---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-088079"
form_type: "8-K"
ticker: "S"
cik: "0001583708"
company_name: "SentinelOne, Inc."
filed_at: "2025-09-08T23:59:59+00:00"
generated_at: "2026-05-17T07:36:08.904366+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# SentinelOne acquires Prompt Security for $180M and Observo for $225M in cash and stock

## Summary
- Prompt Security deal closed Sep 5, 2025; consideration of ~$180M (cash + 1,555,099 shares of Class A common stock).
- Observo deal signed Sep 8, 2025; consideration ~$225M (cash + ~5.3M shares, 2.45M of which subject to vesting).
- Both stock issuances made to accredited investors under exemptions from registration.
- Observo expected to close in SentinelOne's Q3 fiscal 2026, pending regulatory approvals and conditions.

## SEC filing metadata
- accession: 0001104659-25-088079
- form_type: 8-K
- ticker: S
- cik: 0001583708
- company_name: SentinelOne, Inc.
- filed_at: 2025-09-08T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 3.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1583708/000110465925088079/0001104659-25-088079-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1583708/000110465925088079/tm2525181d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-088079
- JSON: https://secwatch.observer/filing/0001104659-25-088079.json
- Plain text: https://secwatch.observer/filing/0001104659-25-088079.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.