Latest filingSep 01, 2026Most recent Form 4
TMO
THERMO FISHER SCIENTIFIC INC.
NYSEIndustrialsMeasuring & Controlling Devices, NEC
Insider activity for last month from 08/04 to 09/04. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$2.22B21 sells
Net open-market-$2.22B7 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period56transactions
- F · Tax withholding · dominant25 · 45%
- S · Open-market sells21 · 38%
- M · Option exercise10 · 18%
Activity by reported role
A joint filing can contribute to multiple roles108transactions
- Chief executive officer · dominant26 · 24%
- CHAIR26 · 24%
- VP10 · 9%
- COO8 · 7%
- PRES8 · 7%
- CHO7 · 6%
- SV7 · 6%
- Chief financial officer6 · 6%
- CAO4 · 4%
- EVP4 · 4%
- GC1 · 1%
- SVP1 · 1%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (7)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeCasper Marc NCommon Stock · Direct
122,668.741Aug 28, 2026
Pettiti GianlucaCommon Stock · Direct
23,216.14Aug 31, 2026
Britt Lisa P.Common Stock · Direct
14,581.078Aug 28, 2026
Meyer JamesCommon Stock · Direct
5,673.381Aug 28, 2026
Holmes Joseph R.Common Stock · Direct
2,955.7885Aug 28, 2026
Shafer Michael DCommon Stock · Direct
20,431.2376Aug 28, 2026
Casper Marc NStock Option (Right to Buy) · Direct
0Aug 24, 2026
Britt Lisa P.Stock Option (Right to Buy) · Direct
0Aug 19, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 04 → Sep 04
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Top insiders
By absolute net value across the selected period- CN-$12.6M
- BP-$7.0M
- PG-$2.5M
Recent filing activity
Most recent 12 transactions · color = transaction codeFiling detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
TMO transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| TMO | Pettiti Gianluca | PRESCOO | sale10b5-1 | 3.73k | -$229M | S | 0.0% | 09/01 | 08/31 | |
| TMO | Pettiti Gianluca | PRESCOO | sale10b5-1 | 400 | -$24.5M | S | 0.0% | 09/01 | 08/31 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 321 | -$20.1M | S | −0.4% | 08/24 | 08/21 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 2.14k | -$134M | S | −0.4% | 08/24 | 08/21 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 1.79k | -$112M | S | −0.4% | 08/24 | 08/21 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 3.01k | -$188M | S | −0.4% | 08/24 | 08/21 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 2.72k | -$170M | S | −0.4% | 08/24 | 08/21 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 80 | -$5.07M | S | −0.4% | 08/24 | 08/20 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 560 | -$35.4M | S | −0.4% | 08/24 | 08/20 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 1.43k | -$90.3M | S | −0.4% | 08/24 | 08/20 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 1.03k | -$65.2M | S | −0.4% | 08/24 | 08/20 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 1.25k | -$78.7M | S | −0.4% | 08/24 | 08/20 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 2.60k | -$163M | S | −0.4% | 08/24 | 08/20 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 1.31k | -$82.4M | S | −0.4% | 08/24 | 08/20 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 821 | -$51.4M | S | −0.4% | 08/24 | 08/20 | |
| TMO | CASPER MARC N | CHAIRCEO | sale10b5-1 | 909 | -$56.8M | S | −0.4% | 08/24 | 08/20 | |
| TMO | Britt Lisa P. | SVCHO | sale | 11.4k | -$701M | S | −4.3% | 08/20 | 08/19 |
THERMO FISHER SCIENTIFIC INC. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at THERMO FISHER SCIENTIFIC INC.?
CASPER MARC N, Meyer James, Shropshire Thomas B Jr., Shafer Michael D, Holmes Joseph R., Pettiti Gianluca, Britt Lisa P..
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Pettiti Gianluca reported a sale on Aug 31, 2026 valued at $229M. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $22,287,587.10. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.