SPERO THERAPEUTICS INC's ticker is SPRO and the CUSIP is 84833T103. A total of 96 filers reported holding SPERO THERAPEUTICS INC in Q1 2021. The put-call ratio across all filers is 1.92 and the average weighting 0.2%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2022 | $0 | -100.0% | 204 | -94.8% | 0.00% | – |
| Q1 2022 | $35,000 | -96.3% | 3,930 | -93.3% | 0.00% | – |
| Q4 2021 | $940,000 | +413.7% | 58,742 | +489.5% | 0.00% | – |
| Q3 2021 | $183,000 | +137.7% | 9,965 | +79.1% | 0.00% | – |
| Q2 2021 | $77,000 | -75.9% | 5,564 | -74.3% | 0.00% | – |
| Q1 2021 | $319,000 | +145.4% | 21,640 | +223.0% | 0.00% | – |
| Q4 2020 | $130,000 | +35.4% | 6,700 | -21.7% | 0.00% | – |
| Q3 2020 | $96,000 | -26.2% | 8,558 | -11.9% | 0.00% | – |
| Q2 2020 | $130,000 | +282.4% | 9,709 | +124.7% | 0.00% | – |
| Q1 2020 | $34,000 | -68.8% | 4,320 | -62.0% | 0.00% | – |
| Q4 2019 | $109,000 | +87.9% | 11,361 | +106.3% | 0.00% | – |
| Q3 2019 | $58,000 | -25.6% | 5,508 | -18.9% | 0.00% | – |
| Q2 2019 | $78,000 | +136.4% | 6,789 | +164.5% | 0.00% | – |
| Q1 2019 | $33,000 | +1550.0% | 2,567 | +488.8% | 0.00% | – |
| Q4 2018 | $2,000 | -94.6% | 436 | -87.7% | 0.00% | – |
| Q3 2018 | $37,000 | +428.6% | 3,557 | +628.9% | 0.00% | – |
| Q2 2018 | $7,000 | -63.2% | 488 | -62.2% | 0.00% | – |
| Q1 2018 | $19,000 | +72.7% | 1,291 | +35.0% | 0.00% | – |
| Q4 2017 | $11,000 | – | 956 | – | 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% |