AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 241 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q2 2023. The put-call ratio across all filers is 0.69 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $6,813 | +37750.0% | 148,144 | +46195.0% | 0.02% | – |
| Q2 2023 | $18 | +260.0% | 320 | +131.9% | 0.00% | – |
| Q1 2023 | $5 | +66.7% | 138 | +21.1% | 0.00% | – |
| Q4 2022 | $3 | -99.9% | 114 | 0.0% | 0.00% | – |
| Q3 2022 | $3,000 | -50.0% | 114 | -29.6% | 0.00% | – |
| Q2 2022 | $6,000 | 0.0% | 162 | 0.0% | 0.00% | – |
| Q1 2022 | $6,000 | -99.8% | 162 | -99.9% | 0.00% | -100.0% |
| Q2 2020 | $2,507,000 | +51.4% | 111,600 | 0.0% | 0.01% | +14.3% |
| Q1 2020 | $1,656,000 | -22.4% | 111,600 | +0.8% | 0.01% | 0.0% |
| Q4 2019 | $2,135,000 | +2.4% | 110,700 | +5.3% | 0.01% | 0.0% |
| Q3 2019 | $2,084,000 | +0.2% | 105,100 | +6.7% | 0.01% | 0.0% |
| Q2 2019 | $2,079,000 | +1.9% | 98,500 | -1.4% | 0.01% | -12.5% |
| Q1 2019 | $2,041,000 | +45.5% | 99,900 | +41.7% | 0.01% | +33.3% |
| Q4 2018 | $1,403,000 | +126.3% | 70,500 | +118.9% | 0.01% | +200.0% |
| Q3 2018 | $620,000 | +248.3% | 32,200 | +242.6% | 0.00% | +100.0% |
| Q3 2016 | $178,000 | – | 9,400 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| LAM GROUP, INC. | 130,250 | $4,884,375 | 4.79% |
| SHAKER INVESTMENTS LLC/OH | 82,253 | $3,084,488 | 1.72% |
| Mesirow Institutional Investment Management, Inc. | 325,669 | $12,212,588 | 1.33% |
| Portolan Capital Management | 340,593 | $12,772,238 | 1.22% |
| OBERWEIS ASSET MANAGEMENT INC/ | 178,200 | $6,682,500 | 1.04% |
| Granite Investment Partners, LLC | 536,821 | $20,130,788 | 0.84% |
| Capital Impact Advisors, LLC | 15,304 | $573,900 | 0.70% |
| Hillsdale Investment Management Inc. | 155,038 | $5,813,926 | 0.50% |
| GLOBEFLEX CAPITAL L P | 89,192 | $3,344,700 | 0.41% |
| Jackson Creek Investment Advisors LLC | 25,877 | $970 | 0.41% |