S3 Partners

About S3 Partners

S3 Partners created and defined Positioning — the seventh category of the modern financial data stack. We give institutional investors the intelligence to deploy capital confidently, understand market crowding, and know an investment's true capacity. We invented daily Short Interest, Long Interest, Crowding, Squeeze Score, Battleground Stocks, and Cohort Behavior — and built the Plaid-like translation layer that unifies capital markets data into AI-resilient infrastructure. The result is a complete view of long and short positioning across 65,000+ global securities, paired with analytics that surface crowding, liquidity, and financing. We are the only provider of true daily global short interest — sourced from aggregated buy-side positions, sell-side securities lending data, exchange-reported short interest, and global regulatory filings, not a single noisy proxy. Our workflow platforms turn that data into speed and intelligence across ops, finance, risk, and trading. Trusted by 500+ financial firms across the buy side and sell side, with $200T+ in assets under intelligence. What we deliver: - True daily global short interest — not a securities lending proxy - Predictive Long Interest, 45 days ahead of 13F filings - Cohort intelligence across 2,500+ hedge fund managers and 11 proprietary cohorts - Float-adjusted exposure, crowding, squeeze risk, and financing costs - Workflow platforms — Blacklight, Blackwire, Blackline, and Locates → Email us at S3.Sales@S3partners.com to request a demo and see where the crowd is, what it costs, and what the risk really is.