Who owns RIG (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-Q1 13F filings. 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
The tracked-fund tape on RIG is one-sided between 2025-Q4 and 2026-Q1: 203 added or opened and 53 trimmed or exited — on balance accumulating.
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 0.1% of theirs — a 0.1pp 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 2025-Q4 and 2026-Q1, across 536 tracked filers holding RIG, 306 increased or opened the position and 203 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 2025-Q4 and 2026-Q1 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 49
- VANGUARD PORTFOLIO MANAGEMENT LLC$311M
- VANGUARD CAPITAL MANAGEMENT LLC$294M
- Slate Path Capital LP$199M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$110M
- Elliott Investment Management L.P.$104M
- Driehaus Capital Management LLC$48M
Full exits 23
- VANGUARD GROUP INC$395M
- TWO SIGMA ADVISERS, LP$92M
- Zimmer Partners, LP$18M
- Qube Research & Technologies Ltd$11M
- Brandywine Global Investment Management, LLC$10M
- MIZUHO SECURITIES USA LLC$10M
Largest adds
- TWO SIGMA INVESTMENTS, LP$208M
- D. E. Shaw & Co., Inc.$192M
- DIMENSIONAL FUND ADVISORS LP$144M
- Capital World Investors$131M
- MARSHALL WACE, LLP$106M
- BlackRock, Inc.$98M
Largest trims
- BARCLAYS PLC$27M
- Jefferies Financial Group Inc.$18M
- RENAISSANCE TECHNOLOGIES LLC$17M
- Ensign Peak Advisors, Inc$13M
- Walleye Trading LLC$12M
- JANE STREET GROUP, LLC$8M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 69,719,650 | $462M | 7.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 48,819,576 | $324M | 5.2% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 46,862,730 | $311M | 5.0% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 46,463,736 | $308M | 5.0% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 44,272,423 | $294M | 4.8% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 39,262,599 | $260M | 4.2% | 2026-Q1 |
| Slate Path Capital LP added | 30,062,100 | $199M | 3.2% | 2026-Q1 |
| Capital World Investors added | 29,575,479 | $196M | 3.2% | 2026-Q1 |
| STATE STREET CORP added | 24,982,204 | $166M | 2.7% | 2026-Q1 |
| PILGRIM GLOBAL ADVISORS LLC trimmed | 23,913,120 | $159M | 2.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 23,471,597 | $156M | 2.5% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 22,759,181 | $151M | 2.4% | 2026-Q1 |
| MORGAN STANLEY trimmed | 21,693,064 | $144M | 2.3% | 2026-Q1 |
| VAN ECK ASSOCIATES CORP added | 21,137,129 | $140M | 2.3% | 2026-Q1 |
| Dalal Street, LLC trimmed | 20,392,672 | $135M | 2.2% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 16,542,717 | $110M | 1.8% | 2026-Q1 |
| MARSHALL WACE, LLP added | 16,043,386 | $106M | 1.7% | 2026-Q1 |
| Elliott Investment Management L.P. added | 15,626,834 | $104M | 1.7% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 12,901,382 | $86M | 1.4% | 2026-Q1 |
| KEYBANK NATIONAL ASSOCIATION/OH added | 12,656,881 | $84M | 1.4% | 2026-Q1 |
| GENDELL JEFFREY L added | 11,700,000 | $78M | 1.3% | 2026-Q1 |
| FIL Ltd added | 11,240,815 | $75M | 1.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 9,810,858 | $65M | 1.1% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 8,602,323 | $57M | 0.9% | 2026-Q1 |
| NORTHERN TRUST CORP added | 8,142,544 | $54M | 0.9% | 2026-Q1 |
| Driehaus Capital Management LLC added | 7,210,869 | $48M | 0.8% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 6,411,389 | $43M | 0.7% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 6,231,346 | $41M | 0.7% | 2026-Q1 |
| UBS Group AG added | 6,053,283 | $40M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp added | 5,698,827 | $38M | 0.6% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 5,406,425 | $36M | 0.6% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 5,278,418 | $35M | 0.6% | 2026-Q1 |
| CWA Asset Management Group, LLC new | 5,204,952 | $35M | 0.6% | 2026-Q1 |
| CIBC WORLD MARKET INC. trimmed | 5,203,488 | $34M | 0.6% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 4,691,515 | $31M | 0.5% | 2026-Q1 |
| Empyrean Capital Partners, LP new | 4,570,463 | $30M | 0.5% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 4,486,744 | $30M | 0.5% | 2026-Q1 |
| ION Fund Management Ltd added | 4,488,400 | $30M | 0.5% | 2026-Q1 |
| Nuveen, LLC added | 4,475,271 | $30M | 0.5% | 2026-Q1 |
| Solus Alternative Asset Management LP | 4,470,000 | $30M | 0.5% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 4,207,727 | $28M | 0.5% | 2026-Q1 |
| FMR LLC added | 3,860,639 | $26M | 0.4% | 2026-Q1 |
| CLOUGH CAPITAL PARTNERS L P trimmed | 3,610,967 | $24M | 0.4% | 2026-Q1 |
| Canoe Financial LP new | 3,571,400 | $24M | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 3,514,711 | $23M | 0.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 3,246,615 | $22M | 0.3% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 3,246,221 | $22M | 0.3% | 2026-Q1 |
| Rokos Capital Management LLP added | 3,169,572 | $21M | 0.3% | 2026-Q1 |
| Penn Capital Management Company, LLC trimmed | 3,152,566 | $21M | 0.3% | 2026-Q1 |
| Man Group plc added | 3,151,637 | $21M | 0.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 3,134,728 | $21M | 0.3% | 2026-Q1 |
| Jump Financial, LLC added | 3,097,365 | $21M | 0.3% | 2026-Q1 |
| Trexquant Investment LP added | 3,075,885 | $20M | 0.3% | 2026-Q1 |
| Madison Asset Management, LLC | 3,030,000 | $20M | 0.3% | 2026-Q1 |
| HSBC HOLDINGS PLC trimmed | 2,916,902 | $19M | 0.3% | 2026-Q1 |
| BARCLAYS PLC trimmed | 2,655,218 | $18M | 0.3% | 2026-Q1 |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. added | 2,597,366 | $17M | 0.3% | 2026-Q1 |
| Quadrature Capital Ltd added | 2,592,119 | $17M | 0.3% | 2026-Q1 |
| PRIMECAP MANAGEMENT CO/CA/ trimmed | 2,573,290 | $17M | 0.3% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 2,510,772 | $17M | 0.3% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 2,506,575 | $17M | 0.3% | 2026-Q1 |
| TIG Advisors, LLC new | 2,496,226 | $17M | 0.3% | 2026-Q1 |
| Contrarius Group Holdings Ltd added | 2,470,095 | $16M | 0.3% | 2026-Q1 |
| Public Sector Pension Investment Board trimmed | 2,376,569 | $16M | 0.3% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 2,176,482 | $14M | 0.2% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 2,033,136 | $13M | 0.2% | 2026-Q1 |
| MASTERS CAPITAL MANAGEMENT LLC added | 2,000,000 | $13M | 0.2% | 2026-Q1 |
| Burkehill Global Management, LP trimmed | 2,000,000 | $13M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 1,961,930 | $13M | 0.2% | 2026-Q1 |
| Invesco Ltd. added | 1,819,494 | $12M | 0.2% | 2026-Q1 |
| Aquatic Capital Management LLC added | 1,766,695 | $12M | 0.2% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 1,645,200 | $11M | 0.2% | 2026-Q1 |
| Forvis Mazars Wealth Advisors, LLC trimmed | 1,641,917 | $11M | 0.2% | 2026-Q1 |
| Creative Planning added | 1,581,635 | $10M | 0.2% | 2026-Q1 |
| Trek Financial, LLC added | 1,567,435 | $10M | 0.2% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC added | 1,555,152 | $10M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 1,472,926 | $10M | 0.2% | 2026-Q1 |
| HRT FINANCIAL LP added | 1,427,826 | $9M | 0.2% | 2026-Q1 |
| Packer & Co Ltd new | 1,405,000 | $9M | 0.2% | 2026-Q1 |
| ALGERT GLOBAL LLC trimmed | 1,387,490 | $9M | 0.1% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 1,376,944 | $9M | 0.1% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 1,374,546 | $9M | 0.1% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 1,341,392 | $9M | 0.1% | 2026-Q1 |
| Lloyd Harbor Capital Management, LLC trimmed | 1,324,900 | $9M | 0.1% | 2026-Q1 |
| Hosking Partners LLP added | 1,322,948 | $9M | 0.1% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 1,234,579 | $8M | 0.1% | 2026-Q1 |
| Thrivent Financial for Lutherans added | 1,221,388 | $8M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 95,636,795 | $395M | 6.4% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 22,213,154 | $92M | 1.5% | 2025-Q4 stale |
| Ghisallo Capital Management LLC new | 18,500,000 | $58M | 0.9% | 2025-Q3 stale |
| Yaupon Capital Management LP added | 8,250,000 | $26M | 0.4% | 2025-Q3 stale |
| CARRONADE CAPITAL MANAGEMENT, LP added | 23,625,000 | $24M | 0.4% | 2025-Q2 stale |
| Ninepoint Partners LP new | 6,000,000 | $19M | 0.3% | 2025-Q3 stale |
| Zimmer Partners, LP trimmed | 4,463,252 | $18M | 0.3% | 2025-Q4 stale |
| Ion Asset Management Ltd. added | 4,197,679 | $13M | 0.2% | 2025-Q3 stale |
| Qube Research & Technologies Ltd added | 2,700,622 | $11M | 0.2% | 2025-Q4 stale |
| Brandywine Global Investment Management, LLC added | 2,523,548 | $10M | 0.2% | 2025-Q4 stale |
| MIZUHO SECURITIES USA LLC new | 7,287,000 | $10M | 0.2% | 2025-Q4 stale |
| SEVEN GRAND MANAGERS, LLC new | 2,750,000 | $9M | 0.1% | 2025-Q3 stale |
| Cubist Systematic Strategies, LLC trimmed | 2,665,961 | $8M | 0.1% | 2025-Q3 stale |
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.