TMO
Thermo Fisher Scientific Inc
NYSE: TMO · HEALTHCARE · DIAGNOSTICS & RESEARCH
$709.44
+0.75% today
Updated 2026-10-29
Market cap
$255.13B
P/E ratio
37.14
P/S ratio
5.51x
EPS (TTM)
$18.58
Dividend yield
0.26%
52W range
$435 – $704
Volume
2.2M
Thermo Fisher Scientific Inc (TMO) Insider transactions
Net insider activity
Net selling (99,397 shares)
Buy transactions
12
Sell transactions
88
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-26 | WEISLER, DION J | Director | Buy | 56 | — | — |
| 2026-09-26 | SPERLING, SCOTT M | Director | Buy | 63 | — | — |
| 2026-09-26 | LYNCH, KAREN S | Director | Buy | 46 | — | — |
| 2026-09-26 | KEITH, R. ALEXANDRA | Director | Buy | 46 | — | — |
| 2026-09-26 | JOHNSON, JENNIFER M | Director | Buy | 46 | — | — |
| 2026-08-31 | PETTITI, GIANLUCA | President & COO | Sale | 3,733 | — | — |
| 2026-08-31 | PETTITI, GIANLUCA | President & COO | Sale | 3,733 | $614.38 | $2.29M |
| 2026-08-31 | PETTITI, GIANLUCA | President & COO | Sale | 400 | $614.38 | $245752.00 |
| 2026-08-28 | SHROPSHIRE, THOMAS B JR. | SVP and General Counsel | Sale | 49 | $622.18 | $30486.82 |
| 2026-08-28 | SHAFER, MICHAEL D | Executive Vice President | Sale | 227 | $622.18 | $141234.86 |
| 2026-08-28 | SHAFER, MICHAEL D | Executive Vice President | Sale | 211 | $622.18 | $131279.98 |
| 2026-08-28 | SHAFER, MICHAEL D | Executive Vice President | Sale | 190 | $622.18 | $118214.20 |
| 2026-08-28 | SHAFER, MICHAEL D | Executive Vice President | Sale | 162 | $622.18 | $100793.16 |
| 2026-08-28 | PETTITI, GIANLUCA | President & COO | Sale | 304 | $622.18 | $189142.72 |
| 2026-08-28 | PETTITI, GIANLUCA | President & COO | Sale | 270 | $622.18 | $167988.60 |
| 2026-08-28 | PETTITI, GIANLUCA | President & COO | Sale | 249 | $622.18 | $154922.82 |
| 2026-08-28 | PETTITI, GIANLUCA | President & COO | Sale | 212 | $622.18 | $131902.16 |
| 2026-08-28 | MEYER, JAMES | Sr. Vice President & CFO | Sale | 114 | $622.18 | $70928.52 |
| 2026-08-28 | MEYER, JAMES | Sr. Vice President & CFO | Sale | 55 | $622.18 | $34219.90 |
| 2026-08-28 | MEYER, JAMES | Sr. Vice President & CFO | Sale | 44 | $622.18 | $27375.92 |
| 2026-08-28 | MEYER, JAMES | Sr. Vice President & CFO | Sale | 37 | $622.18 | $23020.66 |
| 2026-08-28 | MEYER, JAMES | Sr. Vice President & CFO | Sale | 20 | $622.18 | $12443.60 |
| 2026-08-28 | HOLMES, JOSEPH R. | VP & Chief Accounting Officer | Sale | 15 | $622.18 | $9332.70 |
| 2026-08-28 | HOLMES, JOSEPH R. | VP & Chief Accounting Officer | Sale | 13 | $622.18 | $8088.34 |
| 2026-08-28 | HOLMES, JOSEPH R. | VP & Chief Accounting Officer | Sale | 11 | $622.18 | $6843.98 |
| 2026-08-28 | CASPER, MARC N | Director, Chairman & CEO | Sale | 725 | $622.18 | $451080.50 |
| 2026-08-28 | CASPER, MARC N | Director, Chairman & CEO | Sale | 532 | $622.18 | $330999.76 |
| 2026-08-28 | BRITT, LISA P. | Sr. VP and Chief HR Officer | Sale | 116 | $622.18 | $72172.88 |
| 2026-08-28 | BRITT, LISA P. | Sr. VP and Chief HR Officer | Sale | 105 | $622.18 | $65328.90 |
| 2026-08-28 | BRITT, LISA P. | Sr. VP and Chief HR Officer | Sale | 87 | $622.18 | $54129.66 |
| 2026-08-28 | BRITT, LISA P. | Sr. VP and Chief HR Officer | Sale | 85 | $622.18 | $52885.30 |
| 2026-08-24 | CASPER, MARC N | Director, Chairman & CEO | Sale | 275 | — | — |
| 2026-08-24 | CASPER, MARC N | Director, Chairman & CEO | Buy | 275 | $309.63 | $85148.25 |
| 2026-08-24 | CASPER, MARC N | Director, Chairman & CEO | Sale | 101 | $625.41 | $63166.41 |
| 2026-08-24 | CASPER, MARC N | Director, Chairman & CEO | Sale | 79 | $628.01 | $49612.79 |
| 2026-08-24 | CASPER, MARC N | Director, Chairman & CEO | Sale | 62 | $628.74 | $38981.88 |
| 2026-08-24 | CASPER, MARC N | Director, Chairman & CEO | Sale | 33 | $626.59 | $20677.47 |
| 2026-08-22 | MEYER, JAMES | Sr. Vice President & CFO | Sale | 31 | $629.27 | $19507.37 |
| 2026-08-21 | CASPER, MARC N | Director, Chairman & CEO | Sale | 10,000 | — | — |
| 2026-08-21 | CASPER, MARC N | Director, Chairman & CEO | Buy | 10,000 | $309.63 | $3.10M |
| 2026-08-21 | CASPER, MARC N | Director, Chairman & CEO | Sale | 3,014 | $626.51 | $1.89M |
| 2026-08-21 | CASPER, MARC N | Director, Chairman & CEO | Sale | 2,727 | $625.46 | $1.71M |
| 2026-08-21 | CASPER, MARC N | Director, Chairman & CEO | Sale | 2,147 | $628.61 | $1.35M |
| 2026-08-21 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,791 | $627.39 | $1.12M |
| 2026-08-21 | CASPER, MARC N | Director, Chairman & CEO | Sale | 321 | $629.10 | $201941.10 |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 10,000 | — | — |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Buy | 10,000 | $309.63 | $3.10M |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 2,601 | $628.82 | $1.64M |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,430 | $632.01 | $903774.30 |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,314 | $627.66 | $824745.24 |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,250 | $629.85 | $787312.50 |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,035 | $630.87 | $652950.45 |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 909 | $625.45 | $568534.05 |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 821 | $626.83 | $514627.43 |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 560 | $632.94 | $354446.40 |
| 2026-08-20 | CASPER, MARC N | Director, Chairman & CEO | Sale | 80 | $633.99 | $50719.20 |
| 2026-08-19 | BRITT, LISA P. | Sr. VP and Chief HR Officer | Sale | 11,440 | — | — |
| 2026-08-19 | BRITT, LISA P. | Sr. VP and Chief HR Officer | Buy | 11,440 | $418.32 | $4.79M |
| 2026-08-11 | SHAFER, MICHAEL D | Executive Vice President | Sale | 14,300 | — | — |
| 2026-08-11 | SHAFER, MICHAEL D | Executive Vice President | Sale | 11,200 | — | — |
| 2026-08-11 | SHAFER, MICHAEL D | Executive Vice President | Sale | 14,300 | $600.00 | $8.58M |
| 2026-08-11 | SHAFER, MICHAEL D | Executive Vice President | Sale | 11,200 | $600.00 | $6.72M |
| 2026-08-07 | HOLMES, JOSEPH R. | VP & Chief Accounting Officer | Sale | 420 | — | — |
| 2026-08-07 | HOLMES, JOSEPH R. | VP & Chief Accounting Officer | Buy | 420 | $309.63 | $130044.60 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 275 | — | — |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,035 | $584.41 | $604864.35 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 945 | $586.52 | $554261.40 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 530 | $585.44 | $310283.20 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 522 | $589.52 | $307729.44 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 495 | $590.78 | $292436.10 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 302 | $583.35 | $176171.70 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Buy | 275 | $309.63 | $85148.25 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 228 | $587.64 | $133981.92 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 117 | $593.31 | $69417.27 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 114 | $579.26 | $66035.64 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 113 | $581.85 | $65749.05 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 94 | $577.37 | $54272.78 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 63 | $584.40 | $36817.20 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 58 | $586.53 | $34018.74 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 32 | $589.51 | $18864.32 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 30 | $585.42 | $17562.60 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 29 | $590.77 | $17132.33 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 18 | $583.37 | $10500.66 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 12 | $587.64 | $7051.68 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 7 | $593.32 | $4153.24 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 6 | $577.37 | $3464.22 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 5 | $581.85 | $2909.25 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 4 | $580.71 | $2322.84 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 3 | $580.72 | $1742.16 |
| 2026-08-07 | CASPER, MARC N | Director, Chairman & CEO | Sale | 2 | $581.86 | $1163.72 |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Sale | 10,000 | — | — |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Buy | 10,000 | $309.63 | $3.10M |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Sale | 2,545 | $573.53 | $1.46M |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Sale | 2,164 | $575.46 | $1.25M |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,631 | $572.43 | $933633.33 |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,617 | $574.40 | $928804.80 |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,200 | $573.34 | $688008.00 |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,060 | $575.41 | $609934.60 |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Sale | 1,008 | $574.28 | $578874.24 |
| 2026-08-06 | CASPER, MARC N | Director, Chairman & CEO | Sale | 660 | $572.33 | $377737.80 |
Frequently asked questions
Are TMO insiders buying or selling?
Over the transactions on record, TMO insiders have been net sellers, with about $42.59M in stock sold across 88 sales, against 7 open-market purchases.
Does insider selling at TMO mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which TMO insiders are selling the most?
Recent selling is concentrated in a few names. CASPER, MARC N accounts for the largest share on record, with about $23.13M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.