Platform workers are innovating beyond strikes and lawsuits by wielding capital-market pressure, yet the determinants of success remain unclear. This paper extends power-resources theory to treat investor leverage as a fifth, relational resource and analyses 32 labor-investor campaigns across five continents (1980-2025). Using documentary evidence and qualitative comparative analysis, it distils a fourfold typology—proxy fights, ESG coalitions, divestment threats and direct-equity demands—and shows that campaigns prevail when they strike before IPOs, present independent risk evidence and assemble broad worker-expert-investor coalitions. India’s trajectory from street protests to the Gig and Platform Servic e Workers’ Uni on’s “Worke r K a IPO” bid illustrates these dynamics in an emerging-market context where disclosure reforms substitute partly for pension-fund stewardship.