Spero Therapeutics, Inc. Common Stock (SPRO) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for SPRO. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 59 institutions reported holding SPRO, with 21.5 million shares worth $47.5 million in aggregate.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|---|---|---|
| Gsk | 9,190,606 | $20M | UNCHANGED |
| Pfizer | 2,362,348 | $5M | UNCHANGED |
| Vanguard | 2,349,320 | $5M | INCREASED |
| Renaissance Technologies | 947,904 | $2M | DECREASED |
| Alphabet | 889,979 | $2M | UNCHANGED |
Full institutional holdings, insider history, and congressional trades for Spero Therapeutics, Inc. Common Stock on SentiSense.