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 | ||||
|---|---|---|---|---|---|---|
| Q3 2022 | $0 | – | 110 | 0.0% | 0.00% | – |
| Q2 2022 | $0 | -100.0% | 110 | 0.0% | 0.00% | – |
| Q1 2022 | $1,000 | -50.0% | 110 | 0.0% | 0.00% | – |
| Q4 2021 | $2,000 | 0.0% | 110 | 0.0% | 0.00% | – |
| Q3 2021 | $2,000 | +100.0% | 110 | +115.7% | 0.00% | – |
| Q2 2021 | $1,000 | 0.0% | 51 | 0.0% | 0.00% | – |
| Q1 2021 | $1,000 | 0.0% | 51 | 0.0% | 0.00% | – |
| Q4 2020 | $1,000 | – | 51 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Atlas Venture Associates IX, LLC | 1,376,968 | $13,247,000 | 23.08% |
| Aquilo Capital Management, LLC | 1,154,356 | $11,099,000 | 4.17% |
| VHCP Management II, LLC | 474,015 | $4,558,000 | 1.20% |
| AWM Investment Company, Inc. | 474,344 | $4,561,000 | 0.89% |
| Alphabet Inc. | 1,112,473 | $10,696,000 | 0.65% |
| BVF INC/IL | 845,405 | $8,129,000 | 0.62% |
| Novo Holdings A/S | 931,099 | $8,948,000 | 0.58% |
| Artal Group S.A. | 500,000 | $4,808,000 | 0.19% |
| Rock Springs Capital Management LP | 525,000 | $5,048,000 | 0.16% |
| Granahan Investment Management | 148,867 | $1,431,000 | 0.07% |