SEC Insider Feed: Track insider trading of U.S. publicly listed companies via real-time API

Can you know—immediately—when CEOs start aggressively selling their own company’s stock? On May 20, 2026, we launched SEC Insider Feed—a real-time API service that captures insider trading data for U.S. publicly listed companies. This article explains what this API is, what it can do, and key insights we uncovered using real-world data. What is insider trading data—and why does it matter? U.S. securities law requires corporate insiders—including CEOs, CFOs, directors, and shareholders holding more than 10% of outstanding shares—to file Form 4 with the SEC within two business days after buying or selling their company’s stock. These filings are public, but they’re scattered across the SEC’s website in raw, unwieldy formats that are difficult to use directly. Insider trading activity is widely regarded as one of the strongest market signals available: ・ A CEO buying shares out-of-pocket → A bullish signal more reliable than any analyst report ・ Multiple executives selling simultaneously → A collective “rats leaving the sinking ship” signal ・ Heavy减持 by hedge funds → An early indicator of shifting institutional confidence The problem? These data reside in the SEC’s EDGAR system—disorganized, fragmented, and severely delayed. If you want to know who sold today, you might have to scroll through dozens of web pages. SEC Insider Feed solves exactly this problem. What is SEC Insider Feed? A real-time API service that scrapes SEC Form 4 filings at five-minute intervals, returning clean, structured JSON. Core capabilities: ・ 🔄 Real-time capture — Polls SEC’s RSS feed every 5 minutes; new filings are ingested and stored within seconds ・ 📊 Structured data — Includes company name, insider identity, transaction code, number of shares, dollar value—ready to use out of the box ・ 🔍 Flexible querying — Filter by ticker symbol, insider name, transaction type, or date range ・ 📡 Real-time push — Server-Sent Events (SSE) streaming interface delivers new filings instantly to your application ・ 🤖 AI-ready — Integrates with MCP, enabling natural-language queries Tech stack: Python 3.12 / FastAPI / SQLAlchemy 2.0 async / PostgreSQL 15 / Deployed on Railway API endpoint: https://sec-insider-api.up.railway.app Quick start 1. Retrieve the latest insider trades curl -H "X-API-Key: YOUR_API_KEY" \ 'https://sec-insider-api.up.railway.app/v1/filings?per_page=5' 2. Query insider trades for a specific stock curl -H "X-API-Key: YOUR_API_KEY" \ 'https://sec-insider-api.up.railway.app/v1/tickers/NVDA'

Warning for next year’s performance? U.S. insiders’ stock sales hit a record high for a single quarter in twenty years

Recent surging insider selling among U.S.-listed companies has drawn growing concern from financial media. According to a recent Financial Times report, a record number of U.S. corporate executives are selling shares of their own companies—from Goldman Sachs and Tesla to even the media group owned by President-elect Donald Trump—capitalizing on the post-election U.S. equity rally. Data from VerityData shows that insider selling activity among U.S. publicly listed companies has reached its highest quarterly rate in twenty years. This metric covers sell transactions executed by executives of constituent firms in the Wilshire 5000—the broadest U.S. equity index by market-cap weighting and one of the most comprehensive indices covering actively traded U.S. stocks. It includes both one-off profit-taking trades and scheduled sales triggered when share prices reach pre-set thresholds under executives’ automated trading plans. Moreover, in Q4 of this year, the ratio of insider sellers to buyers among S&P 500 component companies stood at 23.7:1—the highest level since 2004, when the U.S. first mandated public disclosure of insider trading activity. large_image?... There are many reasons why corporate insiders sell stock—and many of them have nothing to do with the company’s underlying prospects. Therefore, record-high insider selling does not necessarily signal imminent danger. However, given recent strong returns, elevated valuations, rising leverage, and an overall highly speculative market environment, this wave of insider selling sends another cautionary signal for U.S. equities as a whole—suggesting that the market’s performance next year may fall short of expectations. On the link between insider trading and market performance, Ben Silverman, Research Director at VerityData, commented: “In general, insider selling has predictive power—typically foreshadowing market turns by roughly two to three quarters.”

REX American Resources (NYSE:REX) Insider Sells 50,000 Shares of Stock

Oct 1, 2026

REX American Resources insider Stuart Rose sold 50,000 shares worth over $2.1 million, retaining a $96.9 million stake as shares fell 1.6% amid mixed quarterly earnings.

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