Altimmune, Inc.

ALTNASDAQ

$2.74-0.03 (-0.91%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Altimmune, Inc. price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (-30.4%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	10.48%	$62M	0.00%	Not reported
Deep Track Capital, LP	9.90%	$58.5M	0.85%	New Not reported
State Street Corp	6.22%	$36.8M	0.00%	Not reported
TCG Crossover Management, LLC	5.14%	$30.4M	0.73%	New Not reported
Vanguard Capital Management LLC	4.21%	$24.9M	0.00%	Not reported
Vanguard Portfolio Management LLC	3.77%	$22.3M	0.00%	Not reported
Marshall Wace, LLP	3.52%	$20.8M	0.02%	Not reported
Viking Global Investors LP	3.45%	$20.4M	0.06%	New Not reported
Ra Capital Management, L.P.	3.34%	$19.8M	0.17%	New Not reported
Geode Capital Management, LLC	2.58%	$15.2M	0.00%	Not reported
Woodline Partners LP	1.75%	$10.3M	0.03%	Not reported
Millennium Management LLC	1.70%	$10.1M	0.00%	Not reported
Nantahala Capital Management, LLC	1.54%	$9.12M	0.15%	New Not reported
Trails Edge Capital Partners, LP	1.37%	$8.09M	1.28%	New Not reported
Nuveen, LLC	1.24%	$7.31M	0.00%	Not reported
Two Sigma Investments, LP	1.22%	$7.24M	0.01%	Not reported
Goldman Sachs Group Inc	1.14%	$6.73M	0.00%	Not reported
Great Point Partners LLC	0.90%	$5.29M	1.00%	New Not reported
Northern Trust Corp	0.82%	$4.86M	0.00%	Not reported
Weiss Asset Management LP	0.79%	$4.65M	0.05%	New Not reported
Vanguard Fiduciary Trust Co	0.66%	$3.93M	0.00%	Not reported
Cormorant Asset Management, LP	0.64%	$3.8M	0.19%	New Not reported
AQR Capital Management LLC	0.63%	$3.71M	0.00%	Not reported
Citadel Advisors LLC	0.51%	$2.99M	0.00%	Not reported
UBS Group AG	0.45%	$2.63M	0.00%	Not reported
Morgan Stanley	0.39%	$2.31M	0.00%	Not reported
Bank of America Corp	0.39%	$2.3M	0.00%	Not reported
Ghisallo Capital Management LLC	0.39%	$2.28M	0.04%	Not reported
FMR LLC	0.39%	$2.28M	0.00%	Not reported
Susquehanna International Group, LLP	0.38%	$2.22M	0.00%	Not reported
Bank of New York Mellon Corp	0.35%	$2.1M	0.00%	Not reported
Tang Capital Management LLC	0.34%	$2.02M	0.09%	Not reported
Dimensional Fund Advisors LP	0.33%	$1.94M	0.00%	Not reported
Charles Schwab Investment Management Inc	0.32%	$1.9M	0.00%	Not reported
Hennion & Walsh Asset Management, Inc.	0.27%	$1.58M	0.05%	Add 156.55%
Point72 Asset Management, L.P.	0.25%	$1.48M	0.00%	Not reported
Rock Springs Capital Management LP	0.24%	$1.43M	0.07%	New Not reported
Beirne Wealth Consulting Services, LLC	0.22%	$1.28M	0.26%	Add 2.43%
Wellington Management Group LLP	0.22%	$1.28M	0.00%	Add 69.37%
BNP Paribas Financial Markets	0.19%	$1.13M	0.00%	Not reported
Barclays PLC	0.18%	$1.07M	0.00%	Not reported
Invesco Ltd.	0.17%	$1.01M	0.00%	Not reported
Rhumbline Advisers	0.16%	$941K	0.00%	Not reported
Citigroup Inc	0.15%	$894K	0.00%	Not reported
Steward Partners Investment Advisory, LLC	0.14%	$811K	0.00%	Not reported
Mangrove Partners Im, LLC	0.12%	$727K	0.05%	Not reported
Baird Financial Group, Inc.	0.12%	$722K	0.00%	Not reported
Brown Wealth Management, LLC	0.12%	$718K	0.16%	Not reported
Rafferty Asset Management, LLC	0.12%	$684K	0.00%	Reduce 2.69%
Creative Planning	0.11%	$664K	0.00%	Not reported

50 of 198 holders

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