Insider Holders & Insider Ownership - Amphastar Pharmaceuticals Inc. (AMPH)

List of insiders holdings for Amphastar Pharmaceuticals Inc.:
  1. Shares directly owned by the insider.
  2. Shares indirectly owned by the insider.
  3. Total shares owned by the insider (sum of shares directly and indirectly owned).
  4. Total market value if available.
  5. Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
#Insider Holder NameReport
Date Time		Shares Owned
Directly
Indirectly		Total
Shares Owned		Filing
1Zhang Jack Y.
Luo Mary Z.
Applied Physics & Chemistry Laboratories Inc.
CEO & Chief Scientific Officer
10% Owner		2025-02-07 19:21:1812,524,153
0		12,524,153Form 13G
2Zhang Jack Y.
Luo Mary Z.
CEO & CHIEF SCIENTIFIC OFFICER
10% Owner		2025-06-16 17:19:353,052,662
8,013,154		11,065,816Form 4
3Shandell Jason B.
President and General Counsel		2020-03-18 17:31:08330,234
0		330,234Form 4
4Koo Richard
Director		2021-06-08 20:55:10276,471
10,000		286,471Form 4
5Zhou Rong
SENIOR EVP, PRODUCTION CENTER		2025-03-18 19:43:26137,497
104,668		242,165Form 4
6Lee Howard
Director		2025-06-04 20:04:41163,378
0		163,378Form 4
7PETERS WILLIAM J
CFO, EVP & TREASURER		2025-05-20 17:02:46124,985
0		124,985Form 4
8Liawatidewi Yakob
EVP CORP ADMIN CENTER		2025-03-18 18:41:2490,909
2,459		93,368Form 4
9Petersen Floyd F.
Director		2025-07-03 17:30:4777,531
0		77,531Form 4
10Purchase Marilyn J.
Former Officer		2015-06-17 18:14:3143,263
16,044		59,307Form 4
11PRINS RICHARD K
Director		2025-06-04 18:40:4946,585
0		46,585Form 4
12ZASLOFF MICHAEL A
Director		2025-06-04 18:30:3540,926
0		40,926Form 4
13Maris David
Director		2021-06-08 20:57:2336,352
0		36,352Form 4
14Gerst Diane G.
Director		2025-06-04 19:02:0135,158
0		35,158Form 4
15Shohet Stephen B.
Director		2018-12-12 20:37:0430,706
0		30,706Form 4
16Deflin Gayle
Director		2025-06-04 19:45:1522,316
0		22,316Form 4