Stocktoria
Spero Therapeutics, Inc. SPRO
Spero Therapeutics, Inc. institutional holders
| Investor | Shares | Value | % of company |
|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | 947,904 | $2.1M | 1.61% |
| TWO SIGMA INVESTMENTS, LP | 382,814 | $846,019 | 0.65% |
| BlackRock Finance, Inc. | 483,402 | $628,423 | 0.82% |
| Point72 Asset Management, L.P. | 104,377 | $230,673 | 0.18% |
| CITADEL ADVISORS LLC | 65,600 | $144,976 | 0.11% |
| MILLENNIUM MANAGEMENT LLC | 19,298 | $42,649 | 0.03% |
% of company = reported institutional shares ÷ shares outstanding. Based on the latest reports; not every holder reports every quarter.
Computed from company filings · US · as of 2025-12-31. Facts plus Stocktoria's own computed scores — not investment advice.