SPERO THERAPEUTICS INC's ticker is SPRO and the CUSIP is 84833T103. A total of 89 filers reported holding SPERO THERAPEUTICS INC in Q3 2021. The put-call ratio across all filers is 0.88 and the average weighting 0.3%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2022 | $87,000 | -45.6% | 10,000 | 0.0% | 0.02% | -45.0% |
| Q4 2021 | $160,000 | -13.0% | 10,000 | 0.0% | 0.04% | -63.3% |
| Q3 2021 | $184,000 | +31.4% | 10,000 | 0.0% | 0.11% | +131.9% |
| Q2 2021 | $140,000 | -4.8% | 10,000 | 0.0% | 0.05% | 0.0% |
| Q1 2021 | $147,000 | -24.2% | 10,000 | 0.0% | 0.05% | -14.5% |
| Q4 2020 | $194,000 | +73.2% | 10,000 | 0.0% | 0.06% | +44.7% |
| Q3 2020 | $112,000 | -15.8% | 10,000 | 0.0% | 0.04% | -20.8% |
| Q2 2020 | $133,000 | – | 10,000 | – | 0.05% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Aquilo Capital Management, LLC | 3,932,209 | $76,246,000 | 15.85% |
| Atlas Venture Associates XI, LLC | 1,376,968 | $26,700,000 | 4.23% |
| Atlas Venture Associates IX, LLC | 1,376,968 | $26,700,000 | 4.23% |
| BVF INC/IL | 2,243,278 | $43,497,000 | 1.71% |
| AWM Investment Company, Inc. | 372,755 | $7,228,000 | 0.92% |
| Alphabet Inc. | 889,979 | $17,257,000 | 0.83% |
| Rock Springs Capital Management LP | 1,235,000 | $23,947,000 | 0.51% |
| Novo Holdings A/S | 576,702 | $11,182,000 | 0.48% |
| Artal Group S.A. | 500,000 | $9,695,000 | 0.21% |
| Granahan Investment Management | 420,320 | $8,150,000 | 0.18% |