TS
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Thomas Steyer’s Altimmune ALT Stock Holding History

Thomas Steyer’s Portfolio ALT Stock Details ALT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-27,600
Closed -$85K – 94
2026
Q1 		$85K Hold
27,600
– – ﹤0.01% 163
2025
Q4 		$99.6K Hold
27,600
– – ﹤0.01% 146
2025
Q3 		$104K Hold
27,600
– – ﹤0.01% 135
2025
Q2 		$107K Hold
27,600
– – ﹤0.01% 129
2025
Q1 		$138K Hold
27,600
– – ﹤0.01% 129
2024
Q4 		$199K Hold
27,600
– – ﹤0.01% 130
2024
Q3 		$169K Hold
27,600
– – ﹤0.01% 147
2024
Q2 		$184K Sell
27,600
-442,400
-94% -$3.26M ﹤0.01% 143
2024
Q1 		$4.78M Buy
470,000
+436,000
+1,282% +$4.43M 0.02% 102
2023
Q4 		$383K Buy
+34,000
New +$142K ﹤0.01% 114

Other funds holding ALT

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
TCM
TCG Crossover Management Palo Alto, California $4.16B AUM 983.43% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.1B AUM 21.36% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Thomas Steyer's ALT Position: Q2 2026 in Review

Thomas Steyer sold out of Altimmune (ALT) in Q2 2026, closing a stake of 27,600 shares — an estimated $85K sold.

Thomas Steyer first reported a position in ALT in Q4 2023 and held it in 10 quarters. The position peaked at $4.78M in Q1 2024. 209 funds tracked by Wall St. Rank hold ALT as of Q2 2026.

  • Thomas Steyer reported no remaining Altimmune position as of Q2 2026 after selling out during the quarter.
  • Thomas Steyer sold 27,600 Altimmune shares in Q2 2026, an estimated $85K.
  • Thomas Steyer first reported a position in Altimmune in Q4 2023 and held it in 10 quarters.
  • Thomas Steyer's Altimmune position peaked at $4.78M in Q1 2024.
  • 209 funds tracked by Wall St. Rank held Altimmune as of Q2 2026.

Based on Farallon Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.