We estimate that the CEO of Amphastar Pharmaceuticals, Inc. ($AMPH), Jack Yongfeng Zhang, received a compensation of $8,309,350 in 2025. This is an increase of 6.91% from an estimated $7,734,759 in 2024.
These estimates are based on a new DEF14A filing, filed with the SEC on April 13, 2026. Note that parsing errors may occur.
You can track $AMPH on Quiver Quantitative's $AMPH stock dashboard.
$AMPH Stock Insider Trading Activity
$AMPH Stock insiders have traded $AMPH stock on the open market 6 times in the past 6 months. Of those trades, 0 have been purchases and 6 have been sales.
Here’s a breakdown of recent trading of $AMPH stock by insiders over the last 6 months:
- FLOYD F. PETERSEN has made 0 purchases and 4 sales selling 21,342 shares for an estimated $561,978.
- RONG ZHOU (SENIOR EVP, PRODUCTION CENTER) sold 9,787 shares for an estimated $256,379
- RICHARD K PRINS sold 4,179 shares for an estimated $113,253
To track insider transactions, check out Quiver Quantitative's insider trading dashboard.
$AMPH Stock Hedge Fund Activity
We have seen 106 institutional investors add shares of $AMPH Stock stock to their portfolio, and 125 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- MILLENNIUM MANAGEMENT LLC removed 407,092 shares (-58.3%) from their portfolio in Q4 2025, for an estimated $10,901,923
- AMERICAN CENTURY COMPANIES INC added 376,751 shares (+130.6%) to their portfolio in Q4 2025, for an estimated $10,089,391
- MARSHALL WACE, LLP added 363,216 shares (+41.6%) to their portfolio in Q4 2025, for an estimated $9,726,924
- ALGERT GLOBAL LLC removed 267,772 shares (-68.2%) from their portfolio in Q4 2025, for an estimated $7,170,934
- PRICE T ROWE ASSOCIATES INC /MD/ removed 238,426 shares (-86.6%) from their portfolio in Q4 2025, for an estimated $6,385,048
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added 167,116 shares (+42.6%) to their portfolio in Q4 2025, for an estimated $4,475,366
- UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC removed 162,108 shares (-74.6%) from their portfolio in Q4 2025, for an estimated $4,341,252
To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard.
$AMPH Stock Analyst Ratings
Wall Street analysts have issued reports on $AMPH in the last several months. We have seen 1 firms issue buy ratings on the stock, and 0 firms issue sell ratings.
Here are some recent analyst ratings:
- Needham issued a "Buy" rating on 11/07/2025
To track analyst ratings and price targets for $AMPH Stock, check out Quiver Quantitative's $AMPH forecast page.
$AMPH Stock Price Targets
Multiple analysts have issued price targets for $AMPH recently. We have seen 3 analysts offer price targets for $AMPH in the last 6 months, with a median target of $30.0.
Here are some recent targets:
- Glen Santangelo from Barclays set a target price of $23.0 on 04/08/2026
- Serge Belanger from Needham set a target price of $30.0 on 02/27/2026
- Benjamin Burnett from Wells Fargo set a target price of $30.0 on 02/27/2026
This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.
