M3-Brigade Acquisition VI Corp.
MBVIU- Exchange
- Nasdaq
- Industry
- Blank Checks
- SEC CIK
- 0002073928
No open-market purchases or sales by M3-Brigade Acquisition VI Corp. insiders were filed in the last 90 days; 16 institutions reported holding it in 13F filings for Q2 2026, worth $25.2M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in M3-Brigade Acquisition VI Corp. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 26
- −50 vs. Q3 2025
- Shares held
- 4.36M
- −26.5M (−85.8%) vs. Q3 2025
- Total value
- $44.1M
- −$267.7M (−85.9%) vs. Q3 2025
- New holders
- 1
- 4 more added
- Sold out
- 51
- 7 more reduced
1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MBVIU on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 16 | $25.2M |
| Q1 2026 | 16 | $22.5M |
| Q4 2025 | 26 | $44.1M |
| Q3 2025 | 77 | $312.3M |
| Q2 2025 | 0 | $0 |
| Q1 2025 | 0 | $0 |
| Q4 2024 | 0 | $0 |
| Q3 2024 | 0 | $0 |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding M3-Brigade Acquisition VI Corp.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Magnetar Financial LLC | 1,100,000 | $11.1M | 0.11% | 00.0% | Unchanged |
| HGC Investment Management Inc. | 625,000 | $6.33M | 1.34% | −225,000−26.5% | Reduced |
| Steadfast Capital Management LP | 400,000 | $4.05M | 0.07% | 00.0% | Unchanged |
| Rivernorth Capital Management, LLC | 399,512 | $4.05M | 0.19% | −488−0.1% | Reduced |
| Toronto Dominion Bank | 281,400 | $2.85M | 0.01% | +10,560+3.9% | Added |
| LMR Partners LLP | 250,000 | $2.53M | 0.02% | 00.0% | Unchanged |
| Readystate Asset Management LP | 225,000 | $2.27M | 0.10% | +25,000+12.5% | Added |
| Syquant Capital SAS | 200,000 | $2.02M | 0.25% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 150,000 | $1.51M | 0.00% | +150,000 | New |
| Schonfeld Strategic Advisors LLC | 100,000 | $1.01M | 0.01% | −10,000−9.1% | Reduced |
| Citigroup Inc | 100,000 | $1.01M | 0.00% | 00.0% | Unchanged |
| Walleye Capital LLC | 100,000 | $1.01M | 0.01% | 00.0% | Unchanged |
| Clear Street Group Inc. | 83,199 | $842.4K | 0.00% | −286,759−77.5% | Reduced |
| Omni Event Management Ltd | 76,978 | $779.4K | 0.06% | +1,002+1.3% | Added |
| Sandia Investment Management LP | 50,000 | $506.3K | 1.26% | 00.0% | Unchanged |
| Quarry LP | 50,000 | $506.3K | 0.08% | 00.0% | Unchanged |
| Westchester Capital Management, LLC | 50,000 | $505.0K | 0.02% | 00.0% | Unchanged |
| Sona Asset Management (US) LLC | 25,000 | $253.1K | 0.01% | 00.0% | Unchanged |
| Calamos Advisors LLC | 24,606 | $248.5K | 0.00% | 00.0% | Unchanged |
| Tuttle Tactical Management | 20,000 | $202.5K | 0.45% | 00.0% | Unchanged |
| Bulldog Investors, LLP | 15,240 | $154.3K | 0.03% | −100,000−86.8% | Reduced |
| Citadel Advisors LLC | 10,645 | $107.5K | 0.00% | −184−1.7% | Reduced |
| PenderFund Capital Management Ltd. | 10,387 | $104.9K | 0.02% | 00.0% | Unchanged |
| Timelo Investment Management Inc. | 10,000 | $101.3K | 0.11% | 00.0% | Unchanged |
| FNY Investment Advisers, LLC | 5,408 | $54.0K | 0.02% | +108+2.0% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 2 | $20 | 0.00% | −1,099,998−100.0% | Reduced |
| Highbridge Capital Management LLC | 0 | $0 | 0.00% | −1,470,000−100.0% | Sold out |
| Alberta Investment Management Corp | 0 | $0 | 0.00% | −1,450,000−100.0% | Sold out |
| Glazer Capital, LLC | 0 | $0 | 0.00% | −1,329,906−100.0% | Sold out |
| PEAK6 LLC | 0 | $0 | 0.00% | −1,250,000−100.0% | Sold out |
| CNH Partners LLC | 0 | $0 | 0.00% | −1,141,831−100.0% | Sold out |
| Picton Mahoney Asset Management | 0 | $0 | 0.00% | −1,100,000−100.0% | Sold out |
| Linden Advisors LP | 0 | $0 | 0.00% | −1,100,000−100.0% | Sold out |
| MMCAP International Inc. SPC | 0 | $0 | 0.00% | −1,100,000−100.0% | Sold out |
| Tenor Capital Management Co., L.P. | 0 | $0 | 0.00% | −1,100,000−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −1,100,000−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −1,005,208−100.0% | Sold out |
| Adage Capital Partners GP, L.L.C. | 0 | $0 | 0.00% | −1,000,000−100.0% | Sold out |
| Context Capital Management, LLC | 0 | $0 | 0.00% | −880,000−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −812,384−100.0% | Sold out |
| Shaolin Capital Management LLC | 0 | $0 | 0.00% | −650,000−100.0% | Sold out |
| Omers Administration Corp | 0 | $0 | 0.00% | −600,000−100.0% | Sold out |
| Radcliffe Capital Management, L.P. | 0 | $0 | 0.00% | −575,000−100.0% | Sold out |
| Wealthspring Capital LLC | 0 | $0 | 0.00% | −560,962−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −550,000−100.0% | Sold out |
| Meteora Capital, LLC | 0 | $0 | 0.00% | −500,237−100.0% | Sold out |
| Mint Tower Capital Management B.V. | 0 | $0 | 0.00% | −500,000−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −475,000−100.0% | Sold out |
| Vivaldi Asset Management, LLC | 0 | $0 | 0.00% | −400,000−100.0% | Sold out |
| Periscope Capital Inc. | 0 | $0 | 0.00% | −393,300−100.0% | Sold out |
| BNP Paribas Arbitrage, SA | 0 | $0 | 0.00% | −358,169−100.0% | Sold out |
| Aristeia Capital LLC | 0 | $0 | 0.00% | −350,000−100.0% | Sold out |
| Wolverine Asset Management LLC | 0 | $0 | 0.00% | −330,000−100.0% | Sold out |
| Gabelli & Co Investment Advisers, Inc. | 0 | $0 | 0.00% | −269,400−100.0% | Sold out |
| Mizuho Securities USA LLC | 0 | $0 | 0.00% | −257,725−100.0% | Sold out |
| Davidson Kempner Capital Management LP | 0 | $0 | 0.00% | −250,000−100.0% | Sold out |
| Saba Capital Management, L.P. | 0 | $0 | 0.00% | −247,577−100.0% | Sold out |
| Berkley W R Corp | 0 | $0 | 0.00% | −242,245−100.0% | Sold out |
| Gabelli Funds LLC | 0 | $0 | 0.00% | −230,600−100.0% | Sold out |
| Moore Capital Management, LP | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| StoneX Group Inc. | 0 | $0 | 0.00% | −182,051−100.0% | Sold out |
| Whitebox Advisors LLC | 0 | $0 | 0.00% | −150,000−100.0% | Sold out |
| Cantor Fitzgerald, L. P. | 0 | $0 | 0.00% | −116,500−100.0% | Sold out |
| TIG Advisors, LLC | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| K2 Principal Fund, L.P. | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Parallax Volatility Advisers, L.P. | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Cable Car Capital LLC | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Ghisallo Capital Management LLC | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Governors Lane LP | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Deltec Asset Management LLC | 0 | $0 | 0.00% | −25,000−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −24,999−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −12,095−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| TrueMark Investments, LLC | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Royal Bank of Canada | 0 | $0 | 0.00% | −8,653−100.0% | Sold out |
| UBS Group AG | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Atw Spac Management LLC | – | – | – | – | Not filed |