Companies / Altimmune Inc

Altimmune Inc

Nasdaq: ALTCIK 1326190GAITHERSBURG, MD

Financials ยท FY2025

Revenue$41.0K
Net income$-88.09M
Total debt$35.83M
Cash$63.01M
Diluted EPS$-1.00
Shares outstanding194.5M

Ownership

194.5M shares outstanding ยท as of Aug 7, 2026
0.12%Insiders
Ownership
Insiders0.12%235,100
10%+ / strategic18.88%36,719,952
Institutions29.13%56,658,712
Public float51.87%100,903,937

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 13

View all โ†’
Insider% of sharesShares
Garg Vipin KFormerDirector
0.22%424,519
Roberts M ScotChief Scientific Officer
0.06%112,824
Jordt Raymond MFormerChief Business Officer
0.04%70,107
Durso Jerome BenedictCEOPresident and CEO ยท Director
0.02%47,500
Weaver Gregory LChief Financial Officer
0.02%38,078
Gill JohnDirector
0.01%21,700
Pisano WayneDirector
<0.01%13,498
Sohn Catherine A.Director
<0.01%1,500
Hodges PhilipDirector
โ€”โ€”
Jorkasky DianeDirector
โ€”โ€”

Institutional holders 188

View all โ†’
HolderValue% of shares
BlackRock, Inc.$61.97M10.48%
State Street Corporation$36.78M6.22%
Vanguard Group Inc$34.26M4.88%
Marshall Wace, LLP$12.38M2.07%
Millennium Management LLC$10.04M1.68%
Geode Capital Management, LLC$9.57M1.60%
Two Sigma Investments, LP$7.64M1.27%
Jane Street Group, LLC$6.44M0.92%
Susquehanna International Group, LLP$4.94M0.70%
Morgan Stanley$4.91M0.70%
InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ฮ”Position afterImpact
Jan 27, 2026Garg Vipin K
Director
OtherCommon Stock, par value $0.0001$110.6K-18K
-4.26%
402,450
0.21% of shares
low
Jan 25, 2026Garg Vipin K
Director
OtherCommon Stock, par value $0.0001$98.9K-18K
-4.53%
379,148
0.19% of shares
low
Mar 6, 2026Durso Jerome Benedict
CEO
BuyCommon Stock, par value $0.0001$70.8K+20K
+160.00%
32,500
0.02% of shares
medium
Jan 30, 2026Garg Vipin K
Director
OtherCommon Stock, par value $0.0001$65.1K-12K
-2.71%
417,593
0.21% of shares
low
Apr 1, 2026Durso Jerome Benedict
CEO
BuyCommon Stock, par value $0.0001$47.1K+15K
+46.15%
47,500
0.02% of shares
low
Apr 1, 2026Weaver Gregory L
Executive
BuyCommon Stock, par value $0.0001$31.5K+10K
+35.62%
38,078
0.02% of shares
low
Apr 6, 2026Gill John
Director
BuyCommon Stock, par value $0.0001$31.3K+9K
+73.60%
21,700
0.01% of shares
low
Jan 27, 2026Roberts M Scot
Executive
OtherCommon Stock, par value $0.0001$29.3K-5K
-4.74%
95,395
0.05% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Vanguard Group IncPassive13G/Aโ€”9,491,159โ€”
Vanguard Group IncPassive13G/Aโ€”0โ€”
Viking Global Investors LPPassive13Gโ€”โ€”โ€”
Tang Capital Management, LLCPassive13G/Aโ€”666,022โ€”
Deep Track Capital, LPPassive13Gโ€”19,417,221โ€”
TCG Crossover GP II, LLCPassive13Gโ€”โ€”โ€”
RA Capital Management, L.P.Passive13Gโ€”โ€”โ€”
State Street CorporationPassive13Gโ€”7,145,550โ€”

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
ALTโ€”โ€”02155H200โ€”