Form 4: Amphastar Pharmaceuticals CEO Jack Y. Zhang Reports Stock Disposals for Tax Obligations

CEO Jack Y. Zhang and related parties report disposals of Amphastar Pharmaceuticals stock to cover tax liabilities from vesting restricted stock units.

Summary

• Jack Y. Zhang, CEO and Chief Scientific Officer of Amphastar Pharmaceuticals, along with related parties, reported transactions involving the company's common stock on March 6, 2025.
• The transactions involved the disposal of shares to satisfy tax liabilities related to the vesting of restricted stock units (RSUs).
• Specifically, 9,645 shares were disposed of at a price of $28.32, resulting in a direct holding of 2,493,156 shares.
• Additionally, 3,069 shares held by Mary Z. Luo were disposed of at the same price, resulting in an indirect holding of 1,099,261 shares.
• The reporting persons and The Bill Luobei Zhang 2004 Irrevocable Trust are the sole owners of Applied Physics and Chemistry Laboratories, Inc., which holds 6,827,679 shares.

Sentiment

Score: 5

Explanation: Neutral sentiment as the filing reflects routine transactions related to executive compensation and tax obligations.

Industry Context

Form 4 filings are standard practice for reporting changes in beneficial ownership by company insiders, providing transparency to investors.

Key Dates