Seabury Capital Management closed the first tranche of MBV Investments LP at $3.0 billion in initial commitments, with the Al Mazroui Group writing $2.5 billion as anchor. The commitment represents 83% of the fund's opening capital and marks one of the largest single-family commitments to a US venture vehicle in the past eighteen months.
The fund targets late-stage growth equity and structured venture positions across enterprise software, infrastructure, and climate technology. Seabury has not disclosed the final target size or whether the vehicle will accept additional limited partners beyond the current five committed allocators. The firm declined to name the remaining $500 million in commitments. Al Mazroui Group, a Dubai-based conglomerate with holdings in construction, energy services, and logistics, has no prior public venture fund commitments at this scale.
The timing matters. Venture funds raised $67.8 billion globally in the first half of 2025, down 34% year-over-year, according to Pitchbook. Funds closing above $1 billion represented just 11% of all closes, compared to 19% in 2023. Family offices and sovereign wealth vehicles have replaced institutional allocators as the marginal buyer in large venture funds, particularly those offering structured or secondary exposure without primary mark-to-market risk. Seabury's strategy appears to lean into this shift. The firm has completed three secondary purchases in the past nine months, including a $180 million block of shares in an unnamed cybersecurity company from early employees and a seed fund.
Middle East capital has moved from co-investment rights to anchor positions in under two years. Abu Dhabi's Mubadala and Saudi Arabia's PIF have committed $14.3 billion to US venture and growth equity funds since January 2024. Family groups have followed. The Al Mazroui commitment suggests appetite for venture exposure without the governance burden of direct stakes or the liquidity drag of primary funds. Seabury offers a hybrid model: the fund can buy secondaries, provide structured capital to companies, and selectively participate in primary rounds. That structure lets the anchor avoid J-curve drag while maintaining upside.
Allocators should watch for two follow-on events. First, whether Seabury reopens the fund for additional commitments or holds at $3.0 billion and launches a second vehicle within twelve months. Second, the firm's deployment pace. If the fund completes more than six positions before year-end, it signals confidence that structured and secondary deal flow remains liquid despite tightening exit markets. The Federal Reserve's next rate decision in three weeks will clarify whether late-stage private valuations compress further or stabilize.
The Al Mazroui commitment is the fact. A single family writes $2.5 billion into a fund with no prior relationship, no disclosed track record, and no named portfolio companies. That is not optimism. That is a view on liquidity, structure, and who controls the secondary market in eighteen months.