Robert Thaddeus Vayda - 01 Mar 2026 Form 4 Insider Report for Transocean Ltd. (RIG)

Role: EVP, Chief Financial Officer
Signature: /s/ Debra Kupferman by Power of Attorney
Issuer symbol: RIG
Transactions as of: 01 Mar 2026
Net transactions value: +$593,824
Form type: 4
Filing time: 03 Mar 2026, 21:35:57 UTC
Previous filing: 09 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Vayda Robert Thaddeus	EVP, Chief Financial Officer	1414 ENCLAVE PARKWAY, HOUSTON	/s/ Debra Kupferman by Power of Attorney	03 Mar 2026	0002022236

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RIG	Registered Shares	Options Exercise	$112,444	+17,991	+6.9%	$6.25	276,924	01 Mar 2026	Direct	F1
transaction	RIG	Registered Shares	Options Exercise	$142,731	+22,837	+8.2%	$6.25	299,761	01 Mar 2026	Direct	F2
transaction	RIG	Registered Shares	Options Exercise	$136,750	+21,880	+7.3%	$6.25	321,641	01 Mar 2026	Direct	F3
transaction	RIG	Registered Shares	Options Exercise	$587,275	+93,964	+29%	$6.25	415,605	01 Mar 2026	Direct	F4
transaction	RIG	Registered Shares	Tax liability	$385,376	-62,970	-15%	$6.12	352,635	03 Mar 2026	Direct	F5
holding	RIG	Registered Shares						91	01 Mar 2026	By Child	F6

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

Explanation of Responses:

Id	Content
F1	Restricted Units, which are 1-for-1 share equivalents, acquired on February 9, 2023, pursuant to the Issuer's long-term incentive plan. One third of such restricted units vested on March 1, 2026, resulting in the right of the reporting person to receive the registered shares.
F2	Restricted Units, which are 1-for-1 share equivalents, acquired on February 8, 2024, pursuant to the Issuer's long-term incentive plan. One third of such restricted units vested on March 1, 2026, resulting in the right of the reporting person to receive the registered shares. The remaining restricted share units vest as follows: 22,837 on March 1, 2027.
F3	Restricted Units, which are 1-for-1 share equivalents, acquired on May 16, 2024, pursuant to the Issuer's long-term incentive plan. One third of such restricted units vested on March 1, 2026, resulting in the right of the reporting person to receive the registered shares. The remaining restricted share units vest as follows: 21,880 on March 1, 2027.
F4	Restricted Units, which are 1-for-1 share equivalents, acquired on February 13, 2025, pursuant to the Issuer's long-term incentive plan. One third of such restricted units vested on March 1, 2026, resulting in the right of the reporting person to receive the registered shares. The remaining restricted share units vest as follows: 93,965 on March 1, 2027 and 93,965 on March 1, 2028.
F5	Shares sold upon vesting to satisfy tax withholding obligations.
F6	The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.