Wellington Management Group’s Altimmune ALT Stock Holding History

Wellington Management Group’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	$1.28M	Buy	420,300 +172,142	+69%	+$514K	﹤0.01%	1705
2026 Q1	$764K	Sell	248,158 -9,113	-4%	-$38.7K	﹤0.01%	1721
2025 Q4	$929K	Sell	257,271 -7,531	-3%	-$32.8K	﹤0.01%	1725
2025 Q3	$998K	Buy	264,802 +12,936	+5%	+$49.9K	﹤0.01%	1779
2025 Q2	$975K	Buy	251,866 +26,912	+12%	+$146K	﹤0.01%	1728
2025 Q1	$1.12M	Buy	224,954 +19,721	+10%	+$125K	﹤0.01%	1680
2024 Q4	$1.48M	Buy	205,233 +8,001	+4%	+$61.1K	﹤0.01%	1646
2024 Q3	$1.21M	Buy	197,232 +42,553	+28%	+$288K	﹤0.01%	1673
2024 Q2	$1.03M	Sell	154,679 -2,235	-1%	-$16.5K	﹤0.01%	1665
2024 Q1	$1.6M	Buy	+156,914	New	+$1.6M	﹤0.01%	1577
2017 Q1	–	Sell	-160	Closed	-$156K	–	2235
2016 Q4	$156K	Buy	+160	New	+$143K	﹤0.01%	2152

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

Wellington Management Group's ALT Position: Q2 2026 in Review

Wellington Management Group increased its Altimmune (ALT) stake by 69% in Q2 2026, buying an estimated $514K and bringing the position to 420,300 shares worth $1.28M. The position accounts for ﹤0.01% of the portfolio, ranked #1705.

Wellington Management Group first reported a position in ALT in Q4 2016 and has held it in 11 quarters since. The position peaked at $1.6M in Q1 2024. 210 funds tracked by Wall St. Rank hold ALT as of Q2 2026.

Wellington Management Group held 420,300 shares of Altimmune worth $1.28M as of Q2 2026.
Wellington Management Group bought 172,142 Altimmune shares in Q2 2026, an estimated $514K.
Altimmune made up ﹤0.01% of Wellington Management Group's portfolio in Q2 2026, its #1705 holding.
Wellington Management Group first reported a position in Altimmune in Q4 2016 and has held it in 11 quarters since.
Wellington Management Group's Altimmune position peaked at $1.6M in Q1 2024.
210 funds tracked by Wall St. Rank held Altimmune as of Q2 2026.

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