Familio is a non-custodial shared-trading product on Robinhood Chain. A family is one on-chain vault: a head (and optional co-pilots) trades through allow-listed routers, and every member owns a pro-rata slice of the same bags at the same fill price. Members deposit ETH or quote, join the current mix via mirror-entry, and can leave at any time with an in-kind slice of every bag plus free quote. The head cannot withdraw member funds or block exits. The live app is familio.trade. Related tools include a Telegram bot for trade posts, public family pages and cards, a leaderboard/feed, and fair-exit pools for coordinated single-token sells. Contracts are source-verified; there is no third-party audit yet. Familio is not a custodian, broker, or investment product — families trade tokens, and tokens can go to zero.