Institutional Ownership Amphastar Pharmaceuticals, Inc. (AMPH)
This table provides information about the institutional ownership of Amphastar Pharmaceuticals, Inc. (AMPH). We have compiled data on the 262 institutions that hold shares in the stock, with a total of 33.5 Million shares, which have been reported (via 13F filing form) to have a value of $873 Million.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Black Rock Inc.
New York, NY |
Aug 13, 2024 Q2 2024 |
5,942,524
shares
|
$155 Million
0.01% of portfolio
|
Q2 2024
Reduced 2.25%
|
|
|
Vanguard Group Inc
Valley Forge, PA |
Nov 07, 2025 Q3 2025 |
2,631,040
shares
|
$68.6 Million
0.0% of portfolio
|
Q3 2025
Reduced 2.08%
|
|
|
Td Asset Management Inc
|
Nov 10, 2025 Q3 2025 |
1,931,892
shares
|
$50.3 Million
0.05% of portfolio
|
Q3 2025
Reduced 5.06%
|
|
|
Dimensional Fund Advisors LP
Austin, TX |
Nov 12, 2025 Q3 2025 |
1,755,665
shares
|
$45.8 Million
0.01% of portfolio
|
Q3 2025
Added 7.92%
|
|
|
State Street Corp
Boston, MA |
Nov 14, 2025 Q3 2025 |
1,500,742
shares
|
$39.1 Million
0.0% of portfolio
|
Q3 2025
Reduced 4.79%
|
|
|
Fuller & Thaler Asset Management, Inc.
San Mateo, CA |
Nov 13, 2025 Q3 2025 |
1,353,927
shares
|
$35.3 Million
0.13% of portfolio
|
Q3 2025
Added 7.13%
|
|
|
Boston Trust Walden Corp
|
Oct 17, 2025 Q3 2025 |
1,173,107
shares
|
$30.6 Million
0.23% of portfolio
|
Q3 2025
Reduced 0.28%
|
|
|
Epoch Investment Partners, Inc.
New York, NY |
Nov 13, 2025 Q3 2025 |
1,133,986
shares
|
$29.6 Million
0.17% of portfolio
|
Q3 2025
Reduced 8.65%
|
|
|
Geode Capital Management, LLC
Boston, MA |
Nov 12, 2025 Q3 2025 |
922,577
shares
|
$24 Million
0.0% of portfolio
|
Q3 2025
Reduced 5.21%
|
|
|
Marshall Wace, LLP
London, X0 |
Nov 13, 2025 Q3 2025 |
874,068
shares
|
$22.8 Million
0.03% of portfolio
|
Q3 2025
Added 2.99%
|
|
|
Israel Englander
Millennium Management LLC | New York, Ny
|
Nov 14, 2025 Q3 2025 |
697,765
shares
|
$18.2 Million
0.01% of portfolio
|
Q3 2025
Added 12.73%
|
|
|
Jim Simons
Renaissance Technologies LLC | New York, Ny
|
Nov 13, 2025 Q3 2025 |
586,900
shares
|
$15.3 Million
0.02% of portfolio
|
Q3 2025
Added 1.8%
|
|
|
Morgan Stanley
New York, NY |
Nov 14, 2025 Q3 2025 |
574,679
shares
|
$15 Million
0.0% of portfolio
|
Q3 2025
Reduced 15.64%
|
|
|
D. E. Shaw & Co., Inc.
New York, NY |
Nov 14, 2025 Q3 2025 |
517,222
shares
|
$13.5 Million
0.01% of portfolio
|
Q3 2025
Added 75.97%
|
|
|
Systematic Financial Management LP
Teaneck, NJ |
Nov 13, 2025 Q3 2025 |
423,112
shares
|
$11 Million
0.29% of portfolio
|
Q3 2025
Added 17.76%
|
|
|
Northern Trust Corp
Chicago, IL |
Nov 14, 2025 Q3 2025 |
399,470
shares
|
$10.4 Million
0.0% of portfolio
|
Q3 2025
Reduced 5.14%
|
|
|
Algert Global LLC
San Francisco, CA |
Nov 14, 2025 Q3 2025 |
392,902
shares
|
$10.2 Million
0.18% of portfolio
|
Q3 2025
Added 216.12%
|
|
|
Arrowstreet Capital, Limited Partnership
Boston, MA |
Nov 13, 2025 Q3 2025 |
392,310
shares
|
$10.2 Million
0.01% of portfolio
|
Q3 2025
Added 382.91%
|
|
|
Invesco Ltd.
Atlanta, GA |
Nov 13, 2025 Q3 2025 |
389,593
shares
|
$10.2 Million
0.0% of portfolio
|
Q3 2025
Added 0.68%
|
|
|
Mesirow Institutional Investment Management, Inc.
Chicago, IL |
Feb 13, 2025 Q4 2024 |
380,389
shares
|
$9.91 Million
1.11% of portfolio
|
Q4 2024
Reduced 8.11%
|
|
|
Royce & Associates LP
|
Nov 12, 2025 Q3 2025 |
366,322
shares
|
$9.55 Million
0.1% of portfolio
|
Q3 2025
Added 29.36%
|
|
|
Charles Schwab Investment Management Inc
San Francisco, CA |
Nov 10, 2025 Q3 2025 |
356,409
shares
|
$9.29 Million
0.0% of portfolio
|
Q3 2025
Added 2.78%
|
|
|
Hotchkis & Wiley Capital Management LLC
Los Angeles, CA |
Nov 14, 2025 Q3 2025 |
326,183
shares
|
$8.5 Million
0.03% of portfolio
|
Q3 2025
Reduced 10.86%
|
|
|
Bridgeway Capital Management, LLC
Houston, TX |
Nov 14, 2025 Q3 2025 |
312,337
shares
|
$8.14 Million
0.19% of portfolio
|
Q3 2025
Added 266.97%
|
|
|
Ubs Group Ag
|
Nov 13, 2025 Q3 2025 |
312,274
shares
|
$8.14 Million
0.0% of portfolio
|
Q3 2025
Added 367.24%
|
|