Amphastar Pharmaceuticals Inc

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Amphastar Pharmaceuticals Inc
TickerAMPH
CIK #0001297184
CUSIP03209R103
SectorLife Sciences - Pharmaceutical Preparations
Address11570 Sixth Street, Rancho Cucamonga, CA 91730
Source [EDGAR]
CIK Filing 2011 - 2025
[0001297184] 10-K
[0001297184] 10-Q
[0001297184] 3
[0001297184] 4
[0001297184] 8-K
[0001297184] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Federated Hermes Inc Amphastar Pharmaceuticals Inc [2021-02-12] 6.79
Vanguard Group Inc Amphastar Pharmaceuticals Inc [2020-02-11] 5.03
BlackRock Inc Amphastar Pharmaceuticals Inc [2017-01-09] 11.0
Zhang Jack Y Amphastar Pharmaceuticals Inc [2015-02-12] 24.91
Broadfin Capital LLC Amphastar Pharmaceuticals Inc [2014-07-03] 5.01
Flynn James E Amphastar Pharmaceuticals Inc [2014-06-30] 4.22
Form 3/4/5 Filer 2011 - 2025
Amphastar Pharmaceuticals, Inc.
Petersen Floyd F.
Gaugh David Russell
Zhang Jack Y.
Luo Mary Z.
Zasloff Michael A
Lee Howard
Deflin Gayle
Gerst Diane G.
Prins Richard K
Peters William J
Liawatidewi Yakob
Zhou Rong
Maris David
Koo Richard
Applied Physics & Chemistry Laboratories, Inc.
Shandell Jason B.
Shohet Stephen B.
Purchase Marilyn J.
Form 13F Holdings
Firm Period DFND Voting Shares
BlackRock, Inc. [2025-06-30] SOLE 5,546,511 5,668,793
Vanguard Group Inc [2025-06-30] SOLE 0 2,599,958
TD Asset Management Inc [2025-06-30] SOLE 2,034,930 2,034,930
State Street Corp [2025-06-30] DFND 1,441,202 1,576,233
Dimensional Fund Advisors LP [2025-06-30] SOLE 1,489,474 1,554,846
Fuller & Thaler Asset Management Inc [2025-06-30] SOLE 1,263,772 1,263,772
Epoch Investment Partners Inc [2025-06-30] DFND 0 1,227,140
Boston Trust Walden Corp [2025-06-30] DFND 1,000,968 1,176,453
Geode Capital Management LLC [2025-06-30] DFND 973,237 973,237
Marshall Wace LLP [2025-06-30] OTR 0 848,685
Morgan Stanley [2025-06-30] DFND 627,627 681,222
Millennium Management LLC [2025-06-30] SOLE 618,984 618,984
Renaissance Technologies LLC [2025-06-30] SOLE 576,500 576,500
Qube Research & Technologies Ltd [2025-06-30] SOLE 469,492 469,492
Northern Trust Corp [2025-06-30] DFND 399,528 400,858
Invesco Ltd. [2025-06-30] DFND 0 386,971
Hotchkis & Wiley Capital Management LLC [2025-06-30] SOLE 296,020 365,920
Goldman Sachs Group Inc [2025-06-30] DFND 353,016 356,250
Charles Schwab Investment Management Inc [2025-06-30] SOLE 346,759 346,784
Systematic Financial Management LP [2025-06-30] DFND 192,560 345,495
Pacer Advisors Inc [2025-06-30] SOLE 326,098 326,098
Voloridge Investment Management LLC [2025-06-30] SOLE 325,512 325,512
Citadel Advisors LLC [2025-06-30] DFND 322,945 322,945
Bank of New York Mellon Corp [2025-06-30] DFND 290,967 314,803
Royal Bank of Canada [2025-06-30] DFND 291,002 310,397
D. E. Shaw & Co., Inc. [2025-06-30] DFND 293,028 293,928
Royce & Associates LP [2025-06-30] SOLE 283,187 283,187
Balyasny Asset Management LP [2025-06-30] SOLE 266,306 266,306
Price T Rowe Associates Inc /MD/ [2025-06-30] SOLE 240,979 240,979
American Century Companies Inc [2025-06-30] DFND 233,161 233,161
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