Company · Ownership research

Transocean Ltd. RIG

CIK 0001451505 · CUSIP H8817H100

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP H8817H100 (RIG), not CUSIP H8817H900 (RIG), CUSIP H8817H950 (RIG), and does not merge CUSIPs.

This page lists the top 20 of 426 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	VANGUARD GROUP INC CIK 102909 · View history	$205.14M 79,203,959 shares	0.00%	+631.16K(+0.80%)Added	SEC filing ↗ Aug 11, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$193.07M 74,542,856 shares	0.00%	+2.24M(+3.10%)Added	SEC filing ↗ Aug 12, 2025	▾
03	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$100.76M 38,901,527 shares	0.02%	-1.76M(-4.30%)Reduced	SEC filing ↗ Aug 12, 2025	▾
04	Capital World Investors CIK 1422849 · View history	$95.16M 36,740,356 shares	0.01%	+90.92K(+0.20%)Added	SEC filing ↗ Aug 13, 2025	▾
05	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$60.73M 23,449,768 shares	0.03%	+2.10M(+9.80%)Added	SEC filing ↗ Aug 12, 2025	▾
06	STATE STREET CORP CIK 93751 · View history	$53.80M 20,771,245 shares	0.00%	-38.70K(-0.20%)Reduced	SEC filing ↗ Aug 14, 2025	▾
07	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$48.10M 18,571,883 shares	0.09%	+4.90M(+35.90%)Added	SEC filing ↗ Aug 14, 2025	▾
08	MORGAN STANLEY CIK 895421 · View history	$47.72M 18,423,994 shares	0.00%	+6.48M(+54.30%)Added	SEC filing ↗ Aug 14, 2025	▾
09	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$46.87M 18,095,187 shares	0.00%	+313.67K(+1.80%)Added	SEC filing ↗ Aug 8, 2025	▾
10	PILGRIM GLOBAL ADVISORS LLC CIK 1963918 · View history	$45.59M 17,601,395 shares	9.64%	-248.06K(-1.40%)Reduced	SEC filing ↗ Aug 14, 2025	▾
11	TWO SIGMA ADVISERS, LP CIK 1478735 · View history	$41.59M 16,057,854 shares	0.09%	+6.28M(+64.20%)Added	SEC filing ↗ Aug 14, 2025	▾
12	VAN ECK ASSOCIATES CORP CIK 869178 · View history	$35.76M 13,805,367 shares	0.04%	-1.16M(-7.70%)Reduced	SEC filing ↗ Aug 14, 2025	▾
13	PRIMECAP MANAGEMENT CO/CA/ CIK 763212 · View history	$33.96M 13,112,822 shares	0.03%	-40.72M(-75.60%)Reduced	SEC filing ↗ Aug 11, 2025	▾
14	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$30.85M 11,909,694 shares	0.00%	-242.12K(-2.00%)Reduced	SEC filing ↗ Aug 14, 2025	▾
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$30.29M 11,694,525 shares	0.01%	-427.83K(-3.50%)Reduced	SEC filing ↗ Aug 12, 2025	▾
16	CITADEL ADVISORS LLC CIK 1423053 · View history	$28.99M 11,194,699 shares	0.03%	+7.92M(+242.20%)Added	SEC filing ↗ Aug 14, 2025	▾
17	KEYBANK NATIONAL ASSOCIATION/OH CIK 1089877 · View history	$28.07M 10,837,010 shares	0.10%	-2.64M(-19.60%)Reduced	SEC filing ↗ Aug 4, 2025	▾
18	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$27.55M 10,637,636 shares	0.04%	+4.09M(+62.40%)Added	SEC filing ↗ Aug 13, 2025	▾
19	UBS Group AG CIK 1610520 · View history	$20.14M 7,776,981 shares	0.00%	+2.83M(+57.20%)Added	SEC filing ↗ Aug 14, 2025	▾
20	NORTHERN TRUST CORP CIK 73124 · View history	$17.88M 6,902,661 shares	0.00%	-153.51K(-2.20%)Reduced	SEC filing ↗ Aug 13, 2025	▾

Showing 20 / 426 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

426

Cancelled or null records excluded

Disclosed shares

600,538,190

Not deduplicated across managers

Disclosed value

$1.56B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Transocean Ltd. · Q2 2025

Explore all 426 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.