TMO THERMO FISHER SCIENTIFIC INC.: institutional ownership and insider trading
2,910 funds reported holding $196B of THERMO FISHER SCIENTIFIC INC. in their latest 13F filings; in Q2 2026 funds net bought $1.74B, with 169 new positions and 153 funds selling out; over the last 12 months insiders bought $0 and sold $148M on the open market.
Famous investors holding TMO
- Larry Robbins (Glenview Capital): $314M, 5.7% of the portfolio
- Andreas Halvorsen (Viking Global Investors): $971M, 2.8% of the portfolio
- Dan Sundheim (D1 Capital Partners): $410M, 1.2% of the portfolio
- Tom Gayner (Markel Group): $36.6M, 0.3% of the portfolio
- Stanley Druckenmiller (Duquesne Family Office): $9.63M, 0.2% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $322M, 0.2% of the portfolio
- Ken Griffin (Citadel Advisors): $565M, 0.1% of the portfolio
- Izzy Englander (Millennium Management): $129M, 0.1% of the portfolio
- Ray Dalio (Bridgewater Associates): $6.49M, 0.0% of the portfolio
- Two Sigma (Two Sigma Investments): $10.8M, 0.0% of the portfolio
Largest institutional holders of TMO
- VANGUARD GROUP INC — $19.8B
- BlackRock, Inc. (BLK) — $15.5B
- VANGUARD CAPITAL MANAGEMENT LLC — $12.2B
- STATE STREET CORP (STT, STT-PG) — $8.44B
- FMR LLC — $7.06B
- MORGAN STANLEY (MS, MS-PA, MS-PE, MS-PF, MS-PI, MS-PK, MS-PL, MS-PO, MS-PP, MS-PQ) — $5.40B
- JPMORGAN CHASE & CO (JPM, AMJB, VYLD, JPM-PC, JPM-PD, JPM-PJ, JPM-PK, JPM-PL, JPM-PM) — $4.31B
- GEODE CAPITAL MANAGEMENT, LLC — $4.18B
- FRANKLIN RESOURCES INC (BEN) — $3.65B
- VANGUARD PORTFOLIO MANAGEMENT LLC — $3.12B
Recent TMO insider trades
- Aug 31, 2026: Pettiti Gianluca sold 4,133 shares ($2.54M)
- Aug 24, 2026: Casper Marc N sold 275 shares ($172K)
- Aug 21, 2026: Casper Marc N sold 20,000 shares ($12.6M)
- Aug 19, 2026: Britt Lisa P. sold 11,440 shares ($7.01M)
Members of Congress trading TMO
- Jul 10, 2026: Dan Newhouse sold $1.00K–$15.0K
- May 7, 2026: Dwight Evans sold part of $1.00K–$15.0K
- Oct 31, 2025: Lisa C. McClain sold $1.00K–$15.0K
- Oct 30, 2025: Lisa C. McClain bought $1.00K–$15.0K
- Oct 30, 2025: Lisa C. McClain sold $1.00K–$15.0K
- Sep 23, 2025: Val T. Hoyle sold $1.00K–$15.0K
- Aug 19, 2025: Kelly Morrison sold part of $1.00K–$15.0K
- Aug 19, 2025: Kelly Morrison sold part of $1.00K–$15.0K
- Aug 19, 2025: Kelly Morrison sold part of $15.0K–$50.0K
- Aug 19, 2025: Kelly Morrison sold part of $15.0K–$50.0K
5%+ owners
- Vanguard Capital Management: 7.5% (Schedule 13G, filed Apr 30, 2026)