Who owns Ring Energy, Inc. (REI)
Which tracked institutional funds hold REI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See REI company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 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 REI is one-sided between 2025-Q4 and 2026-Q1: 36 added or opened and 5 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
REI’s largest tracked holder by dollar value, VANGUARD CAPITAL MANAGEMENT LLC, 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 REI more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in REI 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 126 tracked filers holding REI, 72 increased or opened the position and 47 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 REI 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 8
- VANGUARD CAPITAL MANAGEMENT LLC$11M
- VANGUARD PORTFOLIO MANAGEMENT LLC$5M
- Truffle Hound Capital, LLC$3M
- CastleKnight Management LP$2M
- VANGUARD FIDUCIARY TRUST CO$2M
- Quadrature Capital Ltd$653K
Full exits 3
- VANGUARD GROUP INC$10M
- TWO SIGMA ADVISERS, LP$761K
- GSA CAPITAL PARTNERS LLP$526K
Largest adds
- TWO SIGMA INVESTMENTS, LP$8M
- AMERIPRISE FINANCIAL INC$6M
- MILLENNIUM MANAGEMENT LLC$5M
- ACADIAN ASSET MANAGEMENT LLC$3M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$3M
- Connor, Clark & Lunn Investment Management Ltd.$3M
Largest trims
- VICTORY CAPITAL MANAGEMENT INC$432K
- Graham Capital Management, L.P.$365K
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 |
|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC new | 7,511,851 | $11M | 7.7% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 6,670,183 | $10M | 6.9% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 6,055,623 | $9M | 6.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 5,675,001 | $9M | 5.8% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 3,500,904 | $5M | 3.6% | 2026-Q1 |
| CDC Financial, Inc. trimmed | 3,459,562 | $5M | 3.6% | 2026-Q1 |
| UBS Group AG added | 3,298,569 | $5M | 3.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 3,099,997 | $5M | 3.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 3,049,959 | $5M | 3.1% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 2,628,942 | $4M | 2.7% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 2,510,097 | $4M | 2.6% | 2026-Q1 |
| Truffle Hound Capital, LLC new | 2,000,000 | $3M | 2.1% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,992,362 | $3M | 2.1% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 1,857,802 | $3M | 1.9% | 2026-Q1 |
| BlackRock, Inc. trimmed | 1,686,268 | $3M | 1.7% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 1,620,250 | $2M | 1.7% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 1,517,705 | $2M | 1.6% | 2026-Q1 |
| CastleKnight Management LP added | 1,361,217 | $2M | 1.4% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,175,932 | $2M | 1.2% | 2026-Q1 |
| Empowered Funds, LLC added | 1,167,286 | $2M | 1.2% | 2026-Q1 |
| PEAK6 LLC trimmed | 1,150,000 | $2M | 1.2% | 2026-Q1 |
| MARSHALL WACE, LLP added | 1,088,738 | $2M | 1.1% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 1,007,921 | $2M | 1.0% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 990,759 | $2M | 1.0% | 2026-Q1 |
| WINTON GROUP Ltd trimmed | 948,912 | $1M | 1.0% | 2026-Q1 |
| RBF Capital, LLC | 907,417 | $1M | 0.9% | 2026-Q1 |
| STATE STREET CORP added | 806,087 | $1M | 0.8% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 738,183 | $1M | 0.8% | 2026-Q1 |
| De Lisle Partners LLP added | 693,961 | $1M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 682,364 | $1M | 0.7% | 2026-Q1 |
| Quadrature Capital Ltd trimmed | 426,759 | $653K | 0.4% | 2026-Q1 |
| Quantbot Technologies LP added | 401,212 | $614K | 0.4% | 2026-Q1 |
| Invesco Ltd. added | 399,556 | $611K | 0.4% | 2026-Q1 |
| Voleon Capital Management LP new | 392,990 | $601K | 0.4% | 2026-Q1 |
| NORTHERN TRUST CORP added | 347,772 | $532K | 0.4% | 2026-Q1 |
| HRT FINANCIAL LP added | 303,588 | $464K | 0.3% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 286,013 | $438K | 0.3% | 2026-Q1 |
| SPROTT INC. | 285,000 | $436K | 0.3% | 2026-Q1 |
| MORGAN STANLEY added | 267,457 | $409K | 0.3% | 2026-Q1 |
| State of Wyoming trimmed | 259,026 | $396K | 0.3% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 248,012 | $379K | 0.3% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 227,812 | $349K | 0.2% | 2026-Q1 |
| OMERS ADMINISTRATION Corp trimmed | 208,800 | $319K | 0.2% | 2026-Q1 |
| XTX Topco Ltd trimmed | 194,867 | $298K | 0.2% | 2026-Q1 |
| Caitong International Asset Management Co., Ltd added | 190,157 | $291K | 0.2% | 2026-Q1 |
| Catalyst Funds Management Pty Ltd | 168,500 | $258K | 0.2% | 2026-Q1 |
| RITHOLTZ WEALTH MANAGEMENT new | 162,001 | $248K | 0.2% | 2026-Q1 |
| MANGROVE PARTNERS IM, LLC trimmed | 145,771 | $223K | 0.1% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD trimmed | 140,500 | $215K | 0.1% | 2026-Q1 |
| Metis Global Partners, LLC trimmed | 124,709 | $191K | 0.1% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 122,721 | $188K | 0.1% | 2026-Q1 |
| Vanguard Personalized Indexing Management, LLC trimmed | 118,871 | $182K | 0.1% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 110,938 | $170K | 0.1% | 2026-Q1 |
| Graham Capital Management, L.P. trimmed | 102,801 | $157K | 0.1% | 2026-Q1 |
| INVESTMENT ADVISORY SERVICES INC /TX /ADV | 100,000 | $153K | 0.1% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 97,041 | $148K | 0.1% | 2026-Q1 |
| Linscomb Wealth, Inc. | 92,272 | $141K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 88,956 | $136K | 0.1% | 2026-Q1 |
| FMR LLC trimmed | 84,373 | $129K | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 75,765 | $122K | 0.1% | 2026-Q1 |
| LPL Financial LLC trimmed | 78,337 | $120K | 0.1% | 2026-Q1 |
| Cetera Investment Advisers trimmed | 55,955 | $86K | 0.1% | 2026-Q1 |
| Founders Capital Management added | 55,200 | $84K | 0.1% | 2026-Q1 |
| VAN DEN BERG MANAGEMENT I, INC trimmed | 53,191 | $81K | 0.1% | 2026-Q1 |
| R Squared Ltd added | 51,950 | $79K | 0.1% | 2026-Q1 |
| Centiva Capital, LP added | 49,682 | $76K | 0.1% | 2026-Q1 |
| WARBURG PINCUS LLC trimmed | 14,393,652 | $11M | 7.6% | 2025-Q2 stale |
| VANGUARD GROUP INC added | 11,248,939 | $10M | 6.6% | 2025-Q4 stale |
| Aristotle Capital Boston, LLC trimmed | 1,453,884 | $1M | 0.8% | 2025-Q2 stale |
| SEGALL BRYANT & HAMILL, LLC trimmed | 853,319 | $981K | 0.7% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP trimmed | 875,200 | $761K | 0.5% | 2025-Q4 stale |
| PANAGORA ASSET MANAGEMENT INC added | 620,256 | $713K | 0.5% | 2025-Q1 stale |
| GSA CAPITAL PARTNERS LLP trimmed | 604,791 | $526K | 0.4% | 2025-Q4 stale |
| Nuveen, LLC new | 437,412 | $503K | 0.3% | 2025-Q1 stale |
| Watchman Group, Inc. | 500,000 | $435K | 0.3% | 2025-Q4 stale |
| SEI INVESTMENTS CO trimmed | 417,167 | $331K | 0.2% | 2025-Q2 stale |
| FIRST TRUST ADVISORS LP trimmed | 380,054 | $302K | 0.2% | 2025-Q2 stale |
| Atom Investors LP trimmed | 239,442 | $275K | 0.2% | 2025-Q1 stale |
| FRANKLIN RESOURCES INC trimmed | 232,267 | $267K | 0.2% | 2025-Q1 stale |
| RHUMBLINE ADVISERS added | 221,965 | $255K | 0.2% | 2025-Q1 stale |
| ALLIANCEBERNSTEIN L.P. | 197,530 | $227K | 0.2% | 2025-Q1 stale |
| DEUTSCHE BANK AG\ trimmed | 189,088 | $217K | 0.1% | 2025-Q1 stale |
| EntryPoint Capital, LLC added | 180,360 | $207K | 0.1% | 2025-Q1 stale |
| Gallagher Fiduciary Advisors, LLC added | 174,070 | $200K | 0.1% | 2025-Q1 stale |
| Atria Investments, Inc added | 173,583 | $200K | 0.1% | 2025-Q1 stale |
| Aster Capital Management (DIFC) Ltd new | 213,904 | $170K | 0.1% | 2025-Q2 stale |
| Man Group plc added | 150,657 | $164K | 0.1% | 2025-Q3 stale |
| Jain Global LLC new | 184,600 | $147K | 0.1% | 2025-Q2 stale |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) trimmed | 127,376 | $146K | 0.1% | 2025-Q1 stale |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 107,561 | $124K | 0.1% | 2025-Q1 stale |
| INTECH INVESTMENT MANAGEMENT LLC added | 93,597 | $108K | 0.1% | 2025-Q1 stale |
| Cubist Systematic Strategies, LLC added | 95,413 | $104K | 0.1% | 2025-Q3 stale |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 88,633 | $102K | 0.1% | 2025-Q1 stale |
| Y-Intercept (Hong Kong) Ltd new | 121,716 | $97K | 0.1% | 2025-Q2 stale |
| PRINCIPAL FINANCIAL GROUP INC added | 118,921 | $94K | 0.1% | 2025-Q2 stale |
| HSBC HOLDINGS PLC added | 110,825 | $91K | 0.1% | 2025-Q2 stale |
| Corebridge Financial, Inc. trimmed | 72,603 | $83K | 0.1% | 2025-Q1 stale |
| MACKENZIE FINANCIAL CORP added | 100,981 | $80K | 0.1% | 2025-Q2 stale |
| MetLife Investment Management, LLC added | 66,197 | $76K | 0.1% | 2025-Q1 stale |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 95,600 | $76K | 0.1% | 2025-Q2 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.