Stephen Williamson is CFO & VP at THERMO FISHER SCIENTIFIC INC. (TMO). They have made 18 open-market trades across 1 company since 2016, most recently 2026-04-15.
CIK 0001648929
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 18 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TMO | SELL · 10b5-1 | 2025-02-03 | 2025-02-05 | $589.36 | $23.2M | -10.1% | -8.6% | -30.1% |
| TMO | SELL · 10b5-1 | 2024-05-13 | 2024-05-15 | $591.27 | $25.9M | -4.3% | -4.4% | +1.0% |
| TMO | SELL · 10b5-1 | 2023-07-31 | 2023-08-02 | $555.05 | $24.5M | -1.8% | +1.3% | -19.2% |
| TMO | SELL | 2022-08-12 | 2022-08-16 | $602.74 | $25.6M | -5.6% | -7.5% | -10.4% |
| TMO | SELL | 2021-11-02 | 2021-11-03 | $638.05 | $28.1M | -1.6% | -1.0% | -7.5% |
| TMO | SELL | 2020-07-29 | 2020-07-31 | $410.83 | $8.1M | -0.5% | +2.6% | +12.8% |
| TMO | SELL | 2020-06-01 | 2020-06-02 | $348.00 | $870K | -3.3% | +4.1% | +22.1% |
| TMO | SELL | 2020-03-04 | 2020-03-05 | $318.54 | $2.8M | -2.9% | -0.3% | +13.8% |
| TMO | SELL | 2020-03-02 | 2020-03-04 | $291.03 | $1.5M | -12.3% | -11.4% | +9.9% |
| TMO | SELL | 2020-02-03 | 2020-02-05 | $319.13 | $2.1M | +1.2% | -6.6% | +0.9% |
| TMO | SELL | 2019-06-03 | 2019-06-04 | $268.29 | $671K | +4.9% | +10.6% | +4.3% |
| TMO | SELL | 2019-03-04 | 2019-03-05 | $266.00 | $665K | +3.6% | +8.3% | +4.4% |
| TMO | SELL | 2018-12-07 | 2018-12-11 | $241.45 | $2.3M | -10.8% | -1.3% | +5.1% |
| TMO | SELL | 2018-06-04 | 2018-06-04 | $212.00 | $530K | +1.3% | -3.0% | +10.4% |
| TMO | SELL | 2018-03-05 | 2018-03-06 | $204.60 | $512K | +1.5% | +2.2% | +3.3% |
| TMO | SELL | 2018-02-07 | 2018-02-08 | $209.26 | $1.0M | +4.6% | +8.5% | +4.1% |
| TMO | SELL | 2017-06-05 | 2017-06-06 | $176.26 | $441K | -0.7% | -0.6% | +5.6% |
| TMO | SELL | 2017-03-06 | 2017-03-08 | $158.71 | $397K | -0.6% | -2.9% | +11.6% |
| TMO | SELL | 2016-05-24 | 2016-05-26 | $150.20 | $336K | +1.7% | -7.0% | -0.2% |
| TMO | SELL | 2016-05-24 | 2016-05-26 | $150.29 | $1.3M | +1.7% | -7.0% | -0.2% |
| TMO | SELL | 2016-03-21 | 2016-03-23 | $139.50 | $1.5M | +2.3% | +6.3% | +7.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.