---
title: "BRENNAN KAREN — Ownership Dossier"
canonical: https://whiteintel.dev/entity/8a5bb72b-61e6-587d-8cc6-e6facde32efe
json: https://whiteintel.dev/api/public/dossier/8a5bb72b-61e6-587d-8cc6-e6facde32efe
identifier: sec:0001817590
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# BRENNAN KAREN

**Type:** Company  
**Jurisdiction:** US  
**Identifier:** `sec:0001817590`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/8a5bb72b-61e6-587d-8cc6-e6facde32efe  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/8a5bb72b-61e6-587d-8cc6-e6facde32efe  

## Ownership & control

### Holdings / subsidiaries

- **CHECKMATE PHARMACEUTICALS, INC.** (officer) — https://whiteintel.dev/entity/9664dfd2-a41c-58bb-9e35-006f65068910

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **BRENNAN KAREN**. Human view: https://whiteintel.dev/entity/8a5bb72b-61e6-587d-8cc6-e6facde32efe · Structured JSON: https://whiteintel.dev/api/public/dossier/8a5bb72b-61e6-587d-8cc6-e6facde32efe._

_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"._