Who owns Transocean (RIG)
Which tracked institutional funds hold RIG, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RIG company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
62 tracked funds added or opened RIG while 167 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
RIG’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes RIG more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in RIG divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 513 tracked filers holding RIG, 260 increased or opened the position and 249 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in RIG between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 28
- Castle Hook Partners LP$51M
- MACKENZIE FINANCIAL CORP$48M
- Assenagon Asset Management S.A.$37M
- Caledonia (Private) Investments Pty Ltd$27M
- Electron Capital Partners, LLC$23M
- MIZUHO SECURITIES USA LLC$21M
Full exits 39
- Driehaus Capital Management LLC$48M
- TUDOR INVESTMENT CORP ET AL$35M
- Empyrean Capital Partners, LP$30M
- Trexquant Investment LP$20M
- Quadrature Capital Ltd$17M
- Contrarius Group Holdings Ltd$16M
Largest adds
- UBS Group AG$89M
- RENAISSANCE TECHNOLOGIES LLC$50M
- Bridgewater Associates, LP$36M
- Point72 Asset Management, L.P.$33M
- Canoe Financial LP$19M
- Arvin Capital Management LP$13M
Largest trims
- MARSHALL WACE, LLP$101M
- TWO SIGMA INVESTMENTS, LP$82M
- DIMENSIONAL FUND ADVISORS LP$74M
- PILGRIM GLOBAL ADVISORS LLC$74M
- VANGUARD CAPITAL MANAGEMENT LLC$72M
- VANGUARD PORTFOLIO MANAGEMENT LLC$70M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 91,927,924 | $450M | 9.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 51,009,878 | $249M | 5.4% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 49,296,587 | $241M | 5.2% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 46,205,304 | $226M | 4.9% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 45,200,594 | $221M | 4.8% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 41,793,600 | $204M | 4.4% | 2026-Q2 |
| Slate Path Capital LP added | 37,266,300 | $182M | 3.9% | 2026-Q2 |
| Capital World Investors added | 30,973,850 | $151M | 3.3% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 28,561,101 | $140M | 3.0% | 2026-Q2 |
| STATE STREET CORP added | 27,148,850 | $133M | 2.9% | 2026-Q2 |
| MORGAN STANLEY added | 26,692,648 | $131M | 2.8% | 2026-Q2 |
| UBS Group AG added | 26,372,754 | $129M | 2.8% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 22,939,135 | $112M | 2.4% | 2026-Q2 |
| Dalal Street, LLC added | 20,398,659 | $100M | 2.1% | 2026-Q2 |
| VAN ECK ASSOCIATES CORP trimmed | 19,794,432 | $97M | 2.1% | 2026-Q2 |
| PILGRIM GLOBAL ADVISORS LLC trimmed | 17,377,307 | $85M | 1.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 16,798,179 | $82M | 1.8% | 2026-Q2 |
| Elliott Investment Management L.P. | 15,626,834 | $76M | 1.6% | 2026-Q2 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 14,795,082 | $72M | 1.6% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 14,527,153 | $71M | 1.5% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 14,172,810 | $69M | 1.5% | 2026-Q2 |
| GENDELL JEFFREY L added | 13,853,533 | $68M | 1.5% | 2026-Q2 |
| KEYBANK NATIONAL ASSOCIATION/OH added | 13,040,146 | $64M | 1.4% | 2026-Q2 |
| FIL Ltd added | 11,603,322 | $57M | 1.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 11,108,135 | $54M | 1.2% | 2026-Q2 |
| MIZUHO SECURITIES USA LLC added | 10,543,000 | $21M | 0.5% | 2026-Q2 |
| Castle Hook Partners LP new | 10,470,395 | $51M | 1.1% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 10,062,265 | $49M | 1.1% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 9,742,206 | $48M | 1.0% | 2026-Q2 |
| NORTHERN TRUST CORP added | 8,961,215 | $44M | 0.9% | 2026-Q2 |
| CWA Asset Management Group, LLC added | 8,688,877 | $42M | 0.9% | 2026-Q2 |
| Canoe Financial LP added | 8,682,600 | $42M | 0.9% | 2026-Q2 |
| Bridgewater Associates, LP added | 7,962,797 | $39M | 0.8% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 7,852,919 | $38M | 0.8% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 7,664,059 | $37M | 0.8% | 2026-Q2 |
| Ninepoint Partners LP | 7,000,000 | $34M | 0.7% | 2026-Q2 |
| ION Fund Management Ltd added | 6,750,000 | $33M | 0.7% | 2026-Q2 |
| Squarepoint Ops LLC added | 6,740,869 | $33M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 6,669,333 | $33M | 0.7% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 5,849,786 | $30M | 0.6% | 2026-Q2 |
| Caledonia (Private) Investments Pty Ltd new | 5,582,594 | $27M | 0.6% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 4,791,474 | $23M | 0.5% | 2026-Q2 |
| CIBC WORLD MARKET INC. trimmed | 4,747,864 | $23M | 0.5% | 2026-Q2 |
| Electron Capital Partners, LLC new | 4,652,185 | $23M | 0.5% | 2026-Q2 |
| Solus Alternative Asset Management LP | 4,470,000 | $22M | 0.5% | 2026-Q2 |
| TIG Advisors, LLC added | 3,981,919 | $19M | 0.4% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 3,766,158 | $18M | 0.4% | 2026-Q2 |
| Penn Capital Management Company, LLC added | 3,566,644 | $17M | 0.4% | 2026-Q2 |
| FMR LLC trimmed | 3,566,124 | $17M | 0.4% | 2026-Q2 |
| Man Group plc added | 3,447,729 | $17M | 0.4% | 2026-Q2 |
| Madison Asset Management, LLC | 3,030,000 | $15M | 0.3% | 2026-Q2 |
| Arvin Capital Management LP added | 2,982,831 | $15M | 0.3% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 2,815,057 | $14M | 0.3% | 2026-Q2 |
| Rokos Capital Management LLP trimmed | 2,619,483 | $13M | 0.3% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 2,608,633 | $13M | 0.3% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 2,543,245 | $12M | 0.3% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 2,528,283 | $12M | 0.3% | 2026-Q2 |
| PRIMECAP MANAGEMENT CO/CA/ trimmed | 2,493,290 | $12M | 0.3% | 2026-Q2 |
| Public Sector Pension Investment Board | 2,376,569 | $12M | 0.3% | 2026-Q2 |
| Nuveen, LLC trimmed | 2,329,295 | $11M | 0.2% | 2026-Q2 |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. trimmed | 2,102,868 | $10M | 0.2% | 2026-Q2 |
| Trek Financial, LLC added | 2,089,947 | $10M | 0.2% | 2026-Q2 |
| MASTERS CAPITAL MANAGEMENT LLC | 2,000,000 | $10M | 0.2% | 2026-Q2 |
| CAPITAL FUND MANAGEMENT S.A. new | 1,995,840 | $10M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 1,943,130 | $10M | 0.2% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 1,930,700 | $9M | 0.2% | 2026-Q2 |
| CASTLEARK MANAGEMENT LLC added | 1,813,160 | $9M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 1,804,318 | $9M | 0.2% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 1,785,212 | $9M | 0.2% | 2026-Q2 |
| Invesco Ltd. trimmed | 1,727,732 | $8M | 0.2% | 2026-Q2 |
| CLOUGH CAPITAL PARTNERS L P trimmed | 1,700,814 | $8M | 0.2% | 2026-Q2 |
| Creative Planning added | 1,632,895 | $8M | 0.2% | 2026-Q2 |
| Flat Footed LLC new | 1,603,778 | $8M | 0.2% | 2026-Q2 |
| Forvis Mazars Wealth Advisors, LLC trimmed | 1,502,697 | $7M | 0.2% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 1,427,890 | $7M | 0.2% | 2026-Q2 |
| Fideuram Asset Management (Ireland) dac added | 1,401,069 | $9M | 0.2% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 1,378,386 | $7M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 1,349,815 | $7M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 1,291,460 | $6M | 0.1% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 1,271,477 | $6M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,271,051 | $6M | 0.1% | 2026-Q2 |
| NOMURA HOLDINGS INC added | 1,161,607 | $6M | 0.1% | 2026-Q2 |
| Gotham Asset Management, LLC added | 1,144,956 | $6M | 0.1% | 2026-Q2 |
| Hosking Partners LLP trimmed | 1,142,083 | $6M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 1,118,604 | $5M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 1,078,828 | $5M | 0.1% | 2026-Q2 |
| Lloyd Harbor Capital Management, LLC trimmed | 1,075,100 | $5M | 0.1% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 1,055,592 | $5M | 0.1% | 2026-Q2 |
| IMC-Chicago, LLC added | 1,046,762 | $5M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 1,037,415 | $7M | 0.1% | 2026-Q2 |
| Legal & General Group Plc added | 997,222 | $5M | 0.1% | 2026-Q2 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC new | 990,804 | $5M | 0.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 986,927 | $5M | 0.1% | 2026-Q2 |
| BEACONLIGHT CAPITAL, LLC added | 977,964 | $5M | 0.1% | 2026-Q2 |
| Oxbow Advisors, LLC added | 959,604 | $5M | 0.1% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 958,097 | $5M | 0.1% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 911,722 | $5M | 0.1% | 2026-Q2 |
| KEATING INVESTMENT COUNSELORS INC added | 890,148 | $4M | 0.1% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 877,884 | $4M | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 839,078 | $4M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.