% of shares outstanding is not shown for BUFX: 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 BUFX 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 | Mariner, LLC | 167,963167,963 | $4M | — | TRIM -3% |
| 2 | Atria Investments, Inc | 164,566164,566 | $3M | — | TRIM -4% |
| 3 | Western Wealth Management, LLC | 60,94360,943 | $1M | — | NEW |
| 4 | CITADEL ADVISORS LLC | 41,59241,592 | $877,703 | — | NEW |
| 5 | COMMONWEALTH EQUITY SERVICES, LLC | 19,60719,607 | $413,763 | — | ADD 12% |
| 6 | Cetera Investment Advisers | 12,39112,391 | $261,484 | — | NEW |
| 7 | Stonebridge Financial Planning Group, LLC | 9,9829,982 | $210,647 | — | NEW |
| 8 | Benson Wealth Management INC | 4,2194,219 | $89,032 | — | NEW |
| 9 | Steward Partners Investment Advisory, LLC | 2,1002,100 | $44,316 | — | — |
| 10 | OSAIC HOLDINGS, INC. | 1,1401,140 | $24,057 | — | — |
| 11 | HARBOUR INVESTMENTS, INC. | 185185 | $3,904 | — | NEW |
| 12 | UBS Group AG | 11 | $21 | — | TRIM -88% |
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 |
|---|---|---|---|---|---|---|---|
| Mariner, LLC | — | — | — | 130K | 173K | 168K | $4M |
| Atria Investments, Inc | — | — | — | 131K | 171K | 165K | $3M |
| Western Wealth Management, LLC | — | — | — | — | — | 61K | $1M |
| CITADEL ADVISORS LLC | — | — | 48K | — | — | 42K | $877,703 |
| COMMONWEALTH EQUITY SERVICES, LLC | — | — | — | — | 18K | 20K | $413,763 |
| Cetera Investment Advisers | — | — | — | — | — | 12K | $261,484 |
| Stonebridge Financial Planning Group, LLC | — | — | — | — | — | 10K | $210,647 |
| Benson Wealth Management INC | — | — | — | — | — | 4K | $89,032 |
| Steward Partners Investment Advisory, LLC | — | — | — | — | 2K | 2K | $44,316 |
| OSAIC HOLDINGS, INC. | — | — | — | 1K | 1K | 1K | $24,057 |
| HARBOUR INVESTMENTS, INC. | — | — | — | — | — | 185 | $3,904 |
| UBS Group AG | — | — | — | — | 8 | 1 | $21 |
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 | 12 | 484,689 | — | $10M |
| 2025-Q4 | 8 | 430,492 | — | $9M |
| 2025-Q3 | 5 | 325,657 | — | $7M |
| 2025-Q2 | 2 | 80,930 | — | $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 | |
|---|---|---|---|
| Western Wealth Management, LLC | +60,943 | $1M | OPEN |
| CITADEL ADVISORS LLC | +41,592 | $877,703 | OPEN |
| Cetera Investment Advisers | +12,391 | $261,484 | OPEN |
| Stonebridge Financial Planning Group, LLC | +9,982 | $210,647 | OPEN |
| Benson Wealth Management INC | +4,219 | $89,032 | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| GPS Wealth Strategies Group, LLC | −34,211 | $721,944 | CLOSE |
| OLD MISSION CAPITAL LLC | −31,600 | $666,845 | CLOSE |
| Atria Investments, Inc | −6,489 | $136,935 | TRIM |
| Mariner, LLC | −4,890 | $103,192 | TRIM |
| UBS Group AG | −7 | $148 | TRIM |
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).
