About NexusPlexus

NexusPlexus cross-references two public data sources that rarely meet: SEC Form 4 filings — the disclosures corporate insiders must file within two business days of trading their own company's stock — and Polymarket prediction markets about those companies' events.

When insiders put real money to work in one direction while the prediction market leans the other way, that divergence is worth a closer look. We surface it, link every number to its source filing, and let you judge.

This is a data-journalism project. It reports public filings factually, implies no wrongdoing by anyone named, and offers no investment advice.

Leave your email and we'll send the week's top insider-vs-market divergences when the digest launches. Nothing else, no sharing.

Notify me

Data updates once daily. Form 4 filings are ingested from SEC EDGAR; market probabilities snapshot from Polymarket's public APIs. Open-market purchases and sales (transaction codes P and S) drive the analysis; grants, option exercises, gifts, tax withholding, derivative-table rows, and Rule 10b5-1 plan trades are recorded but excluded from scoring. A full methodology page is coming with the Trending release.