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 | $742,739 | +123483.9% | 16,150 | -22.2% | 0.00% | -20.0% |
| Q4 2022 | $601 | -99.9% | 20,752 | -24.8% | 0.01% | -28.6% |
| Q3 2022 | $852,000 | -23.2% | 27,592 | -8.9% | 0.01% | -22.2% |
| Q2 2022 | $1,109,000 | -6.0% | 30,272 | +0.3% | 0.01% | 0.0% |
| Q1 2022 | $1,180,000 | +37.2% | 30,182 | -12.6% | 0.01% | +50.0% |
| Q4 2021 | $860,000 | +40.3% | 34,517 | +8.1% | 0.01% | +50.0% |
| Q3 2021 | $613,000 | +0.5% | 31,927 | -2.2% | 0.00% | 0.0% |
| Q2 2021 | $610,000 | -0.7% | 32,650 | -7.8% | 0.00% | 0.0% |
| Q1 2021 | $614,000 | -10.9% | 35,429 | -3.9% | 0.00% | 0.0% |
| Q4 2020 | $689,000 | -10.3% | 36,857 | -0.0% | 0.00% | -33.3% |
| Q3 2020 | $768,000 | +7.9% | 36,868 | +6.8% | 0.01% | +20.0% |
| Q2 2020 | $712,000 | +27.6% | 34,533 | +3.6% | 0.01% | 0.0% |
| Q1 2020 | $558,000 | -11.8% | 33,334 | +1.9% | 0.01% | 0.0% |
| Q4 2019 | $633,000 | -0.9% | 32,728 | -0.0% | 0.01% | 0.0% |
| Q3 2019 | $639,000 | -3.8% | 32,742 | -1.2% | 0.01% | 0.0% |
| Q2 2019 | $664,000 | -9.0% | 33,155 | -4.5% | 0.01% | -16.7% |
| Q1 2019 | $730,000 | -2.7% | 34,703 | +2.1% | 0.01% | 0.0% |
| Q4 2018 | $750,000 | +20.6% | 33,981 | -0.4% | 0.01% | +20.0% |
| Q3 2018 | $622,000 | -0.5% | 34,120 | -10.4% | 0.01% | +25.0% |
| Q2 2018 | $625,000 | -13.3% | 38,063 | +2.8% | 0.00% | -20.0% |
| Q1 2018 | $721,000 | +2.1% | 37,028 | +1.3% | 0.01% | 0.0% |
| Q4 2017 | $706,000 | +3.8% | 36,536 | -2.5% | 0.01% | 0.0% |
| Q3 2017 | $680,000 | +2.3% | 37,490 | -0.0% | 0.01% | 0.0% |
| Q2 2017 | $665,000 | +10.8% | 37,492 | -5.4% | 0.01% | 0.0% |
| Q1 2017 | $600,000 | -8.0% | 39,612 | +4.1% | 0.01% | 0.0% |
| Q4 2016 | $652,000 | -3.6% | 38,042 | +7.4% | 0.01% | -16.7% |
| Q3 2016 | $676,000 | – | 35,414 | – | 0.01% | – |
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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% |