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 | ||||
|---|---|---|---|---|---|---|
| Q4 2021 | $9,000 | -10.0% | 590 | 0.0% | 0.00% | – |
| Q3 2021 | $10,000 | +11.1% | 590 | 0.0% | 0.00% | – |
| Q2 2021 | $9,000 | -84.2% | 590 | -86.0% | 0.00% | -100.0% |
| Q1 2021 | $57,000 | -6.6% | 4,201 | 0.0% | 0.00% | 0.0% |
| Q4 2020 | $61,000 | +79.4% | 4,201 | +16.3% | 0.00% | 0.0% |
| Q3 2020 | $34,000 | -27.7% | 3,611 | 0.0% | 0.00% | -33.3% |
| Q2 2020 | $47,000 | +67.9% | 3,611 | 0.0% | 0.00% | +50.0% |
| Q1 2020 | $28,000 | – | 3,611 | – | 0.00% | – |
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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% |