Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.
TMO
THERMO FISHER SCIENTIFIC INCData as of 2026 Q1 (03-31) · 13F snapshot
Summary
THERMO FISHER SCIENTIFIC INC (TMO) is held by 18 tracked hedge-fund managers, a combined reported value of ~$3.31B; the largest are Chris Hohn, Andreas Halvorsen, Ken Griffin. This quarter: 1 new, 5 added, 1 trimmed, 1 closed. 20 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · HighThis quarter · Heating up
Gurus holding18
Congress trades20
Price$469.34vs quarter-end-4.51%
Sectors1
This quarter's moves
Top holderChris HohnNew1
Added5
Trimmed / sold2
Chris HohnBig trim
Value $882.07M2.2% of portfolio1,517,6392024 Q1
Andreas HalvorsenBig add
Value $819.88M2.3% of portfolio1,668,0252026 Q1
Ken GriffinAdd
Value $424.92M0.3% of portfolio864,4892026 Q1
Stephen MandelTrim
Value $323.64M3.1% of portfolio587,6962022 Q4
Steven CohenTrim
Value $173.78M0.3% of portfolio353,5412026 Q1
Value $144.31M— of portfolio293,6002026 Q1
Value $97.13M— of portfolio197,6002026 Q1
Value $78.04M1.0% of portfolio490,6052016 Q3
Value $65.52M— of portfolio133,3002026 Q1
David TepperTrim
Value $45.64M0.8% of portfolio187,0002018 Q3
Value $24.23M— of portfolio49,3002026 Q1
Value $9.30M— of portfolio441,4952000 Q2
Value $6.19M— of portfolio12,6002026 Q1
Value $6.19M— of portfolio12,6002026 Q1
Value $2.53M0.1% of portfolio4,5792024 Q2
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Chris Hohn | $882.07M | 2.2% | Big trim |
| Andreas Halvorsen | $819.88M | 2.3% | Big add |
| Ken Griffin | $424.92M | 0.3% | Add |
| Stephen Mandel | $323.64M | 3.1% | Trim |
| Steven Cohen | $173.78M | 0.3% | Trim |
| Ken GriffinCALL | $144.31M | — | — |
| Ken GriffinPUT | $97.13M | — | — |
| Philippe Laffont | $78.04M | 1.0% | New |
| Izzy EnglanderPUT | $65.52M | — | — |
| David Tepper | $45.64M | 0.8% | Trim |
| Izzy EnglanderCALL | $24.23M | — | — |
| Seth Klarman | $9.30M | — | — |
| Steven CohenCALL | $6.19M | — | — |
| Steven CohenPUT | $6.19M | — | — |
| Greenwoods Asset Management | $2.53M | 0.1% | Hold |