RIG · Transocean Ltd. · Shareholders & Ownership

$5.86 -0.04 (-0.59%)

Russell 2000 member Rebalance outlook locked

Market Cap

$6.58B

1.12B

Volume · Oct 20 19.05M Avg daily vol (3M) 42.4M

Every disclosed holder of RIG in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns RIG

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	545	995,317,577	89.12%	Yes
Insiders (Forms 3, 4, 5)	12	296,385,350	26.54%	Yes
13D/G-only blocks	1	68,551,328	6.14%	Yes
Remaining	—	243,374,170	-21.79%	Negative
Registered funds (N-PORT, not summed)	105	146,157,718	13.09%	No

Shares outstanding: 1,116,880,085, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of RIG

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Mohn Frederik Wilhelm Insider CIK 1729638 · May 26, 2026 Director, issuer-wide	96,653,798	8.65%	+56,756	May 26, 2026	Director, issuer-wide
1.1	Frederik W. Mohn 13D CIK 1729638 · Unknown · Feb 9, 2026 not summed	96,918,301	8.68%	+1,500,000	Feb 9, 2026	not summed
2	Perestroika Insider CIK 1729635 · Nov 24, 2025 Director, issuer-wide	96,574,894	8.65%	+1,500,000	Nov 24, 2025	Director, issuer-wide
3	Perestroika (Cyprus) Ltd Insider CIK 1737912 · Nov 24, 2025 Director, issuer-wide	96,574,894	8.65%	+1,500,000	Nov 24, 2025	Director, issuer-wide
4	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	91,927,924	8.23%	+3,556,676	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	iShares U.S. Oil Equipment & Services ETF Fund S000009416 · Registered fund · Jun 30, 2026 iShares Trust, not summed	2,144,936	0.19%	-55,828	Jun 30, 2026	iShares Trust, not summed
4.2	iShares ESG Aware MSCI USA Small-Cap ETF Fund S000061604 · Registered fund · May 31, 2026 iShares Trust, not summed	185,549	0.02%	—	May 31, 2026	iShares Trust, not summed
4.3	iShares MSCI World Small-Cap ETF Fund S000091430 · Registered fund · May 31, 2026 iShares Trust, not summed	57,954	0.01%	—	May 31, 2026	iShares Trust, not summed
5	VANGUARD GROUP INC 13G CIK 102909 · Registered investment adviser · Dec 29, 2023 Rule 13d-1(b), qualified institution	68,551,328	6.14%	—	Dec 29, 2023	Rule 13d-1(b), qualified institution
6	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	51,009,878	4.57%	+2,190,302	Jun 30, 2026	carried, not yet filed for the newest quarter
6.1	Dimensional US Small Cap Value ETF Fund S000075151 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	5,349,601	0.48%	+431,025	Jul 31, 2026	Dimensional ETF Trust, not summed
6.2	Dimensional U.S. Targeted Value ETF Fund S000070901 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	5,144,533	0.46%	+47,811	Jul 31, 2026	Dimensional ETF Trust, not summed
6.3	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	3,717,075	0.33%	+287,710	Jul 31, 2026	Dimensional ETF Trust, not summed
6.4	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	2,571,795	0.23%	+191,091	Jul 31, 2026	Dimensional ETF Trust, not summed
6.5	Dimensional U.S. Equity Market ETF Fund S000070902 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	306,907	0.03%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
7	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	49,296,587	4.41%	+2,433,857	Jun 30, 2026	carried, not yet filed for the newest quarter
8	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	46,205,304	4.14%	-258,432	Jun 30, 2026	carried, not yet filed for the newest quarter
9	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	45,200,594	4.05%	+928,171	Jun 30, 2026	carried, not yet filed for the newest quarter
10	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	41,793,600	3.74%	+2,531,001	Jun 30, 2026	carried, not yet filed for the newest quarter
11	Slate Path Capital LP 13F CIK 1559706 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	37,266,300	3.34%	+7,204,200	Jun 30, 2026	carried, not yet filed for the newest quarter
12	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	31,846,243	2.85%	+417,382	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
13	Capital World Investors 13F CIK 1422849 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	30,973,850	2.77%	+1,398,371	Jun 30, 2026	carried, not yet filed for the newest quarter
14	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	28,561,101	2.56%	+5,089,504	Jun 30, 2026	carried, not yet filed for the newest quarter
15	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	27,148,850	2.43%	+2,166,646	Jun 30, 2026	carried, not yet filed for the newest quarter
16	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	26,692,648	2.39%	+4,999,584	Jun 30, 2026	carried, not yet filed for the newest quarter
17	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	26,372,754	2.36%	+20,319,471	Jun 30, 2026	carried, not yet filed for the newest quarter
18	VANGUARD SMALL-CAP INDEX FUND Fund S000002845 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	23,057,232	2.06%	+169,675	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
19	AMERICAN CENTURY COMPANIES INC 13F CIK 748054 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	22,939,135	2.05%	+179,954	Jun 30, 2026	carried, not yet filed for the newest quarter
19.1	Small Company Fund Fund S000005981 · Registered fund · Jun 30, 2026 American Century Quantitative Equity Funds, Inc., not summed	29,079	0.00%	-2,142	Jun 30, 2026	American Century Quantitative Equity Funds, Inc., not summed
20	Dalal Street, LLC 13F CIK 1549575 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	20,398,659	1.83%	+5,987	Jun 30, 2026	carried, not yet filed for the newest quarter
21	VAN ECK ASSOCIATES CORP 13F CIK 869178 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	19,794,432	1.77%	-1,342,697	Jun 30, 2026	carried, not yet filed for the newest quarter
22	Avantis U.S. Small Cap Value ETF Fund S000066459 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	17,553,539	1.57%	-1,282,225	May 31, 2026	American Century ETF Trust, not summed
23	PILGRIM GLOBAL ADVISORS LLC 13F CIK 1963918 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	17,377,307	1.56%	-6,535,813	Jun 30, 2026	carried, not yet filed for the newest quarter
24	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	16,798,179	1.50%	+3,896,797	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Elliott Investment Management L.P. 13F CIK 1791786 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	15,626,834	1.40%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
26	VOLORIDGE INVESTMENT MANAGEMENT, LLC 13F CIK 1556921 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	14,795,082	1.32%	-1,747,635	Jun 30, 2026	carried, not yet filed for the newest quarter
27	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	14,527,153	1.30%	+11,392,425	Jun 30, 2026	carried, not yet filed for the newest quarter
28	Point72 Asset Management, L.P. 13F CIK 1603466 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	14,172,810	1.27%	+8,766,385	Jun 30, 2026	carried, not yet filed for the newest quarter
29	GENDELL JEFFREY L 13F CIK 1056581 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	13,853,533	1.24%	+2,153,533	Jun 30, 2026	carried, not yet filed for the newest quarter
30	VANGUARD SMALL-CAP GROWTH INDEX FUND Fund S000002846 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	13,305,396	1.19%	+482,862	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
31	KEYBANK NATIONAL ASSOCIATION/OH 13F CIK 1089877 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	13,040,146	1.17%	+383,265	Jun 30, 2026	carried, not yet filed for the newest quarter
32	FIL Ltd 13F CIK 318989 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	11,603,322	1.04%	+362,507	Jun 30, 2026	carried, not yet filed for the newest quarter
33	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	11,505,431	1.03%	+447,033	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
34	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	11,108,135	0.99%	+2,505,812	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Castle Hook Partners LP 13F CIK 1687241 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	10,470,395	0.94%	+10,470,395	Jun 30, 2026	carried, not yet filed for the newest quarter
36	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	10,062,265	0.90%	+251,407	Jun 30, 2026	carried, not yet filed for the newest quarter
37	MACKENZIE FINANCIAL CORP 13F CIK 919859 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	9,742,206	0.87%	+9,742,206	Jun 30, 2026	carried, not yet filed for the newest quarter
38	HRT FINANCIAL LP 13F CIK 1475597 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	9,522,046	0.85%	+8,094,220	Jun 30, 2026	carried, not yet filed for the newest quarter
39	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	8,961,215	0.80%	+818,671	Jun 30, 2026	carried, not yet filed for the newest quarter
39.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	499,844	0.04%	+70,870	Jun 30, 2026	Northern Funds, not summed
39.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	97,706	0.01%	-2,785	Jun 30, 2026	Northern Funds, not summed
40	Canoe Financial LP 13F CIK 1908219 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	8,682,600	0.78%	+5,111,200	Jun 30, 2026	carried, not yet filed for the newest quarter
41	CWA Asset Management Group, LLC 13F CIK 1667134 · Registered investment adviser · Sep 30, 2026	7,962,959	0.71%	-725,918	Sep 30, 2026
42	Bridgewater Associates, LP 13F CIK 1350694 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	7,962,797	0.71%	+7,544,366	Jun 30, 2026	carried, not yet filed for the newest quarter
43	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	7,852,919	0.70%	+1,621,573	Jun 30, 2026	carried, not yet filed for the newest quarter
44	Ninepoint Partners LP 13F CIK 1715635 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	7,000,000	0.63%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
45	ION Fund Management Ltd 13F CIK 2105906 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,750,000	0.60%	+2,261,600	Jun 30, 2026	carried, not yet filed for the newest quarter
46	Squarepoint Ops LLC 13F CIK 1642575 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,740,869	0.60%	+2,533,142	Jun 30, 2026	carried, not yet filed for the newest quarter
47	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	6,669,333	0.60%	+257,944	Jun 30, 2026	carried, not yet filed for the newest quarter
48	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	5,849,786	0.52%	+1,363,042	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Caledonia (Private) Investments Pty Ltd 13F CIK 1352924 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	5,582,594	0.50%	+5,582,594	Jun 30, 2026	carried, not yet filed for the newest quarter
50	VANGUARD ENERGY INDEX FUND Fund S000004448 · Registered fund · May 31, 2026 VANGUARD WORLD FUND, not summed	5,487,343	0.49%	+209,204	May 31, 2026	VANGUARD WORLD FUND, not summed

5 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 603 holders

Create a free account to page through every holder, filter by source and group by ultimate parent.

Key facts CIK 1451505 CUSIP H8817H100 13F (30d) 58 filings 58 filers Visit website Investor relations