Figures computed from official regulatory filings — .
Analysttarget 5 USD (+310%) · consensus 4/5 · 1 buy · 1 hold · 0 sell
Ownershipinsiders 22.66% · institutions 18.37% · short 1.6% of float
In USD · as of Oct 19, 2026
Ask the machine
Search and compare insider transactions, companies and their statistics in plain language. Your question becomes a query over available data, not a conversation or investment advice.
Data for Spero Therapeutics, Inc. only. No web search. Global per-insider statistics are excluded.
An executed search uses one credit, even with no results. Errors and unsupported questions use no credits.
Spero Therapeutics, Inc., a clinical-stage biopharmaceutical company, focuses on identifying and developing novel treatments for multi-drug resistant (MDR) bacterial infections and rare diseases in the United States. The company's product candidates include Tebipenem HBr (tebipenem pivoxil hydrobromide), an oral carbapenem-class antibiotic to treat complicated urinary tract infections, including pyelonephritis for adult patients, which has completed second Phase 3 trial. It has license agreement with Meiji Seika Pharma Co., Ltd. to develop, manufacture, and commercialize tebipenem pivoxil and tebipenem HBr; and Everest Medicines to develop, manufacture, and commercialize SPR206 in Greater China, South Korea, and Southeast Asian countries. Spero Therapeutics, Inc. was incorporated in 2013 and is headquartered in Cambridge, Massachusetts.
Market information source · Oct 19, 2026
Periods recorded in the consulted sources. These do not certify the legal dates of name changes.
SEC company identity · Oct 19, 2026
Open-market timeline · full history
34 buys81 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| Zack Debra | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Zack Debra | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| VINK PATRICK V.J.J. | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Jackson Scott Thomas | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Tregoning Kathleen | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| VINK PATRICK V.J.J. | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Pottage John C Jr | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Smith Cynthia | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Deshpande Milind | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Smith Cynthia | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| THOMAS FRANK Etrack record | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Tregoning Kathleen | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Jackson Scott Thomas | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Deshpande Milind | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| THOMAS FRANK Etrack record | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Pottage John C Jr | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Rajavelu Esther | Sell | $63.4K | SEC |
| Rajavelu Esther | Sell | $87.6K | SEC |
| Keutzer Timothy | Sell | $44K | SEC |
| Rajavelu Esther | Sell | $119.9K | Unusual size | SEC |
| Keutzer Timothy | Sell | $41.6K | Unusual size | SEC |
| Keutzer Timothy | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Keutzer Timothy | Sell | $51.8K | Unusual size | SEC |
| Keutzer Timothy | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Keutzer Timothy | Sell | $7.8K | SEC |