Amphastar PharmaceuticalsAMPH
13F holders, Q2 2025 (June 30)245holders +4
42new positions
40sold out
7famous investors
$22.98avg. 13F price*
At the end of Q2 2025, 245 institutions reported holding Amphastar Pharmaceuticals Inc. (AMPH) in their 13F filings, up 4 from Q1 2025. 42 opened new positions and 40 sold out. The largest holders were BlackRock, Inc. ($130.2M), Vanguard Group Inc. ($61.7M) and TD Asset Management Inc ($46.7M). 7 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Amphastar Pharmaceuticals Inc.
- CUSIP
- 03209R103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 42 | $17.1M |
| Exits | 40 | $41.2M |
All 13F filers, Q1 2025 → Q2 2025: 4,136,244 shares bought and 4,655,640 shares sold, net −519,396 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 245 holders
| BlackRock, Inc. | 0.00% | Reduce -7.8% | 5,668,793 | $130.2M |
| Vanguard Group Inc. | 0.00% | Add +10.9% | 2,686,950 | $61.7M |
| TD Asset Management Inc | 0.04% | Reduce -8.0% | 2,034,930 | $46.7M |
| Dimensional Fund Advisors LP | 0.01% | Add +19.9% | 1,626,884 | $37.4M |
| State Street Corp. | 0.00% | Reduce -1.8% | 1,576,233 | $36.2M |
| Fuller & Thaler Asset Management, Inc. | 0.11% | Add +0.0% | 1,263,772 | $29.0M |
| Epoch Investment Partners, Inc. | 0.15% | Reduce -1.6% | 1,241,369 | $28.5M |
| Boston Trust Walden Corp | 0.19% | Reduce -3.2% | 1,176,453 | $27.0M |
| Geode Capital Management, LLC | 0.00% | Add +1.9% | 973,237 | $22.3M |
| Marshall Wace, LLP | 0.02% | Reduce -17.7% | 848,685 | $19.5M |
| Morgan Stanley | 0.00% | Add +30.5% | 681,222 | $15.6M |
| Millennium Management | 0.01% | Reduce -28.7% | 618,984 | $14.2M |
| Renaissance Technologies | 0.02% | Add +16.5% | 576,500 | $13.2M |
| Qube Research & Technologies Ltd | 0.01% | Add +81.3% | 469,492 | $10.8M |
| Northern Trust Corp. | 0.00% | Reduce -29.1% | 421,136 | $9.7M |
| Invesco Ltd. | 0.00% | Add +7.8% | 386,971 | $8.9M |
| Hotchkis & Wiley Capital Management LLC | 0.03% | Add +35.5% | 365,920 | $8.4M |
| Systematic Financial Management LP | 0.22% | Add +10.0% | 359,307 | $8.2M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -12.4% | 356,250 | $8.2M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +6.3% | 346,784 | $8.0M |
| Pacer Advisors, Inc. | 0.02% | Reduce -32.0% | 326,098 | $7.5M |
| Voloridge Investment Management, LLC | 0.03% | Add +50.7% | 325,512 | $7.5M |
| Royal Bank of Canada | 0.00% | Add +1122.1% | 318,717 | $7.3M |
| Bank of New York Mellon Corp | 0.00% | Add +18.3% | 314,803 | $7.2M |
| D. E. Shaw & Co. | 0.01% | Add +907.0% | 293,928 | $6.7M |
| Citadel Advisors | 0.01% | Add +87.4% | 292,345 | $6.7M |
| Royce & Associates LP | 0.07% | Add +14.3% | 283,187 | $6.5M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -49.5% | 273,288 | $6.3M |
| Balyasny Asset Management L.P. | 0.01% | Add +64.3% | 266,306 | $6.1M |
| CX Institutional | 0.21% | Add +220.5% | 263,283 | $6.0M |
| American Century Companies Inc. | 0.00% | Reduce -24.3% | 233,161 | $5.4M |
| Principal Financial Group Inc. | 0.00% | Add +3.0% | 219,042 | $5.0M |
| Ameriprise Financial Inc. | 0.00% | Add +9.5% | 169,849 | $3.9M |
| Jane Street Group, LLC | 0.01% | Add +243.1% | 160,082 | $3.7M |
| JPMorgan Chase & Co. | 0.00% | Add +136.4% | 158,114 | $3.6M |
| Trexquant Investment LP | 0.04% | Add +70.0% | 155,229 | $3.6M |
| Nordea Investment Management AB | 0.00% | Add +0.7% | 152,015 | $3.5M |
| Bank of America Corp. | 0.00% | Add +36.0% | 145,125 | $3.3M |
| Bridge City Capital, LLC | 0.89% | Add +19.7% | 138,644 | $3.2M |
| Lam Group, Inc. | 2.01% | No change | 130,800 | $3.0M |
| Public Sector Pension Investment Board | 0.01% | Add +5.5% | 125,363 | $2.9M |
| Algert Global LLC | 0.06% | Add +618.4% | 124,290 | $2.9M |
| Raymond James Financial Inc. | 0.00% | Add +294.7% | 117,119 | $2.7M |
| Susquehanna Fundamental Investments, LLC | 0.06% | Reduce -11.8% | 101,553 | $2.3M |
| Legal & General Group Plc | 0.00% | Reduce -0.4% | 101,154 | $2.3M |
| Rhumbline Advisers | 0.00% | Add +7.1% | 95,287 | $2.2M |
| Two Sigma Advisers, LP | 0.00% | Add +12.4% | 95,200 | $2.2M |
| First Trust Advisors LP | 0.00% | Add +428.3% | 94,305 | $2.2M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +18.4% | 93,652 | $2.2M |
| Twinbeech Capital LP | 0.05% | Add +101.3% | 88,530 | $2.0M |
| Bridgeway Capital Management, LLC | 0.05% | New | 85,112 | $2.0M |
| Empowered Funds, LLC | 0.02% | New | 85,112 | $2.0M |
| Barclays PLC | 0.00% | Add +22.6% | 82,087 | $1.9M |
| Arrowstreet Capital, Limited Partnership | 0.00% | New | 81,239 | $1.9M |
| Nuveen, LLC | 0.00% | Reduce -15.2% | 81,142 | $1.9M |
| Two Sigma Investments, LP | 0.00% | Add +6.4% | 80,130 | $1.8M |
| Victory Capital Management Inc. | 0.00% | Reduce -5.2% | 76,862 | $1.8M |
| Prudential Financial Inc. | 0.00% | Add +11.5% | 41,951 | $1.7M |
| AQR Capital Management | 0.00% | Add +41.4% | 75,845 | $1.7M |
| Swiss National Bank | 0.00% | Reduce -2.5% | 72,600 | $1.7M |
| BNP Paribas Financial Markets | 0.00% | Add +802.3% | 71,689 | $1.6M |
| UBS Group AG | 0.00% | Reduce -25.2% | 66,834 | $1.5M |
| Jump Financial, LLC | 0.02% | New | 63,334 | $1.5M |
| Quantbot Technologies LP | 0.04% | Add +188.8% | 60,955 | $1.4M |
| Gsa Capital Partners LLP | 0.09% | Add +26.0% | 57,057 | $1.3M |
| SteelPeak Wealth, LLC | 0.05% | No change | 55,795 | $1.3M |
| Susquehanna International Group, LLP | 0.00% | Reduce -22.8% | 54,598 | $1.3M |
| Engineers Gate Manager LP | 0.02% | Add +38.4% | 53,348 | $1.2M |
| Aurora Investment Counsel | 0.64% | Reduce -1.5% | 53,253 | $1.2M |
| Intech Investment Management LLC | 0.01% | Reduce -15.3% | 51,071 | $1.2M |
| Alliancebernstein L.P. | 0.00% | No change | 50,630 | $1.2M |
| Brevan Howard Capital Management LP | 0.01% | Add +469.8% | 48,920 | $1.1M |
| New York State Common Retirement Fund | 0.00% | Reduce -40.7% | 48,369 | $1.1M |
| Assetmark, Inc. | 0.00% | Add +8.0% | 43,766 | $1.0M |
| LSV Asset Management | 0.00% | No change | 43,200 | $992K |
| Creative Planning | 0.00% | Add +111.8% | 42,620 | $979K |
| Citigroup Inc. | 0.00% | Reduce -45.7% | 42,220 | $969K |
| HRT Financial LP | 0.00% | Reduce -51.3% | 42,080 | $966K |
| Capital Fund Management S.A. | 0.01% | New | 40,570 | $931K |
| O'shaughnessy Asset Management, LLC | 0.01% | New | 40,309 | $925K |
| Susquehanna Portfolio Strategies, LLC | 0.02% | New | 39,564 | $908K |
| Edgestream Partners, L.P. | 0.02% | New | 37,112 | $852K |
| Legato Capital Management LLC | 0.10% | Add +21.4% | 36,060 | $828K |
| California State Teachers Retirement System | 0.00% | Reduce -1.4% | 35,877 | $824K |
| Arkadios Wealth Advisors | 0.02% | Add +3.5% | 35,163 | $807K |
| Polaris Capital Management, LLC | 0.05% | Add +14.0% | 35,100 | $806K |
| Aristeia Capital, L.L.C. | 0.04% | No change | 33,835 | $777K |
| Dynamic Technology Lab Private Ltd | 0.10% | New | 33,300 | $765K |
| ExodusPoint Capital Management, LP | 0.01% | Reduce -90.5% | 32,444 | $745K |
| CANADA LIFE ASSURANCE Co | 0.00% | Reduce -3.4% | 30,216 | $694K |
| Danske Bank A/S | 0.00% | New | 29,898 | $686K |
| AlphaQuest LLC | 0.07% | Add +149.1% | 28,882 | $663K |
| Illumine Investment Management, LLC | 0.50% | Add +2.3% | 27,126 | $623K |
| Thrivent Financial for Lutherans | 0.00% | Reduce -1.9% | 27,036 | $621K |
| Advisor OS, LLC | 0.06% | No change | 25,405 | $583K |
| State of Wisconsin Investment Board | 0.00% | Reduce -1.0% | 25,332 | $582K |
| Deutsche Bank AG | 0.00% | Reduce -18.5% | 25,178 | $578K |
| Martingale Asset Management L P | 0.01% | No change | 24,542 | $563K |
| SG Americas Securities, LLC | 0.00% | New | 24,448 | $561K |
| Wells Fargo & Company | 0.00% | Reduce -16.9% | 24,396 | $560K |
"% of holder's portfolio" is AMPH's weight in each manager's 13F, not the share of Amphastar Pharmaceuticals Inc. the manager owns.