Who owns ONE Gas (OGS)
Which tracked institutional funds hold OGS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OGS 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 OGS is one-sided between 2026-Q1 and 2026-Q2: 13 added or opened and 227 trimmed or exited — on balance reducing.
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
OGS’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 OGS more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in OGS 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 424 tracked filers holding OGS, 212 increased or opened the position and 171 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 OGS 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 3
- RENAISSANCE TECHNOLOGIES LLC$9M
- Brevan Howard Capital Management LP$1M
- BALYASNY ASSET MANAGEMENT L.P.$1M
Full exits 222
- VANGUARD PORTFOLIO MANAGEMENT LLC$309M
- AMERICAN CENTURY COMPANIES INC$291M
- VANGUARD CAPITAL MANAGEMENT LLC$239M
- T. Rowe Price Investment Management, Inc.$160M
- GEODE CAPITAL MANAGEMENT, LLC$136M
- ALLIANCEBERNSTEIN L.P.$117M
Largest adds
- BlackRock, Inc.$55M
- AQR CAPITAL MANAGEMENT LLC$43M
- ExodusPoint Capital Management, LP$26M
- NORGES BANK$22M
- Point72 Asset Management, L.P.$18M
- FMR LLC$14M
Largest trims
- WELLINGTON MANAGEMENT GROUP LLP$174M
- STATE STREET CORP$10M
- TUDOR INVESTMENT CORP ET AL$3M
- MILLENNIUM MANAGEMENT LLC$1M
- D. E. Shaw & Co., Inc.$304K
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. added | 9,099,077 | $701M | 13.8% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 3,589,993 | $309M | 6.1% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 3,375,393 | $291M | 5.7% | 2026-Q1 |
| STATE STREET CORP added | 3,268,798 | $252M | 5.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,776,005 | $239M | 4.7% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. added | 1,861,962 | $160M | 3.2% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,580,865 | $136M | 2.7% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 1,515,835 | $117M | 2.3% | 2026-Q1 |
| Energy Income Partners, LLC added | 1,331,076 | $115M | 2.3% | 2026-Q1 |
| EARNEST PARTNERS LLC trimmed | 1,153,128 | $99M | 2.0% | 2026-Q1 |
| Boston Trust Walden Corp trimmed | 1,086,259 | $94M | 1.8% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 1,011,383 | $87M | 1.7% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 1,119,752 | $86M | 1.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 944,791 | $81M | 1.6% | 2026-Q1 |
| MORGAN STANLEY trimmed | 883,599 | $76M | 1.5% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 866,242 | $75M | 1.5% | 2026-Q1 |
| NORGES BANK added | 879,121 | $68M | 1.3% | 2026-Q2 |
| Bank of New York Mellon Corp added | 763,877 | $66M | 1.3% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 755,452 | $65M | 1.3% | 2026-Q1 |
| NORTHERN TRUST CORP added | 728,867 | $63M | 1.2% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 720,187 | $62M | 1.2% | 2026-Q1 |
| Nuveen, LLC trimmed | 705,333 | $61M | 1.2% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 644,166 | $55M | 1.1% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 650,349 | $50M | 1.0% | 2026-Q2 |
| DUFF & PHELPS INVESTMENT MANAGEMENT CO | 576,000 | $50M | 1.0% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 627,285 | $48M | 1.0% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 552,351 | $48M | 0.9% | 2026-Q1 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 529,160 | $46M | 0.9% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 503,289 | $43M | 0.9% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 428,658 | $37M | 0.7% | 2026-Q1 |
| ProShare Advisors LLC trimmed | 411,249 | $35M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 391,412 | $34M | 0.7% | 2026-Q1 |
| Rockefeller Capital Management L.P. added | 391,067 | $34M | 0.7% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 388,497 | $33M | 0.7% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 373,703 | $32M | 0.6% | 2026-Q1 |
| CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC new | 371,334 | $32M | 0.6% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 393,090 | $30M | 0.6% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 303,744 | $26M | 0.5% | 2026-Q1 |
| Legal & General Group Plc trimmed | 288,893 | $25M | 0.5% | 2026-Q1 |
| Invesco Ltd. added | 299,800 | $23M | 0.5% | 2026-Q2 |
| FMR LLC added | 291,441 | $22M | 0.4% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 280,660 | $22M | 0.4% | 2026-Q2 |
| UBS Group AG trimmed | 222,049 | $19M | 0.4% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 201,803 | $17M | 0.3% | 2026-Q1 |
| GABELLI FUNDS LLC | 190,800 | $16M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 189,893 | $16M | 0.3% | 2026-Q1 |
| Man Group plc added | 184,926 | $16M | 0.3% | 2026-Q1 |
| Retirement Systems of Alabama added | 182,906 | $16M | 0.3% | 2026-Q1 |
| Tidal Investments LLC added | 157,188 | $14M | 0.3% | 2026-Q1 |
| EXCHANGE TRADED CONCEPTS, LLC added | 155,197 | $13M | 0.3% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 152,127 | $13M | 0.3% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 149,712 | $13M | 0.3% | 2026-Q1 |
| First Eagle Investment Management, LLC added | 160,764 | $12M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 134,825 | $12M | 0.2% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 129,386 | $11M | 0.2% | 2026-Q1 |
| Swiss National Bank | 118,313 | $10M | 0.2% | 2026-Q1 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC added | 115,582 | $10M | 0.2% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 113,145 | $10M | 0.2% | 2026-Q1 |
| BOKF, NA trimmed | 110,906 | $10M | 0.2% | 2026-Q1 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS trimmed | 106,420 | $9M | 0.2% | 2026-Q1 |
| Meiji Yasuda Asset Management Co Ltd. added | 106,191 | $9M | 0.2% | 2026-Q1 |
| BTG Pactual Asset Management US LLC added | 105,278 | $9M | 0.2% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 101,180 | $9M | 0.2% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 110,900 | $9M | 0.2% | 2026-Q2 |
| Clearbridge Investments, LLC trimmed | 98,722 | $9M | 0.2% | 2026-Q1 |
| Aristotle Capital Boston, LLC trimmed | 98,035 | $8M | 0.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 100,785 | $8M | 0.2% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 82,740 | $7M | 0.1% | 2026-Q1 |
| CANADA LIFE ASSURANCE Co trimmed | 81,164 | $7M | 0.1% | 2026-Q1 |
| HEARTLAND ADVISORS INC trimmed | 80,438 | $7M | 0.1% | 2026-Q1 |
| Allianz Asset Management GmbH added | 79,754 | $7M | 0.1% | 2026-Q1 |
| SEI INVESTMENTS CO added | 79,565 | $7M | 0.1% | 2026-Q1 |
| SG Americas Securities, LLC trimmed | 79,398 | $7M | 0.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 79,166 | $7M | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 87,037 | $7M | 0.1% | 2026-Q2 |
| HENNESSY ADVISORS INC | 76,075 | $7M | 0.1% | 2026-Q1 |
| MARTINGALE ASSET MANAGEMENT L P added | 72,815 | $6M | 0.1% | 2026-Q1 |
| BARCLAYS PLC trimmed | 72,722 | $6M | 0.1% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC trimmed | 71,337 | $6M | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM added | 71,146 | $6M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 70,430 | $6M | 0.1% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 69,522 | $6M | 0.1% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC trimmed | 65,088 | $6M | 0.1% | 2026-Q1 |
| SEGALL BRYANT & HAMILL, LLC trimmed | 63,709 | $5M | 0.1% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 61,561 | $5M | 0.1% | 2026-Q1 |
| MetLife Investment Management, LLC trimmed | 61,240 | $5M | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 59,613 | $5M | 0.1% | 2026-Q1 |
| Aventail Capital Group, LP added | 58,432 | $5M | 0.1% | 2026-Q1 |
| CAPITAL FUND MANAGEMENT S.A. trimmed | 58,325 | $5M | 0.1% | 2026-Q1 |
| Magellan Asset Management Ltd added | 57,731 | $5M | 0.1% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 63,896 | $5M | 0.1% | 2026-Q2 |
| VANGUARD GROUP INC trimmed | 6,489,014 | $501M | 9.9% | 2025-Q4 stale |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 475,413 | $36M | 0.7% | 2025-Q1 stale |
| Verition Fund Management LLC added | 161,685 | $13M | 0.3% | 2025-Q3 stale |
| SIR Capital Management, L.P. new | 162,523 | $13M | 0.2% | 2025-Q4 stale |
| Burkehill Global Management, LP new | 100,000 | $7M | 0.1% | 2025-Q2 stale |
| Corebridge Financial, Inc. trimmed | 89,793 | $7M | 0.1% | 2025-Q1 stale |
| Cobler Capital Management, LLC new | 91,813 | $6M | 0.1% | 2025-Q2 stale |
| MARSHALL WACE, LLP added | 81,594 | $6M | 0.1% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC trimmed | 67,000 | $5M | 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.