely in the rapid industrial expansion of 19th-century Brooklyn and defined by an effective, intensely meticulous German chemist and his ambitious confectioner cousin.
Charles Erhart
Charles Erhart's role in Pfizer's founding is less celebrated than his cousin's, partly because the company carries Charles Pfizer's name and partly because his commercial contributions were less visible than the scientific achievements that drove the company'…
CEOs and their tenures
Bristol-Myers Squibb
- Charles A. Heimbold Jr.1994–2001
Chief Executive Officer
Heimbold was CEO from 1994 and chairman from 1995 until May 2001, a period in which Bristol-Myers Squibb roughly doubled its sales and earnings. He later served as U.S. ambassador to Sweden.
Source - Peter R. Dolan2001–2006
Chief Executive Officer
Dolan, who had run the consumer products and medical device divisions, succeeded Charles Heimbold in May 2001. His tenure included the ImClone partnership on the cancer drug Erbitux and a federal investigation into wholesaler inventory practices.
Source - James M. Cornelius2006–2010
Chief Executive Officer
Cornelius took over after Peter Dolan's removal in September 2006 and ran the company until May 2010.
Source - Lamberto Andreotti2010–2015
Chief Executive Officer
Andreotti, previously president and chief operating officer, became CEO on May 4, 2010.
Source - Giovanni Caforio2015–2023
Chief Executive Officer
Caforio, a physician, succeeded Lamberto Andreotti in May 2015. He led the $74 billion Celgene acquisition in 2019, the $13.1 billion MyoKardia deal in 2020 and the $4.1 billion Turning Point deal in 2022, and agreed the Mirati purchase in October 2023.
Source - Chris Boerner2023–present
Board Chair and Chief Executive Officer
Boerner became CEO in November 2023 and board chair on April 1, 2024, after serving as executive vice president, chief operating officer and CEO-designate from April 2023 and earlier as chief commercialization officer.
Source
Pfizer
- Ian Read2010–2018
Chief Executive Officer
Chief executive of Pfizer from 2010 until December 31, 2018; Albert Bourla succeeded him as CEO on January 1, 2019.
Source - Albert Bourla2019–present
Chairman and Chief Executive Officer
A veterinarian by training who joined Pfizer Animal Health in 1993, Bourla became CEO on January 1, 2019 and Chairman in 2020.
Source - Dave Denton2022–2026
Chief Financial Officer
Former CVS Health CFO who ran Pfizer finance through the Seagen financing and cost program, leaving on August 15, 2026 for a consumer goods company.
Source - Chris Boshoff2025–present
Chief Scientific Officer and President, Research & Development
Former Chief Oncology Officer who took over all of Pfizer R&D effective January 1, 2025.
Source - Cecile Guegan2026–present
Interim Chief Financial Officer
Previously senior vice president of finance for Pfizer's global biopharmaceuticals business; became interim CFO after Dave Denton left on August 15, 2026.
Source
Timeline: Bristol-Myers Squibb and Pfizer side by side
1849Pfizer
Pfizer Founded
Charles Pfizer and Charles Erhart founded the company in Brooklyn.
1858Bristol-Myers Squibb
Edward Robinson Squibb opens his Brooklyn laboratory
Navy surgeon Edward Robinson Squibb started making pure ether and other medicines in Brooklyn. The laboratory burned down on Christmas Eve 1858 and reopened in 1859 after local doctors and surgeons contributed $2,100.
1887Bristol-Myers Squibb
Bristol and Myers buy the Clinton Pharmaceutical Company
Hamilton College graduates William McLaren Bristol and John Ripley Myers bought the Clinton Pharmaceutical Company of Clinton, New York, the business that became Bristol-Myers.
1898Bristol-Myers Squibb
Bristol, Myers and Company is named
The founders renamed the business Bristol, Myers and Company in May 1898. After Myers died in 1899 it became Bristol-Myers, which built national brands in Sal Hepatica and, from 1901, Ipana toothpaste.
1944Bristol-Myers Squibb
Penicillin at wartime scale
Squibb opened what was then the world's largest penicillin plant in New Brunswick, New Jersey. Bristol-Myers had bought Cheplin Biological Laboratories in East Syracuse, New York, in 1943 and converted it to penicillin for Allied forces.
1944Pfizer
Penicillin Scale-Up
Pfizer helped industrialize penicillin production during World War II.
1989Bristol-Myers Squibb
Bristol-Myers and Squibb merge
Bristol-Myers and Squibb combined to form Bristol-Myers Squibb, uniting a consumer and pharmaceutical company with a research-led drugmaker.
2000Pfizer
Warner-Lambert Deal
Pfizer acquired Warner-Lambert, adding Lipitor.
2006Bristol-Myers Squibb
CEO Peter Dolan removed over the Plavix deal
After an FBI raid in July 2006 over a patent settlement with generic maker Apotex on the blood thinner Plavix, the federal monitor urged the board to remove CEO Peter Dolan, who stepped down on September 12, 2006.
2009Bristol-Myers Squibb
Medarex bought and Mead Johnson split off
BMS bought Medarex, gaining Yervoy and a share of what became Opdivo, and split off Mead Johnson Nutrition in an exchange offer, completing its shift to a specialty biopharmaceutical company.
2011Bristol-Myers Squibb
FDA approves Yervoy
Yervoy (ipilimumab) became the first drug shown to extend overall survival in advanced melanoma, opening BMS's immuno-oncology franchise.
2012Bristol-Myers Squibb
FDA approves Eliquis
The FDA approved Eliquis (apixaban), developed with Pfizer, in December 2012 for stroke prevention in non-valvular atrial fibrillation. It became BMS's largest product, with $14.4 billion of sales in 2025.
2014Bristol-Myers Squibb
FDA approves Opdivo
The FDA approved the PD-1 inhibitor Opdivo (nivolumab) in December 2014 for advanced melanoma. It reached $10.0 billion of sales in 2025.
2019Bristol-Myers Squibb
Celgene acquisition closes
BMS completed its $74 billion purchase of Celgene on November 20, 2019, adding Revlimid, Pomalyst, Reblozyl and CAR-T programs. Celgene sold Otezla to Amgen for $13.4 billion to win regulatory approval.
2020Bristol-Myers Squibb
MyoKardia deal and a GAAP loss
BMS bought MyoKardia for $13.1 billion, gaining mavacamten (Camzyos). The deal's $11.4 billion in-process R&D charge pushed 2020 to a net loss despite $42.5 billion of revenue.
2020Pfizer
BioNTech COVID Vaccine Partnership
Pfizer and BioNTech brought Comirnaty through emergency authorization.
2022Bristol-Myers Squibb
Turning Point bought as Revlimid generics arrive
BMS completed the $4.1 billion purchase of Turning Point Therapeutics in August 2022 while volume-limited generic lenalidomide began eroding Revlimid, which had peaked at $12.8 billion in 2021.
2023Bristol-Myers Squibb
Chris Boerner becomes CEO
Chris Boerner succeeded Giovanni Caforio as chief executive in November 2023 and became board chair on April 1, 2024. Weeks earlier BMS had agreed to buy Mirati, and in December it agreed to buy Karuna and RayzeBio.
2023Pfizer
Seagen Acquisition
Pfizer completed the $43 billion Seagen acquisition.
2024Bristol-Myers Squibb
Karuna, Mirati and RayzeBio close; Cobenfy approved
The three deals closed between January and March 2024. On September 26, 2024 the FDA approved Cobenfy, the first schizophrenia drug that targets muscarinic rather than dopamine receptors. The Karuna charge produced an $8.9 billion net loss for 2024.
2025Bristol-Myers Squibb
BioNTech partnership, Orbital deal and $48.2B revenue
BMS agreed in June 2025 to co-develop BioNTech's bispecific BNT327 and in October 2025 to buy Orbital Therapeutics for $1.5 billion. Full-year revenue was $48.2 billion with the Growth Portfolio up 17 percent.
2025Pfizer
Chris Boshoff Becomes CSO
Chris Boshoff became Chief Scientific Officer and President, Research & Development effective January 1, 2025.
2025Pfizer
Metsera Acquisition
Pfizer completed its acquisition of obesity drug developer Metsera in November 2025 for up to about $10 billion including CVRs.
2025Pfizer
FY2025 Revenue Base
Pfizer reported $62.579 billion of FY2025 revenue.
2026Bristol-Myers Squibb
Guidance raised and merger reports denied
On July 30, 2026 BMS raised its 2026 revenue guidance to $49.0 to $50.0 billion after second-quarter revenue of $12.97 billion. In August, reports of AstraZeneca merger talks were followed by a senior source telling Reuters there were no discussions.
2026Pfizer
Innovent Oncology Collaboration
Pfizer signed a 12-program cancer collaboration with Innovent Biologics: $650 million upfront and up to $9.85 billion in milestones.
Acquisitions
Bristol-Myers Squibb
- Orbital Therapeutics2025$1.5B
- Mirati Therapeutics2024$4.8B
- RayzeBio2024$4.1B
- Karuna Therapeutics2024$14B
- Turning Point Therapeutics2022$4.1B
- MyoKardia2020$13.1B
Pfizer
- Metsera, Inc.2025$7B
- Seagen Inc.2023$43B
- Medivation Inc.2016$14B
- Wyeth2009$68B
- Pharmacia Corporation2003$60B
- Warner-Lambert Company2000$111B
Questions about Bristol-Myers Squibb vs Pfizer
Who is the CEO of Bristol-Myers Squibb Company and Pfizer Inc.?
Bristol-Myers Squibb Company is led by Christopher Boerner and Pfizer Inc. is led by Albert Bourla. Both serve as the top executive responsible for the company's strategy, operations, and financial performance.
When was Bristol-Myers Squibb Company founded vs Pfizer Inc.?
Pfizer Inc. was founded in 1849 — 38 years before Bristol-Myers Squibb Company, which was founded in 1887. Pfizer Inc.'s longer operating history gives it a deeper track record but also potentially more institutional inertia compared to the younger Bristol-Myers Squibb Company.
How many employees does Bristol-Myers Squibb Company have compared to Pfizer Inc.?
Bristol-Myers Squibb Company employs approximately 32,500 people, while Pfizer Inc. employs approximately 75,000. Pfizer Inc. has the larger workforce at 75,000 employees, compared to Bristol-Myers Squibb Company's 32,500. A higher headcount does not necessarily imply greater efficiency — it often reflects differences in business model (e.g., manufacturing vs. software).
Where are Bristol-Myers Squibb Company and Pfizer Inc. headquartered?
Both Bristol-Myers Squibb Company and Pfizer Inc. are headquartered in United States, meaning they operate under the same primary regulatory and tax environment.
Who founded Bristol-Myers Squibb Company and Pfizer Inc.?
Bristol-Myers Squibb Company was founded by Edward Robinson Squibb, William McLaren Bristol, John Ripley Myers. Pfizer Inc. was founded by Charles Pfizer, Charles Erhart.
Which company has a longer operating history — Bristol-Myers Squibb Company or Pfizer Inc.?
Pfizer Inc. has been operating for approximately 177 years, making it the more established of the two companies. Bristol-Myers Squibb Company has been in operation for around 139 years. A longer operating history often signals greater institutional resilience and brand recognition, though it can also mean slower adaptation to new market conditions.
Figures come from each company's filings and the sources linked beside them. Amounts reported in another currency are shown in US dollars at an approximate rate and marked with ~. Back to the Bristol-Myers Squibb vs Pfizer overview