Marshall Wace
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Marshall Wace’s Thermo Fisher Scientific TMO Stock Holding History

Marshall Wace’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
Q1 		$541K Buy
+1,100
New +$597K ﹤0.01% 2409
2025
Q4 		– Sell
-1,700
Closed -$825K – 3481
2025
Q3 		$825K Buy
+1,700
New +$791K ﹤0.01% 2023
2021
Q4 		– Sell
-31,900
Closed -$18.2M – 4275
2021
Q3 		$18.2M Buy
+31,900
New +$17.5M 0.08% 295

Other funds holding TMO

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Marshall Wace's TMO Position: Q1 2026 in Review

Marshall Wace reduced its Thermo Fisher Scientific (TMO) stake by 50% in Q1 2026, selling an estimated $259M and leaving 477,250 shares worth $235M. The position accounts for 0.23% of the portfolio, ranked #60.

Marshall Wace first reported a position in TMO in Q1 2014 and has held it in 34 quarters since. The position peaked at $696M in Q4 2021. 2,587 funds tracked by Wall St. Rank hold TMO as of Q1 2026.

  • Marshall Wace held 477,250 shares of Thermo Fisher Scientific worth $235M as of Q1 2026.
  • Marshall Wace sold 476,578 Thermo Fisher Scientific shares in Q1 2026, an estimated $259M.
  • Thermo Fisher Scientific made up 0.23% of Marshall Wace's portfolio in Q1 2026, its #60 holding.
  • Marshall Wace first reported a position in Thermo Fisher Scientific in Q1 2014 and has held it in 34 quarters since.
  • Marshall Wace's Thermo Fisher Scientific position peaked at $696M in Q4 2021.
  • 2,587 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.