Thermo Fisher Scientific Inc. (TMO) has 20 known insider and institutional holders on record. The largest holder is Lagarde Michel with 85,151 shares. Other notable holders include CASPER MARC N and Williamson Stephen.
Over the last 12 months, insiders have made 91 transactions in TMO stock — 41 buys (valued at $37.23M) and 8 sells (valued at $19.81M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
TMO Insider Ownership
Top Holder
Lagarde Michel
85,151 shares
Buys (12 mo)
41
$37.23M value
Sells (12 mo)
8
$19.81M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Lagarde Michel |
Executive Vice President |
85,151 |
2026-03-02 |
|
| 2 |
Casper Marc N |
Chairman & CEO |
40,550 |
2026-03-09 |
|
| 3 |
Williamson Stephen |
Retiring Sr. VP and CFO |
32,499 |
2026-03-02 |
|
| 4 |
Pettiti Gianluca |
President & COO |
25,451 |
2026-03-02 |
|
| 5 |
Shafer Michael D |
Executive Vice President |
20,950 |
2026-03-12 |
|
| 6 |
Sperling Scott M |
Director |
17,592 |
2026-03-31 |
|
| 7 |
Lowery Frederick M. |
Executive Vice President |
15,044 |
2026-03-02 |
|
| 8 |
Chai Nelson |
Director |
14,817 |
2025-05-22 |
|
| 9 |
Manzi Jim P |
Director |
14,807 |
2023-02-07 |
|
| 10 |
Britt Lisa P. |
Sr. VP and Chief HR Officer |
14,784 |
2026-03-02 |
|
| 11 |
Boxer Michael A |
SVP and General Counsel |
10,816 |
2025-03-11 |
|
| 12 |
Sorensen Lars Rebien |
Director |
9,233 |
2024-05-23 |
|
| 13 |
Harris C Martin |
Director |
9,033 |
2025-05-22 |
|
| 14 |
Jacks Tyler |
Director |
8,963 |
2025-05-22 |
|
| 15 |
Shropshire Thomas B Jr. |
SVP and General Counsel |
4,281 |
2026-02-27 |
|
| 16 |
Mullen James C |
Director |
3,393 |
2025-05-22 |
|
| 17 |
Holmes Joseph R. |
VP & Chief Accounting Officer |
2,966 |
2026-03-02 |
|
| 18 |
Chandy Ruby R |
Director |
2,964 |
2025-05-22 |
|
| 19 |
Weisler Dion J |
Director |
2,718 |
2026-03-31 |
|
| 20 |
Spar Debora L |
Director |
2,111 |
2025-05-22 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-28 |
Keith R. Alexandra |
Director |
RSU Award |
66 |
- |
- |
| 2026-03-28 |
Weisler Dion J |
Director |
RSU Award |
79 |
- |
- |
| 2026-03-28 |
Lynch Karen S |
Director |
RSU Award |
66 |
- |
- |
| 2026-03-28 |
Sperling Scott M |
Director |
RSU Award |
90 |
- |
- |
| 2026-03-28 |
Johnson Jennifer M |
Director |
RSU Award |
66 |
- |
- |
| 2026-03-11 |
Shafer Michael D |
Executive Vice President |
Informative Sell |
1,607 |
$499.40 |
$802.54K |
| 2026-03-01 |
Meyer James |
Sr. Vice President & CFO |
Unknown |
6,851 |
$513.68 |
$3.52M |
| 2026-03-05 |
Casper Marc N |
Chairman & CEO |
Option Exercise (Sell) |
4,000 |
$309.63 |
$1.24M |
| 2026-03-04 |
Casper Marc N |
Chairman & CEO |
Option Exercise (Sell) |
5,000 |
$309.63 |
$1.55M |
| 2026-03-03 |
Casper Marc N |
Chairman & CEO |
Option Exercise (Sell) |
5,000 |
$309.63 |
$1.55M |
| 2026-02-28 |
Shafer Michael D |
Executive Vice President |
Tax Withholding of RSU |
252 |
$521.11 |
$131.32K |
| 2026-02-28 |
Pettiti Gianluca |
President & COO |
Tax Withholding of RSU |
332 |
$521.11 |
$173.01K |
| 2026-02-28 |
Holmes Joseph R. |
VP & Chief Accounting Officer |
Tax Withholding of RSU |
4 |
$521.11 |
$2.08K |
| 2026-02-28 |
Lowery Frederick M. |
Executive Vice President |
Tax Withholding of RSU |
264 |
$521.11 |
$137.57K |
| 2026-02-28 |
Britt Lisa P. |
Sr. VP and Chief HR Officer |
Tax Withholding of RSU |
85 |
$521.11 |
$44.29K |
| 2026-02-28 |
Williamson Stephen |
Retiring Sr. VP and CFO |
Tax Withholding of RSU |
247 |
$521.11 |
$128.71K |
| 2026-02-28 |
Lagarde Michel |
Executive Vice President |
Tax Withholding of RSU |
360 |
$521.11 |
$187.6K |
| 2026-02-28 |
Casper Marc N |
Chairman & CEO |
Tax Withholding of RSU |
1,211 |
$521.11 |
$631.06K |
| 2026-02-25 |
Shropshire Thomas B Jr. |
SVP and General Counsel |
RSU Award |
4,281 |
$513.68 |
$2.2M |
| 2026-02-25 |
Shafer Michael D |
Executive Vice President |
RSU Award |
13,698 |
$513.68 |
$7.04M |
| 2026-02-25 |
Pettiti Gianluca |
Executive Vice President |
RSU Award |
16,270 |
$513.68 |
$8.36M |
| 2026-02-25 |
Holmes Joseph R. |
VP & Chief Accounting Officer |
RSU Award |
985 |
$513.68 |
$505.97K |
| 2026-02-25 |
Lowery Frederick M. |
Executive Vice President |
RSU Award |
1,638 |
- |
- |
| 2026-02-25 |
Britt Lisa P. |
Sr. VP and Chief HR Officer |
RSU Award |
5,139 |
$513.68 |
$2.64M |
| 2026-02-25 |
Williamson Stephen |
Sr. VP and CFO |
RSU Award |
1,534 |
- |
- |
