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 2021 | $18,000 | +28.6% | 1,000 | 0.0% | 0.00% | – |
| Q2 2021 | $14,000 | -100.0% | 1,000 | -77.3% | 0.00% | -100.0% |
| Q1 2021 | $64,768,000 | +174948.6% | 4,400 | +131.6% | 0.00% | 0.0% |
| Q4 2020 | $37,000 | -2.6% | 1,900 | -44.1% | 0.00% | 0.0% |
| Q3 2020 | $38,000 | -54.8% | 3,400 | -45.2% | 0.00% | -50.0% |
| Q2 2020 | $84,000 | – | 6,200 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Aquilo Capital Management, LLC | 3,829,209 | $53,456,000 | 13.89% |
| Atlas Venture Associates IX, LLC | 1,376,968 | $19,223,000 | 3.38% |
| BVF INC/IL | 2,137,978 | $29,846,000 | 1.12% |
| AWM Investment Company, Inc. | 372,755 | $5,204,000 | 0.51% |
| Novo Holdings A/S | 468,902 | $6,546,000 | 0.29% |
| Rock Springs Capital Management LP | 965,928 | $13,484,000 | 0.27% |
| Alphabet Inc. | 889,979 | $12,424,000 | 0.25% |
| Artal Group S.A. | 500,000 | $6,980,000 | 0.14% |
| Granahan Investment Management | 332,639 | $4,644,000 | 0.09% |
| Radnor Capital Management, LLC | 10,000 | $140,000 | 0.05% |