Castle Hook Partners’s Thermo Fisher Scientific TMO Stock Holding History

Castle Hook Partners’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	$83.2M	Buy	+165,965	New	+$79.7M	0.38%	36
2022 Q2	–	Sell	-23,937	Closed	-$14.1M	–	62
2022 Q1	$14.1M	Sell	23,937 -14,098	-37%	-$8.1M	0.62%	23
2021 Q4	$25.4M	Sell	38,035 -39,606	-51%	-$24.7M	1.1%	14
2021 Q3	$44.4M	Buy	77,641 +28,137	+57%	+$15.4M	1.65%	10
2021 Q2	$25M	Sell	49,504 -39,146	-44%	-$18.5M	1.91%	21
2021 Q1	$40.5M	Sell	88,650 -15,771	-15%	-$7.53M	3.68%	9
2020 Q4	$48.6M	Buy	+104,421	New	+$49M	2.45%	8

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

Castle Hook Partners's TMO Position: Q2 2026 in Review

Castle Hook Partners opened a new position in Thermo Fisher Scientific (TMO) in Q2 2026: 165,965 shares worth $83.2M. The stake represents 0.38% of the portfolio and ranks #36 among its holdings. This is a return to the name: Castle Hook Partners previously reported a position in TMO as recently as Q1 2022.

Castle Hook Partners first reported a position in TMO in Q4 2020 and has held it in 7 quarters since. 2,617 funds tracked by Wall St. Rank hold TMO as of Q2 2026.

Castle Hook Partners held 165,965 shares of Thermo Fisher Scientific worth $83.2M as of Q2 2026.
Thermo Fisher Scientific was a new Castle Hook Partners position in Q2 2026.
Thermo Fisher Scientific made up 0.38% of Castle Hook Partners's portfolio in Q2 2026, its #36 holding.
Castle Hook Partners first reported a position in Thermo Fisher Scientific in Q4 2020 and has held it in 7 quarters since.
2,617 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q2 2026.

Based on Castle Hook Partners's 13F filing for Q2 2026, filed 14 Aug 2026.