SPERO THERAPEUTICS INC's ticker is SPRO and the CUSIP is 84833T103. A total of 86 filers reported holding SPERO THERAPEUTICS INC in Q4 2021. The put-call ratio across all filers is 0.92 and the average weighting 0.3%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $117 | -96.4% | 97 | -95.6% | 0.00% | – |
| Q2 2023 | $3,258 | -33.0% | 2,189 | -29.9% | 0.00% | – |
| Q1 2023 | $4,863 | -2.7% | 3,124 | +1.5% | 0.00% | – |
| Q4 2022 | $5,000 | -90.0% | 3,077 | -87.6% | 0.00% | – |
| Q3 2022 | $50,000 | +2400.0% | 24,817 | +787.9% | 0.00% | – |
| Q2 2022 | $2,000 | -99.9% | 2,795 | +155.3% | 0.00% | -100.0% |
| Q1 2022 | $3,472,000 | +20323.5% | 1,095 | -2.7% | 0.01% | – |
| Q4 2021 | $17,000 | -63.0% | 1,125 | -55.8% | 0.00% | – |
| Q3 2021 | $46,000 | -67.8% | 2,548 | -74.7% | 0.00% | – |
| Q2 2021 | $143,000 | -77.0% | 10,063 | -76.2% | 0.00% | -100.0% |
| Q1 2021 | $621,000 | +150.4% | 42,213 | +230.5% | 0.00% | 0.0% |
| Q4 2020 | $248,000 | – | 12,771 | – | 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% |