PETERS WILLIAM J 4
4 · Amphastar Pharmaceuticals, Inc. · Filed Mar 10, 2026
Research Summary
AI-generated summary of this filing
Amphastar (AMPH) CFO William J. Peters Withholds 2,146 Shares for Taxes
What Happened
William J. Peters (CFO, EVP & Treasurer, Director) had 2,146 shares withheld to satisfy tax liabilities tied to the vesting of restricted stock units (RSUs). The withholding was done at an effective price of $19.34 per share, representing $41,504 in value. This was a tax-withholding disposition (not an open-market sale or purchase).
Key Details
- Transaction date: 2026-03-06; Filing date: 2026-03-10 (filed timely within Form 4 deadlines).
- Withheld shares: 2,146 shares at $19.34 per share; total value ≈ $41,504.
- Transaction code: F (shares withheld to satisfy tax liability); footnote: shares withheld to satisfy reporting person's tax liability in connection with RSU vesting.
- Shares owned after transaction: not specified in the excerpt provided.
Context
This was a tax-withholding action following RSU vesting (a common administrative step) rather than an active sale that signals a change in conviction. Such withholdings reduce the insider's recorded share count but do not necessarily reflect a decision to liquidate holdings on the open market.
Insider Transaction Report
- Tax Payment
Common Stock
[F1]2026-03-06$19.34/sh−2,146$41,504→ 121,640 total
Footnotes (1)
- [F1]The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs.