InvestorLens

ALT — ALTIMMUNE INC

Public company

Sign in to save4 tracked investors reported this
For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying ALT?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence
75
Institutional Conviction
Mixed · 3 buying vs 1 selling last quarter
52
Macro Tailwind
Macro conditions are mixed for this sector
55
Why? — Evidence & Confidence ▾

Of 4 tracked investors who changed their ALT position last quarter, 3 bought and 1 sold (75% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 55/100 in a Squeeze regime).

Supporting evidence
  • +3 tracked investors added or increased positions last quarter (Andreas Halvorsen, Izzy Englander, Ken Griffin)
  • +4 tracked investors reported holding ALT at their latest filing
  • +Macro Health is 55/100 in a Squeeze regime — historically acceptable for this sectorsource
Contradicting evidence — always shown
  • −1 tracked investor reduced or exited last quarter (1 reduced, 0 sold out)
  • −13F data is disclosed up to 45 days after quarter end — positions may have changed since
Know the limits
  • · 13F disclosure lag (up to 45 days)
  • · Tracked investors are a sample, not the whole market
  • · Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 8/20/2026.

About ALTIMMUNE INC (ALT)

ALTIMMUNE INC (ALT) appears in the most recent 13F filings of 4 tracked institutional investors. The largest disclosed position is held by Andreas Halvorsen (Viking Global Investors), valued at $20M. Across recent filings, tracked investors recorded 5 new positions, 9 increased, 4 reduced, and 2 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in ALT

70
/100
Institutional Accumulation
Added / Increased14
Reduced4
Exited2
BearishBullish
Crowded Trade Score™

How many top investors track ALT

27
/100
Emerging Interest
4investors

A small number of top investors own this.

UndiscoveredCrowded
151015+

ALT Ownership Composition

How ALTIMMUNE INC is held across tracked investor types, based on reported 13F positions.

Dominant Type
Other
55% of tracked value
Institutions
4
tracked investors
Total Reported
$37.2M
combined 13F value
Types2
  • Other54.7%
  • Multi-Strategy / Quant45.3%
Other(1)
54.7%
Multi-Strategy / Quant(3)
45.3%

Tracked investors currently reporting ALT

  • Andreas HalvorsenJun 30, 2026
    Viking Global Investors
    Shares
    6.7M
    Value
    $20.4M
    % Portfolio
    0.06%
  • Izzy EnglanderJun 30, 2026
    Millennium Management
    Shares
    3.3M
    Value
    $10.1M
    % Portfolio
    0.00%
  • Ken GriffinJun 30, 2026
    Citadel Advisors
    Shares
    1.7M
    Value
    $5.3M
    % Portfolio
    0.00%
  • Steve CohenJun 30, 2026
    Point72 Asset Management
    Shares
    486.9K
    Value
    $1.5M
    % Portfolio
    0.00%

Recent activity

Frequently asked questions

How many institutional investors hold ALT?
4 tracked institutional investors disclosed a position in ALT (ALTIMMUNE INC) in their most recent 13F filing.
Who is the largest institutional holder of ALT?
Andreas Halvorsen, Viking Global Investors, holds the largest disclosed position in ALT, valued at $20M.
Did institutional ownership of ALT increase or decrease?
Across recent 13F filings, tracked investors recorded 5 new positions, 9 increased, 4 reduced, and 2 fully exited ALT.
Where does this ALT ownership data come from?
SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.