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 | ||||
|---|---|---|---|---|---|---|
| Q4 2022 | $459,472 | -50.3% | 16,398 | -50.2% | 0.00% | -50.0% |
| Q3 2022 | $924,000 | +241.0% | 32,900 | +321.8% | 0.01% | +166.7% |
| Q2 2022 | $271,000 | -66.4% | 7,800 | -65.3% | 0.00% | -57.1% |
| Q1 2022 | $807,000 | -40.4% | 22,500 | -67.9% | 0.01% | -78.8% |
| Q4 2019 | $1,354,000 | +278.2% | 70,179 | +312.8% | 0.03% | +153.8% |
| Q2 2019 | $358,000 | -59.7% | 17,000 | -60.9% | 0.01% | -58.1% |
| Q1 2019 | $888,000 | +88.9% | 43,500 | +70.2% | 0.03% | -49.2% |
| Q4 2016 | $470,000 | – | 25,561 | – | 0.06% | – |
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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% |