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 | $15,000 | -44.4% | 1,713 | 0.0% | 0.00% | 0.0% |
| Q4 2021 | $27,000 | -15.6% | 1,713 | 0.0% | 0.00% | 0.0% |
| Q3 2021 | $32,000 | +33.3% | 1,713 | 0.0% | 0.00% | 0.0% |
| Q2 2021 | $24,000 | -4.0% | 1,713 | 0.0% | 0.00% | 0.0% |
| Q1 2021 | $25,000 | -24.2% | 1,713 | 0.0% | 0.00% | -50.0% |
| Q4 2020 | $33,000 | +153.8% | 1,713 | +52.3% | 0.00% | +100.0% |
| Q3 2020 | $13,000 | -13.3% | 1,125 | 0.0% | 0.00% | 0.0% |
| Q2 2020 | $15,000 | +275.0% | 1,125 | +125.0% | 0.00% | – |
| Q1 2020 | $4,000 | -20.0% | 500 | 0.0% | 0.00% | – |
| Q4 2019 | $5,000 | 0.0% | 500 | 0.0% | 0.00% | – |
| Q3 2019 | $5,000 | -16.7% | 500 | 0.0% | 0.00% | – |
| Q2 2019 | $6,000 | 0.0% | 500 | 0.0% | 0.00% | – |
| Q1 2019 | $6,000 | +100.0% | 500 | 0.0% | 0.00% | – |
| Q4 2018 | $3,000 | -40.0% | 500 | 0.0% | 0.00% | – |
| Q3 2018 | $5,000 | -28.6% | 500 | 0.0% | 0.00% | – |
| Q2 2018 | $7,000 | 0.0% | 500 | 0.0% | 0.00% | – |
| Q1 2018 | $7,000 | +16.7% | 500 | 0.0% | 0.00% | – |
| Q4 2017 | $6,000 | – | 500 | – | 0.00% | – |
Download | ||||||
Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Atlas Venture Associates IX, LLC | 1,376,968 | $14,596,000 | 24.02% |
| Aquilo Capital Management, LLC | 1,154,356 | $12,236,000 | 8.62% |
| VHCP Management II, LLC | 474,015 | $5,025,000 | 1.92% |
| AWM Investment Company, Inc. | 598,315 | $6,342,000 | 1.35% |
| BVF INC/IL | 939,704 | $9,961,000 | 1.05% |
| Novo Holdings A/S | 465,983 | $4,939,000 | 0.85% |
| Alphabet Inc. | 1,112,473 | $11,792,000 | 0.35% |
| Artal Group S.A. | 540,000 | $5,724,000 | 0.23% |
| Rock Springs Capital Management LP | 525,000 | $5,565,000 | 0.22% |
| DAFNA Capital Management LLC | 39,395 | $418,000 | 0.16% |