BlackRock’s Thermo Fisher Scientific TMO Stock Holding History

BlackRock’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
2018 Q3	–	Sell	-18,300	Closed	-$3.79M	–	5084
2018 Q2	$3.79M	Buy	+18,300	New	+$3.88M	﹤0.01%	3561
2018 Q1	–	Sell	-44,000	Closed	-$8.36M	–	5018
2017 Q4	$8.36M	Buy	+44,000	New	+$8.43M	﹤0.01%	3237

Other funds holding TMO

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

BlackRock's TMO Position: Q1 2026 in Review

BlackRock reduced its Thermo Fisher Scientific (TMO) stake by 0.82% in Q1 2026, selling an estimated $136M and leaving 30,427,192 shares worth $15B. The position accounts for 0.26% of the portfolio, ranked #60.

BlackRock first reported a position in TMO in Q2 2013 and has held it in 52 quarters since. The position peaked at $20.7B in Q4 2021. 2,587 funds tracked by Wall St. Rank hold TMO as of Q1 2026.

BlackRock held 30,427,192 shares of Thermo Fisher Scientific worth $15B as of Q1 2026.
BlackRock sold 250,693 Thermo Fisher Scientific shares in Q1 2026, an estimated $136M.
Thermo Fisher Scientific made up 0.26% of BlackRock's portfolio in Q1 2026, its #60 holding.
BlackRock first reported a position in Thermo Fisher Scientific in Q2 2013 and has held it in 52 quarters since.
BlackRock's Thermo Fisher Scientific position peaked at $20.7B in Q4 2021.
2,587 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q1 2026.

Based on BlackRock's 13F filing for Q1 2026, filed 13 May 2026.