Thermo Fisher (TMO) insider trading and SEC filings
THERMO FISHER SCIENTIFIC INC. · NYSE · Measuring & Controlling Devices, NEC
Company facts
What Thermo Fisher tells the SEC about itself on the same registration record these filings come from.
- Industry (SIC) — Measuring & Controlling Devices, NEC
- Exchange — NYSE
- Filer category — Large accelerated filer
- Fiscal year end — December 31
- State of incorporation — Delaware
- Former names — THERMO ELECTRON CORP (1994-2006)
TMO insider transactions
Officers, directors and 10% owners must tell the SEC when they buy or sell Thermo Fisher stock, within two business days. These are the most recent, straight from EDGAR.
I read the 8 insider filings below, filed between Sep 1 and Sep 29, 2026, all on Form 4. Each one is about Thermo Fisher stock and links to the original on EDGAR. They name 8 insiders: 5 directors and 3 officers. Of the filings, 3 report shares withheld for tax. Thermo Fisher's SEC record shows its latest 10-K filed Feb 26, 2026, its latest 10-Q Jul 31, 2026, and its latest 8-K Jul 23, 2026.
| Form | Filed | Insider | Transaction | Price | Trade date | Shares held after | Ownership | |
|---|---|---|---|---|---|---|---|---|
| 4 | 2026-09-29 | WEISLER DION J — Director | not itemised — see the filing | — | — | — | — | Filing |
| 4 | 2026-09-29 | SPERLING SCOTT M — Director | not itemised — see the filing | — | — | — | — | Filing |
| 4 | 2026-09-29 | Lynch Karen S — Director | not itemised — see the filing | — | — | — | — | Filing |
| 4 | 2026-09-29 | Keith R. Alexandra — Director | not itemised — see the filing | — | — | — | — | Filing |
| 4 | 2026-09-29 | JOHNSON JENNIFER M — Director | not itemised — see the filing | — | — | — | — | Filing |
| 4 | 2026-09-01 | CASPER MARC N — Chairman & CEO | Shares withheld for tax or exercise cost · 1,255 shares across 2 transactions | $622.18 | Aug 28, 2026 | 122,668 | Direct | Filing |
| 4 | 2026-09-01 | James Meyer — Sr. Vice President & CFO | Shares withheld for tax or exercise cost · 268 shares across 5 transactions | $622.18 | Aug 28, 2026 | 5,559 | Direct | Filing |
| 4 | 2026-09-01 | Shropshire Thomas B Jr. — SVP and General Counsel | Shares withheld for tax or exercise cost · 49 shares | $622.18 | Aug 28, 2026 | 6,008 | Direct | Filing |
Transaction wording follows the code on the filing itself — what each Form 4 code means. An option exercise or a tax withholding is not a market decision, and is not shown as one.
- Form 4 — An insider bought or sold company stock
Get TMO's filings, read.
Other recent Thermo Fisher filings
| Form | Filed | Document |
|---|---|---|
| 10-Q | 2026-07-31 | 10-Q |
| 8-K | 2026-07-23 | 8-K |
| 8-K | 2026-05-26 | 8-K |
| 10-Q | 2026-05-01 | 10-Q |
| 8-K | 2026-04-23 | 8-K |
| DEF 14A | 2026-04-07 | DEF 14A |
| 8-K | 2026-03-24 | 8-K |
| 10-K | 2026-02-26 | 10-K |
Reading these accurately
A Form 4 records what happened, precisely and on the record — it has no field for why. A sale can be scheduled months in advance under a Rule 10b5-1 plan, and vesting and option exercises appear alongside open-market decisions. The fuller version is in what insider buying and selling actually signals; to look up any other company, use the insider filing tracker.
Insider filings for other companies
Other companies Pip tracks, with their most recent SEC filings.