Amphastar Pharmaceuticals, Inc.
AMPH- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001297184
In the last 90 days, Amphastar Pharmaceuticals, Inc. insiders filed 0 open-market purchases and 5 sales; 212 institutions reported holding it in 13F filings for Q2 2026, worth $572.1M in total; no superinvestor holds it.
13F holders, Q4 2023
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Dec 31, 2023. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 276
- +23 vs. Q3 2023
- Shares held
- 33.3M
- +1.32M (+4.1%) vs. Q3 2023
- Total value
- $2.06B
- +$588.4M (+40.0%) vs. Q3 2023
- New holders
- 48
- 97 more added
- Sold out
- 25
- 93 more reduced
3 institutions that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2023: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting AMPH on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 212 | $572.1M |
| Q1 2026 | 215 | $634.0M |
| Q4 2025 | 236 | $899.7M |
| Q3 2025 | 243 | $872.8M |
| Q2 2025 | 245 | $752.0M |
| Q1 2025 | 241 | $963.6M |
| Q4 2024 | 264 | $1.31B |
| Q3 2024 | 279 | $1.72B |
| Q2 2024 | 269 | $1.37B |
| Q1 2024 | 271 | $1.47B |
| Q4 2023 | 276 | $2.06B |
| Q3 2023 | 256 | $1.47B |
| Q2 2023 | 246 | $1.80B |
| Q1 2023 | 218 | $1.13B |
| Q4 2022 | 213 | $816.7M |
| Q3 2022 | 207 | $839.3M |
| Q2 2022 | 223 | $1.06B |
| Q1 2022 | 203 | $1.07B |
| Q4 2021 | 168 | $678.8M |
| Q3 2021 | 140 | $530.8M |
| Q2 2021 | 146 | $549.6M |
| Q1 2021 | 135 | $476.9M |
Institutions, Q4 2023
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock Inc. | 6,037,158 | $373.4M | 0.01% | −53,101−0.9% | Reduced |
| Federated Hermes, Inc. | 3,272,761 | $202.4M | 0.50% | −169,473−4.9% | Reduced |
| Vanguard Group Inc | 2,815,596 | $174.1M | 0.00% | +48,203+1.7% | Added |
| Neuberger Berman Group LLC | 1,693,002 | $104.7M | 0.09% | +205,023+13.8% | Added |
| State Street Corp | 1,471,137 | $91.0M | 0.00% | +11,646+0.8% | Added |
| Dimensional Fund Advisors LP | 1,339,142 | $82.8M | 0.02% | −548,596−29.1% | Reduced |
| Fuller & Thaler Asset Management, Inc. | 1,273,017 | $78.7M | 0.40% | −2,197−0.2% | Reduced |
| Geode Capital Management, LLC | 846,652 | $52.4M | 0.01% | +37,026+4.6% | Added |
| TD Asset Management Inc | 793,559 | $49.1M | 0.05% | +649,001+449.0% | Added |
| Renaissance Technologies LLC | 641,900 | $39.7M | 0.06% | +38,800+6.4% | Added |
| Epoch Investment Partners, Inc. | 592,530 | $36.6M | 0.17% | +460,473+348.7% | Added |
| Price T Rowe Associates Inc | 586,957 | $36.3M | 0.00% | +17,245+3.0% | Added |
| Northern Trust Corp | 575,417 | $35.6M | 0.01% | +15,994+2.9% | Added |
| Morgan Stanley | 571,113 | $35.3M | 0.00% | +12,904+2.3% | Added |
| Invesco Ltd. | 400,889 | $24.8M | 0.01% | −9,740−2.4% | Reduced |
| Boone Capital Management LLC | 400,000 | $24.7M | 5.77% | +400,000 | New |
| Charles Schwab Investment Management Inc | 379,480 | $23.5M | 0.01% | +27,102+7.7% | Added |
| Granite Investment Partners, LLC | 365,340 | $22.6M | 0.88% | +34,429+10.4% | Added |
| Oberweis Asset Management Inc | 340,265 | $21.0M | 1.96% | +187,765+123.1% | Added |
| American Century Companies Inc | 337,690 | $20.9M | 0.01% | +137,413+68.6% | Added |
| Nordea Investment Management AB | 331,805 | $20.3M | 0.03% | −6,638−2.0% | Reduced |
| Bessemer Group Inc | 325,973 | $20.2M | 0.04% | +177,829+120.0% | Added |
| LSV Asset Management | 317,600 | $19.6M | 0.04% | +105,232+49.6% | Added |
| Bank of New York Mellon Corp | 313,338 | $19.4M | 0.00% | −13,169−4.0% | Reduced |
| Mesirow Institutional Investment Management, Inc. | 252,831 | $15.6M | 1.46% | +69,026+37.6% | Added |
| Victory Capital Management Inc | 237,474 | $14.7M | 0.02% | +213,014+870.9% | Added |
| Voloridge Investment Management, LLC | 228,669 | $14.1M | 0.06% | −142,641−38.4% | Reduced |
| Bank of America Corp | 215,532 | $13.3M | 0.00% | +80,700+59.9% | Added |
| Jacobs Levy Equity Management, Inc | 208,515 | $12.9M | 0.06% | −346,335−62.4% | Reduced |
| Millennium Management LLC | 205,017 | $12.7M | 0.01% | −91,290−30.8% | Reduced |
| Principal Financial Group Inc | 202,953 | $12.6M | 0.01% | −7,083−3.4% | Reduced |
| Nuveen Asset Management, LLC | 189,847 | $11.7M | 0.00% | −164,112−46.4% | Reduced |
| Janus Henderson Group PLC | 165,198 | $10.2M | 0.01% | +52,618+46.7% | Added |
| Portolan Capital Management, LLC | 148,416 | $9.18M | 0.80% | +15,566+11.7% | Added |
| Ameriprise Financial Inc | 139,255 | $8.61M | 0.00% | −10,414−7.0% | Reduced |
| Lam Group, Inc. | 130,800 | $8.09M | 7.36% | +2,800+2.2% | Added |
| Frontier Capital Management Co LLC | 127,537 | $7.89M | 0.08% | +211+0.2% | Added |
| Two Sigma Advisers, LP | 127,400 | $7.88M | 0.02% | +42,000+49.2% | Added |
| Citadel Advisors LLC | 116,199 | $7.19M | 0.01% | −12,516−9.7% | Reduced |
| Goldman Sachs Group Inc | 110,984 | $6.86M | 0.00% | −183,477−62.3% | Reduced |
| Legal & General Group Plc | 107,086 | $6.62M | 0.00% | +136+0.1% | Added |
| Beacon Harbor Wealth Advisors, Inc. | 103,140 | $6.38M | 1.85% | +450.0% | Added |
| Voya Investment Management LLC | 101,953 | $6.31M | 0.01% | +81,826+406.5% | Added |
| BNP Paribas Arbitrage, SA | 97,806 | $6.05M | 0.01% | −24,674−20.1% | Reduced |
| Hillsdale Investment Management Inc. | 96,353 | $5.96M | 0.49% | −195−0.2% | Reduced |
| Rhumbline Advisers | 93,740 | $5.80M | 0.01% | +228+0.2% | Added |
| Raymond James & Associates | 92,659 | $5.73M | 0.00% | +39,916+75.7% | Added |
| Mutual of America Capital Management LLC | 87,757 | $5.43M | 0.06% | −3,813−4.2% | Reduced |
| Squarepoint Ops LLC | 83,444 | $5.16M | 0.02% | −18,058−17.8% | Reduced |
| Silvercrest Asset Management Group LLC | 83,246 | $5.15M | 0.04% | 00.0% | Unchanged |
| Public Sector Pension Investment Board | 77,543 | $4.80M | 0.04% | +30,443+64.6% | Added |
| Swiss National Bank | 77,100 | $4.77M | 0.00% | −7,800−9.2% | Reduced |
| D. E. Shaw & Co., Inc. | 77,080 | $4.77M | 0.01% | −23,093−23.1% | Reduced |
| Alliancebernstein L.P. | 76,890 | $4.76M | 0.00% | −55,060−41.7% | Reduced |
| JPMorgan Chase & Co | 74,225 | $4.59M | 0.00% | −6,324−7.9% | Reduced |
| UBS Group AG | 71,086 | $4.40M | 0.00% | +52,714+286.9% | Added |
| Russell Investments Group, Ltd. | 63,667 | $3.94M | 0.01% | −66,854−51.2% | Reduced |
| Barclays PLC | 63,242 | $3.91M | 0.00% | +39,449+165.8% | Added |
| Moody Aldrich Partners LLC | 63,114 | $3.90M | 0.70% | +63,114 | New |
| Clark Capital Management Group, Inc. | 62,242 | $3.85M | 0.03% | +4,237+7.3% | Added |
| Royal Bank of Canada | 56,301 | $3.48M | 0.00% | +50,512+872.6% | Added |
| Qube Research & Technologies Ltd | 55,404 | $3.43M | 0.01% | −46,920−45.9% | Reduced |
| New York State Common Retirement Fund | 53,688 | $3.32M | 0.00% | +5,361+11.1% | Added |
| Jane Street Group, LLC | 51,979 | $3.21M | 0.00% | +11,868+29.6% | Added |
| Credit Suisse AG | 51,312 | $3.17M | 0.00% | −175−0.3% | Reduced |
| Shaker Investments LLC | 49,078 | $3.04M | 1.41% | +28,283+136.0% | Added |
| Penserra Capital Management LLC | 48,749 | $3.02M | 0.06% | +48,749 | New |
| Renaissance Group LLC | 48,419 | $3.01M | 0.12% | +2,923+6.4% | Added |
| First Trust Advisors LP | 46,917 | $2.90M | 0.00% | −32,146−40.7% | Reduced |
| Cubist Systematic Strategies, LLC | 46,187 | $2.86M | 0.04% | −36,720−44.3% | Reduced |
| State of New Jersey Common Pension Fund D | 45,960 | $2.84M | 0.01% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 45,292 | $2.80M | 0.00% | −1,425−3.1% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 45,000 | $2.78M | 0.01% | 00.0% | Unchanged |
| Prudential Financial Inc | 43,009 | $2.66M | 0.00% | −1,596−3.6% | Reduced |
| State of Wisconsin Investment Board | 42,774 | $2.65M | 0.01% | −229−0.5% | Reduced |
| Two Sigma Investments, LP | 41,775 | $2.58M | 0.01% | −53,709−56.2% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 41,164 | $2.55M | 0.01% | +22,737+123.4% | Added |
| California State Teachers Retirement System | 41,155 | $2.55M | 0.00% | −1,368−3.2% | Reduced |
| Lisanti Capital Growth, LLC | 40,770 | $2.52M | 0.59% | +15,595+61.9% | Added |
| Allspring Global Investments Holdings, LLC | 39,886 | $2.47M | 0.00% | +32,850+466.9% | Added |
| Martingale Asset Management L P | 39,273 | $2.43M | 0.05% | −508−1.3% | Reduced |
| Trexquant Investment LP | 38,959 | $2.41M | 0.05% | +38,959 | New |
| SEI Investments Co | 37,283 | $2.31M | 0.00% | +10,727+40.4% | Added |
| Wells Fargo & Company | 36,662 | $2.27M | 0.00% | +8,439+29.9% | Added |
| Eagle Asset Management Inc | 36,042 | $2.23M | 0.01% | −1,659−4.4% | Reduced |
| Assetmark, Inc | 35,787 | $2.21M | 0.01% | +4,596+14.7% | Added |
| Bridge City Capital, LLC | 34,498 | $2.13M | 0.83% | +11,839+52.2% | Added |
| Thrivent Financial for Lutherans | 33,297 | $2.06M | 0.00% | −30,633−47.9% | Reduced |
| Texas Permanent School Fund | 32,280 | $2.00M | 0.02% | −84−0.3% | Reduced |
| AXA S.A. | 32,178 | $1.99M | 0.01% | −30,722−48.8% | Reduced |
| Citigroup Inc | 30,940 | $1.91M | 0.00% | −10,650−25.6% | Reduced |
| Great West Life Assurance Co | 30,893 | $1.91M | 0.00% | −2,424−7.3% | Reduced |
| Deutsche Bank AG | 30,686 | $1.90M | 0.00% | +9,280+43.4% | Added |
| Tucker Asset Management LLC | 27,956 | $1.73M | 0.43% | −994−3.4% | Reduced |
| New York State Teachers Retirement System | 27,341 | $1.69M | 0.00% | −200−0.7% | Reduced |
| Susquehanna International Group, LLP | 27,165 | $1.68M | 0.00% | −2,160−7.4% | Reduced |
| D.A. Davidson & Co. | 26,624 | $1.65M | 0.02% | −205−0.8% | Reduced |
| Franklin Resources Inc | 26,564 | $1.64M | 0.00% | −186−0.7% | Reduced |
| LPL Financial LLC | 23,231 | $1.44M | 0.00% | +2,603+12.6% | Added |
| Envestnet Asset Management Inc | 23,071 | $1.43M | 0.00% | +6,146+36.3% | Added |