Senator Investment Group’s Thermo Fisher Scientific TMO Stock Holding History

Senator Investment Group’s Portfolio TMO Stock Details TMO Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$50.1M	Buy	+100,000	New	+$48M	1.83%	22
2024 Q4	–	Sell	-60,000	Closed	-$37.1M	–	81
2024 Q3	$37.1M	Sell	60,000 -20,000	-25%	-$11.8M	1.76%	29
2024 Q2	$44.2M	Sell	80,000 -5,000	-6%	-$2.86M	2.16%	18
2024 Q1	$49.4M	Buy	+85,000	New	+$47.7M	2.25%	14
2021 Q4	–	Sell	-125,000	Closed	-$71.4M	–	113
2021 Q3	$71.4M	Buy	+125,000	New	+$68.6M	1.22%	27
2020 Q2	–	Sell	-290,000	Closed	-$82.2M	–	59
2020 Q1	$82.2M	Buy	+290,000	New	+$91.4M	2.98%	15

Other funds holding TMO

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

Senator Investment Group's TMO Position: Q2 2026 in Review

Senator Investment Group opened a new position in Thermo Fisher Scientific (TMO) in Q2 2026: 100,000 shares worth $50.1M. The stake represents 1.83% of the portfolio and ranks #22 among its holdings. This is a return to the name: Senator Investment Group previously reported a position in TMO as recently as Q3 2024.

Senator Investment Group first reported a position in TMO in Q1 2020 and has held it in 6 quarters since. The position peaked at $82.2M in Q1 2020. 2,620 funds tracked by Wall St. Rank hold TMO as of Q2 2026.

Senator Investment Group held 100,000 shares of Thermo Fisher Scientific worth $50.1M as of Q2 2026.
Thermo Fisher Scientific was a new Senator Investment Group position in Q2 2026.
Thermo Fisher Scientific made up 1.83% of Senator Investment Group's portfolio in Q2 2026, its #22 holding.
Senator Investment Group first reported a position in Thermo Fisher Scientific in Q1 2020 and has held it in 6 quarters since.
Senator Investment Group's Thermo Fisher Scientific position peaked at $82.2M in Q1 2020.
2,620 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q2 2026.

Based on Senator Investment Group's 13F filing for Q2 2026, filed 12 Aug 2026.