Amphastar Pharmaceuticals, Inc. (AMPH) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

46,891,892Shares Outstanding
294,009Shares held by institutions
$8,602,703Value of institutional holdings
11.61%Institutional ownership %
3.38%Shares Changed QoQ
71No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Amphastar Pharmaceuticals, Inc. (NASDAQ:AMPH) currently has 71 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

239 Institutional Holders

294,009 Total Shares Held
Download Data
Owner Name Date Shares Held Change (QoQ) Change (%) Value (USD)
BlackRock, Inc. 30 Sep, 2025 5,485,057 -183,736 -3.24% $146,176,770.00
VANGUARD GROUP INC 30 Sep, 2025 2,631,040 -55,910 -2.08% $70,117,216.00
TD ASSET MANAGEMENT INC 30 Sep, 2025 1,931,892 -103,038 -5.06% $51,484,922.00
DIMENSIONAL FUND ADVISORS LP 30 Sep, 2025 1,755,665 128,781 7.92% $46,789,114.00
STATE STREET CORP 30 Sep, 2025 1,500,742 -75,491 -4.79% $39,994,774.00
FULLER & THALER ASSET MANAGEMENT, INC. 30 Sep, 2025 1,353,927 90,155 7.13% $36,082,167.00
Boston Trust Walden Corp 30 Sep, 2025 1,173,107 -3,346 -0.28% $31,263,302.00
Epoch Investment Partners, Inc. 30 Sep, 2025 1,133,986 -107,383 -8.65% $30,220,727.00
GEODE CAPITAL MANAGEMENT, LLC 30 Sep, 2025 922,577 -50,660 -5.21% $24,590,067.00
MARSHALL WACE, LLP 30 Sep, 2025 874,068 25,383 2.99% $23,293,911.00
MILLENNIUM MANAGEMENT LLC 30 Sep, 2025 697,765 78,781 12.73% $18,595,437.00
RENAISSANCE TECHNOLOGIES LLC 30 Sep, 2025 586,900 10,400 1.80% $15,640,885.00
MORGAN STANLEY 30 Sep, 2025 574,679 -106,543 -15.64% $15,315,209.00
D. E. Shaw & Co., Inc. 30 Sep, 2025 517,222 223,294 75.97% $13,783,966.00
SYSTEMATIC FINANCIAL MANAGEMENT LP 30 Sep, 2025 423,112 63,805 17.76% $11,275,974.00
NORTHERN TRUST CORP 30 Sep, 2025 399,470 -21,666 -5.14% $10,645,876.00
ALGERT GLOBAL LLC 30 Sep, 2025 392,902 268,612 216.12% $10,471.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 30 Sep, 2025 392,310 311,071 382.91% $10,455,062.00
Invesco Ltd. 30 Sep, 2025 389,593 2,622 0.68% $10,382,654.00
ROYCE & ASSOCIATES LP 30 Sep, 2025 366,322 83,135 29.36% $9,762,481.00