Form 4: Amphastar Exec Sells Shares for Tax Obligations

Amphastar Pharmaceuticals EVP Liawatidewi Yakob disposed of 1,033 shares of common stock to cover tax liabilities from restricted stock unit vesting.

Summary

• Liawatidewi Yakob, EVP Corporate Administration Center and a Director at Amphastar Pharmaceuticals, Inc. (AMPH), reported a transaction.
• On March 15, 2026, Yakob disposed of 1,033 shares of Amphastar Common Stock.
• The shares were disposed of at a price of $18.18 per share.
• This disposition was a 'tax withholding' transaction (Code F), where shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units (RSUs).
• Following this transaction, Liawatidewi Yakob directly beneficially owns 121,892 shares of Common Stock.
• Additionally, 2,459 shares are indirectly beneficially owned through the Yakob and Sunmoon Trust dated July 25, 2013, for which Yakob serves as a trustee.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this filing as neutral. It reports a routine insider transaction for tax purposes related to RSU vesting, which does not reflect a change in the company's operational or financial outlook.

Future Outlook

The filing does not contain any forward-looking statements or guidance regarding the company's future performance or strategic direction.

Industry Context

StockSavvy.ai notes that insider transactions, particularly those involving the disposition of shares to cover tax liabilities upon the vesting of restricted stock units, are a routine and common occurrence across all industries. Such transactions are generally not indicative of management's sentiment towards the company's future prospects or broader industry trends, but rather a standard compensation and tax management practice.

Stakeholder Impact

• Shareholders: Minimal impact, as this is a routine tax-related transaction and does not signal a change in company fundamentals or management's confidence.

Key Dates

Recommendation

This Form 4 reports a routine tax-related disposition of shares by an executive following RSU vesting. This type of transaction is a standard part of executive compensation and tax planning and does not typically signal a change in the company's fundamental outlook or warrant a shift in investment strategy. Therefore, a 'hold' recommendation is appropriate as the filing provides no new information to alter an existing investment thesis.

Keywords

Amphastar Pharmaceuticals, AMPH, Insider Transaction, Form 4, Stock Sale, Tax Withholding, RSU Vesting, Liawatidewi Yakob