September 25, 2025 · Form 4 insider transaction
Sohn Catherine A. bought 48,800 shares of ALT at $0.00 per share, a transaction worth N/A. The trade was recorded as grant or award and disclosed on an SEC Form 4, filed 4 days after the transaction.
The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following September 25, 2025, subject to the reporting person's continued service through the applicable vesting date.