Who owns M3-Brigade Acquisition VI Corp. Class A Ordinary Shares (MBVI)
Which tracked institutional funds hold MBVI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MBVI company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-17). 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
11 tracked funds added or opened MBVI while 11 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
MBVI’s largest tracked holder by dollar value, HIGHBRIDGE CAPITAL MANAGEMENT LLC, sizes it at 0.8% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MBVI 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 62 tracked filers holding MBVI, 14 increased or opened the position and 19 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 MBVI 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
- MIZUHO SECURITIES USA LLC$2M
- CSS LLC/IL$1M
- Arax Advisory Partners$1M
Full exits 7
- METEORA CAPITAL, LLC$13M
- TENOR CAPITAL MANAGEMENT Co., L.P.$11M
- HighTower Advisors, LLC$11M
- GLAZER CAPITAL, LLC$11M
- Mint Tower Capital Management B.V.$5M
- K2 PRINCIPAL FUND, L.P.$1M
Largest adds
- Schonfeld Strategic Advisors LLC$1M
- WOLVERINE ASSET MANAGEMENT LLC$1M
- D. E. Shaw & Co., Inc.$724K
- HIGHBRIDGE CAPITAL MANAGEMENT LLC$686K
- PenderFund Capital Management Ltd.$388K
- Radcliffe Capital Management, L.P.$351K
Largest trims
- JPMORGAN CHASE & CO$15M
- TORONTO DOMINION BANK$498K
- Shaolin Capital Management LLC$474K
- Wealthspring Capital LLC$277K
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 |
|---|---|---|---|---|
| HIGHBRIDGE CAPITAL MANAGEMENT LLC added | 1,526,796 | $15M | 5.0% | 2026-Q2 |
| Alberta Investment Management Corp | 1,450,000 | $15M | 4.7% | 2026-Q2 |
| PEAK6 LLC | 1,250,000 | $13M | 4.1% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT added | 1,116,998 | $11M | 3.6% | 2026-Q2 |
| AQR Arbitrage LLC added | 1,108,776 | $11M | 3.6% | 2026-Q2 |
| Polar Asset Management Partners Inc. | 1,100,000 | $11M | 3.6% | 2026-Q2 |
| Linden Advisors LP | 1,100,000 | $11M | 3.6% | 2026-Q2 |
| MMCAP International Inc. SPC | 1,100,000 | $11M | 3.6% | 2026-Q2 |
| Magnetar Financial LLC | 1,099,995 | $11M | 3.6% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1,000,000 | $10M | 3.3% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP | 994,317 | $10M | 3.2% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 849,998 | $9M | 2.8% | 2026-Q2 |
| Verition Fund Management LLC | 842,415 | $9M | 2.7% | 2026-Q2 |
| Context Capital Management, LLC | 791,300 | $8M | 2.6% | 2026-Q2 |
| Radcliffe Capital Management, L.P. added | 668,807 | $7M | 2.2% | 2026-Q2 |
| WOLVERINE ASSET MANAGEMENT LLC added | 631,553 | $6M | 2.1% | 2026-Q2 |
| OMERS ADMINISTRATION Corp | 600,000 | $6M | 2.0% | 2026-Q2 |
| Hudson Bay Capital Management LP | 600,000 | $6M | 2.0% | 2026-Q2 |
| Wealthspring Capital LLC trimmed | 517,108 | $5M | 1.7% | 2026-Q2 |
| Shaolin Capital Management LLC trimmed | 424,411 | $4M | 1.4% | 2026-Q2 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC trimmed | 399,121 | $4M | 1.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 401,475 | $4M | 1.3% | 2026-Q2 |
| First Trust Capital Management L.P. | 399,701 | $4M | 1.3% | 2026-Q2 |
| Periscope Capital Inc. | 375,000 | $4M | 1.2% | 2026-Q2 |
| SONA ASSET MANAGEMENT (US) LLC | 363,069 | $4M | 1.2% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. | 350,000 | $4M | 1.1% | 2026-Q2 |
| BlueCrest Capital Management Ltd | 337,000 | $3M | 1.1% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 300,000 | $3M | 1.0% | 2026-Q2 |
| GABELLI & Co INVESTMENT ADVISERS, INC. | 269,400 | $3M | 0.9% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 254,425 | $3M | 0.8% | 2026-Q2 |
| Davidson Kempner Capital Management LP | 250,000 | $3M | 0.8% | 2026-Q2 |
| O'Connor Alternative Investments LLC | 250,000 | $3M | 0.8% | 2026-Q2 |
| BERKLEY W R CORP | 242,244 | $2M | 0.8% | 2026-Q2 |
| MIZUHO SECURITIES USA LLC added | 230,925 | $2M | 0.7% | 2026-Q2 |
| GABELLI FUNDS LLC trimmed | 205,600 | $2M | 0.7% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 204,993 | $2M | 0.7% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP | 200,000 | $2M | 0.7% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC | 182,950 | $2M | 0.6% | 2026-Q2 |
| Lineage Point Capital LP | 171,000 | $2M | 0.6% | 2026-Q2 |
| WHITEBOX ADVISORS LLC | 150,000 | $2M | 0.5% | 2026-Q2 |
| CSS LLC/IL new | 120,000 | $1M | 0.4% | 2026-Q2 |
| Bulldog Investors, LLP added | 115,237 | $1M | 0.4% | 2026-Q2 |
| Arax Advisory Partners new | 111,000 | $1M | 0.4% | 2026-Q2 |
| Ghisallo Capital Management LLC | 100,000 | $1M | 0.3% | 2026-Q2 |
| TIG Advisors, LLC | 100,000 | $1M | 0.3% | 2026-Q2 |
| Parallax Volatility Advisers, L.P. added | 89,781 | $909K | 0.3% | 2026-Q2 |
| Kryger Capital LLC trimmed | 77,393 | $784K | 0.3% | 2026-Q2 |
| Clear Street Group Inc. trimmed | 60,000 | $608K | 0.2% | 2026-Q2 |
| Governors Lane LP | 50,000 | $506K | 0.2% | 2026-Q2 |
| PenderFund Capital Management Ltd. added | 48,564 | $492K | 0.2% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC | 46,201 | $468K | 0.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 44,532 | $451K | 0.1% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 41,800 | $423K | 0.1% | 2026-Q2 |
| ABC ARBITRAGE SA | 25,000 | $253K | 0.1% | 2026-Q2 |
| DELTEC ASSET MANAGEMENT LLC | 25,000 | $253K | 0.1% | 2026-Q2 |
| Centiva Capital, LP | 24,999 | $253K | 0.1% | 2026-Q2 |
| Evercore Wealth Management, LLC | 15,999 | $162K | 0.1% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD | 10,000 | $101K | 0.0% | 2026-Q2 |
| Timelo Investment Management Inc. | 10,000 | $101K | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 9,842 | $100K | 0.0% | 2026-Q2 |
| UBS Group AG trimmed | 2,863 | $29K | 0.0% | 2026-Q2 |
| MORGAN STANLEY trimmed | 26 | $263 | 0.0% | 2026-Q2 |
| METEORA CAPITAL, LLC added | 1,253,752 | $13M | 4.0% | 2026-Q1 stale (1 quarter behind) |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 1,100,000 | $11M | 3.5% | 2026-Q1 stale (1 quarter behind) |
| HighTower Advisors, LLC trimmed | 1,082,900 | $11M | 3.5% | 2026-Q1 stale (1 quarter behind) |
| GLAZER CAPITAL, LLC trimmed | 1,073,671 | $11M | 3.5% | 2026-Q1 stale (1 quarter behind) |
| Mint Tower Capital Management B.V. | 500,000 | $5M | 1.6% | 2026-Q1 stale (1 quarter behind) |
| K2 PRINCIPAL FUND, L.P. | 100,000 | $1M | 0.3% | 2026-Q1 stale (1 quarter behind) |
| Virtu Financial LLC trimmed | 51,164 | $515K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| StoneX Group Inc. new | 42,600 | $428K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Kepos Capital LP new | 23,598 | $237K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Cable Car Capital, LP new | 100,002 | $1M | 0.3% | 2025-Q4 stale (2 quarters behind) |
| CITADEL ADVISORS LLC new | 10,953 | $110K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| ROYAL BANK OF CANADA new | 5,500 | $55K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| FNY Investment Advisers, LLC new | 500 | $5K | 0.0% | 2025-Q4 stale (2 quarters behind) |
1 parent filing withheld from the table above, and from the coverage figures, to avoid listing one book twice: OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) (last filed 2025-Q4, 250,000 shares) reconciles to its 1 current affiliate (250,000 shares) — 0.000% apart.
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.