Hudson Bay Capital Management
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Hudson Bay Capital Management’s Thermo Fisher Scientific TMO Stock Holding History

Hudson Bay Capital Management’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
2025
Q3 		– Sell
-10,500
Closed -$4.26M – 1672
2025
Q2 		$4.26M Buy
10,500
+9,100
+650% +$3.8M 0.01% 585
2025
Q1 		$697K Buy
+1,400
New +$758K ﹤0.01% 977
2018
Q2 		– Sell
-25,000
Closed -$5.16M – 974
2018
Q1 		$5.16M Buy
+25,000
New +$5.25M 0.11% 221
2017
Q3 		– Sell
-25,000
Closed -$4.36M – 525
2017
Q2 		$4.36M Hold
25,000
– – 0.09% 211
2017
Q1 		$3.84M Buy
25,000
+16,800
+205% +$2.57M 0.05% 320
2016
Q4 		$1.16M Buy
+8,200
New +$1.21M 0.02% 455

Other funds holding TMO

JSC
J. Stern & Co London, United Kingdom $1.03B AUM 20.71% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
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
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 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
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Hudson Bay Capital Management's TMO Position: Q4 2025 in Review

Hudson Bay Capital Management sold out of Thermo Fisher Scientific (TMO) in Q4 2025, closing a stake of 775 shares — an estimated $376K sold.

Hudson Bay Capital Management first reported a position in TMO in Q3 2013 and held it in 19 quarters. The position peaked at $43.3M in Q1 2018. 2,700 funds tracked by Wall St. Rank hold TMO as of Q4 2025.

  • Hudson Bay Capital Management reported no remaining Thermo Fisher Scientific position as of Q4 2025 after selling out during the quarter.
  • Hudson Bay Capital Management sold 775 Thermo Fisher Scientific shares in Q4 2025, an estimated $376K.
  • Hudson Bay Capital Management first reported a position in Thermo Fisher Scientific in Q3 2013 and held it in 19 quarters.
  • Hudson Bay Capital Management's Thermo Fisher Scientific position peaked at $43.3M in Q1 2018.
  • 2,700 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q4 2025.

Based on Hudson Bay Capital Management's 13F filing for Q4 2025, filed 13 Feb 2026.