Who owns NEBX
Which tracked institutional funds hold NEBX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See NEBX company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-02). 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
5 tracked funds added or opened NEBX while 4 trimmed or exited it between 2026-Q1 and 2026-Q2 — 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
NEBX’s largest tracked holder by dollar value, CITADEL ADVISORS LLC, 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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in NEBX 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 2026-Q1 and 2026-Q2, across 14 tracked filers holding NEBX, 11 increased or opened the position and 7 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 NEBX between the 2026-Q1 and 2026-Q2 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 3
- Client First Investment Management LLC$3M
- CITIGROUP INC$611K
- StoneX Group Inc.$557K
Full exits 2
- UBS Group AG$5M
- MIRAE ASSET SECURITIES (USA) INC.$966K
Largest adds
- CITADEL ADVISORS LLC$9M
- GOLDMAN SACHS GROUP INC$256K
Largest trims
- IMC-Chicago, LLC$803K
- Optiver Holding B.V.$349K
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 |
|---|---|---|---|---|
| CITADEL ADVISORS LLC added | 182,604 | $11M | 41.8% | 2026-Q2 |
| Client First Investment Management LLC new | 49,971 | $3M | 11.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 11,621 | $683K | 2.7% | 2026-Q2 |
| CITIGROUP INC new | 10,409 | $611K | 2.4% | 2026-Q2 |
| StoneX Group Inc. new | 5,147 | $557K | 2.2% | 2026-Q2 |
| Jump Financial, LLC trimmed | 6,036 | $355K | 1.4% | 2026-Q2 |
| IMC-Chicago, LLC trimmed | 5,056 | $297K | 1.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP new | 4,372 | $257K | 1.0% | 2026-Q2 |
| Optiver Holding B.V. trimmed | 2,949 | $173K | 0.7% | 2026-Q2 |
| SIMPLEX TRADING, LLC added | 2,756 | $162K | 0.6% | 2026-Q2 |
| EASTERN BANK new | 2,272 | $133K | 0.5% | 2026-Q2 |
| HOLLENCREST CAPITAL MANAGEMENT added | 51 | $3K | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) trimmed | 10 | $587 | 0.0% | 2026-Q2 |
| MORGAN STANLEY added | 3 | $176 | 0.0% | 2026-Q2 |
| UBS Group AG added | 150,510 | $5M | 18.9% | 2026-Q1 stale (1 quarter behind) |
| MIRAE ASSET SECURITIES (USA) INC. new | 30,000 | $966K | 3.8% | 2026-Q1 stale (1 quarter behind) |
| RENAISSANCE TECHNOLOGIES LLC added | 11,100 | $357K | 1.4% | 2026-Q1 stale (1 quarter behind) |
| Belvedere Trading LLC added | 7,821 | $252K | 1.0% | 2026-Q1 stale (1 quarter behind) |
| Essex LLC trimmed | 10,905 | $308K | 1.2% | 2025-Q4 stale (2 quarters behind) |
| GROUP ONE TRADING LLC added | 4,607 | $130K | 0.5% | 2025-Q4 stale (2 quarters behind) |
| JANE STREET GROUP, LLC new | 13,966 | $896K | 3.5% | 2025-Q3 stale (3 quarters behind) |
| FLOW TRADERS U.S. LLC new | 8,943 | $574K | 2.2% | 2025-Q3 stale (3 quarters behind) |
| OLD MISSION CAPITAL LLC new | 3,549 | $228K | 0.9% | 2025-Q3 stale (3 quarters behind) |
| Vontobel Holding Ltd. new | 3,400 | $218K | 0.9% | 2025-Q3 stale (3 quarters behind) |
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.