AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 250 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q3 2023. The put-call ratio across all filers is 1.02 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $6,002,659 | +184.6% | 130,521 | +255.6% | 0.01% | +200.0% |
| Q2 2023 | $2,109,378 | +55.3% | 36,704 | +1.3% | 0.00% | +33.3% |
| Q1 2023 | $1,358,099 | -33.7% | 36,216 | -50.5% | 0.00% | -25.0% |
| Q4 2022 | $2,048,316 | +2.2% | 73,102 | +2.4% | 0.00% | 0.0% |
| Q3 2022 | $2,004,000 | -74.7% | 71,394 | -68.7% | 0.00% | -75.0% |
| Q2 2022 | $7,922,000 | +43.0% | 227,809 | +47.6% | 0.02% | +60.0% |
| Q1 2022 | $5,538,000 | +85.5% | 154,339 | +20.4% | 0.01% | +100.0% |
| Q4 2021 | $2,985,000 | -6.7% | 128,221 | -23.9% | 0.01% | 0.0% |
| Q3 2021 | $3,199,000 | +45600.0% | 168,405 | +42970.3% | 0.01% | – |
| Q2 2021 | $7,000 | -98.9% | 391 | -98.9% | 0.00% | -100.0% |
| Q1 2021 | $657,000 | +284.2% | 35,898 | +317.5% | 0.00% | – |
| Q4 2020 | $171,000 | +6.9% | 8,599 | 0.0% | 0.00% | – |
| Q3 2020 | $160,000 | -60.7% | 8,599 | -52.6% | 0.00% | -100.0% |
| Q2 2020 | $407,000 | +253.9% | 18,156 | +132.8% | 0.00% | – |
| Q1 2020 | $115,000 | -63.7% | 7,800 | -51.2% | 0.00% | -100.0% |
| Q3 2019 | $317,000 | -32.8% | 16,000 | -28.6% | 0.00% | 0.0% |
| Q2 2019 | $472,000 | +19.8% | 22,400 | +16.1% | 0.00% | 0.0% |
| Q1 2019 | $394,000 | +4.5% | 19,300 | +1.7% | 0.00% | 0.0% |
| Q4 2018 | $377,000 | +292.7% | 18,971 | +281.6% | 0.00% | – |
| Q3 2018 | $96,000 | -51.8% | 4,971 | -62.0% | 0.00% | – |
| Q2 2018 | $199,000 | -78.2% | 13,071 | -73.5% | 0.00% | -100.0% |
| Q1 2018 | $911,000 | -26.4% | 49,320 | -21.3% | 0.00% | 0.0% |
| Q4 2017 | $1,237,000 | +0.2% | 62,640 | -9.4% | 0.00% | 0.0% |
| Q3 2017 | $1,235,000 | -4.6% | 69,127 | -4.6% | 0.00% | 0.0% |
| Q2 2017 | $1,295,000 | -40.5% | 72,466 | -51.7% | 0.00% | -50.0% |
| Q1 2017 | $2,176,000 | -62.7% | 150,090 | -52.7% | 0.00% | -63.6% |
| Q4 2016 | $5,829,000 | – | 317,135 | – | 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% |