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 115,994 shares of AMPH, which is worth approximately $3.3 Million. The most recent transaction as insider was on Mar 06, 2025, when has been sold 1,354 shares (Common Stock) at a price of $28.32 per share, resulting in proceeds of $38,345. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 116K

2.02% 3M change

6.12% 12M change

Total Value Held $3.3 Million

Rong Zhou Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
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
Jun 13 2023	SELL Open market or private sale	$241,200 $48.24 p/Share	5,000 Reduced 5.36%	88,313 Common Stock

Rong Zhou

SENIOR EVP, PRODUCTION CENTER

Rancho Cucamonga, CA

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