Altimmune

ALT · NASDAQ · Pharmaceutical Preparations

Altimmune (ALT) · oqro.io/stocks/ALT · printed today. Every figure comes from a public filing, linked on the page online. Not investment advice.

How this filing works

SEC Form 13F

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Who owns it (13F)

As of Jun 30, 2026

Institutions reporting a stake, Q2 2026

210

+37 vs Q1 2026

Share of stock reported

77.9%

152M of 195M shares outstanding

Change vs Q1 2026

+82.2M shares

58 new positions, 18 positions closed

Reported in 13F filings, which cover managers over $100M and include double counting. A 13F shows holdings on the last day of the quarter, not when shares were bought or sold. Change counts the 210 managers that reported both quarters.

Largest reported holders, Q2 2026

1BlackRock, Inc. Added (+7.59M shares)20.4M sh · $62M13.4% of reported
2Deep Track Capital, LPNew position19.3M sh · $58.5M12.7% of reported
3State Street Corp Added (+4.95M shares)12.1M sh · $36.8M8.0% of reported
4TCG Crossover Management, LLC New position10M sh · $30.4M6.6% of reported
5Vanguard Capital Management Llc Added (+2.52M shares)8.18M sh · $24.9M5.4% of reported
6Vanguard Portfolio Management Llc Added (+1.95M shares)7.33M sh · $22.3M4.8% of reported
7Marshall Wace, Llp Added (+2.82M shares)6.84M sh · $20.8M4.5% of reported
8Viking Global Investors LpNew position6.7M sh · $20.4M4.4% of reported
9Ra Capital Management, L.P.New position6.5M sh · $19.8M4.3% of reported
10Geode Capital Management, Llc Added (+1.9M shares)5.01M sh · $15.2M3.3% of reported
11Woodline Partners LP New position3.4M sh · $10.3M2.2% of reported
12Millennium Management Llc Added (+51K shares)3.31M sh · $10.1M2.2% of reported
13Nantahala Capital Management, LLC New position3M sh · $9.12M2.0% of reported
14Trails Edge Capital Partners, LP New position2.66M sh · $8.09M1.8% of reported
15Nuveen, LLC Added (+71K shares)2.41M sh · $7.31M1.6% of reported
16Two Sigma Investments, Lp Trimmed (-98K shares)2.38M sh · $7.24M1.6% of reported
17Goldman Sachs Group Inc Added (+864K shares)2.21M sh · $6.73M1.5% of reported
18Great Point Partners Llc New position1.74M sh · $5.29M1.1% of reported
19Northern Trust Corp Added (+603K shares)1.6M sh · $4.86M1.1% of reported
20Weiss Asset Management LPNew position1.53M sh · $4.65M1.0% of reported

Source: SEC Form 13F data sets, every filer, common stock only (options and bonds left out); 3 managers also reported puts and 7 managers calls. Amendments are applied; lines whose value was filed in thousands are scaled, and lines whose shares and value disagree are left out.

Altimmune

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Altimmune

How this filing works

Fund moves · 2

19.3MShares reported

6.7MShares reported

Who owns it (13F)

Largest reported holders, Q2 2026