Rong Zhou Amphastar Pharmaceuticals, Inc. (AMPH) insider trading activity

Rong Zhou is SENIOR EVP, PRODUCTION CENTER of Amphastar Pharmaceuticals, Inc.. Currently has a direct ownership of 140,686 shares of AMPH, which is worth approximately $3.7 Million. The most recent transaction as insider was on Mar 10, 2025, when has been sold 24,692 shares (Common Srock) at a price of $0.0 per share, resulting in proceeds of $0. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 141K

18.75% 3M change

13.87% 12M change

Total Value Held $3.7 Million

Rong Zhou Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Mar 10 2025	BUY Grant, award, or other acquisition	-	24,692 Added 14.93%	140,686 Common Srock
Mar 06 2025	SELL Payment of exercise price or tax liability	$38,345 $28.32 p/Share	1,354 Reduced 1.15%	115,994 Common Stock
Mar 04 2025	SELL Payment of exercise price or tax liability	$30,962 $27.62 p/Share	1,121 Reduced 0.95%	117,348 Common Stock
Dec 13 2024	SELL Open market or private sale	$361,840 $45.23 p/Share	8,000 Reduced 6.33%	118,469 Common Stock
Dec 13 2024	BUY Exercise of conversion of derivative security	$90,640 $11.33 p/Share	8,000 Added 5.95%	126,469 Common Stock
Dec 12 2024	SELL Open market or private sale	$310,940 $44.42 p/Share	7,000 Reduced 5.58%	118,469 Common Stock
Dec 12 2024	BUY Exercise of conversion of derivative security	$79,310 $11.33 p/Share	7,000 Added 5.28%	125,469 Common Stock
Nov 12 2024	SELL Open market or private sale	$336,929 $48.88 p/Share	6,893 Reduced 5.5%	118,388 Common Stock
Nov 12 2024	BUY Exercise of conversion of derivative security	$103,050 $14.95 p/Share	6,893 Added 5.22%	125,281 Common Stock
Sep 13 2024	SELL Open market or private sale	$144,780 $48.26 p/Share	3,000 Reduced 2.47%	118,388 Common Srock
Sep 13 2024	BUY Exercise of conversion of derivative security	$44,850 $14.95 p/Share	3,000 Added 2.41%	121,388 Common Srock
Aug 26 2024	SELL Open market or private sale	$193,400 $48.35 p/Share	4,000 Reduced 3.27%	118,388 Common Srock
Aug 26 2024	BUY Exercise of conversion of derivative security	$59,800 $14.95 p/Share	4,000 Added 3.16%	122,388 Common Srock
Mar 17 2024	SELL Payment of exercise price or tax liability	$84,421 $43.05 p/Share	1,961 Reduced 1.63%	118,016 Common Stock
Mar 16 2024	SELL Payment of exercise price or tax liability	$101,382 $43.05 p/Share	2,355 Reduced 1.93%	119,977 Common Srock
Mar 15 2024	SELL Payment of exercise price or tax liability	$52,477 $43.05 p/Share	1,219 Reduced 0.99%	122,332 Common Srock
Mar 06 2024	SELL Payment of exercise price or tax liability	$64,370 $46.31 p/Share	1,390 Reduced 1.11%	123,551 Common Srock
Mar 04 2024	BUY Grant, award, or other acquisition	-	12,521 Added 9.11%	124,941 Common Srock
Dec 04 2023	SELL Open market or private sale	$209,364 $59.58 p/Share	3,514 Reduced 3.03%	112,420 Common Stock
Dec 04 2023	BUY Exercise of conversion of derivative security	$56,891 $16.19 p/Share	3,514 Added 2.94%	115,934 Common Stock
Dec 01 2023	SELL Open market or private sale	$252,831 $58.58 p/Share	4,316 Reduced 3.7%	112,420 Common Stock
Dec 01 2023	BUY Exercise of conversion of derivative security	$62,150 $14.4 p/Share	4,316 Added 3.57%	116,736 Common Stock
Jun 20 2023	BUY Exercise of conversion of derivative security	$109,345 $11.33 p/Share	9,651 Added 7.91%	112,341 Common Stock
Jun 15 2023	SELL Open market or private sale	$258,950 $51.79 p/Share	5,000 Reduced 4.91%	96,888 Common Stock
Jun 15 2023	BUY Exercise of conversion of derivative security	$294,142 $15.18 p/Share	19,377 Added 15.87%	102,690 Common Stock

Rong Zhou

SENIOR EVP, PRODUCTION CENTER

Rancho Cucamonga, CA

Institutional Portfolio Updates

Receive a notification when an Institution or Guru buys or sells AMPH shares.

Notify only if

Value

Insider Trading

Get notified when an Amphastar Pharmaceuticals, Inc. insider buys or sells AMPH shares.

Notify only if

Operation

Value

Type

News

Receive news related to Amphastar Pharmaceuticals, Inc.

Track Activities on AMPH

Account