InsiderPulse

About InsiderPulse

How it works, where the data comes from, and what the scores mean

What is InsiderPulse?

InsiderPulse is a data aggregator drawing from multiple credible sources such as the SEC, U.S. Congress financial disclosures, and other public databases. It started as a personal project and grew into a tool for the broader investing community. The site is supported by advertising and remains free to use — no account required for core features.

Data Sources

Company Insiders — SEC EDGAR Form 4

Corporate insider transactions are sourced from SEC EDGAR, the official public filing database of the U.S. Securities and Exchange Commission. Form 4 filings are public record and must be submitted by directors, officers, and 10%+ shareholders within two business days of a transaction. InsiderPulse fetches these filings every 15 minutes via the EDGAR RSS feed. Includes velocity leaderboard, sector heatmap, cluster signals, and congress overlap views.

Congress Trading — U.S. House & Senate

Congressional trading data is sourced from the U.S. House Financial Disclosures and the U.S. Senate eFD database, which publish Periodic Transaction Reports (PTRs) filed under the STOCK Act. Members are required to report securities transactions within 45 days. The Congress + Insider Overlap view surfaces tickers where both congressional members and corporate insiders are buying simultaneously.

Big Money — SEC EDGAR 13F Filings

Institutional holdings are sourced from SEC EDGAR 13F filings. Institutional investment managers with over $100 million in qualifying assets must file quarterly 13F reports disclosing their U.S. equity holdings. These filings are public record and are displayed as filed with the SEC.

Earnings Calendar — Nasdaq & Finnhub

Earnings calendar data is sourced from the Nasdaq earnings calendar and Finnhub. EPS estimates are not guaranteed to be accurate or complete.

Real-Time Quotes, IPO Calendar & Lockup Expirations — Finnhub

Real-time stock quotes and IPO data are sourced from Finnhub, a financial data provider covering major U.S. exchanges. Current price and daily percentage change are displayed on ticker detail pages via Finnhub's quote endpoint. Lockup expiration dates are calculated as IPO date + 180 days (the standard lockup period), indicating when early investors and insiders are first permitted to sell their shares.

Historical Price Charts — Stooq

Historical daily price data powering the price charts on ticker detail pages is sourced from Stooq, a free financial data provider with no API key required. Charts display end-of-day closing prices across selectable timeframes (1W, 1M, 3M, 6M, 1Y) and overlay insider buy and sell transaction dates as colored dots.

Treasury Yields — U.S. Department of the Treasury

US Treasury yield curve data is sourced directly from the U.S. Department of the Treasury via their public OData XML feed. Covers maturities from 1-month to 30-year. The 10Y–2Y spread is shown as a recession indicator.

Finance Glossary — InsiderPulse

All definitions in the Finance Glossary are written and maintained by InsiderPulse. They are not sourced from a third-party provider. Definitions are intended to be plain-English educational summaries and do not constitute financial advice.

How is velocity calculated?

The insider velocity score compares recent buying (last 30 days) to a historical baseline (90–365 days ago), weighted by the number of unique insiders buying:

velocity = (recent_rate / baseline_rate) × log(1 + unique_insiders)
  • 10x score — new buying with no prior baseline (high conviction signal)
  • High score — insiders buying much faster than their own historical rate
  • Sell score — same algorithm applied to open-market sales
  • Multiple insiders — breadth bonus applied via logarithm

Transaction codes

POpen-market purchase — insider bought shares with their own money
SOpen-market sale — insider sold shares on the open market

Recent Updates

04-28-26API consolidation — Alpha Vantage, FMP, and Twelve Data removed; price charts now use Stooq, house sync uses disclosures.house.gov directly
04-28-26Party enrichment fixed — now sourced from Congress.gov API (same as photos) for more reliable R/D/I coverage
04-28-26Congress member committee assignments shown on profile pages; "No committee assignments on record" shown when none found
04-28-26Sector heatmap: industry names decolorized to white; Top Seller column added; velocity shows sell score when sector is net-selling
04-28-26Congress member names colored by party — red for Republican, blue for Democrat in the trades table
04-28-26Ticker color follows transaction type — green for purchases, red for sales in the congress trades table
04-28-26Duplicate house trades fixed — expression index deduplicates Quiver data regardless of null tickers
04-28-26Chamber filter added to congress trades — filter to Senate only, House only, or both
04-28-26Member profiles enriched — state, years in office, and district pulled from Congress.gov API
04-28-26House representatives added — U.S. House member profiles, trades, and leaderboard now included alongside Senate data
04-28-26Congress member profiles show company names — Most Purchased and Most Sold sections now display company name instead of ticker symbol
04-28-26Congress member profile photos — official portraits shown on senator profile pages and the member leaderboard
04-28-26Ticker page enrichment — sector, industry, and market cap badges added to company detail pages
04-28-26Ticker page SEO — canonical URLs, Open Graph tags, Twitter cards, and JSON-LD structured data added
04-28-26Company name tooltips — hover any truncated company name sitewide to reveal the full name
04-28-26Senate duplicate fix — deduplicated senator transactions; expression index prevents future duplicates regardless of null ticker
04-28-26Congress trades now show asset description when no ticker is available, instead of a blank column
04-02-26Weekly Buys expanded to Weekly Trades — top purchases and top sales now shown side by side
04-02-26Account tab consolidated — watchlist and email alerts now managed from a single Account page
04-02-26Velocity sparklines — 14-day score trend added to the insider leaderboard
04-02-26Congress member trade performance — +30d and +90d stock returns shown per trade on member profiles
04-02-26Company descriptions — Alpha Vantage enrichment added to ticker detail pages
04-02-26Magic-link account system — save watchlist and email preferences with no password
04-02-26Watchlist email alerts — daily digest when insider or congress activity hits your saved tickers
04-02-26Email alerts rebuilt — daily and weekly digests with fully customizable velocity tier, countries, impact, and thresholds

Disclaimer

InsiderPulse is for informational purposes only and does not constitute financial, investment, legal, or tax advice. All data is sourced from public third-party databases and is provided as-is without warranty of accuracy or completeness. Insider activity, congressional trades, institutional holdings, and IPO data are one of many factors to consider when evaluating a security. Always conduct your own research and consult a qualified financial advisor before making investment decisions.