Thermo Fisher Scientific Inc. (TMO) Insider Ownership

Historic Ownership Trends

According to recent filings covering the 90 days ending December 12, 2025, the three most significant insider holders at Thermo Fisher Scientific are Chairman & CEO Marc N Casper (128.37K shares), Executive Vice President & COO Michel Lagarde (84.12K shares), Sr. VP And Cfo Stephen Williamson (44.56K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Marc N Casper Chairman & CEO 128,370 28 Oct, 2025
Michel Lagarde Executive Vice President & COO 84,117 05 Dec, 2025
Scott M Sperling 68,980 11 Dec, 2025
Mark Stevenson Retiring Executive VP & COO 62,141 01 Mar, 2022
Stephen Williamson Sr. VP And Cfo 44,561 17 Nov, 2025
Syed A. Jafry Sr. Vice President 22,349 01 Mar, 2021
Gianluca Pettiti Executive Vice President 21,152 12 Nov, 2025
Michael D Shafer Executive Vice President 18,731 26 Nov, 2025
Nelson Chai 14,817 22 May, 2025
Jim P Manzi 14,807 07 Feb, 2023
Frederick M. Lowery Executive Vice President 14,367 03 Dec, 2025
Lisa P. Britt Sr. VP And Chief HR Officer 13,087 14 Nov, 2025
Michael A Boxer SVP And General Counsel 10,816 11 Mar, 2025
Thomas J Lynch 10,257 08 Nov, 2021
Lars Rebien Sorensen 9,233 23 May, 2024
C Martin Harris 9,033 22 May, 2025
Tyler Jacks 8,963 22 May, 2025
Thomas B Jr. Shropshire SVP And General Counsel 5,080 03 Dec, 2025
Dion J Weisler 5,028 22 May, 2025
James C Mullen 3,393 22 May, 2025
Ruby R Chandy 2,964 22 May, 2025
Joseph R. Holmes VP & Chief Accounting Officer 2,319 02 Sep, 2025
Debora L Spar 2,111 22 May, 2025
R. Alexandra Keith 2,103 22 May, 2025
Peter E Hornstra VP & Chief Accounting Officer 1,962 01 Mar, 2021
Jennifer M Johnson 904 22 May, 2025
Karen S Lynch 660 22 May, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
10 Dec, 2025 Scott M Sperling Common Stock D 4,386 $0.00 68,980 D G
04 Dec, 2025 Michel Lagarde Common Stock A 18,637 $105.17 84,117 D M
04 Dec, 2025 Michel Lagarde Common Stock A 22,046 $132.66 106,163 D M
04 Dec, 2025 Michel Lagarde Common Stock D 22,046 $563.56 84,117 D S
02 Dec, 2025 Thomas B Jr. Shropshire Common Stock D 337 $580.37 5,080 D F
02 Dec, 2025 Michel Lagarde Common Stock A 36,000 $105.17 59,480 D M
02 Dec, 2025 Michel Lagarde Common Stock D 30,000 $581.92 29,480 D S
03 Dec, 2025 Michel Lagarde Common Stock A 68,000 $105.17 97,480 D M
03 Dec, 2025 Michel Lagarde Common Stock D 29,479 $583.33 68,001 D S
03 Dec, 2025 Michel Lagarde Common Stock D 2,521 $584.11 65,480 D S
01 Dec, 2025 Frederick M. Lowery Common Stock A 6,913 $253.99 21,280 D M
01 Dec, 2025 Frederick M. Lowery Common Stock D 6,913 $597.68 14,367 D S
02 Dec, 2025 Frederick M. Lowery Common Stock A 6,912 $253.99 21,279 D M
02 Dec, 2025 Frederick M. Lowery Common Stock D 6,912 $581.94 14,367 D S
25 Nov, 2025 Michael D Shafer Common Stock A 8,475 $253.99 27,206 D M
25 Nov, 2025 Michael D Shafer Common Stock D 8,475 $600.00 18,731 D S
25 Nov, 2025 Michael D Shafer Common Stock A 2,250 $294.02 20,981 D M
25 Nov, 2025 Michael D Shafer Common Stock D 2,250 $600.00 18,731 D S
14 Nov, 2025 Stephen Williamson Common Stock D 433 $0.00 31,887 D G
13 Nov, 2025 Michel Lagarde Common Stock A 4,638 $253.99 28,118 D M