SPERO THERAPEUTICS INC's ticker is SPRO and the CUSIP is 84833T103. A total of 53 filers reported holding SPERO THERAPEUTICS INC in Q3 2023. The put-call ratio across all filers is - and the average weighting 0.3%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2023 | $6 | -99.8% | 4 | -99.9% | 0.00% | – |
| Q2 2022 | $3,000 | +200.0% | 4,120 | +3900.0% | 0.00% | – |
| Q1 2022 | $1,000 | -99.2% | 103 | -98.8% | 0.00% | – |
| Q1 2021 | $126,000 | -24.1% | 8,552 | 0.0% | 0.00% | – |
| Q4 2020 | $166,000 | +38.3% | 8,552 | -20.5% | 0.00% | – |
| Q3 2020 | $120,000 | -78.7% | 10,752 | -74.2% | 0.00% | – |
| Q2 2020 | $564,000 | -29.5% | 41,652 | -57.9% | 0.00% | – |
| Q1 2020 | $800,000 | -15.9% | 98,952 | 0.0% | 0.00% | – |
| Q4 2019 | $951,000 | -47.4% | 98,952 | -42.0% | 0.00% | – |
| Q3 2019 | $1,808,000 | -31.4% | 170,588 | -25.5% | 0.00% | – |
| Q2 2019 | $2,635,000 | -47.2% | 228,952 | -41.2% | 0.00% | -100.0% |
| Q1 2019 | $4,986,000 | +65.9% | 389,252 | -20.3% | 0.00% | – |
| Q4 2018 | $3,005,000 | -53.7% | 488,552 | -21.0% | 0.00% | -100.0% |
| Q3 2018 | $6,497,000 | -44.6% | 618,206 | -22.7% | 0.00% | 0.0% |
| Q2 2018 | $11,736,000 | +2.9% | 800,000 | 0.0% | 0.00% | 0.0% |
| Q1 2018 | $11,400,000 | +21.3% | 800,000 | 0.0% | 0.00% | 0.0% |
| Q4 2017 | $9,400,000 | – | 800,000 | – | 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% |