MBVIU · M3-Brigade Acquisition VI Corp. · Holdings
Substantial doubt about the company's ability to continue as a going concern.
“In connection with the Company's assessment of going concern considerations in accordance with ASC 205-40, "Presentation of Financial Statements - Going Concern," management has determined that the Company's projected liquidity condition raises substantial doubt about the Company's ability to continue as a going concern. Management intends to address this liquidity need through Working Capital Loans from the Sponsor or its affiliates and by completing a Business Combination; however, there can be no assurance that these plans will be successfully implemented. The financial statements do not include any adjustments that might result from the outcome of this uncertainty.”View the 10-Q filed Aug 14, 2026
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Who Holds MBVIU
Last 5 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 16 filers, like-for-like change +11.2%; actively managed books +11.2%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 17.4% | 6 | -2.8% |
| Exempt adviser | 10.2% | 1 | 0.0% |
| Bank | 31.5% | 3 | +48.2% |
| Non-US | 25.4% | 2 | 0.0% |
| Adviser | 0.0% | 0 | — |
| Insurer | 0.0% | 0 | — |
| Broker-dealer | 0.0% | 0 | — |
| Benefit plan | 0.0% | 0 | — |
| Unknown | 15.6% | 4 | +2.0% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Systematic-like | 14.4% | 3 | +1.5% |
| Concentrated | 13.4% | 2 | +0.7% |
| Diversified active | 72.2% | 11 | +15.6% |
| Index-like | 0.0% | 0 | — |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 5.1% | 2 | 0.0% |
| Medium turnover | 29.6% | 5 | +49.1% |
| High turnover | 60.1% | 8 | +0.4% |
| Unknown | 5.3% | 1 | +1.9% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 51.1% | 7 | +0.4% |
| Medium horizon | 12.2% | 2 | 0.0% |
| Long horizon | 32.5% | 5 | +46.1% |
| Unknown | 4.3% | 2 | -8.6% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 35.9% | 5 | -0.8% |
| $1B to $10B | 22.3% | 4 | 0.0% |
| $10B to $100B | 34.1% | 5 | +43.6% |
| $100B or more | 7.7% | 2 | 0.0% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Pooled investment vehicles | 14.3% | 4 | +0.8% |
| Registered funds and BDCs | 3.0% | 2 | -17.0% |
| Individuals and high net worth | 0.0% | 0 | — |
| Other investment advisers | 0.0% | 0 | — |
| Unknown | 82.6% | 10 | +14.6% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 13.3% | 3 | +0.9% |
| Other private funds | 2.0% | 2 | 0.0% |
| Private funds, type not stated | 10.2% | 1 | 0.0% |
| No private funds | 2.0% | 1 | -23.4% |
| Private equity funds | 0.0% | 0 | — |
| Unknown | 72.5% | 9 | +17.0% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 32.6% | 11 | -0.6% |
| Outside the US | 67.4% | 5 | +17.9% |
The Sep 30, 2026 filing window is still open, so its bar shows only the filers that have filed so far.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Conviction and Crowding
16 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 70.7% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies MBVIU's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | WENN WEN Acquisition Corp | 5 |
| 2 | GSHR Gesher Acquisition Corp. II | 3 |
| 3 | HCMA Hcm III Acquisition Corp. | 3 |
| 4 | XRPNU Armada Acquisition Corp. II | 4 |
| 5 | NPAC New Providence Acquisition Corp. III | 4 |
| 6 | BDCI BTC Development Corp. | 3 |
| 7 | EVOX Evolution Global Acquisition Corp | 3 |
| 8 | HACQ HCM IV Acquisition Corp. | 3 |
| 9 | KOYN CSLM Digital Asset Acquisition Corp III, Ltd | 3 |
| 10 | AACB Artius II Acquisition Inc. | 3 |
Shareholder Targets
13F filers that own its peers but not MBVIU, quarter ended Jun 30, 2026Found through its holder-overlap peers: WENN, GSHR, HCMA, XRPNU, NPAC, BDCI, EVOX, HACQ, KOYN, AACB, SVIV, ALDF, SZZL, IACO, TACO, TACH, PACH, YCY, DRDB, IPCX. 73 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Crossingbridge Advisors, LLC Adviser, Diversified active | $78,750,237 12 held | WENN, IPCX, DRDB |
| 2 | Arrington Capital Management, LLC Registered adviser, Concentrated | $60,394,320 1 held | XRPNU |
| 3 | GOLDMAN SACHS GROUP INC Holding company, Index-like | $47,125,535 11 held | ALDF, TACH, NPAC |
| 4 | RLH Capital LLC Unknown, Diversified active | $37,327,140 7 held | IPCX, XRPNU, TACH |
| 5 | Harraden Circle Investments, LLC Registered adviser, Diversified active | $31,934,501 2 held | ALDF, TACO |
| 6 | Karpus Management, Inc. Adviser, Diversified active | $28,650,933 11 held | PACH, WENN, KOYN |
| 7 | Saba Capital Management, L.P. Registered adviser, Diversified active | $26,671,878 4 held | HCMA, WENN, HACQ |
| 8 | Fort Baker Capital Management LP Registered adviser, Concentrated | $21,263,740 4 held | GSHR, SVIV, EVOX |
| 9 | MANGROVE PARTNERS IM, LLC Registered adviser, Diversified active | $20,175,457 5 held | SZZL, PACH, IACO |
| 10 | DLD Asset Management, LP Registered adviser, Diversified active | $20,143,692 15 held | TACO, WENN, HCMA |
Quarterly Activity
New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.
Top Buyers
vs Jun 30, 2026Top Sellers
vs Jun 30, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Small FNY Investment Advisers, LLC | −100 | 5,188 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Small FNY Investment Advisers, LLC MBVIU | — | — | 5,188 | Shares | 2026-10-16 | |
| Small SYQUANT CAPITAL SAS MBVIU | — | — | 200,000 | Shares | 2026-10-20 |