Who owns IONQ (IONQ)
Which tracked institutional funds hold IONQ, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See IONQ 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 IONQ is one-sided between 2025-Q4 and 2026-Q1: 68 added or opened and 264 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
IONQ’s largest tracked holder by dollar value, VANGUARD GROUP 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 IONQ more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in IONQ 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 634 tracked filers holding IONQ, 358 increased or opened the position and 313 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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 IONQ 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 35
- VANGUARD PORTFOLIO MANAGEMENT LLC$444M
- VANGUARD CAPITAL MANAGEMENT LLC$434M
- VANGUARD FIDUCIARY TRUST CO$69M
- HRT FINANCIAL LP$44M
- Alyeska Investment Group, L.P.$32M
- HEIGHTS CAPITAL MANAGEMENT, INC$24M
Full exits 40
- VANGUARD GROUP INC$1.5B
- Trybe Capital Management LP$24M
- Connor, Clark & Lunn Investment Management Ltd.$21M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$9M
- GROUP ONE TRADING LLC$6M
- AXIOM INVESTORS LLC /DE$6M
Largest adds
- MILLENNIUM MANAGEMENT LLC$778M
- Defiance ETFs, LLC$245M
- CITADEL ADVISORS LLC$81M
- TWO SIGMA INVESTMENTS, LP$60M
- JANE STREET GROUP, LLC$41M
- NATIONAL BANK OF CANADA /FI/$38M
Largest trims
- BlackRock, Inc.$661M
- MORGAN STANLEY$268M
- NORGES BANK$151M
- PRICE T ROWE ASSOCIATES INC /MD/$139M
- STATE STREET CORP$135M
- GEODE CAPITAL MANAGEMENT, LLC$119M
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 |
|---|---|---|---|---|
| MILLENNIUM MANAGEMENT LLC trimmed | 45,000 | $778M | 10.1% | 2026-Q1 |
| BlackRock, Inc. trimmed | 23,893,857 | $689M | 8.9% | 2026-Q1 |
| MORGAN STANLEY added | 21,159,892 | $610M | 7.9% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 15,389,580 | $444M | 5.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 15,064,048 | $434M | 5.6% | 2026-Q1 |
| Defiance ETFs, LLC added | 9,702,302 | $280M | 3.6% | 2026-Q1 |
| STATE STREET CORP added | 9,270,862 | $267M | 3.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 8,440,065 | $243M | 3.1% | 2026-Q1 |
| Marex Group plc trimmed | 4,005,912 | $115M | 1.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 3,553,733 | $102M | 1.3% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 3,235,305 | $93M | 1.2% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 3,222,600 | $93M | 1.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 2,901,900 | $84M | 1.1% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 2,380,191 | $69M | 0.9% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 2,343,951 | $68M | 0.9% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 1,901,383 | $55M | 0.7% | 2026-Q1 |
| Clear Street Group Inc. trimmed | 1,831,530 | $53M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp added | 1,815,366 | $52M | 0.7% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 1,808,351 | $52M | 0.7% | 2026-Q1 |
| NORGES BANK trimmed | 2,206,950 | $49M | 0.6% | 2026-Q1 |
| Legal & General Group Plc added | 1,593,717 | $46M | 0.6% | 2026-Q1 |
| Pacer Advisors, Inc. added | 1,206,542 | $43M | 0.6% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 1,451,705 | $42M | 0.5% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,436,659 | $41M | 0.5% | 2026-Q1 |
| FMR LLC trimmed | 1,411,191 | $41M | 0.5% | 2026-Q1 |
| WESTFIELD CAPITAL MANAGEMENT CO LP added | 1,373,788 | $40M | 0.5% | 2026-Q1 |
| NATIONAL BANK OF CANADA /FI/ added | 1,333,373 | $38M | 0.5% | 2026-Q1 |
| Nuveen, LLC trimmed | 1,286,223 | $37M | 0.5% | 2026-Q1 |
| VAN ECK ASSOCIATES CORP added | 1,247,702 | $36M | 0.5% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 1,221,885 | $35M | 0.5% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 1,126,099 | $32M | 0.4% | 2026-Q1 |
| Alyeska Investment Group, L.P. new | 1,116,071 | $32M | 0.4% | 2026-Q1 |
| CANTOR FITZGERALD, L. P. trimmed | 1,077,326 | $31M | 0.4% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 1,075,857 | $31M | 0.4% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ trimmed | 1,035,633 | $30M | 0.4% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 968,203 | $28M | 0.4% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 930,320 | $27M | 0.3% | 2026-Q1 |
| Amundi trimmed | 926,989 | $27M | 0.3% | 2026-Q1 |
| EverSource Wealth Advisors, LLC added | 63,408 | $26M | 0.3% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 886,284 | $26M | 0.3% | 2026-Q1 |
| Swiss National Bank added | 866,648 | $25M | 0.3% | 2026-Q1 |
| Penserra Capital Management LLC added | 816,169 | $24M | 0.3% | 2026-Q1 |
| HEIGHTS CAPITAL MANAGEMENT, INC new | 815,542 | $24M | 0.3% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 814,960 | $23M | 0.3% | 2026-Q1 |
| LANSDOWNE PARTNERS (UK) LLP added | 795,585 | $23M | 0.3% | 2026-Q1 |
| UNICOM Systems, Inc. | 768,900 | $22M | 0.3% | 2026-Q1 |
| Ghisallo Capital Management LLC new | 750,000 | $22M | 0.3% | 2026-Q1 |
| Chevy Chase Trust Holdings, LLC added | 731,800 | $21M | 0.3% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 465,507 | $21M | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 783,422 | $21M | 0.3% | 2026-Q1 |
| LPL Financial LLC added | 657,100 | $19M | 0.2% | 2026-Q1 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 648,919 | $19M | 0.2% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 647,457 | $19M | 0.2% | 2026-Q1 |
| Clearbridge Investments, LLC trimmed | 615,724 | $18M | 0.2% | 2026-Q1 |
| NOMURA HOLDINGS INC added | 600,494 | $17M | 0.2% | 2026-Q1 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 567,593 | $16M | 0.2% | 2026-Q1 |
| Quadrature Capital Ltd trimmed | 565,293 | $16M | 0.2% | 2026-Q1 |
| Rockefeller Capital Management L.P. added | 552,329 | $16M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 542,613 | $16M | 0.2% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 527,700 | $15M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 499,845 | $14M | 0.2% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 471,897 | $14M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 469,698 | $14M | 0.2% | 2026-Q1 |
| EMERALD ADVISERS, LLC trimmed | 447,729 | $13M | 0.2% | 2026-Q1 |
| Mubadala Investment Co PJSC | 428,520 | $12M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 421,295 | $12M | 0.2% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 415,598 | $12M | 0.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 415,307 | $12M | 0.2% | 2026-Q1 |
| Eurizon Capital SGR S.p.A. added | 393,452 | $11M | 0.1% | 2026-Q1 |
| CAPITAL ADVISORS INC/OK added | 347,166 | $10M | 0.1% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 336,924 | $10M | 0.1% | 2026-Q1 |
| Vident Advisory, LLC added | 336,262 | $10M | 0.1% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 314,118 | $9M | 0.1% | 2026-Q1 |
| Invesco Ltd. trimmed | 311,727 | $9M | 0.1% | 2026-Q1 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 305,354 | $9M | 0.1% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 303,140 | $9M | 0.1% | 2026-Q1 |
| Orion Investment Co added | 278,764 | $8M | 0.1% | 2026-Q1 |
| EMERALD MUTUAL FUND ADVISERS TRUST | 277,668 | $8M | 0.1% | 2026-Q1 |
| AVIVA PLC added | 228,671 | $7M | 0.1% | 2026-Q1 |
| SBI Securities Co., Ltd. trimmed | 215,746 | $6M | 0.1% | 2026-Q1 |
| Tidal Investments LLC added | 213,448 | $6M | 0.1% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 208,594 | $6M | 0.1% | 2026-Q1 |
| Jump Financial, LLC trimmed | 196,863 | $6M | 0.1% | 2026-Q1 |
| HAMILTON LANE ADVISORS LLC | 195,000 | $6M | 0.1% | 2026-Q1 |
| OSAIC HOLDINGS, INC. trimmed | 194,503 | $6M | 0.1% | 2026-Q1 |
| MetLife Investment Management, LLC added | 188,244 | $5M | 0.1% | 2026-Q1 |
| Man Group plc added | 185,357 | $5M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 34,337,539 | $1.5B | 20.0% | 2025-Q4 stale |
| NASPERS LTD new | 1,233,585 | $76M | 1.0% | 2025-Q3 stale |
| Trybe Capital Management LP new | 532,998 | $24M | 0.3% | 2025-Q4 stale |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 476,906 | $21M | 0.3% | 2025-Q4 stale |
| Y-Intercept (Hong Kong) Ltd added | 297,344 | $18M | 0.2% | 2025-Q3 stale |
| QVT Financial LP added | 239,228 | $15M | 0.2% | 2025-Q3 stale |
| Aquatic Capital Management LLC added | 224,290 | $14M | 0.2% | 2025-Q3 stale |
| Quantitative Investment Management, LLC trimmed | 197,700 | $12M | 0.2% | 2025-Q3 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 197,693 | $9M | 0.1% | 2025-Q4 stale |
| GROUP ONE TRADING LLC added | 141,647 | $6M | 0.1% | 2025-Q4 stale |
| AXIOM INVESTORS LLC /DE trimmed | 140,677 | $6M | 0.1% | 2025-Q4 stale |
| FORSTA AP-FONDEN new | 122,312 | $5M | 0.1% | 2025-Q4 stale |
| STRATEGIC PLANNING GROUP, LLC added | 119,291 | $5M | 0.1% | 2025-Q4 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.