AMPHASTAR PHARMACEUTICALS IN AMPH
$19.64
-2.3% 52w: $16.87 – $30.81
Latest 13F among current holders filed 11 days ago (Jun 24, 2026)
Price — last 12 months
research preview data16.8723.8430.81
Jun 20, 2025 Jul 2, 2026
Institutional holders
215
-21 QoQ
13F value
$634.0M
-32.4% QoQ
Smart-money holders
1
signal tier ≥ 2
New smart buyers
0
Q1 2026
Options barometer
calls only
$1.6M calls / — puts
Institutional value by quarter
Number of holders
Who owns AMPH?
Q1 2026 filings| Fund | Type | Shares | Value | % of fund | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | Index provider | 5.4M | $106.2M | 0.0% | -0.7% |
| DIMENSIONAL FUND ADVISORS LP | Quant stat arb | 2.0M | $39.7M | 0.0% | +12.7% |
| STATE STREET CORP | Index provider | 1.6M | $31.5M | 0.0% | +4.9% |
| VANGUARD CAPITAL MANAGEMENT LLC | Diversified mechanical | 1.5M | $30.2M | 0.0% | — |
| TD Asset Management Inc | Diversified mechanical | 1.5M | $30.2M | 0.0% | -21.5% |
| FULLER & THALER ASSET MANAGEMENT, INC. | Other | 1.4M | $27.3M | 0.1% | -50.0% |
| MARSHALL WACE, LLP | Quant stat arb | 1.0M | $20.1M | 0.0% | -17.1% |
| AMERICAN CENTURY COMPANIES INC | Diversified mechanical | 1.0M | $19.9M | 0.0% | +52.9% |
| GEODE CAPITAL MANAGEMENT, LLC | Index provider | 976.6K | $19.1M | 0.0% | +10.1% |
| Boston Trust Walden Corp | Other | 944.8K | $18.5M | 0.2% | -13.1% |
| Epoch Investment Partners, Inc. | Other | 898.9K | $17.6M | 0.1% | -20.2% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Diversified mechanical | 787.8K | $15.4M | 0.0% | — |
| D. E. Shaw & Co., Inc. | Quant stat arb | 665.5K | $13.0M | 0.0% | +19.5% |
| LSV ASSET MANAGEMENT | Other | 651.7K | $12.8M | 0.0% | +490.9% |
| Invesco Ltd. | Index provider | 604.8K | $11.8M | 0.0% | +20.6% |
| RENAISSANCE TECHNOLOGIES LLC | Quant stat arb | 553.9K | $10.9M | 0.0% | +1.7% |
| SYSTEMATIC FINANCIAL MANAGEMENT LP | Other | 452.9K | $8.9M | 0.2% | +4.0% |
| MORGAN STANLEY | Bank broker | 420.3K | $8.2M | 0.0% | -29.0% |
| UBS Group AG | Bank broker | 420.3K | $8.2M | 0.0% | +63.8% |
| ROYCE & ASSOCIATES LP | Other | 406.2K | $8.0M | 0.1% | +15.3% |
| NORTHERN TRUST CORP | Index provider | 372.3K | $7.3M | 0.0% | +0.2% |
| MILLENNIUM MANAGEMENT LLC | Multistrat pod | 371.4K | $7.3M | 0.0% | +27.8% |
| Bridge City Capital, LLC | Other | 335.1K | $6.6M | 1.8% | +42.3% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Diversified mechanical | 330.5K | $6.5M | 0.1% | +2.1% |
| GOLDMAN SACHS GROUP INC | Bank broker | 329.4K | $6.5M | 0.0% | -40.8% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Quant stat arb | 325.3K | $6.4M | 0.0% | -41.9% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Index provider | 321.0K | $6.3M | 0.0% | -8.5% |
| DENALI ADVISORS LLC | Other | 266.5K | $5.2M | 0.6% | +25.8% |
| Pacer Advisors, Inc. | Diversified mechanical | 261.5K | $5.1M | 0.0% | +47.1% |
| VICTORY CAPITAL MANAGEMENT INC | Diversified mechanical | 249.6K | $4.9M | 0.0% | -18.2% |
| Bank of New York Mellon Corp | Diversified mechanical | 243.2K | $4.8M | 0.0% | -6.1% |
| VANGUARD FIDUCIARY TRUST CO | Diversified mechanical | 231.0K | $4.5M | 0.0% | — |
| PRINCIPAL FINANCIAL GROUP INC | Diversified mechanical | 209.1K | $4.1M | 0.0% | -4.1% |
| RICE HALL JAMES & ASSOCIATES, LLC | Other | 187.3K | $3.7M | 0.2% | +54.6% |
| Empowered Funds, LLC | Diversified mechanical | 181.3K | $3.6M | 0.0% | +9.3% |
| BANK OF AMERICA CORP /DE/ | Bank broker | 174.3K | $3.4M | 0.0% | +36.0% |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Diversified mechanical | 171.2K | $3.4M | 0.0% | -26.0% |
| BNP PARIBAS FINANCIAL MARKETS | Bank broker | 156.1K | $3.1M | 0.0% | +29.1% |
| FIRST TRUST ADVISORS LP | Index provider | 150.6K | $3.0M | 0.0% | +7.3% |
| NEW YORK STATE COMMON RETIREMENT FUND | Diversified mechanical | 148.7K | $2.9M | 0.0% | +18.1% |
| Universal- Beteiligungs- und Servicegesellschaft mbH | Diversified mechanical | 139.4K | $2.7M | 0.0% | +379.0% |
| FRANKLIN RESOURCES INC | Long only active | 139.3K | $2.7M | 0.0% | +434.9% |
| TWO SIGMA INVESTMENTS, LP | Quant stat arb | 138.1K | $2.7M | 0.0% | +40.0% |
| LAM GROUP, INC. | Wealth advisor | 130.8K | $2.6M | 1.4% | Held |
| Public Sector Pension Investment Board | Pension sovereign | 126.6K | $2.5M | 0.0% | +3.3% |
| NORDEA INVESTMENT MANAGEMENT AB | Other | 123.8K | $2.4M | 0.0% | -4.1% |
| BESSEMER GROUP INC | Diversified mechanical | 122.0K | $2.4M | 0.0% | +1.0% |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC | Diversified mechanical | 103.9K | $2.0M | 0.0% | +19.2% |
| JPMORGAN CHASE & CO | Bank broker | 104.6K | $2.0M | 0.0% | -34.1% |
| JANE STREET GROUP, LLC | Market maker | 92.5K | $1.8M | 0.0% | -57.5% |
Exits are not a bearish signal: our backtest shows stocks specialists exit keep outperforming for 3+ quarters — selling usually means profit-taking, not a forecast.
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