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Thermo Fisher Scientific TMO

Thermo Fisher Scientific is the 46th largest S&P 500 company by market cap, worth $249 billion. 11 directors have filed with the SEC in the last 12 months (who counts), 1 of them an executive. 7 other officers are on file. At 30 Jun 2026, Vanguard was its largest institutional holder, with 9.3% of the company.

Chair and CEO
Marc N. Casper
Sector
Health Care
Sub-industry
Life Sciences Tools & Services
Headquarters
Waltham, Massachusetts
Founded
1902
More
Wikipedia
Market cap
$249B
46th largest, 23 Oct 2026 close
Revenue
$44.6B
Fiscal year 2025
Price to sales
5.6
Market cap over revenue
Employees
125,000
10-K, 31 Dec 2025
Market cap per employee
$2.0M
Market cap over employees
Connections
10
S&P 500 companies sharing a director or officer

Largest institutional holders

Each fund group's share of Thermo Fisher Scientific. Where a company has several share classes, the share is of its total value.

13F filings for the quarter to 30 Jun 2026

These five hold 29.7% of Thermo Fisher Scientific.

Source: SEC Form 13F data sets, SEC XBRL shares outstanding 路 All holders

Board and officers

10 people here also hold roles at other S&P 500 companies.

Roles filed up to 30 Sep 2026

NameTitle
Directors (11)
Marc N. CasperChairman & CEOChairman & CEO
Nelson ChaiDirectorAlso at Chubb LimitedDirector
Ruby R. ChandyDirectorAlso at DuPontDirector
C. Martin HarrisDirectorAlso at Colgate-PalmoliveDirector
Tyler JacksDirectorAlso at AmgenDirector
Jennifer M. JohnsonDirectorAlso at Franklin ResourcesDirector
R. Alexandra KeithDirectorAlso at Procter & GambleDirector
Karen S. LynchDirectorAlso at Automatic Data ProcessingDirector
Debora L. SparDirectorDirector
Scott M. SperlingDirectorDirector
Dion J. WeislerDirectorAlso at IntelDirector
Officers (7)
James MeyerSr. Vice President & CFOLast filed 1 Sep 2026Sr. Vice President & CFO
Lisa P. BrittSr. VP and Chief HR OfficerLast filed 1 Sep 2026Sr. VP and Chief HR Officer
Joseph R. HolmesVP & Chief Accounting OfficerLast filed 1 Sep 2026VP & Chief Accounting Officer
Frederick M. LoweryExecutive Vice PresidentAlso at DuPont and Henry ScheinLast filed 2 Mar 2026Executive Vice President
Gianluca PettitiPresident & COOAlso at HPLast filed 1 Sep 2026President & COO
Michael D. ShaferExecutive Vice PresidentLast filed 1 Sep 2026Executive Vice President
Thomas B. Shropshire Jr.SVP and General CounselLast filed 1 Sep 2026SVP and General Counsel

Source: SEC insider filings (Forms 3, 4 and 5), Thermo Fisher Scientific's Form 4 filings 路 All directors and officers

Companies that share people with Thermo Fisher Scientific

Each person's title here, then at the other company.

  • DuPont DD
    • Frederick M. Lowery: Executive Vice President here, Director there
    • Ruby R. Chandy: Director here, Director there
  • Amgen AMGN
    • Tyler Jacks: Director here, Director there
  • Automatic Data Processing ADP
    • Karen S. Lynch: Director here, Director there
  • Chubb Limited CB
    • Nelson Chai: Director here, Director there
  • Colgate-Palmolive CL
    • C. Martin Harris: Director here, Director there
  • Franklin Resources BEN
    • Jennifer M. Johnson: Director here, Chief Executive Officer there
  • Henry Schein HSIC
    • Frederick M. Lowery: Executive Vice President here, CEO there
  • HP HPQ
    • Gianluca Pettiti: President & COO here, Director there
  • Intel INTC
    • Dion J. Weisler: Director here, Director there
  • Procter & Gamble PG
    • R. Alexandra Keith: Director here, CEO - Beauty there

Source: SEC insider filings 路 See the whole network

Thermo Fisher Scientific's market cap since December 2008

Weekly, up to 23 Oct 2026

Show equal percentage changes as equal steps.
201020122014201620182020202220242026$249B

Source: Yahoo Finance closing prices, SEC XBRL shares outstanding

Workforce

Headcount at 31 Dec 2025

Employees
125,000
As of December 31, 2025, we employed approximately 125,000 colleagues globally, with an approximate regional distribution as follows: 59,000 based in the Americas, 22,000 in the Asia-Pacific region, and 44,000 in Europe, the Middle East and Africa (EMEA).
Thermo Fisher Scientific Form 10-K

Source: Thermo Fisher Scientific Form 10-K

Insider trades

Open-market buys and sales by directors and officers. Grants, option exercises and shares withheld for tax are left out.

Trades from 30 Sep 2025 to 30 Sep 2026

Directors and officers sold $158 million of stock in 31 sales and made no open-market purchases in the 12 months to 30 Sep 2026.

DatePersonTitleTypeSharesValue
31 Aug 2026SaleGianluca PettitiPresident & COOPresident & COOSale4,133$2.5M
24 Aug 2026SaleMarc N. CasperChairman & CEOChairman & CEOSale275$172K
21 Aug 2026SaleMarc N. CasperChairman & CEOChairman & CEOSale10,000$6.3M
20 Aug 2026SaleMarc N. CasperChairman & CEOChairman & CEOSale10,000$6.3M
19 Aug 2026SaleLisa P. BrittSr. VP and Chief HR OfficerSr. VP and Chief HR OfficerSale11,440$7.0M
11 Aug 2026SaleMichael D. ShaferExecutive Vice PresidentExecutive Vice PresidentSale25,500$15M
7 Aug 2026SaleMarc N. CasperChairman & CEOChairman & CEOSale4,883$2.9M
7 Aug 2026SaleJoseph R. HolmesVP & Chief Accounting OfficerVP & Chief Accounting OfficerSale420$246K
6 Aug 2026SaleMarc N. CasperChairman & CEOChairman & CEOSale15,000$8.6M
6 Aug 2026SaleLisa P. BrittSr. VP and Chief HR OfficerSr. VP and Chief HR OfficerSale5,850$3.4M

Showing 10 of 31 trades

Source: SEC insider transactions data sets, Thermo Fisher Scientific's Form 4 filings

Trades by members of Congress and officials

Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.

Trades from 20 Oct 2023 to 20 Oct 2026

28 people disclosed 45 purchases and 45 sales of Thermo Fisher Scientific stock since October 2023.

DateMember or officialTypeAmount
23 Jun 2026Donald J Trump (President)President 路 SoldSale$1,001 to $15,000$1K to $15K
10 Jun 2026Markwayne Mullin (Secretary)Secretary 路 SoldSale$15,001 to $50,000$15K to $50K
18 May 2026Donald J Trump (President)President 路 BoughtPurchase$1,001 to $15,000$1K to $15K
7 May 2026Dwight Evans (House, D-PA)House, D-PA 路 SoldSale$1,001 to $15,000$1K to $15K
28 Apr 2026Donald J Trump (President)President 路 SoldSale$1,001 to $15,000$1K to $15K
27 Apr 2026Donald J Trump (President)President 路 SoldSale$1,001 to $15,000$1K to $15K
17 Apr 2026Donald J Trump (President)President 路 BoughtPurchase$1,001 to $15,000$1K to $15K
13 Apr 2026Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$15,001 to $50,000$15K to $50K
27 Mar 2026Alan Armstrong (Senate, R-OK)Senate, R-OK 路 BoughtPurchase$1,001 to $15,000$1K to $15K
18 Mar 2026Donald J Trump (President)President 路 SoldSale$50,001 to $100,000$50K to $100K

Showing 10 of 90 trades

Source: House, Senate and OGE disclosures via the Congress trading monitor

WARN layoff notices

Notices filed under Thermo Fisher Scientific's own name. Subsidiaries that file under their own names are not included.

Notices from 26 Oct 2023 to 26 Oct 2026

Thermo Fisher Scientific filed 14 notices covering 1,489 workers since October 2023.

NoticePlaceWorkersEffective
13 Aug 2026Franklin, MA1516 Oct 2026
27 Jan 2026Carlsbad, CA17318 Mar 2026
23 Jan 2026Franklin, MA10331 Dec 2026
8 Jan 2026Asheville, NC42331 Dec 2027
29 Apr 2025Orlando, FL5928 Jun 2025
29 Apr 2025Cerritos, CA1128 Jun 2025
31 Jan 2025Cambridge, MA30030 Mar 2025
31 Jan 2025Plainville, MA-30 Mar 2025
7 Nov 2024Lexington, MA1606 Jan 2025
7 Nov 2024Planville, MA-6 Jan 2025

Showing 10 of 14 notices

Source: State WARN notices via the US layoffs tracker