Perestroika - 24 Nov 2025 Form 4 Insider Report for Transocean Ltd. (RIG)

Reporting relationship: Director
Issuer ticker: RIG
Reported as of: 24 Nov 2025
Net transaction value: +$6,030,000
SEC form: 4
Accepted by SEC: 25 Nov 2025, 17:31:08 UTC
Prior SEC filing: 30 Sep 2025
Source filing: View source filing
Reporting owner signature: /s/ Daniel Ro-Trock by Power of Attorney

Key filing fact

Perestroika filed Form 4 for Transocean Ltd. (RIG) on 25 Nov 2025.

Key facts

This page summarizes Perestroika's Form 4 filing for Transocean Ltd. (RIG).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 25 Nov 2025, 17:31.

Change

Previous filing in this sequence was filed on 30 Sep 2025.
Current net transaction value: +$6,030,000.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001729635 Primary reporting owner

Perestroika

Relationship: Director
Address: TURMSTRASSE 30, STEINHAUSEN, SWITZERLAND
Signature: /s/ Daniel Ro-Trock by Power of Attorney
Signature date: 25 Nov 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RIG transaction

Registered Shares

Purchase

Transaction value: $6,030,000
Shares: +1,500,000
Change %: +1.6%
Price: $4.02
Shares after: 96,574,894
Date: 24 Nov 2025
Ownership: By Perestroika (Cyprus) Ltd.
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

These securities are held directly by Perestroika (Cyprus) Ltd., which is a wholly owned subsidiary of Perestroika AS. Mr. Frederik Mohn is the sole director and owner of Perestroika AS and is the indirect beneficial owner of all securities owned by Perestroika AS.

SEC remarks

Perestroika (Cyprus) Ltd. is a wholly owned subsidiary of Perestroika AS. Due to Perestroika AS's designation of a member of the board of directors of the Company, Perestroika (Cyprus) Ltd. may be deemed to be a director of the Company by deputization. Perestroika AS's right to designate a member of the Company's board of directors has since terminated.