SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Perestroika (Last) (First) (Middle) TURMSTRASSE 30 (Street) STEINHAUSEN V8 6312 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Transocean Ltd. [ RIG ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 06/15/2018
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Shares								660,000	D
Shares								32,436,351	I	See footnote(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
0.5% Exchangeable Senior Bonds due 2023	(2)							01/30/2018	01/30/2023	Shares	(2)		$355,611,000(2)	I	See footnote(1)

Explanation of Responses:

1. On March 16, 2018, Perestroika AS transferred 32,436,351 of its Shares of Transocean Ltd. (the "Company") and its 0.5% Exchangeable Senior Bonds due 2023 (the "Exchangeable Bonds") to Perestroika (Cyprus) Ltd. Perestroika (Cyprus) Ltd. is a wholly owned subsidiary of Perestroika AS. Mr. Mohn is the sole owner and director of Perestroika AS and is the beneficial owner of all securities owned by Perestroika AS and Perestroika (Cyprus) Ltd. While this change in the form of Perestroika AS's indirect beneficial ownership is exempt from reporting, this Form 4 is being voluntarily filed early to report this change.

2. The Exchangeable Bonds are issued by Transocean Inc., a wholly owned subsidiary of the Company, and fully and unconditionally guaranteed by the Company. The Exchangeable Bonds are exchangeable into Shares of the Company at an initial rate of 97.29756 Shares per $1,000 principal amount of Exchangeable Bonds, which initial rate is subject to adjustment in accordance with the Indenture, dated January 30, 2018, among Transocean Inc., the Company, Computershare Trust Company, N.A. and Computershare Trust Company of Canada. The Exchangeable Bonds are exchangeable at any time prior to and up to the maturity date of January 30, 2023.

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.

	Daniel Ro-Trock By Power of Attorney	06/15/2018
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.