About Us | FortCay Family Office Advisory

FortCay Family Office Advisory was founded on the core principles of independence and transparency – allowing us to align completely with clients. As trusted advisors, we partner with clients through a goals-based approach that is not only collaborative but fiercely disciplined.


FortCay is committed to improving alignment in the traditional wealth management model. We recognize that accumulating wealth often invites complexity, and our mission is to simplify our clients’ lives.

Our open-architecture allows us to collaborate with existing trusted partners and advisors – creating a unified point of contact that comprehensively understands your entire life picture. We understand that managing wealth involves navigating multiple data sources, and have solved this by consolidating your assets into a single, user-friendly, platform accessible at any time.

We extend that commitment to our institutional investors as well. For institutions, our team brings years of expertise in collaborating with investment committees to improve governance by crafting mandates and constructing portfolios. We firmly believe that providing institutional clients with the opportunity to access non-traditional investment classes can optimize risk-return characteristics without compromising liquidity.


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Billy Harty

In 2023, Billy and three of the families he represents founded FortCay Family Office Advisory. Billy brings a wide range of experience and is a trusted adviser to help UHNW clients achieve their financial needs and objectives. He began his career as a US government bond broker on Wall Street. He has worked as a treasury dealer with a major German investment bank and as head of trading in a global fintech firm.

Prior to relocating to Cayman, he was a senior investment manager in Ireland’s oldest brokerage firm. In Cayman, he worked as an investment advisor at RBC Dominion Securities and worked at a London-headquartered multi-family office based in Cayman.

He holds a Bachelor of Commerce (Hons) from University College Cork, where he received a Gaelic football scholarship. He also completed a Graduate Diploma in Financial Planning from University College Dublin/Institute of Banking, held the Series 7, 24 and 63 FINRA licenses and is qualified as a CERTIFIED FINANCIAL PLANNER™ practitioner. Billy has completed Level 1 and Level 2 of the Chartered Financial Analyst (CFA) program. Billy proudly served as an officer in the Irish Army for six years.


We are a team of experienced professionals who recognized a unique opportunity to serve the offshore ultra-high-net-worth market.

Founded by industry veterans, successful operators, and clients our journey began with a shared vision rooted in five core values: independence, alignment, transparency, diversification, and privacy.

Our varied backgrounds, both in and out of the financial industry, equip us to not only navigate the intricacies of investment management but the broader context of your financial life.

We demonstrate belief in our approach by investing alongside our clients and they reciprocate their trust by investing in us. We measure our success by your success.

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