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 | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $13,627,159 | +3.9% | 296,307 | +29.8% | 0.01% | +16.7% |
| Q2 2023 | $13,116,378 | +101703.6% | 228,230 | -33.6% | 0.01% | -14.3% |
| Q1 2023 | $12,884 | +371.9% | 343,560 | +252.6% | 0.01% | +250.0% |
| Q4 2022 | $2,730 | -99.3% | 97,430 | +608.1% | 0.00% | – |
| Q3 2022 | $387,000 | -86.4% | 13,760 | -83.2% | 0.00% | -100.0% |
| Q2 2022 | $2,854,000 | -54.1% | 82,041 | -52.7% | 0.00% | -33.3% |
| Q1 2022 | $6,222,000 | +265.1% | 173,321 | +136.8% | 0.00% | +200.0% |
| Q4 2021 | $1,704,000 | -54.5% | 73,181 | -62.8% | 0.00% | -50.0% |
| Q3 2021 | $3,744,000 | +1024.3% | 196,938 | +1092.8% | 0.00% | – |
| Q2 2021 | $333,000 | -84.8% | 16,510 | -86.2% | 0.00% | -100.0% |
| Q1 2021 | $2,193,000 | -39.3% | 119,695 | -33.4% | 0.00% | -33.3% |
| Q4 2020 | $3,614,000 | +51.2% | 179,693 | +41.0% | 0.00% | 0.0% |
| Q3 2020 | $2,390,000 | +142.6% | 127,465 | +190.8% | 0.00% | +200.0% |
| Q2 2020 | $985,000 | -8.3% | 43,834 | -19.1% | 0.00% | -50.0% |
| Q3 2019 | $1,074,000 | +244.2% | 54,180 | +266.3% | 0.00% | – |
| Q2 2019 | $312,000 | -25.7% | 14,791 | -28.0% | 0.00% | -100.0% |
| Q1 2019 | $420,000 | -85.0% | 20,537 | -85.4% | 0.00% | -75.0% |
| Q4 2018 | $2,796,000 | +72.0% | 140,507 | +66.3% | 0.00% | +100.0% |
| Q3 2018 | $1,626,000 | +176.5% | 84,506 | +119.4% | 0.00% | +100.0% |
| Q2 2018 | $588,000 | -28.1% | 38,520 | -11.7% | 0.00% | 0.0% |
| Q1 2018 | $818,000 | -85.5% | 43,626 | -85.1% | 0.00% | -87.5% |
| Q4 2017 | $5,650,000 | +1889.4% | 293,672 | +1746.9% | 0.01% | – |
| Q3 2017 | $284,000 | -4.7% | 15,901 | -4.8% | 0.00% | -100.0% |
| Q2 2017 | $298,000 | -36.6% | 16,701 | -57.3% | 0.00% | 0.0% |
| Q1 2016 | $470,000 | -76.1% | 39,142 | -71.6% | 0.00% | -75.0% |
| Q4 2015 | $1,963,000 | +199.7% | 137,949 | +146.2% | 0.00% | +300.0% |
| Q3 2015 | $655,000 | -69.6% | 56,037 | -54.4% | 0.00% | -75.0% |
| Q2 2015 | $2,158,000 | +70.7% | 122,772 | +45.3% | 0.00% | +100.0% |
| Q1 2015 | $1,264,000 | +311.7% | 84,475 | +219.7% | 0.00% | +100.0% |
| Q4 2014 | $307,000 | – | 26,422 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| LAM GROUP, INC. | 130,250 | $3,649,605 | 3.75% |
| SHAKER INVESTMENTS LLC/OH | 81,287 | $2,277,662 | 1.41% |
| Mesirow Institutional Investment Management, Inc. | 374,414 | $10,491,080 | 1.38% |
| OBERWEIS ASSET MANAGEMENT INC/ | 134,000 | $3,754,680 | 0.80% |
| Portolan Capital Management | 270,791 | $7,587,564 | 0.75% |
| Hillsdale Investment Management Inc. | 172,238 | $4,826,109 | 0.41% |
| Capital Impact Advisors, LLC | 14,669 | $411,025 | 0.40% |
| Watershed Asset Management, L.L.C. | 9,555 | $267,731 | 0.34% |
| Quantedge Capital Pte Ltd | 35,153 | $984,987 | 0.33% |
| FEDERATED HERMES, INC. | 3,284,217 | $92,023,760 | 0.25% |