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

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		2026-03-17 18:12:222,990,052
8,072,804		11,062,856Form 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		2026-03-17 18:16:22171,554
104,668		276,222Form 4
6Lee Howard
Director		2026-06-03 21:20:03176,715
0		176,715Form 4
7PETERS WILLIAM J
CFO, EVP & TREASURER		2026-03-17 18:14:22175,063
0		175,063Form 4
8Liawatidewi Yakob
EVP CORP ADMIN CENTER		2026-03-17 20:17:50121,892
2,459		124,351Form 4
9Petersen Floyd F.
Director		2025-12-15 17:17:4271,368
0		71,368Form 4
10Purchase Marilyn J.
Former Officer		2015-06-17 18:14:3143,263
16,044		59,307Form 4
11ZASLOFF MICHAEL A
Director		2026-06-03 20:34:1555,032
0		55,032Form 4
12PRINS RICHARD K
Director		2026-06-03 21:22:1154,963
0		54,963Form 4
13Gerst Diane G.
Director		2026-06-03 20:33:0049,264
0		49,264Form 4
14Deflin Gayle
Director		2026-06-03 20:29:3936,422
0		36,422Form 4
15Maris David
Director		2021-06-08 20:57:2336,352
0		36,352Form 4
16Gaugh David Russell
Director		2026-06-03 20:31:1031,812
0		31,812Form 4
17Shohet Stephen B.
Director		2018-12-12 20:37:0430,706
0		30,706Form 4