% of shares outstanding is not shown for MUNX: 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 MUNX 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 | Cerity Partners LLC | 40,00040,000 | $991,108 | — | — |
| 2 | Family Office Research LLC | 28,70528,705 | $711,232 | — | NEW |
| 3 | JANE STREET GROUP, LLC | 27,93627,936 | $692,190 | — | ADD 36% |
| 4 | ROYAL BANK OF CANADA | 20,01520,015 | $496,000 | — | ADD 6594% |
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 |
|---|---|---|---|---|---|---|---|
| Cerity Partners LLC | — | — | — | — | 40K | 40K | $991,108 |
| Family Office Research LLC | — | — | — | — | — | 29K | $711,232 |
| JANE STREET GROUP, LLC | — | — | — | — | 21K | 28K | $692,190 |
| ROYAL BANK OF CANADA | — | — | — | — | 299 | 20K | $496,000 |
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 | 4 | 116,656 | — | $3M |
| 2025-Q4 | 3 | 60,840 | — | $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 | |
|---|---|---|---|
| Family Office Research LLC | +28,705 | $711,244 | OPEN |
| ROYAL BANK OF CANADA | +19,716 | $488,517 | ADD |
| JANE STREET GROUP, LLC | +7,395 | $183,231 | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| No filer reduced its position this quarter. | |||
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).
