AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 221 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q2 2022. The put-call ratio across all filers is 12.07 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2022 | $12,183,000 | +218.2% | 339,347 | +106.4% | 0.01% | +200.0% |
| Q4 2021 | $3,829,000 | +33.6% | 164,396 | +9.0% | 0.00% | 0.0% |
| Q3 2021 | $2,866,000 | -6.5% | 150,788 | -0.8% | 0.00% | 0.0% |
| Q2 2021 | $3,065,000 | +51.4% | 152,030 | +37.6% | 0.00% | +100.0% |
| Q1 2021 | $2,024,000 | +0.2% | 110,486 | +10.0% | 0.00% | 0.0% |
| Q4 2020 | $2,020,000 | -7.9% | 100,459 | -14.1% | 0.00% | -50.0% |
| Q3 2020 | $2,193,000 | -14.6% | 116,968 | +2.3% | 0.00% | 0.0% |
| Q2 2020 | $2,569,000 | +101.3% | 114,380 | +33.0% | 0.00% | +100.0% |
| Q1 2020 | $1,276,000 | -44.7% | 85,969 | -28.1% | 0.00% | -50.0% |
| Q4 2019 | $2,307,000 | -25.7% | 119,606 | -23.6% | 0.00% | -33.3% |
| Q3 2019 | $3,106,000 | -14.3% | 156,648 | -8.7% | 0.00% | 0.0% |
| Q2 2019 | $3,624,000 | +12.8% | 171,656 | +9.1% | 0.00% | 0.0% |
| Q1 2019 | $3,214,000 | -20.8% | 157,332 | -22.8% | 0.00% | -25.0% |
| Q4 2018 | $4,056,000 | +82.0% | 203,827 | +76.0% | 0.00% | +100.0% |
| Q3 2018 | $2,228,000 | +136.3% | 115,806 | +87.4% | 0.00% | +100.0% |
| Q2 2018 | $943,000 | -33.1% | 61,792 | -17.8% | 0.00% | 0.0% |
| Q1 2018 | $1,409,000 | +2.8% | 75,132 | +5.5% | 0.00% | 0.0% |
| Q4 2017 | $1,370,000 | +57.1% | 71,182 | +45.9% | 0.00% | 0.0% |
| Q3 2017 | $872,000 | +7.0% | 48,791 | +7.0% | 0.00% | 0.0% |
| Q2 2017 | $815,000 | +111.7% | 45,615 | +72.0% | 0.00% | 0.0% |
| Q1 2017 | $385,000 | -67.4% | 26,524 | -58.6% | 0.00% | -50.0% |
| Q4 2016 | $1,182,000 | +0.1% | 64,145 | +3.1% | 0.00% | 0.0% |
| Q3 2016 | $1,181,000 | +27.8% | 62,233 | +8.5% | 0.00% | +100.0% |
| Q2 2016 | $924,000 | +64.7% | 57,345 | +22.6% | 0.00% | 0.0% |
| Q1 2016 | $561,000 | -6.2% | 46,769 | +11.3% | 0.00% | 0.0% |
| Q4 2015 | $598,000 | +219.8% | 42,038 | +162.6% | 0.00% | – |
| Q3 2015 | $187,000 | – | 16,009 | – | 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% |