AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 167 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q4 2021. The put-call ratio across all filers is - and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $267,000 | -81.7% | 5,789 | -77.3% | 0.00% | – |
| Q2 2023 | $1,463,000 | +881.9% | 25,449 | +538.0% | 0.00% | – |
| Q1 2023 | $149,000 | -38.9% | 3,989 | -54.5% | 0.00% | – |
| Q4 2022 | $244,000 | +117.9% | 8,766 | +118.5% | 0.00% | – |
| Q3 2022 | $112,000 | -4.3% | 4,011 | +19.1% | 0.00% | – |
| Q2 2022 | $117,000 | -87.7% | 3,367 | -87.3% | 0.00% | – |
| Q1 2022 | $954,000 | +448.3% | 26,585 | +257.2% | 0.00% | – |
| Q4 2021 | $174,000 | +100.0% | 7,443 | +64.5% | 0.00% | – |
| Q3 2021 | $87,000 | +22.5% | 4,524 | +28.0% | 0.00% | – |
| Q2 2021 | $71,000 | +294.4% | 3,534 | +253.4% | 0.00% | – |
| Q1 2021 | $18,000 | -94.1% | 1,000 | -93.4% | 0.00% | – |
| Q4 2020 | $307,000 | +8.1% | 15,261 | +0.7% | 0.00% | – |
| Q3 2020 | $284,000 | -6.9% | 15,161 | +11.7% | 0.00% | – |
| Q2 2020 | $305,000 | +45.9% | 13,579 | -3.4% | 0.00% | – |
| Q1 2020 | $209,000 | +770.8% | 14,050 | +1008.0% | 0.00% | – |
| Q4 2019 | $24,000 | -29.4% | 1,268 | -25.4% | 0.00% | – |
| Q3 2019 | $34,000 | -8.1% | 1,700 | -2.0% | 0.00% | – |
| Q2 2019 | $37,000 | +5.7% | 1,735 | +1.9% | 0.00% | – |
| Q1 2019 | $35,000 | -52.7% | 1,703 | -54.0% | 0.00% | – |
| Q4 2018 | $74,000 | -22.9% | 3,700 | -26.1% | 0.00% | – |
| Q3 2018 | $96,000 | +585.7% | 5,005 | +456.1% | 0.00% | – |
| Q2 2018 | $14,000 | -17.6% | 900 | -2.4% | 0.00% | – |
| Q1 2018 | $17,000 | 0.0% | 922 | +2.4% | 0.00% | – |
| Q4 2017 | $17,000 | -70.2% | 900 | -72.0% | 0.00% | – |
| Q3 2017 | $57,000 | +256.2% | 3,217 | +252.4% | 0.00% | – |
| Q2 2017 | $16,000 | +6.7% | 913 | -9.2% | 0.00% | – |
| Q1 2017 | $15,000 | -94.4% | 1,006 | -93.0% | 0.00% | – |
| Q4 2016 | $267,000 | +19.2% | 14,474 | +22.5% | 0.00% | – |
| Q3 2016 | $224,000 | +761.5% | 11,819 | +650.9% | 0.00% | – |
| Q2 2016 | $26,000 | +271.4% | 1,574 | +162.3% | 0.00% | – |
| Q1 2016 | $7,000 | +600.0% | 600 | +659.5% | 0.00% | – |
| Q4 2015 | $1,000 | -90.0% | 79 | -91.3% | 0.00% | – |
| Q3 2015 | $10,000 | -64.3% | 907 | -42.7% | 0.00% | – |
| Q2 2015 | $28,000 | -3.4% | 1,582 | -37.1% | 0.00% | – |
| Q4 2014 | $29,000 | 0.0% | 2,516 | +0.6% | 0.00% | – |
| Q3 2014 | $29,000 | – | 2,500 | – | 0.00% | – |
Download | ||||||
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% |