Marshall Wace’s Altimmune ALT Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$12.4M Buy
4,017,901
+3,095,124
+335% +$13.1M 0.01% 880
2025
Q4
$3.33M Buy
+922,777
New +$4.02M ﹤0.01% 1336
2025
Q3
Sell
-22,100
Closed -$85.5K 2856
2025
Q2
$85.5K Sell
22,100
-1,146,238
-98% -$6.2M ﹤0.01% 2561
2025
Q1
$5.84M Buy
1,168,338
+1,102,821
+1,683% +$6.99M 0.01% 989
2024
Q4
$472K Buy
+65,517
New +$501K ﹤0.01% 2051
2024
Q1
Sell
-86,132
Closed -$969K 2404
2023
Q4
$969K Sell
86,132
-1,712,608
-95% -$7.15M ﹤0.01% 1488
2023
Q3
$4.68M Sell
1,798,740
-260,550
-13% -$748K 0.01% 890
2023
Q2
$7.27M Buy
2,059,290
+462,160
+29% +$2.07M 0.01% 873
2023
Q1
$6.74M Buy
1,597,130
+357,336
+29% +$4.25M 0.01% 859
2022
Q4
$20.4M Buy
1,239,794
+140,880
+13% +$1.58M 0.05% 444
2022
Q3
$14M Buy
1,098,914
+828,584
+307% +$12.2M 0.03% 634
2022
Q2
$3.16M Buy
+270,330
New +$1.67M 0.01% 1686
2021
Q4
Sell
-478,923
Closed -$5.42M 3828
2021
Q3
$5.42M Sell
478,923
-449,793
-48% -$5.47M 0.02% 891
2021
Q2
$9.15M Buy
+928,716
New +$12.7M 0.04% 524
2021
Q1
Sell
-31,049
Closed -$350K 2435
2020
Q4
$350K Buy
+31,049
New +$366K ﹤0.01% 1611

Other funds holding ALT

Marshall Wace's ALT Position: Q1 2026 in Review

Marshall Wace increased its Altimmune (ALT) stake by 335% in Q1 2026, buying an estimated $13.1M and bringing the position to 4,017,901 shares worth $12.4M. The position accounts for 0.01% of the portfolio, ranked #880.

Marshall Wace first reported a position in ALT in Q4 2020 and has held it in 15 quarters since. The position peaked at $20.4M in Q4 2022. 173 funds tracked by Wall St. Rank hold ALT as of Q1 2026.

  • Marshall Wace held 4,017,901 shares of Altimmune worth $12.4M as of Q1 2026.
  • Marshall Wace bought 3,095,124 Altimmune shares in Q1 2026, an estimated $13.1M.
  • Altimmune made up 0.01% of Marshall Wace's portfolio in Q1 2026, its #880 holding.
  • Marshall Wace first reported a position in Altimmune in Q4 2020 and has held it in 15 quarters since.
  • Marshall Wace's Altimmune position peaked at $20.4M in Q4 2022.
  • 173 funds tracked by Wall St. Rank held Altimmune as of Q1 2026.

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