About TellSignal

TellSignal turns the firehose of public SEC Form 4 filings into a small list of clean, explainable insider transaction signals — ranked by an open, deterministic conviction score.

Most Form 4 filings are option exercises, tax withholdings, grants, gifts, or pre-planned 10b5-1 trades. They drown out the small number of filings that may actually represent insider conviction. We classify every transaction, isolate clean open-market purchases, and score them on cleanliness, role strength, clustering, commitment, timing novelty, and historical behaviour.

Every signal links back to the underlying EDGAR filing so you can verify the source yourself. No black box. No buy/sell recommendations.