Rivergate Companies, LLC (Jay Massirman Family Office) is a family office - single based in Coconut Grove, FL, United States, founded in 2007. Verified contact details, AUM data, and investment preferences on FindLPs.
An investment platform founded by Jay Massirman focused on creating stable growth-oriented joint ventures to endure market cycles and create outsized returns.
FindLPs holds verified direct email addresses and phone numbers for decision-makers at Rivergate Companies, LLC (Jay Massirman Family Office). Contact details are masked on the free plan — start a plan to unlock full access and CSV export.
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LP firm data compiled from public regulatory filings (SEC Form ADV, FCA, AIFMD disclosures), company websites and press releases, LinkedIn public profiles, and verified outbound email testing. AUM figures reflect self-reported values from filings and may lag by 1–2 fiscal quarters; bands are normalized in USD. We do not publish personal residential information; firms or individuals may request removal at /contact. Methodology & sources · Updated July 2026.