Amphastar PharmaceuticalsAMPH
13F holders, Q2 2026 (June 30)211holders −4
29new positions
32sold out
7famous investors
$20.20avg. 13F price*
At the end of Q2 2026, 211 institutions reported holding Amphastar Pharmaceuticals Inc. (AMPH) in their 13F filings, down 4 from Q1 2026. 29 opened new positions and 32 sold out. The largest holders were BlackRock, Inc. ($105.4M), Dimensional Fund Advisors LP ($46.5M) and State Street Corp. ($33.1M). 7 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Steve Cohen (0.0% of Point72 Asset Management's portfolio).
- Company
- Amphastar Pharmaceuticals Inc.
- CUSIP
- 03209R103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 29 | $6.0M |
| Exits | 32 | $76.2M |
All 13F filers, Q1 2026 → Q2 2026: 2,645,146 shares bought and 6,674,057 shares sold, net −4,028,911 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 211 holders
| BlackRock, Inc. | 0.00% | Reduce -3.6% | 5,224,934 | $105.4M |
| Dimensional Fund Advisors LP | 0.01% | Add +13.7% | 2,305,107 | $46.5M |
| State Street Corp. | 0.00% | Add +2.1% | 1,642,126 | $33.1M |
| Vanguard Capital Management LLC | 0.00% | Reduce -4.0% | 1,481,952 | $29.9M |
| American Century Companies Inc. | 0.01% | Add +15.6% | 1,176,626 | $23.7M |
| Marshall Wace, LLP | 0.02% | Add +4.0% | 1,066,322 | $21.5M |
| Geode Capital Management, LLC | 0.00% | Reduce -0.7% | 969,840 | $19.6M |
| Fuller & Thaler Asset Management, Inc. | 0.05% | Reduce -32.0% | 949,238 | $19.2M |
| D. E. Shaw & Co. | 0.01% | Add +33.3% | 887,048 | $17.9M |
| Vanguard Portfolio Management LLC | 0.00% | Add +2.8% | 809,568 | $16.3M |
| LSV Asset Management | 0.02% | Reduce -1.5% | 642,014 | $13.0M |
| Renaissance Technologies | 0.01% | Reduce -5.2% | 525,100 | $10.6M |
| Goldman Sachs Group Inc. | 0.00% | Add +53.4% | 505,360 | $10.2M |
| Systematic Financial Management LP | 0.18% | Reduce -3.4% | 437,384 | $8.8M |
| Morgan Stanley | 0.00% | Add +3.5% | 434,840 | $8.8M |
| UBS Group AG | 0.00% | Reduce -6.5% | 393,110 | $7.9M |
| HRT Financial LP | 0.01% | Add +589.8% | 387,530 | $7.8M |
| Denali Advisors LLC | 0.76% | Add +41.1% | 375,965 | $7.6M |
| Northern Trust Corp. | 0.00% | Reduce -0.3% | 370,991 | $7.5M |
| Bridge City Capital, LLC | 1.56% | Add +1.1% | 338,708 | $6.8M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -3.4% | 310,178 | $6.3M |
| Bridgeway Capital Management, LLC | 0.11% | Reduce -9.5% | 298,954 | $6.0M |
| Royce & Associates LP | 0.05% | Reduce -27.4% | 294,758 | $5.9M |
| Two Sigma Investments, LP | 0.00% | Add +79.6% | 248,115 | $5.0M |
| First Trust Advisors LP | 0.00% | Add +64.0% | 246,951 | $5.0M |
| Pacer Advisors, Inc. | 0.01% | Reduce -7.8% | 241,181 | $4.9M |
| Bank of New York Mellon Corp | 0.00% | Reduce -4.5% | 232,343 | $4.7M |
| Vanguard Fiduciary Trust Co. | 0.00% | Reduce -2.8% | 224,478 | $4.5M |
| AQR Capital Management | 0.00% | Add +164.9% | 208,651 | $4.2M |
| Principal Financial Group Inc. | 0.00% | Reduce -2.3% | 204,250 | $4.1M |
| New York State Common Retirement Fund | 0.00% | Add +21.8% | 181,122 | $3.7M |
| Jane Street Group, LLC | 0.00% | Add +93.3% | 178,734 | $3.6M |
| Empowered Funds, LLC | 0.02% | Reduce -10.2% | 162,812 | $3.3M |
| O'shaughnessy Asset Management, LLC | 0.01% | Add +53.4% | 159,427 | $3.2M |
| Invesco Ltd. | 0.00% | Reduce -73.9% | 158,064 | $3.2M |
| Victory Capital Management Inc. | 0.00% | Reduce -40.1% | 149,612 | $3.0M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | No change | 139,402 | $2.8M |
| Bank of America Corp. | 0.00% | Reduce -21.5% | 136,824 | $2.8M |
| Algert Global LLC | 0.03% | Add +110.7% | 131,400 | $2.7M |
| Lam Group, Inc. | 1.31% | No change | 130,800 | $2.6M |
| Nordea Investment Management AB | 0.00% | Add +2.5% | 126,931 | $2.6M |
| Bessemer Group Inc. | 0.00% | Reduce -0.6% | 121,345 | $2.4M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Reduce -64.1% | 116,653 | $2.4M |
| Public Sector Pension Investment Board | 0.01% | Reduce -7.8% | 116,648 | $2.4M |
| Nuveen, LLC | 0.00% | Add +15.4% | 88,397 | $1.8M |
| Vanguard Global Advisers, LLC | 0.00% | Add +74.7% | 87,639 | $1.8M |
| Exchange Traded Concepts, LLC | 0.01% | Add +5.6% | 87,054 | $1.8M |
| Rhumbline Advisers | 0.00% | Reduce -3.9% | 80,454 | $1.6M |
| Squarepoint Ops LLC | 0.00% | Add +178.0% | 78,795 | $1.6M |
| Legal & General Group Plc | 0.00% | Reduce -3.3% | 78,281 | $1.6M |
| Assetmark, Inc. | 0.00% | Add +27.6% | 68,590 | $1.4M |
| Ameriprise Financial Inc. | 0.00% | Reduce -13.4% | 68,244 | $1.4M |
| Robeco Institutional Asset Management B.V. | 0.00% | No change | 66,407 | $1.3M |
| Swiss National Bank | 0.00% | Reduce -10.7% | 64,800 | $1.3M |
| JPMorgan Chase & Co. | 0.00% | Reduce -45.0% | 57,563 | $1.2M |
| Jump Financial, LLC | 0.01% | New | 56,781 | $1.1M |
| Wells Fargo & Company | 0.00% | Add +33.1% | 55,913 | $1.1M |
| Citigroup Inc. | 0.00% | Add +55.4% | 55,779 | $1.1M |
| Point72 Asset Management | 0.00% | New | 54,964 | $1.1M |
| Alliancebernstein L.P. | 0.00% | No change | 56,430 | $1.1M |
| BNP Paribas Financial Markets | 0.00% | Reduce -65.0% | 54,663 | $1.1M |
| Creative Planning | 0.00% | Add +213.6% | 51,444 | $1.0M |
| T. Rowe Price Associates Inc. | 0.00% | Add +13.8% | 51,103 | $1.0M |
| Voloridge Investment Management, LLC | 0.00% | Reduce -70.3% | 50,912 | $1.0M |
| Susquehanna International Group, LLP | 0.00% | Add +246.3% | 50,565 | $1.0M |
| Intech Investment Management LLC | 0.01% | Add +105.9% | 49,839 | $1.0M |
| SteelPeak Wealth, LLC | 0.03% | Add +0.5% | 48,684 | $982K |
| XTX Topco Ltd | 0.01% | Reduce -46.6% | 46,808 | $945K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -20.4% | 44,062 | $889K |
| Polaris Capital Management, LLC | 0.08% | No change | 43,232 | $872K |
| California State Teachers Retirement System | 0.00% | Add +27.8% | 36,151 | $730K |
| Deutsche Bank AG | 0.00% | Add +6.6% | 35,307 | $712K |
| Prudential Financial Inc. | 0.00% | Reduce -30.7% | 35,133 | $709K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | New | 34,704 | $700K |
| Vident Advisory, LLC | 0.01% | Add +47.2% | 34,221 | $691K |
| Brevan Howard Capital Management LP | 0.01% | Add +194.5% | 34,201 | $690K |
| Legato Capital Management LLC | 0.06% | No change | 34,135 | $689K |
| Janney Montgomery Scott LLC | 0.00% | Add +144.9% | 33,841 | $683K |
| Segall Bryant & Hamill, LLC | 0.01% | No change | 33,318 | $672K |
| SummerHaven Investment Management, LLC | 0.35% | No change | 32,633 | $659K |
| Millennium Management | 0.00% | Reduce -91.4% | 31,814 | $642K |
| SG Americas Securities, LLC | 0.00% | Reduce -3.3% | 31,709 | $640K |
| Engineers Gate Manager LP | 0.01% | New | 30,191 | $609K |
| FMR LLC | 0.00% | Add +2137.9% | 28,958 | $584K |
| CANADA LIFE ASSURANCE Co | 0.00% | Reduce -11.3% | 26,787 | $541K |
| State of Alaska, Department of Revenue | 0.01% | Reduce -3.6% | 26,433 | $531K |
| Advisor OS, LLC | 0.03% | No change | 25,405 | $513K |
| Advisory Research Inc. | 0.05% | Add +0.0% | 25,337 | $511K |
| Barclays PLC | 0.00% | Add +18.5% | 25,217 | $509K |
| Franklin Resources Inc. | 0.00% | Reduce -82.1% | 24,986 | $504K |
| Quadrature Capital Ltd | 0.00% | Reduce -20.1% | 24,428 | $493K |
| Campbell & CO Investment Adviser LLC | 0.02% | New | 23,211 | $468K |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | No change | 23,052 | $465K |
| Thrivent Financial for Lutherans | 0.00% | Reduce -5.6% | 22,295 | $450K |
| New York State Teachers Retirement System | 0.00% | Reduce -3.0% | 21,180 | $427K |
| Quantinno Capital Management LP | 0.00% | New | 20,827 | $420K |
| MetLife Investment Management, LLC | 0.00% | No change | 20,761 | $419K |
| Raymond James Financial Inc. | 0.00% | Add +1.4% | 19,313 | $390K |
| Russell Investments Group, Ltd. | 0.00% | Add +425.6% | 18,108 | $365K |
| Illinois Municipal Retirement Fund | 0.00% | Reduce -10.6% | 17,452 | $352K |
"% of holder's portfolio" is AMPH's weight in each manager's 13F, not the share of Amphastar Pharmaceuticals Inc. the manager owns.