SPERO THERAPEUTICS INC's ticker is SPRO and the CUSIP is 84833T103. A total of 92 filers reported holding SPERO THERAPEUTICS INC in Q4 2020. The put-call ratio across all filers is 1.32 and the average weighting 0.3%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2020 | $113,000 | -17.5% | 10,090 | 0.0% | 0.01% | -42.1% |
| Q2 2020 | $137,000 | -16.0% | 10,090 | -50.0% | 0.02% | -17.4% |
| Q1 2020 | $163,000 | -3.0% | 20,175 | +15.2% | 0.02% | +15.0% |
| Q4 2019 | $168,000 | -14.3% | 17,515 | -5.4% | 0.02% | -25.9% |
| Q3 2019 | $196,000 | -8.8% | 18,515 | -1.1% | 0.03% | -12.9% |
| Q2 2019 | $215,000 | -10.4% | 18,715 | 0.0% | 0.03% | -22.5% |
| Q1 2019 | $240,000 | +108.7% | 18,715 | 0.0% | 0.04% | +81.8% |
| Q4 2018 | $115,000 | – | 18,715 | – | 0.02% | – |
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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% |