Who owns ONE Gas, Inc., from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
STATE STREET CORPORATION: 5.2% · 3,268,798 shares
Wellington Management Group LLP: 4.2% · 2,605,332 shares — Wellington Group Holdings LLP: 4.2% · 2,605,332 shares — Wellington Investment Advisors Holdings LLP: 4.2% · 2,605,332 shares
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Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of ONE Gas, Inc. they hold. Together these 511 managers report 104.62% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. | $701M | 9,099,077 | 0.01% | 14.48% | June 30, 2026 |
| VANGUARD GROUP INC | $501M | 6,489,014 | 0.01% | 10.32% | December 31, 2025 |
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Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 405 funds hold 51.00% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | $165M | 0.13% | 3.41% | June 30, 2026 |
| VANGUARD TOTAL STOCK MARKET INDEX FUND | $153M | 0.01% | 3.17% | June 30, 2026 |
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