--- title: "Xilio Therapeutics, Inc. — Ownership Dossier" canonical: https://whiteintel.dev/entity/985ac0f2-bc6f-5a09-a727-79dcd06514ef json: https://whiteintel.dev/api/public/dossier/985ac0f2-bc6f-5a09-a727-79dcd06514ef identifier: sec:0001840233 jurisdiction: US risk: Medium source: WhiteIntel corporate-ownership graph --- # Xilio Therapeutics, Inc. **Type:** Company **Jurisdiction:** US **Identifier:** `sec:0001840233` **Risk level:** Medium **Canonical dossier:** https://whiteintel.dev/entity/985ac0f2-bc6f-5a09-a727-79dcd06514ef **Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/985ac0f2-bc6f-5a09-a727-79dcd06514ef ## Ownership & control ### Owners / controllers - **Frankenfield Christopher James** (officer) — https://whiteintel.dev/entity/5f346c4f-b50b-56b8-8877-3ce934c3776d - **Luptakova Katarina** (officer) — https://whiteintel.dev/entity/e278d6b8-4ed3-5f29-bd5d-380a2cb7f56a - **Russo Rene** (officer) — https://whiteintel.dev/entity/9760fc3c-be46-5c45-a617-68be36d30412 - **Brennan Kevin M.** (officer) — https://whiteintel.dev/entity/d3187c0c-7d1a-5a0d-851a-af225fd53cc7 - **Blanchard Cheryl R** (director) — https://whiteintel.dev/entity/e925182e-f6c2-53ad-bf94-37dbb6ab7ff4 - **ROSS ROBERT W.** (director) — https://whiteintel.dev/entity/c9f674fa-c1b3-53f0-82df-193f5556c2c6 - **Bonstein Sara** (director) — https://whiteintel.dev/entity/863834af-fa17-589e-be68-abe66d736ff8 - **SHANNON JAMES SAMUEL** (director) — https://whiteintel.dev/entity/aa70affd-2ab0-5041-9b0e-b54ca419f290 - **XU YUAN** (director) — https://whiteintel.dev/entity/80919ab7-4638-5491-ac19-35b74c83cf9e - **BELLO AKINTUNDE OLATOKUMBO** (director) — https://whiteintel.dev/entity/7724ad77-0694-5d7d-b180-01b940f7e7bf - **Brennan Aoife** (director) — https://whiteintel.dev/entity/5f2e8c7f-d9f4-5cbd-977c-27ad18e8dad4 - **CURRAN DANIEL J.** (director) — https://whiteintel.dev/entity/3b48e843-582d-59e0-8632-21485d2d8ba7 - **Russo Rene** (director) — https://whiteintel.dev/entity/9760fc3c-be46-5c45-a617-68be36d30412 - **Brennan Kevin M.** (officer) — https://whiteintel.dev/entity/d3187c0c-7d1a-5a0d-851a-af225fd53cc7 - **Russo Rene** (officer) — https://whiteintel.dev/entity/9760fc3c-be46-5c45-a617-68be36d30412 - **Luptakova Katarina** (officer) — https://whiteintel.dev/entity/e278d6b8-4ed3-5f29-bd5d-380a2cb7f56a - **Frankenfield Christopher James** (officer) — https://whiteintel.dev/entity/5f346c4f-b50b-56b8-8877-3ce934c3776d - **GILEAD SCIENCES, INC.** (tenpercentowner) — https://whiteintel.dev/entity/601e55e5-ff7d-5603-a86e-1f1ee799a384 - **Rossi Christina** (director) — https://whiteintel.dev/entity/f0d42886-b1f9-587f-861d-c37ddb2d3911 - **Clancy Paul J** (director) — https://whiteintel.dev/entity/63dedcef-cd0a-5416-98ec-995c857fc79e - **GKCC, LLC** (tenpercentowner) — https://whiteintel.dev/entity/079a1e49-ad8a-5643-9f8c-7b633c2c48a5 - **Chudnovsky Yekaterina** (tenpercentowner) — https://whiteintel.dev/entity/bed0cb2c-4e42-53d9-b602-8f4371a0c22f - **Atlas Venture Fund XI, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/0d160e3e-733f-5ed2-9cf6-d2f6fa110037 - **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/cfc745a7-8e02-5180-b8b7-b050f1fb6e4a - **ATLAS VENTURE OPPORTUNITY FUND I, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/d337efa4-1263-57b9-96f9-8493d75489c9 - **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, LLC** (tenpercentowner) — https://whiteintel.dev/entity/b71c0123-cd14-5fd9-83ed-cb8e36d6e755 - **Atlas Venture Associates XI, LLC** (tenpercentowner) — https://whiteintel.dev/entity/8a09056a-29bd-5202-b79f-30dd1c1582c8 - **Atlas Venture Associates XI, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/4565f9d1-8e59-5ad4-886b-4dfc4f63433e - **Huber Martin H. Jr.** (officer) — https://whiteintel.dev/entity/e1ae7062-108c-5c6e-9774-1e70d366e15f - **HEYMAN TOMAS J.** (director) — https://whiteintel.dev/entity/52792c48-030a-5a4e-ade1-48fff350fe76 - **ENGLISH EDWARD C** (officer) — https://whiteintel.dev/entity/2d677ec9-ba95-51af-94f6-35ea31ed093a - **ROSS MICHAEL JAY** (director) — https://whiteintel.dev/entity/2c0bde76-eecf-5c6a-9f9c-543700313fe6 - **GIOVINE SALVATORE** (officer) — https://whiteintel.dev/entity/0bf4e4dd-9fd9-5d34-bf91-86f530804907 - **Bain Capital Life Sciences Investors II, LLC** (tenpercentowner) — https://whiteintel.dev/entity/189bf0ff-c9bb-5b66-8684-74b8410de46b - **FIDELITY INTERNATIONAL LTD** (tenpercentownerother) — https://whiteintel.dev/entity/35833c8d-b558-5377-9b10-e3e53992bd22 - **TOMLINSON SIMON M** (tenpercentowner) — https://whiteintel.dev/entity/efebcd65-96ef-5425-8808-2532f20229b9 - **BAY CITY CAPITAL FUND LLC** (tenpercentowner) — https://whiteintel.dev/entity/7b09af4e-19f4-524e-a475-a1e127780ae2 - **FIDELITY INTERNATIONAL LTD** (other) — https://whiteintel.dev/entity/35833c8d-b558-5377-9b10-e3e53992bd22 - **Bain Capital Life Sciences Fund II, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/162643c2-cbde-5f4f-b903-6f9c543ca98f - **LYNCH DANIEL** (director) — https://whiteintel.dev/entity/4910f4e0-63fe-5480-88e0-7ec6d99cf7c4 - **TAKEDA VENTURES, INC.** (tenpercentowner) — https://whiteintel.dev/entity/29b56b73-8866-55c4-8114-379b8d16bdd7 - **DEERFIELD CAPITAL LP** (tenpercentownerother) — https://whiteintel.dev/entity/5f3c11a7-c53a-58c1-ba4f-1ad86e04c791 - **LYNCH DANIEL** (tenpercentowner) — https://whiteintel.dev/entity/4910f4e0-63fe-5480-88e0-7ec6d99cf7c4 - **Deerfield Mgmt V, L.P.** (tenpercentownerother) — https://whiteintel.dev/entity/dbcfd09c-54c5-59cd-8b62-f1a6f3e21275 - **DEERFIELD PARTNERS, L.P.** (tenpercentownerother) — https://whiteintel.dev/entity/65f05e41-ef95-517f-9b59-b6fc681aa121 - **FMR LLC** (other) — https://whiteintel.dev/entity/10228b52-3a70-5081-82f1-70e198e26fa2 - **BCIP Life Sciences Associates, LP** (tenpercentowner) — https://whiteintel.dev/entity/c9af82a5-7ee7-5069-a85b-82d5ac292b27 - **WILLIAMS JOHN CHARLES** (tenpercentowner) — https://whiteintel.dev/entity/41675174-f2c7-59f7-8546-a928783239ab - **SV7 (IMF) GP LLP** (tenpercentowner) — https://whiteintel.dev/entity/e6fb8456-01fd-5866-9147-3eab89cd2a0f - **ALEXANDRIA VENTURE INVESTMENTS, LLC** (tenpercentowner) — https://whiteintel.dev/entity/fd420150-f2e0-53b8-a694-7930b94d958c - **BCLS II Investco (GP), LLC** (tenpercentowner) — https://whiteintel.dev/entity/45b680e0-6dba-595c-bfba-c2205ce683d0 - **Russo Rene** (tenpercentowner) — https://whiteintel.dev/entity/9760fc3c-be46-5c45-a617-68be36d30412 - **BCLS II Investco, LP** (tenpercentowner) — https://whiteintel.dev/entity/2aa64dd0-a45d-57a4-8779-12d51ded5ea0 - **CLACKSON TIMOTHY P** (tenpercentowner) — https://whiteintel.dev/entity/1f415b57-b4f6-59ac-962f-06eb62891cc5 - **ESTATE OF ULRICH RODECK** (tenpercentowner) — https://whiteintel.dev/entity/ab86fdc8-3c05-5abb-9dd5-144bd86d9082 - **HUMPHREY RACHEL** (director) — https://whiteintel.dev/entity/f2c4d6c6-ee8d-5153-8b05-b9c4533f8871 - **TAKEDA PHARMACEUTICAL CO LTD** (tenpercentowner) — https://whiteintel.dev/entity/4bf315f3-ff14-5761-9d53-c9dd75c5da78 - **FMR LLC** (tenpercentownerother) — https://whiteintel.dev/entity/10228b52-3a70-5081-82f1-70e198e26fa2 - **ROCK SPRINGS CAPITAL LLC** (tenpercentowner) — https://whiteintel.dev/entity/9ca53525-408c-5bdd-b4da-81d0db0787ec - **Bain Capital Life Sciences Investors, LLC** (tenpercentowner) — https://whiteintel.dev/entity/2f2f1ab2-6c81-5add-ae47-55afbafde9a1 - **MERCK KGAA** (tenpercentowner) — https://whiteintel.dev/entity/18badbc4-b97d-5bda-b7d8-5bb342abf489 - **RIVERVEST VENTURE FUND IV, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/3ff064f3-0206-5b84-921c-bb00e4c7a6b1 - **Flynn James E** (tenpercentownerother) — https://whiteintel.dev/entity/e41579a6-248b-5454-a089-66f9a7c69ae7 - **DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)** (tenpercentownerother) — https://whiteintel.dev/entity/31a5caa4-05d6-5739-b04b-16a6222da289 - **FOUR PINES MASTER FUND LP** (tenpercentowner) — https://whiteintel.dev/entity/89ef0301-2e62-5022-9165-8d857a1416a3 - **ROCK SPRINGS CAPITAL MASTER FUND LP** (tenpercentowner) — https://whiteintel.dev/entity/2f68d5c8-2b1f-512d-a3e2-6f1547b726b7 - **SV7 IMPACT MEDICINE FUND LP** (tenpercentowner) — https://whiteintel.dev/entity/c7bf105a-d8cc-5c41-8cec-df83c5fdd348 - **ROCK SPRINGS CAPITAL MANAGEMENT LP** (tenpercentowner) — https://whiteintel.dev/entity/763acb2a-48c2-5645-83b3-00bfc31dfdf8 ### UBO chain (walk to the ultimate owner) A **172-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing. --- _This is the markdown-for-agents view of the WhiteIntel dossier for **Xilio Therapeutics, Inc.**. Human view: https://whiteintel.dev/entity/985ac0f2-bc6f-5a09-a727-79dcd06514ef · Structured JSON: https://whiteintel.dev/api/public/dossier/985ac0f2-bc6f-5a09-a727-79dcd06514ef._ _Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._