---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-112402"
form_type: "8-K"
ticker: "RIG"
cik: "0001451505"
company_name: "Transocean Ltd."
filed_at: "2026-09-30T21:11:28+00:00"
generated_at: "2026-10-12T14:10:12.995728+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Transocean: DOJ closes HSR review of Valaris deal; closing expected in Q4 2026

## Summary
- On September 30, 2026, Transocean and Valaris were notified the DOJ Antitrust Division closed its HSR Act investigation and the waiting period expired.
- Transocean and Valaris expect the Business Combination to close in Q4 2026, subject to remaining closing conditions in the February 9, 2026 agreement.
- Under the February 9, 2026 Business Combination Agreement, Transocean will acquire all Valaris common shares for 15.235 Transocean shares per Valaris share.
- Transocean and Valaris filed a joint preliminary proxy statement on Schedule 14A with the SEC on May 19, 2026, seeking shareholder approvals.

## SEC filing metadata
- accession: 0001104659-26-112402
- form_type: 8-K
- ticker: RIG
- cik: 0001451505
- company_name: Transocean Ltd.
- filed_at: 2026-09-30T21:11:28+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1451505/000110465926112402/0001104659-26-112402-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1451505/000110465926112402/tm2626691d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-112402
- JSON: https://secwatch.observer/filing/0001104659-26-112402.json
- Plain text: https://secwatch.observer/filing/0001104659-26-112402.txt

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