Who owns SUPX
Which tracked institutional funds hold SUPX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SUPX company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-15). 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
3 tracked funds added or opened SUPX while 6 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
SUPX’s largest tracked holder by dollar value, Yong Rong (HK) Asset Management Ltd, sizes it at 7.8% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 7.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in SUPX 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 23 tracked filers holding SUPX, 16 increased or opened the position and 14 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 SUPX 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 1
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$2M
Full exits 1
- CloudAlpha Capital Management Limited/Hong Kong$8M
Largest adds
- UBS Group AG$2M
- MORGAN STANLEY$637K
Largest trims
- Yong Rong (HK) Asset Management Ltd$26M
- Anatole Investment Management Ltd$9M
- CITIGROUP INC$5M
- SG Americas Securities, LLC$571K
- Boundless Plain Holdings Ltd$414K
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 |
|---|---|---|---|---|
| Yong Rong (HK) Asset Management Ltd trimmed | 2,139,556 | $17M | 32.8% | 2026-Q1 |
| Anatole Investment Management Ltd | 1,800,000 | $14M | 27.6% | 2026-Q1 |
| UBS Group AG added | 311,301 | $2M | 4.8% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP new | 210,000 | $2M | 3.2% | 2026-Q1 |
| CITIGROUP INC trimmed | 193,706 | $2M | 3.0% | 2026-Q1 |
| SG Americas Securities, LLC added | 101,111 | $809K | 1.5% | 2026-Q1 |
| MORGAN STANLEY added | 94,192 | $754K | 1.4% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 57,400 | $459K | 0.9% | 2026-Q1 |
| Boundless Plain Holdings Ltd | 53,897 | $431K | 0.8% | 2026-Q1 |
| NOMURA HOLDINGS INC added | 31,170 | $249K | 0.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 24,889 | $199K | 0.4% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL new | 17,288 | $138K | 0.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC new | 16,119 | $129K | 0.2% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC new | 13,292 | $106K | 0.2% | 2026-Q1 |
| AXQ CAPITAL, LP new | 11,864 | $95K | 0.2% | 2026-Q1 |
| STATE STREET CORP trimmed | 10,541 | $84K | 0.2% | 2026-Q1 |
| BARCLAYS PLC added | 8,300 | $66K | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 6,780 | $61K | 0.1% | 2026-Q1 |
| BlackRock, Inc. added | 5,435 | $43K | 0.1% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN | 200 | $2K | 0.0% | 2026-Q1 |
| Bell Investment Advisors, Inc new | 52 | $416 | 0.0% | 2026-Q1 |
| OSAIC HOLDINGS, INC. | 10 | $80 | 0.0% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 19 | — | 0.0% | 2026-Q1 |
| CloudAlpha Capital Management Limited/Hong Kong added | 513,592 | $8M | 15.4% | 2025-Q4 stale |
| JANE STREET GROUP, LLC new | 7,517 | $485K | 0.9% | 2025-Q3 stale |
| Scientech Research LLC new | 5,925 | $382K | 0.7% | 2025-Q3 stale |
| Quadrature Capital Ltd new | 22,591 | $354K | 0.7% | 2025-Q4 stale |
| MANGROVE PARTNERS IM, LLC new | 21,710 | $340K | 0.7% | 2025-Q4 stale |
| Swiss National Bank new | 19,700 | $309K | 0.6% | 2025-Q4 stale |
| TWO SIGMA SECURITIES, LLC new | 4,764 | $307K | 0.6% | 2025-Q3 stale |
| XTX Topco Ltd new | 16,049 | $252K | 0.5% | 2025-Q4 stale |
| BNP PARIBAS FINANCIAL MARKETS new | 3,816 | $246K | 0.5% | 2025-Q3 stale |
| CITADEL ADVISORS LLC added | 22,273 | $225K | 0.4% | 2025-Q2 stale |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM new | 10,726 | $168K | 0.3% | 2025-Q4 stale |
| Aristides Capital LLC new | 10,646 | $167K | 0.3% | 2025-Q4 stale |
| KLP KAPITALFORVALTNING AS new | 2,100 | $33K | 0.1% | 2025-Q4 stale |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO new | 2,100 | $33K | 0.1% | 2025-Q4 stale |
| Legal & General Group Plc new | 1,429 | $22K | 0.0% | 2025-Q4 stale |
| BANK OF AMERICA CORP /DE/ trimmed | 23 | $361 | 0.0% | 2025-Q4 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 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.