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Houston RIA Launches Private Markets Fund

Reported by WealthManagement.com
Jan 7, 2026· 3 min read
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Key Takeaways
  • • Granite Harbor Capital, the private markets division of Houston-based RIA Granite Harbor Advisors ($600 million AUM), launched Mariner Fund I, a closed-end fund targeting private equity operating companies and commercial real estate.
  • • Mariner Fund I has a $50 million target and received almost $3 million in commitments within its first day, according to the firm's executives.
  • • The fund targets mid-teen IRR returns over a three- to five-year horizon, with a 10-year total fund life and a $250,000 minimum investment for qualified clients.
  • • Investments will focus primarily on the Midwest, including multifamily and industrial real estate and private equity operating companies in manufacturing, infrastructure support and logistics.
  • • The fund is open to Granite Harbor Advisors clients and outside qualified investors, but is not being broadly distributed through third-party platforms at this stage.
Summary
Granite Harbor Capital, a division of Granite Harbor Advisors, a Houston-based registered investment adviser with $600 million in assets under management, has launched Mariner Fund I, a closed-end fund focused on private equity operating companies and commercial real estate, according to Wealth Management. The launch follows the October announcement of Granite Harbor Capital as a private markets vertical designed to expand the firm's diversified private investments.

According to Brian W. Sak, managing partner at Granite Harbor, the move was driven by consistent client requests for greater private markets exposure and the firm's dissatisfaction with the high costs and limited platforms for accessing such investments through third parties. Sak said the firm's proprietary, off-market deal flow, built over more than 25 years of industry relationships, justified a dedicated opportunity fund.

Mariner Fund I's investments will be located primarily in the Midwest, including multifamily and industrial real estate and private equity operating companies in the manufacturing, infrastructure support and logistics sectors. Derek J. Taylor, managing partner at Granite Harbor Capital, said the fund targets mid-teen IRR returns within three to five years and has a total life of 10 years. He said the fund should benefit from the firm's longstanding Midwest relationships, allowing it to offer direct, co-GP or co-investment opportunities. The fund is open to Granite Harbor Advisors clients and outside investors meeting the qualified client threshold, with a $250,000 minimum investment.

Nicholas M. Brown, managing partner at the firm, said existing clients benefit from having private market allocations folded into their public market or other wealth management strategies, providing a single source for due diligence, capital call and cash flow management, and reporting.

The firm's executives said the fund received almost $3 million in commitments on its first day and expects to reach its $50 million target relatively quickly. Granite Harbor Capital has marketed the fund through direct outreach, targeted digital communications, educational webinars and in-person events in Houston and Milwaukee, where the firm operates. Sak said the fund is not being broadly distributed through third-party investment platforms, as the initial focus is on aligned capital rather than wide-scale distribution.

Atrivus Legal advised Granite Harbor on fund formation, while Baker Tilly provides fund accounting and Weaver provides fund formation services.

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Sources

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WealthManagement.com Houston RIA Launches Private Markets Fund