Who owns TONX (TONX)
Which tracked institutional funds hold TONX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See TONX 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 TONX is one-sided between 2025-Q4 and 2026-Q1: 10 added or opened and 2 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
TONX’s largest tracked holder by dollar value, TOMS Capital Investment Management LP, sizes it at 1.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in TONX 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 40 tracked filers holding TONX, 19 increased or opened the position and 34 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 TONX 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 2
- VANGUARD CAPITAL MANAGEMENT LLC$6M
- VANGUARD FIDUCIARY TRUST CO$738K
Full exits 1
- VANGUARD GROUP INC$2M
Largest adds
- ARISTEIA CAPITAL, L.L.C.$2M
- UBS Group AG$2M
- Ribbit Management Company, LLC$757K
- DRW Securities, LLC$336K
- GEODE CAPITAL MANAGEMENT, LLC$332K
- BlackRock, Inc.$324K
Largest trims
- MARSHALL WACE, LLP$340K
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 |
|---|---|---|---|---|
| ARISTEIA CAPITAL, L.L.C. added | 4,895,110 | $12M | 15.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,287,988 | $6M | 7.1% | 2026-Q1 |
| Ribbit Management Company, LLC | 1,577,287 | $4M | 4.9% | 2026-Q1 |
| Saba Capital Management, L.P. trimmed | 791,268 | $2M | 2.5% | 2026-Q1 |
| DRW Securities, LLC trimmed | 788,644 | $2M | 2.5% | 2026-Q1 |
| BlackRock, Inc. trimmed | 720,883 | $2M | 2.2% | 2026-Q1 |
| UBS Group AG added | 686,441 | $2M | 2.1% | 2026-Q1 |
| Yorkville Advisors Global, LP | 600,000 | $1M | 1.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 580,526 | $1M | 1.8% | 2026-Q1 |
| Arrington Capital Management, LLC | 378,549 | $935K | 1.2% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 298,819 | $738K | 0.9% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 270,797 | $669K | 0.8% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 217,125 | $536K | 0.7% | 2026-Q1 |
| STATE STREET CORP | 213,456 | $527K | 0.7% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP new | 200,695 | $496K | 0.6% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 181,768 | $449K | 0.6% | 2026-Q1 |
| IEQ CAPITAL, LLC trimmed | 126,446 | $312K | 0.4% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 113,158 | $280K | 0.4% | 2026-Q1 |
| NORTHERN TRUST CORP added | 104,668 | $259K | 0.3% | 2026-Q1 |
| Summit Trail Advisors, LLC added | 66,965 | $165K | 0.2% | 2026-Q1 |
| ParaFi Capital LP new | 50,380 | $124K | 0.2% | 2026-Q1 |
| Brevan Howard Capital Management LP new | 39,228 | $97K | 0.1% | 2026-Q1 |
| OMERS ADMINISTRATION Corp trimmed | 35,600 | $88K | 0.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 31,299 | $77K | 0.1% | 2026-Q1 |
| Capital Investment Advisors, LLC | 21,030 | $52K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 20,990 | $52K | 0.1% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 19,399 | $48K | 0.1% | 2026-Q1 |
| Catalyst Funds Management Pty Ltd new | 18,300 | $45K | 0.1% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 12,694 | $31K | 0.0% | 2026-Q1 |
| Virtu Financial LLC trimmed | 11,083 | $27K | 0.0% | 2026-Q1 |
| GTS SECURITIES LLC trimmed | 10,019 | $25K | 0.0% | 2026-Q1 |
| SIMPLEX TRADING, LLC trimmed | 4,229 | $10K | 0.0% | 2026-Q1 |
| MORGAN STANLEY trimmed | 3,612 | $9K | 0.0% | 2026-Q1 |
| OSAIC HOLDINGS, INC. | 2,400 | $6K | 0.0% | 2026-Q1 |
| SBI Securities Co., Ltd. added | 1,352 | $3K | 0.0% | 2026-Q1 |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | 725 | $2K | 0.0% | 2026-Q1 |
| BARCLAYS PLC new | 628 | $2K | 0.0% | 2026-Q1 |
| CITIGROUP INC new | 179 | $442 | 0.0% | 2026-Q1 |
| Bogart Wealth, LLC | 100 | $247 | 0.0% | 2026-Q1 |
| Allworth Financial LP | 1 | $3 | 0.0% | 2026-Q1 |
| TOMS Capital Investment Management LP new | 2,318,522 | $16M | 20.6% | 2025-Q3 stale |
| Polar Asset Management Partners Inc. new | 992,269 | $7M | 8.8% | 2025-Q3 stale |
| One Fin Capital Management LP new | 700,000 | $5M | 6.2% | 2025-Q3 stale |
| Alyeska Investment Group, L.P. new | 679,597 | $5M | 6.0% | 2025-Q3 stale |
| MASO CAPITAL PARTNERS Ltd new | 262,881 | $2M | 2.3% | 2025-Q3 stale |
| VANGUARD GROUP INC | 770,753 | $2M | 1.9% | 2025-Q4 stale |
| Empyrean Capital Partners, LP new | 192,621 | $1M | 1.7% | 2025-Q3 stale |
| Tekne Capital Management, LLC new | 157,810 | $1M | 1.4% | 2025-Q3 stale |
| XTX Topco Ltd new | 59,138 | $416K | 0.5% | 2025-Q3 stale |
| CITADEL ADVISORS LLC new | 52,405 | $369K | 0.5% | 2025-Q3 stale |
| Cable Car Capital, LP | 110,000 | $219K | 0.3% | 2025-Q4 stale |
| RENAISSANCE TECHNOLOGIES LLC new | 109,400 | $218K | 0.3% | 2025-Q4 stale |
| Verition Fund Management LLC trimmed | 93,396 | $186K | 0.2% | 2025-Q4 stale |
| METEORA CAPITAL, LLC trimmed | 87,716 | $175K | 0.2% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP new | 72,013 | $143K | 0.2% | 2025-Q4 stale |
| JANE STREET GROUP, LLC added | 59,644 | $119K | 0.1% | 2025-Q4 stale |
| Aristides Capital LLC new | 46,900 | $93K | 0.1% | 2025-Q4 stale |
| Luxor Capital Group, LP trimmed | 45,510 | $91K | 0.1% | 2025-Q4 stale |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 43,682 | $87K | 0.1% | 2025-Q4 stale |
| GSA CAPITAL PARTNERS LLP new | 28,238 | $56K | 0.1% | 2025-Q4 stale |
| Quadrature Capital Ltd new | 27,849 | $55K | 0.1% | 2025-Q4 stale |
| Pantera Capital Partners LP trimmed | 27,051 | $54K | 0.1% | 2025-Q4 stale |
| Jump Financial, LLC new | 22,711 | $45K | 0.1% | 2025-Q4 stale |
| GROUP ONE TRADING LLC new | 21,551 | $43K | 0.1% | 2025-Q4 stale |
| Marex Group plc added | 20,000 | $40K | 0.1% | 2025-Q4 stale |
| Jefferies Financial Group Inc. trimmed | 12,255 | $24K | 0.0% | 2025-Q4 stale |
| Brooklands Fund Management Ltd new | 4,000 | $10K | 0.0% | 2025-Q4 stale |
| Tower Research Capital LLC (TRC) added | 4,796 | $10K | 0.0% | 2025-Q4 stale |
| BANK OF AMERICA CORP /DE/ trimmed | 2,735 | $5K | 0.0% | 2025-Q4 stale |
| RAYMOND JAMES FINANCIAL INC new | 247 | $2K | 0.0% | 2025-Q2 stale |
| Global Retirement Partners, LLC | 4 | $8 | 0.0% | 2025-Q4 stale |
| NewEdge Advisors, LLC | 1 | $7 | 0.0% | 2025-Q3 stale |
| FLAGSHIP HARBOR ADVISORS, LLC new | 2 | $4 | 0.0% | 2025-Q4 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale |
| ROYAL BANK OF CANADA new | 15 | — | 0.0% | 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.