---
title: "Spero Therapeutics, Inc. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/3e182f58-b9a6-5ea2-96df-347de93659e3
json: https://whiteintel.dev/api/public/dossier/3e182f58-b9a6-5ea2-96df-347de93659e3
identifier: sec:0001701108
jurisdiction: US
risk: Medium
source: WhiteIntel corporate-ownership graph
---

# Spero Therapeutics, Inc.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001701108`  
**Risk level:** Medium  
**Canonical dossier:** https://whiteintel.dev/entity/3e182f58-b9a6-5ea2-96df-347de93659e3  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/3e182f58-b9a6-5ea2-96df-347de93659e3  

## Ownership & control

### Owners / controllers

- **GLAXOSMITHKLINE PLC** (tenpercentowner) — https://whiteintel.dev/entity/c50c635a-a057-547c-90cd-d21ec818140c
- **AQUILO CAPITAL MANAGEMENT, LLC** (tenpercentowner) — https://whiteintel.dev/entity/52da745a-473a-5eaf-9788-95cd76510a0c
- **AQUILO CAPITAL, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/7ee794d4-eba9-5763-998f-675484bcd1ce
- **Alphabet Inc.** (tenpercentowner) — https://whiteintel.dev/entity/20c5d4c8-cf40-576a-abdb-06b88717f649
- **ATLAS VENTURE ASSOCIATES IX, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/166b796c-ba58-59f2-a26c-d470a6f42b3e
- **GV 2015 GP, L.L.C.** (tenpercentowner) — https://whiteintel.dev/entity/f3113d57-f6e0-5f5c-b810-da1fc99997ce
- **ATLAS VENTURE FUND IX, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/1c8eb303-79cf-5adf-a46c-65c7c1124678
- **ATLAS VENTURE ASSOCIATES IX, LLC** (tenpercentowner) — https://whiteintel.dev/entity/9d2932cd-838b-58d1-9eb0-03aba792c8ec
- **LUNDBECKFOND INVEST A/S** (tenpercentowner) — https://whiteintel.dev/entity/2ffa2086-4528-5930-9f05-1cd5291b171c
- **GV 2015, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/dd14beca-3f3f-5a45-9ae9-5712b7c7e540

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

A **125-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.

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **Spero Therapeutics, Inc.** — https://whiteintel.dev/entity/3e182f58-b9a6-5ea2-96df-347de93659e3 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Spero Therapeutics, Inc.**. Human view: https://whiteintel.dev/entity/3e182f58-b9a6-5ea2-96df-347de93659e3 · Structured JSON: https://whiteintel.dev/api/public/dossier/3e182f58-b9a6-5ea2-96df-347de93659e3._

_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"._