Perestroika (Cyprus) Ltd - Sep 26, 2025 Form 4 Insider Report for Transocean Ltd. (RIG)

Role: Director, 10%+ Owner
Signature: /s/ Daniel Ro-Trock by Power of Attorney
Stock symbol: RIG
Transactions as of: Sep 26, 2025
Transactions value $: $12,200,000
Form type: 4
Date filed: 9/30/2025, 09:44 PM
Previous filing: Sep 13, 2024
Next filing: Nov 25, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Perestroika (Cyprus) Ltd	Director, 10%+ Owner	C/O PERESTROIKA AS, TURMSTRASSE 30, STEINHAUSEN, SWITZERLAND	/s/ Daniel Ro-Trock by Power of Attorney	2025-09-30	0001737912

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RIG	Registered Shares	Purchase	$12.2M	+4M	+4.39%	$3.05	95.1M	Sep 26, 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The transaction reported herein was made in connection with a registered public offering of securities at the reported public offering price offered by the Issuer, as described in the Issuer's prospectus supplement filed with the U.S. Securities and Exchange Commission on September 26, 2025.

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.