Figures computed from official regulatory filings — .
Analysttarget 20 USD (+122%) · consensus 5/5 · 1 buy · 0 hold · 0 sell
Ownershipinsiders 25.98% · institutions 50.16% · short 7.0% of float
In USD · as of Oct 5, 2026
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Xilio Therapeutics, Inc., a clinical-stage biotechnology company, engages in the discovery and development of masked immuno-oncology therapies. The company's pipeline includes XTX501, a bispecific PD-1 / masked IL-2, for patients with metastatic non-small cell lung cancer; Efarindodekin alfa, an investigational, masked IL-12, that is in Phase 2 clinical trial for patients with advanced solid tumors; and Vilastobart, an investigational tumor-activated, Fc-enhanced, high affinity binding anti-CTLA-4 monoclonal antibody. The company was founded in 2016 and is headquartered in Waltham, Massachusetts.
Market information source · Oct 5, 2026
SEC company identity · Oct 5, 2026
Open-market timeline · full history
18 buys9 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| Houvras Yariv | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| XU YUAN | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| ROSS ROBERT W. | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Curran Daniel J. | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Brennan Aoife | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Bello Akintunde Olatokumbo | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Shannon James Samuel | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Bonstein Sara | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Blanchard Cheryl R | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Shannon James Samuel | Buy | $43.9K | conv 73 | SEC |
| GILEAD SCIENCES INCtrack record | BuyD (derivative) | $2M | SEC |
| Russo Rene | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Frankenfield Christopher James | Exercise | n/a (No price was disclosed in the filing) | SEC |
| Frankenfield Christopher James | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Brennan Kevin M. | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Russo Rene | Exercise | n/a (No price was disclosed in the filing) | SEC |
| Luptakova Katarina | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Brennan Kevin M. | Exercise | n/a (No price was disclosed in the filing) | SEC |
| Luptakova Katarina | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Brennan Kevin M. | Sell | $1.2K | SEC |
| Luptakova Katarina | Exercise | n/a (No price was disclosed in the filing) | SEC |
| Russo Rene | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Brennan Kevin M. | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Frankenfield Christopher James | Sell | $4.5K | SEC |
| Frankenfield Christopher James | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |