Cormorant Asset Management’s Altimmune ALT Stock Holding History

Cormorant Asset Management’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	$3.8M	Buy	+1,250,000	New	+$3.73M	0.19%	45
2023 Q1	–	Sell	-2,600,000	Closed	-$42.8M	–	75
2022 Q4	$42.8M	Sell	2,600,000 -842,863	-24%	-$9.47M	2.86%	10
2022 Q3	$44M	Buy	3,442,863 +442,863	+15%	+$6.54M	3.07%	7
2022 Q2	$35.1M	Buy	+3,000,000	New	+$18.5M	2.65%	9

Other funds holding ALT

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 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 Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return

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 Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Cormorant Asset Management's ALT Position: Q2 2026 in Review

Cormorant Asset Management opened a new position in Altimmune (ALT) in Q2 2026: 1,250,000 shares worth $3.8M. The stake represents 0.19% of the portfolio and ranks #45 among its holdings. This is a return to the name: Cormorant Asset Management previously reported a position in ALT as recently as Q4 2022.

Cormorant Asset Management first reported a position in ALT in Q2 2022 and has held it in 4 quarters since. The position peaked at $44M in Q3 2022. 210 funds tracked by Wall St. Rank hold ALT as of Q2 2026.

Cormorant Asset Management held 1,250,000 shares of Altimmune worth $3.8M as of Q2 2026.
Altimmune was a new Cormorant Asset Management position in Q2 2026.
Altimmune made up 0.19% of Cormorant Asset Management's portfolio in Q2 2026, its #45 holding.
Cormorant Asset Management first reported a position in Altimmune in Q2 2022 and has held it in 4 quarters since.
Cormorant Asset Management's Altimmune position peaked at $44M in Q3 2022.
210 funds tracked by Wall St. Rank held Altimmune as of Q2 2026.

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