---
title: "Mersana Therapeutics, Inc. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/4edf03d1-5dc7-5d54-bee4-8e5ea9d963bc
json: https://whiteintel.dev/api/public/dossier/4edf03d1-5dc7-5d54-bee4-8e5ea9d963bc
identifier: sec:0001442836
jurisdiction: US
risk: Medium
source: WhiteIntel corporate-ownership graph
---

# Mersana Therapeutics, Inc.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001442836`  
**Risk level:** Medium  
**Canonical dossier:** https://whiteintel.dev/entity/4edf03d1-5dc7-5d54-bee4-8e5ea9d963bc  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/4edf03d1-5dc7-5d54-bee4-8e5ea9d963bc  

## Ownership & control

### Owners / controllers

- **NEXTECH CROSSOVER I GP S.A R.L.** (tenpercentowner) — https://whiteintel.dev/entity/2a70b45c-0ce8-5005-b4ec-f13ca11420ac
- **SGOBBO ROCCO** (tenpercentowner) — https://whiteintel.dev/entity/4ff9ce2b-755d-52fa-98cd-de47e484a69b
- **EcoR1 Capital, LLC** (tenpercentowner) — https://whiteintel.dev/entity/5197a8ea-a950-5bff-9f38-fe74782a4027
- **CONSTANTINIDES COSTAS** (tenpercentowner) — https://whiteintel.dev/entity/41cfcd08-4007-50a4-bb4e-5391c8858ecb
- **NEXTECH CROSSOVER I SCSP** (tenpercentowner) — https://whiteintel.dev/entity/fef06836-d36b-5c12-bb50-5e41ad05a7f9
- **CHAROUB IAN** (tenpercentowner) — https://whiteintel.dev/entity/cdecc646-d2e0-50da-9b2e-3ad826bebb39
- **KERINS PATRICK J** (tenpercentowner) — https://whiteintel.dev/entity/e5bc5e6b-9ceb-51b7-9e27-6ce1b5425148
- **NEA PARTNERS 14, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/a48ecd61-e848-513f-b82b-39c2b0b0a8db
- **SANDELL SCOTT D** (tenpercentowner) — https://whiteintel.dev/entity/f5d27853-015c-5d89-b453-67c52f1385ee
- **SONSINI PETER W.** (tenpercentowner) — https://whiteintel.dev/entity/497a01a0-d587-5cb5-9ace-d357d91f6f59
- **BASKETT FOREST** (tenpercentowner) — https://whiteintel.dev/entity/82f90b88-c233-5f52-bc76-4342aaeed466
- **NEA 14 GP, LTD** (tenpercentowner) — https://whiteintel.dev/entity/5cabcbb6-02cc-5d11-9dfe-28cda26f1aaf
- **NEW ENTERPRISE ASSOCIATES 14, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/2372b2a4-909a-53bb-8843-73d2e3cce40e
- **Florence Anthony A. Jr.** (tenpercentowner) — https://whiteintel.dev/entity/94e349e2-421c-5582-b88d-da2fd26c7769
- **MOTT DAVID M** (tenpercentowner) — https://whiteintel.dev/entity/1b443508-3cb1-54c7-a742-c952b0695da7
- **BARRIS PETER J** (tenpercentowner) — https://whiteintel.dev/entity/5371e54f-a6f6-5045-9fad-153ba8905693
- **VISWANATHAN RAVI** (tenpercentowner) — https://whiteintel.dev/entity/a25c86ac-4e8c-5fa8-adc0-4857b3374eff
- **BARRETT M JAMES** (tenpercentowner) — https://whiteintel.dev/entity/0efbda00-b21d-5987-b1ef-8271c841042a
- **FMR LLC** (tenpercentownerother) — https://whiteintel.dev/entity/10228b52-3a70-5081-82f1-70e198e26fa2

### UBO chain (walk to the ultimate owner)

A **64-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 **Mersana Therapeutics, Inc.**. Human view: https://whiteintel.dev/entity/4edf03d1-5dc7-5d54-bee4-8e5ea9d963bc · Structured JSON: https://whiteintel.dev/api/public/dossier/4edf03d1-5dc7-5d54-bee4-8e5ea9d963bc._

_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"._