% of shares outstanding is not shown for NBIL: this is a fund line, and we hold no cover-page share count for it at any quarter — a fund's shares outstanding move with creations and redemptions rather than with issuance and buybacks, and it is not the SEC cover-page count this percentage is defined against. The figure is withheld rather than computed against a count that does not exist. Holder share counts are shown as filed.
Crowding percentile withheld — no market cap for NBIL in the served universe — the cohort is size-matched, and an unmatched percentile would compare a micro-cap register to a mega-cap one.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | Essex LLC | 131,632131,632 | $1M | — | ADD 103% |
| 2 | Optiver Holding B.V. | 103,936103,936 | $1M | — | ADD 156% |
| 3 | MIRAE ASSET SECURITIES (USA) INC. | 60,00060,000 | $621,600 | — | NEW |
| 4 | IMC-Chicago, LLC | 41,87841,878 | $433,856 | — | NEW |
| 5 | HRT FINANCIAL LP | 30,12830,128 | $312,000 | — | NEW |
| 6 | Scientech Research LLC | 18,91518,915 | $195,959 | — | NEW |
| 7 | Members Advisory Group LLC | 15,62215,622 | $161,844 | — | NEW |
| 8 | DUDLEY CAPITAL MANAGEMENT, LLC | 13,80013,800 | $142,968 | — | NEW |
| 9 | UBS Group AG | 4,2484,248 | $44,009 | — | NEW |
| 10 | SBI Securities Co., Ltd. | 4,0684,068 | $42,144 | — | NEW |
| 11 | Tower Research Capital LLC (TRC) | 55 | $52 | — | NEW |
Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| Essex LLC | — | — | — | — | 65K | 132K | $1M |
| Optiver Holding B.V. | — | — | — | — | 41K | 104K | $1M |
| MIRAE ASSET SECURITIES (USA) INC. | — | — | — | — | — | 60K | $621,600 |
| IMC-Chicago, LLC | — | — | — | — | — | 42K | $433,856 |
| HRT FINANCIAL LP | — | — | — | — | — | 30K | $312,000 |
| Scientech Research LLC | — | — | — | — | — | 19K | $195,959 |
| Members Advisory Group LLC | — | — | — | — | — | 16K | $161,844 |
| DUDLEY CAPITAL MANAGEMENT, LLC | — | — | — | — | — | 14K | $142,968 |
| UBS Group AG | — | — | — | — | — | 4K | $44,009 |
| SBI Securities Co., Ltd. | — | — | — | — | — | 4K | $42,144 |
| Tower Research Capital LLC (TRC) | — | — | — | — | — | 5 | $52 |
Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.
Holder count only — too few computable %-of-shares-outstanding quarters for a % pane. Line breaks are quarters with no 13F record, never interpolated.
| Quarter | Holders | Shares held | % shares out | Value held |
|---|---|---|---|---|
| 2026-Q1 | 11 | 424,232 | — | $4M |
| 2025-Q4 | 5 | 171,773 | — | $2M |
Short interest has its own tab now — open SI →
Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| Essex LLC | +66,892 | $693,001 | ADD |
| Optiver Holding B.V. | +63,308 | $655,871 | ADD |
| MIRAE ASSET SECURITIES (USA) INC. | +60,000 | $621,600 | OPEN |
| IMC-Chicago, LLC | +41,878 | $433,856 | OPEN |
| HRT FINANCIAL LP | +30,128 | $312,126 | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | −52,257 | $541,383 | CLOSE |
| TWO SIGMA SECURITIES, LLC | −12,694 | $131,510 | CLOSE |
| THURSTON, SPRINGER, MILLER, HERD & TITAK, INC. | −1,454 | $15,063 | CLOSE |
The 2025-Q4 register is as-filed in ITS OWN share basis; every count below was rebased into the 2026-Q1 basis (no split in between, factor 1). Dollar figures value the SHARE delta at one price — the 2026-03-31 close — rather than differencing two filings' own reported values, which would mix the quarter's price move into the trade figure.
13Fs disclose LONG US-listed positions only — shorts, most derivatives, bonds and non-US listings are invisible here, and a filer's quarter-over-quarter change is not necessarily a trade (index rebalances, in-kind transfers and entity successions all read as flow).
