Jeremy Grantham's ALT Position Overview
Jeremy Grantham (via Grantham, Mayo, Van Otterloo & Co. LLC) currently holds 83,837 shares of Altimmune, Inc. (ALT) worth $254,864, representing 0.00% of the portfolio. First purchased in 2025-Q4, this short-term holding has been held for 3 quarters.
Based on 13F filings, Jeremy Grantham has maintained this position in ALT for several quarters, showing initial confidence in the investment. Largest reduction occurred in Q1 2026, reducing 46,170 shares.
Analysis based on 13F filings available since 2013 Q2
Jeremy Grantham's Altimmune (ALT) Holding Value Over Time
Track share changes against reported price movement
Quarterly Altimmune (ALT) Trades by Jeremy Grantham
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q2 2026 | -42,552 | Reduce 33.67% | 83,837 | $3.04 |
| Q1 2026 | -46,170 | Reduce 26.76% | 126,389 | $3.08 |
| Q4 2025 | +172,559 | New Buy | 172,559 | $3.61 |
Jeremy Grantham's Altimmune Investment FAQs
Jeremy Grantham first purchased Altimmune, Inc. (ALT) in Q4 2025, acquiring 172,559 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Jeremy Grantham has held Altimmune, Inc. (ALT) for 3 quarters since Q4 2025.
Jeremy Grantham's largest addition to Altimmune, Inc. (ALT) was in Q4 2025, adding 172,559 shares worth $622,938.
According to the latest 13F filing for Q2 2026, Jeremy Grantham's firm, Grantham, Mayo, Van Otterloo & Co. LLC, owns 83,837 shares of Altimmune, Inc. (ALT), valued at approximately $254,864.
As of the Q2 2026 filing, Altimmune, Inc. (ALT) represents approximately 0.00% of Jeremy Grantham's publicly disclosed stock portfolio, making it one of their key holdings.
Jeremy Grantham's peak holding in Altimmune, Inc. (ALT) was 172,559 shares, as reported at the end of Q4 2025.