Insider Trading Analysis — AI Semiconductor Industry Chain Track SEC Form 4 insider trading filings from 53 core AI semiconductor companies. Data is sourced from the SEC’s EDGAR database and refreshed every 5 minutes—so you’re among the first to know what insiders are buying or selling. What can this tool do for you? Form 4 filings are mandatory public documents that U.S. company executives, directors, and shareholders holding over 10% of shares must submit within two business days after executing a trade. By systematically tracking these filings, you gain insight into insiders’ genuine sentiment toward their own stock—are they putting real money on the line to buy, or aggressively selling off their holdings? Page Navigation Overview Get an at-a-glance view of capital flows across the entire industry chain. Key metric cards display number of transactions, total buy/sell amounts, net sell amount, and sell-pressure ratio. Below, the real-time Filing Feed is the most practical feature: it aggregates every insider transaction from the past three days by company (collapsed by default to show only company-level summary data—e.g., net sell amount). Click to expand and see full transaction details: who sold, their title, execution price, and transaction value. Group Overview Six groupings for side-by-side comparison: Core Semiconductors (e.g., NVDA, AMD, ARM—30 companies), Optical Interconnect (e.g., ANET, ALAB—12 companies), Memory (e.g., MU), Data Center Infrastructure (e.g., PLTR, CLS—13 companies), M7 Tech Giants, and the full AI Semiconductor universe. Each group card displays buy/sell amounts, net amount, sell-pressure ratio, number of insiders trading, and median share reduction. Click through to view complete group-level details. Comparison All groups appear in a single table for direct comparison of sell pressure, median sell size, P90 large-scale trades, and magnitude of shareholding reductions. At the bottom, a sell-pressure heatmap and comparative reduction-distribution chart help you quickly identify which sector’s insiders are most actively offloading shares.

Understanding SEC Form 4

In the 'Action' column, you’ll notice entries beyond the previously identified transaction types—such as AS (Automatic Sale) or S (Sale)—including many codes not shown on the prior website. What do these mean? Scroll further down the page to find the website’s 'Action Code' explanation: B and S are straightforward: standard Buy and Sell actions. But what distinguishes AB (Automatic Buy) and AS (Automatic Sale) from ordinary B and S? And what does D ('Disposed'), which appears frequently on the second site but not the first, signify? Moreover, what do GD and GA—codes absent from the Action Code explanation—mean? To answer these questions, we must refer to the original source document filed by insiders: Form 4 itself. Take Jensen Huang, CEO of NVIDIA—renowned for his sharp strategic acumen—as an example. Click the 'Form' button at the end of any transaction record (or go directly to the SEC’s official website and search for NVDA to access submitted Form 4s). First, let’s examine a typical Form 4: The green-highlighted sections in the form are self-explanatory: basic personal information such as name and title. Our main focus lies in Table I (Figure 1) and Table II (Figure 2) below: Table I records non-derivative securities (e.g., common stock), while Table II covers derivative securities (e.g., options or other derivatives). Let’s walk through the numbered fields in the figure: 1: Security Type — e.g., 'common stock' (most common), 'preferred stock', etc. Most cases involve common stock. 2: Transaction Date 3: Transaction Code — This is the most critical field. Beyond standard P (Purchase) and S (Sale) (note: the form requires 'Purchase', not 'Buy'), numerous other codes exist. For instance, code F indicates delivery or withholding of shares to satisfy tax obligations arising from the receipt, exercise, or grant of securities. Sounds complicated? Put simply: Jensen Huang previously received shares—perhaps via equity incentives or other means—and under U.S. law, such grants trigger tax liabilities. He elected to sell a portion of those newly granted shares to cover the associated taxes. Much clearer now, right? Besides F, there are many other transaction codes—comprehensive definitions for all are compiled and provided later. 4: Number of Shares — The quantity of shares involved in this transaction. 5: Acquired or Disposed — This is the second key field. Regardless of the specific transaction code used, every transaction ultimately results in either an increase or decrease in the filer’s shareholding: 'Acquired' means the filer’s share count increased post-transaction; 'Disposed' means it decreased. If you encounter an unfamiliar transaction code and don’t feel like looking it up, just check whether this field reads 'A' (Acquired) or 'D' (Disposed)—it instantly reveals the transaction’s directional impact.

PPG Industries Director Files Form 4 for Stock Transactions

Oct 24, 2026

PPG Industries reported a Form 4 filing detailing stock transactions by Director Timothy M. Knavish for the period ending September 30. The filing records changes in ownership of company stock by an insider.

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PPG Industries SVP Adds Phantom Stock Units in Deferred Plan

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PPG Industries Chairman and CEO Files Form 4 Transaction Report