Roberts M Scot 4

What Happened

• Roberts M. Scot, Chief Scientific Officer of Altimmune (ALT), had RSUs vest/convert into common stock and participated in the company's ESPP. On 2026-01-30 and 2026-02-02 he converted RSUs totaling 17,050 shares into common stock (9,275 + 7,775), of which 5,188 shares (2,859 + 2,329) were surrendered to cover taxes (received values $16,010 and $12,926). Net from vesting = +11,862 shares. Separately, on 2026-01-31 he purchased 5,567 shares under the ESPP at $3.07 per share for a reported total of $17,091.
• These transactions appear to be routine vesting/tax-withholding and an employee purchase (buy), not an open-market sale.

Key Details

• Transaction dates and entries:
  • 2026-01-30: Conversion/exercise (code M) of 9,275 RSUs -> 9,275 shares acquired; 2,859 shares surrendered for taxes (code F) at $5.60 = $16,010.
  • 2026-01-31: ESPP purchase (code A) of 5,567 shares at $3.07 = $17,091 (ESPP period Aug 1, 2025–Jan 31, 2026; purchase price = 85% of Aug 1, 2025 close).
  • 2026-02-02: Conversion/exercise (code M) of 7,775 RSUs -> 7,775 shares acquired; 2,329 shares surrendered for taxes (code F) at $5.55 = $12,926.
• Net effect from RSU vesting: +11,862 shares (17,050 vested − 5,188 withheld). Total cash value of tax-withheld shares: $28,936.
• Shares owned after the transactions: not specified in the provided filing details.
• Footnotes of note:
  • F1/F5/F6: These are RSUs that vest in substantially equal installments over four years from specified grant dates and have no expiration.
  • F2: Shares were surrendered solely to cover taxes associated with RSU vesting.
  • F3/F4: ESPP purchase at 85% of the Aug 1, 2025 closing price for the Aug 1, 2025–Jan 31, 2026 offering period.
• Filing: Form filed 2026-02-03 covering transactions through 2026-02-02 — appears timely (not marked late).

Context

• The RSU conversions were effectively net-share settlements: RSUs vested, converted to shares, and a portion was surrendered to the company to satisfy tax withholding (common, routine). This is not an open-market sale.
• The ESPP purchase is an actual buy (employee purchase at a discount), which can be interpreted as a modest insider purchase signal but is part of regular employee benefit participation.
• Transaction codes: M = exercise/conversion of derivative (here, RSU vesting/conversion); F = shares surrendered for tax withholding; A = award/grant (ESPP purchase).