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, Q1 2023
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Mar 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
- 218
- +6 vs. Q4 2022
- Shares held
- 30.2M
- +1.08M (+3.7%) vs. Q4 2022
- Total value
- $1.13B
- +$316.8M (+38.8%) vs. Q4 2022
- New holders
- 32
- 76 more added
- Sold out
- 26
- 82 more reduced
1 institution that held it in Q4 2022 haven't filed for Q1 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2022: 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, Q1 2023
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q4 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock Inc. | 6,567,076 | $246.3M | 0.01% | −471,693−6.7% | Reduced |
| Federated Hermes, Inc. | 3,386,613 | $127.0M | 0.32% | +102,396+3.1% | Added |
| Vanguard Group Inc | 2,651,605 | $99.4M | 0.00% | +29,798+1.1% | Added |
| Dimensional Fund Advisors LP | 1,917,571 | $71.9M | 0.02% | +51,027+2.7% | Added |
| State Street Corp | 1,359,495 | $51.0M | 0.00% | +985+0.1% | Added |
| Fuller & Thaler Asset Management, Inc. | 811,694 | $30.4M | 0.18% | +311,629+62.3% | Added |
| Geode Capital Management, LLC | 759,981 | $28.5M | 0.00% | +37,700+5.2% | Added |
| Northern Trust Corp | 649,228 | $24.3M | 0.00% | +211,281+48.2% | Added |
| Invesco Ltd. | 592,769 | $22.2M | 0.01% | −53,190−8.2% | Reduced |
| Granite Investment Partners, LLC | 536,821 | $20.1M | 0.84% | +536,821 | New |
| Morgan Stanley | 520,043 | $19.5M | 0.00% | −83,005−13.8% | Reduced |
| Renaissance Technologies LLC | 496,800 | $18.6M | 0.02% | +49,400+11.0% | Added |
| Price T Rowe Associates Inc | 468,420 | $17.6M | 0.00% | −320,750−40.6% | Reduced |
| Neuberger Berman Group LLC | 431,252 | $16.2M | 0.01% | +431,252 | New |
| Bank of New York Mellon Corp | 347,212 | $13.0M | 0.00% | +1,196+0.3% | Added |
| Millennium Management LLC | 343,560 | $12.9M | 0.01% | +246,130+252.6% | Added |
| Portolan Capital Management, LLC | 340,593 | $12.8M | 1.22% | +69,802+25.8% | Added |
| Nordea Investment Management AB | 330,213 | $12.5M | 0.02% | −7,214−2.1% | Reduced |
| Charles Schwab Investment Management Inc | 329,913 | $12.4M | 0.00% | +3,125+1.0% | Added |
| Mesirow Institutional Investment Management, Inc. | 325,669 | $12.2M | 1.33% | −48,745−13.0% | Reduced |
| Nuveen Asset Management, LLC | 318,324 | $11.9M | 0.00% | −65,681−17.1% | Reduced |
| Eagle Asset Management Inc | 306,770 | $11.5M | 0.07% | +5,897+2.0% | Added |
| Bank of America Corp | 290,737 | $10.9M | 0.00% | +225,728+347.2% | Added |
| Principal Financial Group Inc | 232,740 | $8.73M | 0.01% | −6,212−2.6% | Reduced |
| Goldman Sachs Group Inc | 221,675 | $8.31M | 0.00% | −45,592−17.1% | Reduced |
| Frontier Capital Management Co LLC | 187,060 | $7.01M | 0.07% | −16,911−8.3% | Reduced |
| Oberweis Asset Management Inc | 178,200 | $6.68M | 1.04% | +44,200+33.0% | Added |
| Ameriprise Financial Inc | 169,239 | $6.35M | 0.00% | −5,581−3.2% | Reduced |
| Assenagon Asset Management S.A. | 169,056 | $6.34M | 0.02% | −4,423−2.5% | Reduced |
| Hillsdale Investment Management Inc. | 155,038 | $5.81M | 0.50% | −17,200−10.0% | Reduced |
| Silvercrest Asset Management Group LLC | 154,868 | $5.81M | 0.04% | −68,290−30.6% | Reduced |
| AXA S.A. | 151,855 | $5.69M | 0.02% | +2,449+1.6% | Added |
| D. E. Shaw & Co., Inc. | 137,313 | $5.15M | 0.01% | +79,365+137.0% | Added |
| Lam Group, Inc. | 130,250 | $4.88M | 4.79% | 00.0% | Unchanged |
| Jacobs Levy Equity Management, Inc | 126,381 | $4.74M | 0.03% | −64,291−33.7% | Reduced |
| American Century Companies Inc | 120,821 | $4.55M | 0.00% | +82,021+211.4% | Added |
| JPMorgan Chase & Co | 117,767 | $4.42M | 0.00% | +4,014+3.5% | Added |
| Mutual of America Capital Management LLC | 111,123 | $4.17M | 0.05% | −4,904−4.2% | Reduced |
| AQR Capital Management LLC | 110,887 | $4.16M | 0.01% | −1,716−1.5% | Reduced |
| Janus Henderson Group PLC | 103,941 | $3.90M | 0.00% | +96,226+1,247.3% | Added |
| Allspring Global Investments Holdings, LLC | 100,045 | $3.75M | 0.01% | −10,320−9.4% | Reduced |
| Legal & General Group Plc | 94,762 | $3.55M | 0.00% | +2,172+2.3% | Added |
| Rhumbline Advisers | 90,967 | $3.41M | 0.00% | +6,609+7.8% | Added |
| Globeflex Capital L P | 89,192 | $3.34M | 0.41% | +23,070+34.9% | Added |
| Swiss National Bank | 83,400 | $3.13M | 0.00% | −11,200−11.8% | Reduced |
| Shaker Investments LLC | 82,253 | $3.08M | 1.72% | +966+1.2% | Added |
| Arrowstreet Capital, Limited Partnership | 74,274 | $2.79M | 0.00% | −91,766−55.3% | Reduced |
| Voloridge Investment Management, LLC | 72,944 | $2.74M | 0.01% | −21,677−22.9% | Reduced |
| Public Sector Pension Investment Board | 66,302 | $2.49M | 0.02% | −2,282−3.3% | Reduced |
| Point72 Asset Management, L.P. | 65,418 | $2.45M | 0.01% | +65,418 | New |
| Marshall Wace, LLP | 64,209 | $2.41M | 0.01% | +64,209 | New |
| Cubist Systematic Strategies, LLC | 59,974 | $2.25M | 0.02% | +46,014+329.6% | Added |
| New York State Common Retirement Fund | 59,786 | $2.24M | 0.00% | +31,253+109.5% | Added |
| Two Sigma Advisers, LP | 59,100 | $2.22M | 0.01% | −21,300−26.5% | Reduced |
| Credit Suisse AG | 57,956 | $2.17M | 0.00% | +2,246+4.0% | Added |
| Trexquant Investment LP | 56,504 | $2.12M | 0.06% | +20,319+56.2% | Added |
| California State Teachers Retirement System | 48,216 | $1.81M | 0.00% | −1,193−2.4% | Reduced |
| Renaissance Group LLC | 46,859 | $1.76M | 0.08% | +2,263+5.1% | Added |
| Exchange Traded Concepts, LLC | 46,583 | $1.75M | 0.05% | +9,431+25.4% | Added |
| D.A. Davidson & Co. | 45,074 | $1.69M | 0.02% | −3,837−7.8% | Reduced |
| Alliancebernstein L.P. | 44,897 | $1.68M | 0.00% | −35,547−44.2% | Reduced |
| Victory Capital Management Inc | 43,738 | $1.64M | 0.00% | +6,646+17.9% | Added |
| Susquehanna International Group, LLP | 42,377 | $1.59M | 0.00% | +42,377 | New |
| Martingale Asset Management L P | 42,168 | $1.58M | 0.03% | −3,980−8.6% | Reduced |
| Barclays PLC | 41,314 | $1.55M | 0.00% | −21,616−34.3% | Reduced |
| First Trust Advisors LP | 40,333 | $1.51M | 0.00% | −24,656−37.9% | Reduced |
| Aviva PLC | 39,959 | $1.50M | 0.01% | +16,636+71.3% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 39,916 | $1.50M | 0.01% | −430−1.1% | Reduced |
| UBS Asset Management Americas Inc | 39,051 | $1.46M | 0.00% | −5,036−11.4% | Reduced |
| Thrivent Financial for Lutherans | 37,359 | $1.40M | 0.00% | −1,310−3.4% | Reduced |
| Summit Global Investments | 37,300 | $1.40M | 0.11% | +7,800+26.4% | Added |
| Prudential Financial Inc | 37,117 | $1.39M | 0.00% | −69,616−65.2% | Reduced |
| Russell Investments Group, Ltd. | 36,216 | $1.36M | 0.00% | −36,886−50.5% | Reduced |
| Great West Life Assurance Co | 35,490 | $1.33M | 0.00% | −2,475−6.5% | Reduced |
| State of Wisconsin Investment Board | 35,239 | $1.32M | 0.00% | −4,052−10.3% | Reduced |
| Cornercap Investment Counsel Inc | 35,233 | $1.32M | 0.23% | −5,813−14.2% | Reduced |
| Texas Permanent School Fund | 33,808 | $1.27M | 0.01% | +8,464+33.4% | Added |
| Allianz Asset Management GmbH | 33,600 | $1.26M | 0.00% | −24,145−41.8% | Reduced |
| Truist Financial Corp | 33,404 | $1.25M | 0.00% | +4,836+16.9% | Added |
| LSV Asset Management | 33,200 | $1.25M | 0.00% | +22,500+210.3% | Added |
| HRT Financial LP | 31,947 | $1.20M | 0.01% | +14,254+80.6% | Added |
| BNP Paribas Arbitrage, SA | 31,798 | $1.19M | 0.00% | +23,345+276.2% | Added |
| Tucker Asset Management LLC | 31,672 | $1.19M | 0.36% | +31,672 | New |
| Citadel Advisors LLC | 31,341 | $1.18M | 0.00% | −11,166−26.3% | Reduced |
| Algert Global LLC | 30,320 | $1.14M | 0.05% | +21,667+250.4% | Added |
| FMR LLC | 30,155 | $1.13M | 0.00% | +847+2.9% | Added |
| Assetmark, Inc | 29,673 | $1.11M | 0.00% | +1,727+6.2% | Added |
| Deutsche Bank AG | 28,690 | $1.08M | 0.00% | +7,545+35.7% | Added |
| Jane Street Group, LLC | 28,343 | $1.06M | 0.00% | +20,094+243.6% | Added |
| Ziegler Capital Management, LLC | 27,637 | $1.04M | 0.04% | +270+1.0% | Added |
| Virginia Retirement Systems Et Al | 26,900 | $1.01M | 0.01% | +1,300+5.1% | Added |
| Los Angeles Capital Management LLC | 26,475 | $992.8K | 0.00% | +16,475+164.8% | Added |
| New York State Teachers Retirement System | 26,174 | $982.0K | 0.00% | −2,213−7.8% | Reduced |
| Jackson Creek Investment Advisors LLC | 25,877 | $970.0K | 0.41% | +25,877 | New |
| State of Alaska, Department of Revenue | 25,815 | $968.0K | 0.01% | −353−1.3% | Reduced |
| Winton Group Ltd | 25,787 | $967.0K | 0.06% | −5,831−18.4% | Reduced |
| Citigroup Inc | 24,749 | $928.1K | 0.00% | −6,998−22.0% | Reduced |
| Raymond James & Associates | 23,561 | $883.5K | 0.00% | +483+2.1% | Added |
| Walleye Capital LLC | 23,231 | $871.2K | 0.02% | +23,231 | New |
| UBS Group AG | 22,990 | $862.1K | 0.00% | +5,916+34.6% | Added |