---
title: "Summit Partners Growth Equity Fund IX-B, L.P. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/697be210-44df-5ce4-b182-d17f4b2cdac8
json: https://whiteintel.dev/api/public/dossier/697be210-44df-5ce4-b182-d17f4b2cdac8
identifier: sec:0001634426
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Summit Partners Growth Equity Fund IX-B, L.P.

**Type:** Person  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001634426`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/697be210-44df-5ce4-b182-d17f4b2cdac8  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/697be210-44df-5ce4-b182-d17f4b2cdac8  

## Cross-source identity

The same real-world entity, resolved across sources:

- **SUMMIT PARTNERS GROWTH EQUITY FUND IX-B, L.P.** — GLEIF · `lei:549300NO2R139MR8I257` — https://whiteintel.dev/entity/73de1279-7a68-599d-b9f6-afd8502a68f0

## Ownership & control

### Holdings / subsidiaries

- **Klaviyo, Inc.** (10% owner) — https://whiteintel.dev/entity/b1a8cd55-4901-52a2-8fd3-0b8cd5c78f27
- **LifeStance Health Group, Inc.** (other) — https://whiteintel.dev/entity/c0cd6632-e563-5907-bb73-c26485b84705
- **Klaviyo, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/b1a8cd55-4901-52a2-8fd3-0b8cd5c78f27
- **LifeStance Health Group, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/c0cd6632-e563-5907-bb73-c26485b84705

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Summit Partners Growth Equity Fund IX-B, L.P.**. Human view: https://whiteintel.dev/entity/697be210-44df-5ce4-b182-d17f4b2cdac8 · Structured JSON: https://whiteintel.dev/api/public/dossier/697be210-44df-5ce4-b182-d17f4b2cdac8._

_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"._