SEC Insider Feed: Track U.S. public company insider trades in real time via API

Can you know instantly when a CEO starts frantically selling their own company’s stock? On May 20, 2026, we launched SEC Insider Feed — an API service that captures insider trading data for U.S. publicly listed companies in real time. 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—CEOs, CFOs, directors, and shareholders holding over 10% of 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 scattered across the SEC website in raw, unwieldy formats that are difficult to use directly. Insider transactions are widely regarded as one of the strongest market signals: ・ A CEO buying shares out-of-pocket → A far more reliable bullish signal than any analyst report. ・ Multiple executives selling simultaneously → A collective “rats leaving the sinking ship” warning. ・ 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? An API service that scrapes SEC Form 4 data at five-minute intervals, returning structured JSON. Core capabilities: ・🔄 Real-time capture — Polls SEC RSS feeds every 5 minutes; new filings are ingested within seconds. ・📊 Structured data — Includes company name, insider identity, transaction code, share quantity, dollar amount—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 — Supports MCP integration, 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. 2. Query insider trades for a specific stock. 3. Filter for insider purchases only (the strongest bullish signal). 4. Enable real-time push (SSE). Once connected, you’ll receive instant notifications whenever a new insider trade is disclosed for AAPL. Understanding dates: Three critical fields Each filing contains three distinct date fields, each with a different meaning: Field Meaning Example filed_date When the filing was submitted to the SEC 2026-05-21 period_of_report The effective date covered by the report 2026-05-19

Wall Street traders’ secret weapon: Uncovering market tops and bottoms from Form 4 filings!

Have you noticed that over the past several months, NVIDIA’s top two executives have successively cashed out massive stakes near market highs—with such frequency and timing that it’s alarming? And coinciding with their sell-offs, the AI chip sector—the darling of global investors over the past two years—has rapidly lost momentum. Whether U.S.-listed NVIDIA and Broadcom, or China’s A-share-listed Cambricon, all peaked roughly between September and October last year, then entered a six-month downtrend. You might ask: While insiders feast, retail investors get left holding the bag. Must ordinary investors always be late to the game—only realizing something was amiss after prices crash? Absolutely not! By understanding just one document, you too can gain a god’s-eye view. Today, we’ll unveil Wall Street traders’ essential skill: The secrets hidden in SEC Form 4 filings. There’s a famous saying in investing circles: “Don’t listen to what they say—watch what they do.” Sure, executives may dazzle with optimistic rhetoric during earnings calls—but their personal stock trades involve real money, and cannot be faked. Form 4 is the most authoritative insider trading disclosure mandated by the U.S. Securities and Exchange Commission (SEC). Any executive or major shareholder buying or selling their company’s stock must file it truthfully within two business days—recording the exact transaction date, number of shares, and price—fully transparent and publicly accessible! Note this crucial detail: Two business days! Compared to quarterly filings like Form 13F (which disclose institutional holdings), Form 4’s timeliness is nothing short of explosive. So what does this legendary Form 4 actually look like? On the SEC’s official website, it appears like this: 1️⃣ Look here (Name field): Who executed the trade? Is it the CEO—or the CFO? 2️⃣ Look here (Code field): “S” means they’re aggressively cashing out! “P” means they’re betting big on a bottom! 3️⃣ Finally, look here (Amount/Price fields): How many shares did they sell—and at what average price? Track just these three core elements, and the full picture emerges. But—here’s the catch: If you manually scour the SEC’s website daily, your eyes will go blind. That’s why Wall Street traders rely on processed, cleaned data—like this example. We’ve handpicked four truly classic, real-world cases—including: Two epic market tops, and two textbook-perfect bottoms. Next, we’ll walk through actual trades by Jensen Huang, Elon Musk, and Warren Buffett—revealing the terrifying predictive power of Form 4! First case: Let’s revisit NVIDIA’s recent activity. From last September to now, its two top executives have collectively sold $200 million worth of stock. Start with Jensen Huang’s moves—masterclass precision at the top: On September 25 and October 1, 2025—just six days apart—he sold 225,000 shares at prices ranging from $181.08 to $188.01, pocketing $40 million. Then, from October 1 to October 10, he sold another 600,000 shares at $184.23–$195.32, netting $113 million. In total, these two rounds brought in nearly RMB 1.08 billion—fast, forceful, and utterly decisive. Right after Huang wrapped up his October sell-off, NVIDIA’s CFO Colette Kress picked up the baton in November—selling continuously for nearly six months. Her most recent sale occurred on March 20, selling 471 shares at $177.51.

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