XT
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XTX Topco’s Altimmune ALT Stock Holding History

XTX Topco’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 		$389K Buy
+128,088
New +$383K 0.01% 2681
2024
Q3 		– Sell
-14,378
Closed -$95.6K – 2048
2024
Q2 		$95.6K Buy
+14,378
New +$106K 0.01% 1424
2023
Q4 		– Sell
-204,998
Closed -$533K – 1545
2023
Q3 		$533K Buy
+204,998
New +$588K 0.09% 360
2023
Q2 		– Sell
-21,271
Closed -$89.8K – 1380
2023
Q1 		$89.8K Buy
+21,271
New +$253K 0.02% 1112
2022
Q2 		– Sell
-19,665
Closed -$120K – 829
2022
Q1 		$120K Buy
19,665
+4,898
+33% +$36.1K 0.05% 485
2021
Q4 		$135K Buy
+14,767
New +$157K 0.08% 419

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

XTX Topco's ALT Position: Q2 2026 in Review

XTX Topco opened a new position in Altimmune (ALT) in Q2 2026: 128,088 shares worth $389K. The stake represents 0.01% of the portfolio and ranks #2681 among its holdings. This is a return to the name: XTX Topco previously reported a position in ALT as recently as Q2 2024.

XTX Topco first reported a position in ALT in Q4 2021 and has held it in 6 quarters since. The position peaked at $533K in Q3 2023. 211 funds tracked by Wall St. Rank hold ALT as of Q2 2026.

  • XTX Topco held 128,088 shares of Altimmune worth $389K as of Q2 2026.
  • Altimmune was a new XTX Topco position in Q2 2026.
  • Altimmune made up 0.01% of XTX Topco's portfolio in Q2 2026, its #2681 holding.
  • XTX Topco first reported a position in Altimmune in Q4 2021 and has held it in 6 quarters since.
  • XTX Topco's Altimmune position peaked at $533K in Q3 2023.
  • 211 funds tracked by Wall St. Rank held Altimmune as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.