Amphastar Director Richard K. Prins Receives Equity Awards

What Happened Richard K. Prins, a director of Amphastar Pharmaceuticals (AMPH), received equity awards on June 1, 2026: 8,143 restricted stock units (RSUs) and 17,365 shares tied to a derivative award (option-type award). Both 2026 awards were reported as acquired at $0.00 (no cash paid). The Form 4 also reports a prior gift of 1,500 shares dated August 19, 2024, which was a disposition (gift) recorded at $0.00. Awards do not reflect an open-market purchase or sale; they are compensation/equity grants.

Key Details

• Transactions:
  • 2024-08-19: Gift (G) — 1,500 shares disposed, $0.00.
  • 2026-06-01: Award/Grant (A) — 8,143 RSUs acquired, $0.00.
  • 2026-06-01: Award/Grant (A, derivative) — 17,365 option-type shares acquired, $0.00.
• Vesting/terms: F2 — the RSUs vest on June 1, 2027; F3 — the option-related award vests on June 1, 2027.
• Ownership reporting: F1 — the reported beneficial ownership following the transactions (as of June 1, 2026) was reduced by 4,228 shares to reconcile account records.
• Filing timeliness: The Form 4 was filed June 3, 2026. The June 1, 2026 awards were reported within the Form 4 filing window; the August 19, 2024 gift appears to be reported late (filed many months after the gift date).

Context

• Awards at $0.00 are typical for RSUs and option grants (compensation, not market purchases). The derivative entry represents an award tied to options or similar equity instruments that vest in the future — there is no exercise or sale reported here.
• Gifts are dispositions and do not necessarily indicate insider sentiment about the stock; late reporting of older gifts may reflect administrative delays rather than trading intent.