SPERO THERAPEUTICS INC's ticker is SPRO and the CUSIP is 84833T103. A total of 96 filers reported holding SPERO THERAPEUTICS INC in Q1 2021. The put-call ratio across all filers is 1.92 and the average weighting 0.2%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2022 | $19,000 | -45.7% | 2,215 | 0.0% | 0.00% | 0.0% |
| Q4 2021 | $35,000 | -14.6% | 2,215 | 0.0% | 0.00% | 0.0% |
| Q3 2021 | $41,000 | +32.3% | 2,215 | 0.0% | 0.00% | 0.0% |
| Q2 2021 | $31,000 | -6.1% | 2,215 | 0.0% | 0.00% | 0.0% |
| Q1 2021 | $33,000 | -23.3% | 2,215 | 0.0% | 0.00% | -50.0% |
| Q4 2020 | $43,000 | +72.0% | 2,215 | 0.0% | 0.00% | +100.0% |
| Q3 2020 | $25,000 | -16.7% | 2,215 | 0.0% | 0.00% | 0.0% |
| Q2 2020 | $30,000 | – | 2,215 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Atlas Venture Associates IX, LLC | 1,376,968 | $17,639,000 | 16.57% |
| Aquilo Capital Management, LLC | 1,054,356 | $13,506,000 | 5.98% |
| VHCP Management II, LLC | 474,015 | $6,072,000 | 1.78% |
| AWM Investment Company, Inc. | 562,296 | $7,203,000 | 1.42% |
| Alphabet Inc. | 1,112,473 | $14,251,000 | 0.74% |
| BVF INC/IL | 460,706 | $5,902,000 | 0.66% |
| DAFNA Capital Management LLC | 70,000 | $897,000 | 0.39% |
| Artal Group S.A. | 600,000 | $7,686,000 | 0.31% |
| Rock Springs Capital Management LP | 525,000 | $6,725,000 | 0.26% |
| Orbimed Advisors | 507,471 | $6,501,000 | 0.10% |