AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 167 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q4 2021. The put-call ratio across all filers is - and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $803 | +60.3% | 45,447 | +421.4% | 0.00% | 0.0% |
| Q2 2023 | $501 | +19.0% | 8,717 | -22.4% | 0.00% | 0.0% |
| Q1 2023 | $421 | +33.7% | 11,238 | 0.0% | 0.00% | 0.0% |
| Q4 2022 | $315 | -99.9% | 11,238 | 0.0% | 0.00% | 0.0% |
| Q3 2022 | $316,000 | -19.2% | 11,238 | 0.0% | 0.00% | 0.0% |
| Q2 2022 | $391,000 | -3.0% | 11,238 | 0.0% | 0.00% | 0.0% |
| Q1 2022 | $403,000 | +25.9% | 11,238 | -18.1% | 0.00% | +100.0% |
| Q4 2021 | $320,000 | +22.6% | 13,727 | 0.0% | 0.00% | 0.0% |
| Q3 2021 | $261,000 | -5.8% | 13,727 | 0.0% | 0.00% | 0.0% |
| Q2 2021 | $277,000 | +10.4% | 13,727 | 0.0% | 0.00% | 0.0% |
| Q1 2021 | $251,000 | -9.1% | 13,727 | 0.0% | 0.00% | 0.0% |
| Q4 2020 | $276,000 | +7.4% | 13,727 | 0.0% | 0.00% | 0.0% |
| Q3 2020 | $257,000 | -16.6% | 13,727 | 0.0% | 0.00% | -50.0% |
| Q2 2020 | $308,000 | +51.0% | 13,727 | 0.0% | 0.00% | +100.0% |
| Q1 2020 | $204,000 | -23.0% | 13,727 | 0.0% | 0.00% | 0.0% |
| Q4 2019 | $265,000 | -2.6% | 13,727 | 0.0% | 0.00% | -50.0% |
| Q3 2019 | $272,000 | -6.2% | 13,727 | 0.0% | 0.00% | 0.0% |
| Q2 2019 | $290,000 | -53.9% | 13,727 | -55.4% | 0.00% | -50.0% |
| Q1 2019 | $629,000 | – | 30,788 | – | 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% |