Marshall Wace
TMO icon

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
Q2 		$1.3M Buy
2,600
+1,500
+136% +$720K ﹤0.01% 2070
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 $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

Marshall Wace's TMO Position: Q2 2026 in Review

Marshall Wace reduced its Thermo Fisher Scientific (TMO) stake by 99% in Q2 2026, selling an estimated $227M and leaving 4,321 shares worth $2.17M. The position accounts for ﹤0.01% of the portfolio, ranked #1818.

Marshall Wace first reported a position in TMO in Q1 2014 and has held it in 35 quarters since. The position peaked at $696M in Q4 2021. 2,620 funds tracked by Wall St. Rank hold TMO as of Q2 2026.

  • Marshall Wace held 4,321 shares of Thermo Fisher Scientific worth $2.17M as of Q2 2026.
  • Marshall Wace sold 472,929 Thermo Fisher Scientific shares in Q2 2026, an estimated $227M.
  • Thermo Fisher Scientific made up ﹤0.01% of Marshall Wace's portfolio in Q2 2026, its #1818 holding.
  • Marshall Wace first reported a position in Thermo Fisher Scientific in Q1 2014 and has held it in 35 quarters since.
  • Marshall Wace's Thermo Fisher Scientific position peaked at $696M in Q4 2021.
  • 2,620 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.