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Amphastar Pharmaceuticals, Inc. (AMPH)  
$27.55 1.04 (3.64%) as of 4:30 Thu 2/12


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  Company Roster

Total Insiders  : 18  
Total Direct Shares :
7,415,368
Total Indirect Shares :
25,340,362
 
% Held by Insiders:
15.61%
 
12 other people own 
 $17,239,798 Lee Howard
 $4,186,939 Shandell Jason B.
 $4,939,054 Koo Richard
 $7,143,412 Zhang Jack Y.
 $30,426,661 Applied Physics & Chemist...
 $61,904,519 Luo Mary Z.
 $78,453,005  
 
Filer's Name Relation Direct Date   Direct Shares Indirect Date Indirect Shares
   Zhou Rong 2025-12-17 138,043 2025-12-17 104,668
   Petersen Floyd F. 2025-12-12 71,368 0
   Prins Richard K 2025-11-25 35,183 0
   Gaugh David Russell 2025-07-18 6,304 2025-07-18 0
   Luo Mary Z. COO, Chief Scientist, Chairman, Director, 10% Owner 2025-06-13 2,847,659 2025-06-13 8,013,154
   Lee Howard 2025-06-03 151,976 0
   Deflin Gayle 2025-06-02 10,914 2021-06-07 0
   Gerst Diane G. 2025-06-02 23,756 0
   Zasloff Michael A 2025-06-02 29,524 0
   Peters William J 2025-05-19 124,985 0
   Liawatidewi Yakob 2025-03-17 90,909 2025-03-17 2,459
   Zhang Jack Y. CEO & Chief Scientific Officer, Director, 10% Owner 2024-01-10 1,104,416 2024-01-10 8,911,397
   Koo Richard Director 2021-06-07 259,289 2021-06-07 10,000
   Maris David Director 2021-06-07 19,170 2020-06-08 0
   Applied Physics & Chemistry Laboratories, Inc. 10% Owner 2021-02-18 2,246,988 2021-02-18 8,282,640
   Shandell Jason B. President and General Counsel, Director 2020-03-17 179,276 0
   Shohet Stephen B. Director 2018-12-10 30,706 2014-08-15 0
   Purchase Marilyn J. Corp. Exec. VP of Operations 2015-04-09 44,902 2015-04-09 16,044
18 Records found