As of August 28, 2026, Altimmune, Inc. (ALT) has a DilutionWatch DilutionScore of 42/100, rated MEDIUM dilution risk. Altimmune, Inc. has a market capitalization of $593.15M, 194.52M shares outstanding, 176 institutional holders tracked. Stored dilution-related fields include ATM program capacity of $390.00M, 1.59M outstanding warrants.
This page includes automatically generated factual summaries from DilutionWatch data. It is not financial advice, not investment research, and not a recommendation. Do your own research. Read the full disclaimer and terms of service.
Dilution Forecast
☀️
Clear
No significant dilution signals
model est. 9%
💰 Capital Raise
model 18%
• Active ATM program with $390M remaining capacity
Market Data
Market Cap$593.15M
Shares Outstanding194.52M
Float164.20M
Cash$326.28M
Debt$34.74M
Short InterestN/A
Institutional Holdings
QoQ: ↑ 38.4% shares (2026Q1 vs prior)
176 institutional holders · 84.18M shares
#1
BlackRock, Inc.
12.80M shares
#2
VANGUARD CAPITAL MANAGEMENT LLC
11.32M shares
#3
STATE STREET CORP
7.15M shares
Institutional holder totals are aggregated from ownership filings and may use a different share basis or reporting date than public float. They are not a reconciliation against tradeable float.
Short Interest
Short Interest51.94M
Days to Cover11.4
% of Float31.6%
FINRA data as of Jul 31, 2026
Recent SEC Activity
xbrl
XBRL WARRANT
2026-06-30
xbrl
XBRL CONVERTIBLE
2017-12-31
424B5
ATM
2026-04-24
424B5
ATM
2026-04-22
4
INSIDER TRANSACTION
2026-04-06
Full SEC filing analysis available with free account
→
Recent News
No recent news
Factual ALT Dilution Snapshot
Altimmune, Inc. (ALT) has a DilutionScore of 42/100, rated Medium dilution risk. Score date: August 28, 2026.
- Stored ATM program remaining capacity: $390.0M.
- Stored outstanding warrants: 1.6M.
- Recent SEC activity tracked for ALT: xbrl on 2026-06-30; 424B5 on 2026-04-24; 424B5 on 2026-04-22.
This automatically generated snapshot is assembled from stored DilutionWatch data fields and may contain data-source errors or omissions. It is not financial advice, not investment research, and not a recommendation. Do your own research and review the full disclaimer and terms of service.
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