There is no single public owner of the Any Third concept; it is a widely taught portfolio rule used across the industry. The most direct way to capitalize is to implement a three-fund allocation using public ETFs: VTI for US stocks, VXUS for international stocks, and BND for US bonds. Indirect exposure can come from owning shares in large asset managers that sponsor these ETF lines, such as BlackRock (BLK) and State Street (STT), whose iShares and SPDR product families enable the 1/3-1/3-1/3 approach. Entrepreneurial opportunities exist in building tools or services that automate rebalancing to maintain a steady 1/3-1/3-1/3 allocation or in educational platforms that teach this framework to new investors.