Amphastar Pharmaceuticals, Inc. Major Shareholders & Ownership History
| Major Shareholder Name | Reporting Date | Shares Held | Market Value | Change in Shares | Ownership |
|---|---|---|---|---|---|
| BLACKROCK, INC. | 11/12/2025 | 5.49 M | $146.18 M | -3.24% | 11.68% |
| VANGUARD GROUP INC | 11/07/2025 | 2.63 M | $70.12 M | -2.08% | 5.60% |
| TD ASSET MANAGEMENT INC | 11/10/2025 | 1.93 M | $51.48 M | -5.06% | 4.11% |
| DIMENSIONAL FUND ADVISORS LP | 11/12/2025 | 1.76 M | $46.79 M | 7.92% | 3.74% |
| STATE STREET CORP | 11/14/2025 | 1.50 M | $39.99 M | -4.79% | 3.20% |
| FULLER & THALER ASSET MANAGEMENT, INC. | 11/13/2025 | 1.35 M | $36.08 M | 7.13% | 2.88% |
| BOSTON TRUST WALDEN CORP | 10/17/2025 | 1.17 M | $31.26 M | -0.28% | 2.50% |
| EPOCH INVESTMENT PARTNERS, INC. | 11/13/2025 | 1.13 M | $30.22 M | -8.65% | 2.42% |
| GEODE CAPITAL MANAGEMENT, LLC | 11/12/2025 | 922.58 K | $24.59 M | -5.21% | 1.97% |
| MARSHALL WACE, LLP | 11/13/2025 | 874.07 K | $23.29 M | 2.99% | 1.86% |
| MILLENNIUM MANAGEMENT LLC | 11/14/2025 | 697.77 K | $18.60 M | 12.73% | 1.49% |
| RENAISSANCE TECHNOLOGIES LLC | 11/13/2025 | 586.90 K | $15.64 M | 1.80% | 1.25% |
| MORGAN STANLEY | 11/14/2025 | 574.68 K | $15.32 M | -15.64% | 1.22% |
| D. E. SHAW & CO., INC. | 11/14/2025 | 517.22 K | $13.78 M | 75.97% | 1.10% |
| SYSTEMATIC FINANCIAL MANAGEMENT LP | 11/13/2025 | 423.11 K | $11.28 M | 17.76% | 0.90% |
| NORTHERN TRUST CORP | 11/14/2025 | 399.47 K | $10.65 M | -5.14% | 0.85% |
| ALGERT GLOBAL LLC | 11/14/2025 | 392.90 K | $10.47 M | 216.12% | 0.84% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 11/13/2025 | 392.31 K | $10.46 M | 382.91% | 0.84% |
| INVESCO LTD. | 11/13/2025 | 389.59 K | $10.38 M | 0.68% | 0.83% |
| ROYCE & ASSOCIATES LP | 11/12/2025 | 366.32 K | $9.76 M | 29.36% | 0.78% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 11/10/2025 | 356.41 K | $9.50 M | 2.78% | 0.76% |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 11/14/2025 | 326.18 K | $8.69 M | -10.86% | 0.69% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 11/14/2025 | 312.34 K | $8.32 M | 266.97% | 0.67% |
| UBS GROUP AG | 11/13/2025 | 312.27 K | $8.32 M | 367.24% | 0.67% |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | 11/14/2025 | 292.44 K | $7.79 M | -10.16% | 0.62% |
| AMERICAN CENTURY COMPANIES INC | 11/12/2025 | 288.59 K | $7.69 M | 23.77% | 0.61% |
| CLARK CAPITAL MANAGEMENT GROUP, INC. | 11/14/2025 | 283.67 K | $7.56 M | 100.00% | 0.60% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 11/14/2025 | 275.22 K | $7.34 M | 0.71% | 0.59% |
| BANK OF NEW YORK MELLON CORP | 11/03/2025 | 267.83 K | $7.14 M | -14.92% | 0.57% |
| JPMORGAN CHASE & CO | 11/26/2025 | 253.23 K | $6.75 M | 60.16% | 0.54% |
| GOLDMAN SACHS GROUP INC | 11/14/2025 | 241.23 K | $6.43 M | -32.29% | 0.51% |
| QUBE RESEARCH & TECHNOLOGIES LTD | 11/14/2025 | 241.21 K | $6.43 M | -48.62% | 0.51% |
| CITADEL ADVISORS LLC | 11/14/2025 | 226.78 K | $6.04 M | -22.43% | 0.48% |
| BNP PARIBAS ARBITRAGE, SNC | 11/13/2025 | 222.02 K | $5.92 M | 209.70% | 0.47% |
| VICTORY CAPITAL MANAGEMENT INC | 11/12/2025 | 211.80 K | $5.64 M | 175.56% | 0.45% |
| PRINCIPAL FINANCIAL GROUP INC | 11/04/2025 | 205.68 K | $5.48 M | -6.10% | 0.44% |
| NORDEA INVESTMENT MANAGEMENT AB | 10/27/2025 | 153.35 K | $4.09 M | 0.88% | 0.33% |
| FIRST TRUST ADVISORS LP | 11/12/2025 | 150.42 K | $4.01 M | 59.51% | 0.32% |
| EMPOWERED FUNDS, LLC | 11/13/2025 | 149.80 K | $3.99 M | 76.00% | 0.32% |
| JANE STREET GROUP, LLC | 11/14/2025 | 148.46 K | $3.96 M | -7.26% | 0.32% |
| BALYASNY ASSET MANAGEMENT L.P. | 11/14/2025 | 141.85 K | $3.78 M | -46.73% | 0.30% |
| PUBLIC SECTOR PENSION INVESTMENT BOARD | 11/06/2025 | 139.68 K | $3.72 M | 11.42% | 0.30% |
| BRIDGE CITY CAPITAL, LLC | 11/12/2025 | 136.26 K | $3.63 M | -1.72% | 0.29% |
| DENALI ADVISORS LLC | 11/07/2025 | 135.00 K | $3.60 M | 100.00% | 0.29% |
| LAM GROUP, INC. | 10/23/2025 | 130.80 K | $3.49 M | 0.00% | 0.28% |
| AMERIPRISE FINANCIAL INC | 11/14/2025 | 129.84 K | $3.46 M | -23.56% | 0.28% |
| RICE HALL JAMES & ASSOCIATES, LLC | 10/16/2025 | 129.34 K | $3.45 M | 100.00% | 0.28% |
| BANK OF AMERICA CORP /DE/ | 11/14/2025 | 127.10 K | $3.39 M | -12.42% | 0.27% |
| RAYMOND JAMES FINANCIAL INC | 11/14/2025 | 118.19 K | $3.15 M | 0.91% | 0.25% |
| TWO SIGMA INVESTMENTS, LP | 11/14/2025 | 98.68 K | $2.63 M | 23.15% | 0.21% |
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Amphastar Pharmaceuticals, Inc. institutional Ownership - FAQ's
During the previous two years, 337 institutional investors and hedge funds held shares of Amphastar Pharmaceuticals, Inc.. The most heavily invested institutionals were:
BlackRock, Inc.: 5.49 M
VANGUARD GROUP INC: 2.63 M
TD ASSET MANAGEMENT INC: 1.93 M
DIMENSIONAL FUND ADVISORS LP: 1.76 M
STATE STREET CORP: 1.5 M
FULLER & THALER ASSET MANAGEMENT, INC.: 1.35 M
69.75% of Amphastar Pharmaceuticals, Inc. stock is owned by institutional investors.
Institutional investors have bought a total of 47.14 M shares in the last 24 months. This purchase volume represents approximately $1.26 B in transactions.