AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 204 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q1 2022. The put-call ratio across all filers is 16.41 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2023 | $14,213 | +33.8% | 379 | 0.0% | 0.00% | +100.0% |
| Q4 2022 | $10,620 | -3.5% | 379 | 0.0% | 0.00% | -50.0% |
| Q3 2022 | $11,000 | -35.3% | 379 | -20.9% | 0.00% | -33.3% |
| Q2 2022 | $17,000 | +6.2% | 479 | +10.9% | 0.00% | +50.0% |
| Q1 2022 | $16,000 | +77.8% | 432 | +14.0% | 0.00% | +100.0% |
| Q4 2021 | $9,000 | +28.6% | 379 | 0.0% | 0.00% | 0.0% |
| Q3 2021 | $7,000 | -12.5% | 379 | 0.0% | 0.00% | 0.0% |
| Q2 2021 | $8,000 | +14.3% | 379 | 0.0% | 0.00% | -66.7% |
| Q1 2021 | $7,000 | +75.0% | 379 | +96.4% | 0.00% | +50.0% |
| Q3 2019 | $4,000 | -33.3% | 193 | -29.0% | 0.00% | -33.3% |
| Q2 2019 | $6,000 | 0.0% | 272 | -12.8% | 0.00% | 0.0% |
| Q1 2019 | $6,000 | -14.3% | 312 | -6.6% | 0.00% | 0.0% |
| Q4 2018 | $7,000 | 0.0% | 334 | -3.5% | 0.00% | 0.0% |
| Q3 2018 | $7,000 | +75.0% | 346 | +20.6% | 0.00% | +50.0% |
| Q2 2018 | $4,000 | – | 287 | – | 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% |