RICHARD K PRINS, a director at $AMPH ($AMPH), sold 10,000 shares of the company on 12-09-2024. We received data on the trade from a recent SEC filing. This was a sale of approximately 24.7% of their shares. Following this trade, they now own 30,471 shares of $AMPH stock.

$AMPH Insider Trading Activity

$AMPH insiders have traded $AMPH stock on the open market 12 times in the past 6 months. Of those trades, 0 have been purchases and 12 have been sales.

Here's a breakdown of recent trading of $AMPH stock by insiders over the last 6 months:

• RICHARD K PRINS has traded it 3 times. They made 0 purchases and 3 sales, selling 32,101 shares.
• RONG ZHOU (SENIOR EVP, PRODUCTION CENTER) has traded it 3 times. They made 0 purchases and 3 sales, selling 13,893 shares.
• WILLIAM J PETERS (CFO, EVP & TREASURER) has traded it 4 times. They made 0 purchases and 4 sales, selling 21,304 shares.
• YAKOB LIAWATIDEWI (EVP CORP ADMIN CENTER) sold 5,214 shares.
• FLOYD F. PETERSEN sold 3,000 shares.

To track insider transactions, check out Quiver Quantitative's insider trading dashboard.

$AMPH Hedge Fund Activity

We have seen 136 institutional investors add shares of $AMPH stock to their portfolio, and 161 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

• BOSTON TRUST WALDEN CORP added 539,639 shares (+inf%) to their portfolio in Q3 2024
• MILLENNIUM MANAGEMENT LLC removed 479,098 shares (-64.9%) from their portfolio in Q3 2024
• TD ASSET MANAGEMENT INC added 443,469 shares (+26.2%) to their portfolio in Q3 2024
• MARSHALL WACE, LLP added 341,367 shares (+150.3%) to their portfolio in Q3 2024
• GOLDMAN SACHS GROUP INC added 295,783 shares (+192.6%) to their portfolio in Q3 2024
• HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC added 222,620 shares (+inf%) to their portfolio in Q3 2024
• PORTOLAN CAPITAL MANAGEMENT, LLC added 218,901 shares (+201.1%) to their portfolio in Q3 2024

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard.

This article is not financial advice. See Quiver Quantitative's disclaimers for more information.