AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 211 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q4 2022. The put-call ratio across all filers is 0.20 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $385,616 | -37.0% | 8,385 | -21.3% | 0.00% | 0.0% |
| Q2 2023 | $612,182 | +836.1% | 10,656 | +511.0% | 0.00% | – |
| Q1 2023 | $65,399 | +39.1% | 1,744 | +2.5% | 0.00% | – |
| Q4 2022 | $47,000 | -6.0% | 1,702 | -5.5% | 0.00% | – |
| Q3 2022 | $50,000 | -61.2% | 1,801 | -51.4% | 0.00% | – |
| Q2 2022 | $129,000 | -88.3% | 3,708 | -87.6% | 0.00% | -100.0% |
| Q1 2022 | $1,103,000 | +1942.6% | 29,894 | +1193.6% | 0.00% | – |
| Q4 2021 | $54,000 | +390.9% | 2,311 | +314.2% | 0.00% | – |
| Q3 2021 | $11,000 | -31.2% | 558 | -29.7% | 0.00% | – |
| Q2 2021 | $16,000 | +1500.0% | 794 | +1664.4% | 0.00% | – |
| Q1 2021 | $1,000 | 0.0% | 45 | 0.0% | 0.00% | – |
| Q4 2020 | $1,000 | -90.0% | 45 | -90.8% | 0.00% | – |
| Q3 2020 | $10,000 | -28.6% | 490 | -23.7% | 0.00% | – |
| Q2 2020 | $14,000 | -12.5% | 642 | -40.3% | 0.00% | – |
| Q1 2020 | $16,000 | – | 1,075 | – | 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% |