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Stocks · Health care · Pharmaceutical Preparations

Amphastar Pharmaceuticals, Inc.

AMPH Clue Score63
United States Fiscal year ends December CIK 0001297184 Results filed 5 Nov 2026
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What the insiders did Net selling

By person

18 insiders · 408 transactions
150×

Jack Yongfeng Zhang holds 150 times base salary in stock. $143.09M of shares against $950.91K in salary for 2025.

Salary from the company's own proxy. The shares are what Jack Yongfeng Zhang last reported holding, valued at $25.00, the price Common Stock was last bought or sold at on the open market here, on 21 Sep 2026.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
William J Peters
CFO, EVP & Treasurer
—
$23.12M (67) scheduled
−$23.12M
168,707
$4.22M
+124.7%
Jack Y. Zhang
CEO & Chief Scientific Officer
$642.82K (2)
$22.03M (29)
−$21.39M
5,723,548
$143.09M
+8.9%
Mary Z. Luo
COO,Chief Scientist & Chairman
—
$19.97M (14) scheduled
−$19.97M
1,104,416
$27.61M
−24.1%
Yakob Liawatidewi
EVP Corp Admin Center
—
$7.14M (36) scheduled
−$7.14M
126,810
$3.17M
+114.9%
Jason B. Shandell
President and General Counsel
—
$7.10M (31) scheduled
−$7.10M
179,276
$4.48M
−19.4%
Rong Zhou
Senior EVP, Production Center
—
$6.53M (34) scheduled
−$6.53M
354,197
$8.85M
+52.0%
Richard K Prins
Director
—
$6.41M (32) scheduled
−$6.41M
29,625
$740.63K
+36.1%
Michael A Zasloff
Director
—
$5.97M (14) scheduled
−$5.97M
37,667
$941.68K
+16.2%
Howard Lee
Director
—
$4.29M (17) scheduled
−$4.29M
159,350
$3.98M
+39.1%
Floyd F. Petersen
Director
—
$4.28M (77) scheduled
−$4.28M
71,368
$1.78M
+19.9%
Applied Physics & Chemistry Laboratories, Inc. entity
10% owner
—
$2.85M (4)
−$2.85M
7,327,679
$183.19M
−1.8%
Stephen B. Shohet
Director
—
$2.73M (13) scheduled
−$2.73M
30,706
$767.65K
+68.0%
Richard Koo
Director
—
$1.99M (3) scheduled
−$1.99M
269,289
$6.73M
+12.4%
Diane G. Gerst
Director
—
$652.31K (14) scheduled
−$652.31K
31,899
$797.48K
—
Gayle Deflin
Director
—
$494.45K (3)
−$494.45K
19,057
$476.43K
—
David Maris
Director
$20.26K (1)
—
+$20.26K
19,170
$479.25K
+204.3%
David Russell Gaugh
Director
—
—
—
14,447
$361.18K
—
Anthony T Pierce
Director
—
—
—
7,886
$197.15K
—

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.