AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 213 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q1 2023. The put-call ratio across all filers is 0.26 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. | 128,000 | $5,886,720 | 5.78% |
| Beacon Harbor Wealth Advisors, Inc. | 103,095 | $4,741 | 1.58% |
| Capital Impact Advisors, LLC | 15,304 | $703,831 | 1.18% |
| Quantedge Capital Pte Ltd | 36,389 | $1,673,530 | 0.91% |
| Mesirow Institutional Investment Management, Inc. | 183,805 | $8,453,192 | 0.86% |
| Monashee Investment Management LLC | 39,461 | $1,814,811 | 0.76% |
| OBERWEIS ASSET MANAGEMENT INC/ | 152,500 | $7,013,475 | 0.74% |
| Granite Investment Partners, LLC | 330,911 | $15,218,597 | 0.64% |
| Portolan Capital Management | 132,850 | $6,109,772 | 0.57% |
| SHAKER INVESTMENTS LLC/OH | 20,795 | $956,362 | 0.53% |