Thermo Fisher Scientific Inc. (TMO) Insider Trading
Over the last 3 months, TMO insiders made 0 open-market buys and 15 sales, a net sale of -$3.0M (SEC Form 4). Over the last 6 months, 2021 institutions increased and 2182 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
15
Net (3m)
-$3.0M
Insider trades by month Buys Sells
Oct
Nov
Dec
Feb
Mar
Apr
Context3-month price -7.6%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| May 22, 2026 | Jacks Tylerdirector | Grant | 499 | — |
| May 22, 2026 | JOHNSON JENNIFER Mdirector | Grant | 499 | — |
| May 22, 2026 | Keith R. Alexandradirector | Grant | 499 | — |
| May 22, 2026 | HARRIS C MARTINdirector | Grant | 499 | — |
| May 22, 2026 | Lynch Karen Sdirector | Grant | 499 | — |
| May 22, 2026 | Spar Debora Ldirector | Grant | 499 | — |
| May 22, 2026 | WEISLER DION Jdirector | Grant | 499 | — |
| May 22, 2026 | Chai Nelsondirector | Grant | 499 | — |
| May 22, 2026 | WEISLER DION Jdirector | Tax | 80 | $451.79 |
| May 22, 2026 | SPERLING SCOTT Mdirector | Grant | 499 | — |
| May 22, 2026 | CHANDY RUBY Rdirector | Grant | 499 | — |
| Apr 29, 2026 | Pettiti Gianlucaofficer: President & COO | Sell | 400 | $462.66 |
| Mar 31, 2026 | Lynch Karen Sdirector | Grant | 66 | — |
| Mar 31, 2026 | JOHNSON JENNIFER Mdirector | Grant | 66 | — |
| Mar 31, 2026 | WEISLER DION Jdirector | Grant | 79 | — |
| Mar 31, 2026 | Keith R. Alexandradirector | Grant | 66 | — |
| Mar 31, 2026 | SPERLING SCOTT Mdirector | Grant | 90 | — |
| Mar 12, 2026 | Shafer Michael Dofficer: Executive Vice President | Sell | 1,607 | $499.40 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 99 | $509.66 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 264 | $519.74 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 58 | $507.54 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 20 | $503.66 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 411 | $512.73 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 201 | $516.73 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 570 | $514.71 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 214 | $511.78 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 516 | $519.13 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 348 | $515.64 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 106 | $517.83 |
| Mar 9, 2026 | CASPER MARC Ndirector, officer: Chairman & CEO | Sell | 1,133 | $513.71 |
Source: TMO SEC Form 4 filings, latest May 22, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their TMO positions over the last 6 months (SEC Form 13F).
Increased
2021
New positions
483
Reduced
2182
Sold out
345
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| VANGUARD GROUP INC | Increased | 34.1M | Jan 29, 2026 |
| J. STERN & CO. LLP | Increased | 31.5M | Feb 24, 2026 |
| BLACKROCK, INC. | Increased | 30.7M | Feb 12, 2026 |
| BLACKROCK, INC. | Reduced | 30.4M | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 24.3M | May 15, 2026 |
| STATE STREET CORP | Increased | 16.7M | May 15, 2026 |
| STATE STREET CORP | Increased | 16.6M | Feb 13, 2026 |
| MORGAN STANLEY | Reduced | 11.9M | Feb 13, 2026 |
| CAPITAL WORLD INVESTORS | Increased | 11.0M | Feb 11, 2026 |
| MORGAN STANLEY | Reduced | 10.9M | May 15, 2026 |
| FMR LLC | Increased | 10.8M | May 15, 2026 |
| FMR LLC | Increased | 9.8M | Feb 17, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 8.4M | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 8.2M | Feb 9, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 7.7M | Feb 17, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.