BlackRock, Inc. 13D and 13G filings for Spero Therapeutics, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime |
Transaction Date |
Type | Company Symbol |
Filed By Symbol |
Shares Owned % Owned |
Shares Vs. Prev Report | View |
| 2022-07-08 4:57 pm Sale |
2022-06-30 | 13G | Spero Therapeutics, Inc. SPRO |
BLACKROCK INC BLK |
690,753 2.100% |
-1,108,024 (-61.60%) |
Filing |
| 2022-02-03 4:29 pm Purchase |
2021-12-31 | 13G | Spero Therapeutics, Inc. SPRO |
BLACKROCK INC BLK |
1,798,777 5.600% |
67,177 (+3.88%) |
Filing |
| 2021-02-02 3:13 pm Purchase |
2020-12-31 | 13G | Spero Therapeutics, Inc. SPRO |
BLACKROCK INC BLK |
1,731,600 6.400% |
1,731,600 (New Position) |
Filing |