Who owns ONON (ONON)
Which tracked institutional funds hold ONON, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ONON 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 ONON is one-sided between 2025-Q4 and 2026-Q1: 79 added or opened and 233 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
ONON’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.0pp gap the other way — the median holder sizes ONON more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ONON 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 498 tracked filers holding ONON, 244 increased or opened the position and 300 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 ONON 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 42
- Ilex Capital Partners (UK) LLP$224M
- Alyeska Investment Group, L.P.$24M
- VANGUARD PORTFOLIO MANAGEMENT LLC$16M
- HRT FINANCIAL LP$16M
- Abu Dhabi Investment Council Co P.J.S.C$14M
- Eurizon Capital SGR S.p.A.$11M
Full exits 50
- MUFG Securities EMEA plc$56M
- T. Rowe Price Investment Management, Inc.$37M
- Interval Partners, LP$36M
- VANGUARD GROUP INC$32M
- Zurich Insurance Group Ltd/FI$25M
- Trexquant Investment LP$23M
Largest adds
- JANE STREET GROUP, LLC$140M
- UBS Group AG$80M
- BAMCO INC /NY/$79M
- GOLDMAN SACHS GROUP INC$34M
- FEDERATED HERMES, INC.$32M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$25M
Largest trims
- FMR LLC$569M
- MORGAN STANLEY$357M
- ALLIANCEBERNSTEIN L.P.$250M
- PLATINUM PARAMOUNT INVESTMENT LTD.$141M
- Sinvest Investments II Ltd.$105M
- SANDS CAPITAL MANAGEMENT, LLC$93M
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 |
|---|---|---|---|---|
| FMR LLC trimmed | 23,822,660 | $810M | 10.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 22,466,362 | $764M | 9.7% | 2026-Q1 |
| PLATINUM PARAMOUNT INVESTMENT LTD. | 11,312,048 | $385M | 4.9% | 2026-Q1 |
| BAMCO INC /NY/ added | 9,714,605 | $330M | 4.2% | 2026-Q1 |
| Sinvest Investments II Ltd. | 8,400,000 | $286M | 3.6% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 5,693,575 | $265M | 3.4% | 2026-Q1 |
| UBS Group AG added | 7,354,877 | $250M | 3.2% | 2026-Q1 |
| Ilex Capital Partners (UK) LLP added | 6,586,000 | $224M | 2.8% | 2026-Q1 |
| SANDS CAPITAL MANAGEMENT, LLC trimmed | 6,325,547 | $215M | 2.7% | 2026-Q1 |
| BlackRock, Inc. trimmed | 5,763,262 | $196M | 2.5% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 5,228,806 | $178M | 2.3% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 3,847,157 | $131M | 1.7% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 4,079,888 | $130M | 1.6% | 2026-Q1 |
| NORGES BANK added | 2,937,093 | $129M | 1.6% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 2,944,712 | $100M | 1.3% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 2,653,569 | $90M | 1.1% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 2,594,897 | $88M | 1.1% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 2,601,088 | $86M | 1.1% | 2026-Q1 |
| STATE STREET CORP added | 2,528,520 | $86M | 1.1% | 2026-Q1 |
| Select Equity Group, L.P. added | 2,466,291 | $84M | 1.1% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 2,149,871 | $73M | 0.9% | 2026-Q1 |
| Holocene Advisors, LP trimmed | 2,113,450 | $72M | 0.9% | 2026-Q1 |
| Clearbridge Investments, LLC trimmed | 1,968,883 | $67M | 0.8% | 2026-Q1 |
| JENNISON ASSOCIATES LLC trimmed | 1,957,674 | $67M | 0.8% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 1,877,239 | $64M | 0.8% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,835,806 | $62M | 0.8% | 2026-Q1 |
| FRANKLIN RESOURCES INC trimmed | 1,790,706 | $61M | 0.8% | 2026-Q1 |
| FengHe Fund Management Pte. Ltd. trimmed | 1,699,520 | $58M | 0.7% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 1,686,548 | $57M | 0.7% | 2026-Q1 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 1,530,016 | $52M | 0.7% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,523,601 | $52M | 0.7% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 1,290,031 | $44M | 0.6% | 2026-Q1 |
| MARSHALL WACE, LLP added | 1,264,008 | $43M | 0.5% | 2026-Q1 |
| ThornTree Capital Partners LP added | 1,197,338 | $41M | 0.5% | 2026-Q1 |
| BESSEMER GROUP INC added | 1,194,774 | $41M | 0.5% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 1,071,193 | $36M | 0.5% | 2026-Q1 |
| APEIRON CAPITAL Ltd added | 996,052 | $34M | 0.4% | 2026-Q1 |
| OGBORNE CAPITAL MANAGEMENT, LLC added | 951,175 | $32M | 0.4% | 2026-Q1 |
| Fiera Capital Corp added | 938,177 | $32M | 0.4% | 2026-Q1 |
| SG Americas Securities, LLC added | 880,329 | $30M | 0.4% | 2026-Q1 |
| Zurcher Kantonalbank (Zurich Cantonalbank) added | 871,728 | $30M | 0.4% | 2026-Q1 |
| CITIGROUP INC trimmed | 852,965 | $29M | 0.4% | 2026-Q1 |
| Pictet Asset Management Holding SA trimmed | 736,025 | $25M | 0.3% | 2026-Q1 |
| Alyeska Investment Group, L.P. trimmed | 700,000 | $24M | 0.3% | 2026-Q1 |
| BWCP, LP added | 680,733 | $23M | 0.3% | 2026-Q1 |
| Cerity Partners LLC trimmed | 677,133 | $23M | 0.3% | 2026-Q1 |
| Impax Asset Management Group plc added | 672,474 | $23M | 0.3% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC trimmed | 671,654 | $23M | 0.3% | 2026-Q1 |
| OSSIAM added | 671,512 | $23M | 0.3% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 654,664 | $22M | 0.3% | 2026-Q1 |
| VILLERE ST DENIS J & CO LLC trimmed | 615,787 | $21M | 0.3% | 2026-Q1 |
| Bridgewater Associates, LP added | 610,088 | $21M | 0.3% | 2026-Q1 |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC trimmed | 589,015 | $20M | 0.3% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 563,920 | $19M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 554,524 | $19M | 0.2% | 2026-Q1 |
| Manchester Global Management (UK) Ltd trimmed | 522,239 | $18M | 0.2% | 2026-Q1 |
| MANE GLOBAL CAPITAL MANAGEMENT LP trimmed | 505,316 | $17M | 0.2% | 2026-Q1 |
| GATES FOUNDATION TRUST | 500,000 | $17M | 0.2% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 497,619 | $17M | 0.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 475,322 | $16M | 0.2% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 474,328 | $16M | 0.2% | 2026-Q1 |
| Junto Capital Management LP trimmed | 469,735 | $16M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 464,817 | $16M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 445,805 | $15M | 0.2% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 429,291 | $15M | 0.2% | 2026-Q1 |
| Woodline Partners LP trimmed | 412,694 | $14M | 0.2% | 2026-Q1 |
| Abu Dhabi Investment Council Co P.J.S.C new | 403,352 | $14M | 0.2% | 2026-Q1 |
| ZEVENBERGEN CAPITAL INVESTMENTS LLC trimmed | 403,109 | $14M | 0.2% | 2026-Q1 |
| &PARTNERS added | 386,455 | $13M | 0.2% | 2026-Q1 |
| Arnhold LLC added | 374,000 | $13M | 0.2% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 370,684 | $13M | 0.2% | 2026-Q1 |
| Winslow Capital Management, LLC added | 4,766,825 | $248M | 3.1% | 2025-Q2 stale |
| Bond Capital Management, LP | 2,814,375 | $119M | 1.5% | 2025-Q3 stale |
| Anomaly Capital Management, LP added | 2,430,032 | $103M | 1.3% | 2025-Q3 stale |
| Durable Capital Partners LP trimmed | 2,265,569 | $100M | 1.3% | 2025-Q1 stale |
| MACQUARIE GROUP LTD trimmed | 2,028,204 | $86M | 1.1% | 2025-Q3 stale |
| 1832 Asset Management L.P. trimmed | 1,531,700 | $80M | 1.0% | 2025-Q2 stale |
| Qube Research & Technologies Ltd trimmed | 1,323,952 | $69M | 0.9% | 2025-Q2 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 1,120,400 | $58M | 0.7% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC added | 1,278,966 | $56M | 0.7% | 2025-Q1 stale |
| MUFG Securities EMEA plc new | 1,200,000 | $56M | 0.7% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 999,300 | $52M | 0.7% | 2025-Q2 stale |
| T. Rowe Price Investment Management, Inc. trimmed | 799,128 | $37M | 0.5% | 2025-Q4 stale |
| Interval Partners, LP trimmed | 783,605 | $36M | 0.5% | 2025-Q4 stale |
| Aberdeen Group plc added | 768,053 | $33M | 0.4% | 2025-Q3 stale |
| VANGUARD GROUP INC added | 689,076 | $32M | 0.4% | 2025-Q4 stale |
| Capital Research Global Investors trimmed | 687,313 | $30M | 0.4% | 2025-Q1 stale |
| Migdal Insurance & Financial Holdings Ltd. added | 680,646 | $29M | 0.4% | 2025-Q3 stale |
| Zurich Insurance Group Ltd/FI added | 537,432 | $25M | 0.3% | 2025-Q4 stale |
| Allspring Global Investments Holdings, LLC trimmed | 449,467 | $23M | 0.3% | 2025-Q2 stale |
| Trexquant Investment LP added | 499,770 | $23M | 0.3% | 2025-Q4 stale |
| Mediolanum International Funds Ltd trimmed | 434,743 | $23M | 0.3% | 2025-Q2 stale |
| AXIOM INVESTORS LLC /DE trimmed | 499,650 | $22M | 0.3% | 2025-Q1 stale |
| AXA S.A. added | 411,492 | $21M | 0.3% | 2025-Q2 stale |
| Artisan Partners Limited Partnership trimmed | 377,378 | $20M | 0.2% | 2025-Q2 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 422,321 | $19M | 0.2% | 2025-Q1 stale |
| KADENSA CAPITAL Ltd added | 344,249 | $18M | 0.2% | 2025-Q2 stale |
| AXA Investment Managers S.A. new | 403,702 | $17M | 0.2% | 2025-Q3 stale |
| FRONTIER CAPITAL MANAGEMENT CO LLC trimmed | 365,478 | $17M | 0.2% | 2025-Q4 stale |
| Wealth High Governance Capital Ltda trimmed | 300,000 | $13M | 0.2% | 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.