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, polled in real time every five 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 public documents mandated by the U.S. Securities and Exchange Commission (SEC), requiring corporate executives, directors, and shareholders holding more than 10% of a company’s stock to file within two business days after executing a transaction. By systematically tracking these filings, you gain insight into insiders’ genuine sentiment toward their company’s stock—are they putting real money on the line to buy, or are they aggressively selling off shares? Page Navigation Overview Get an at-a-glance view of capital flows across the entire industry chain. Key metric cards display the 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 over 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 Interconnects (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 Group. 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 transaction details for that group. Comparison All groups appear side-by-side in a single table, enabling direct comparison of sell pressure, median sell size, P90 large-scale transactions, 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.

How to read SEC Form 4 insider trading filings

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 site to find the website’s 'Action Code' explanation: B and S are straightforward: standard Buy and Sell. But what distinguishes AB (Automatic Buy) and AS (Automatic Sale) from ordinary B and S? Also, why does the second website frequently list D (Disposed), while the first never shows it? And what about GD/GA—codes absent from the Action Code explanation? To answer these questions, we must refer to the original source document filed by insiders: the SEC Form 4. Take Jensen Huang—the CEO of NVIDIA, famed for his sharp strategic execution—as an example. Click the 'Form' button at the end of any transaction record (or go directly to the SEC’s official EDGAR website and search for NVDA to view 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): 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 frequent), 'preferred stock', etc. Most cases involve common stock. 2: Transaction Date 3: Transaction Code—this is the most critical field. Beyond 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 explanations for all are compiled later in this guide. 4: Number of Shares—i.e., the quantity transacted. 5: Acquired or Disposed—this is the second key field. Regardless of the transaction code used, every transaction ultimately results in either an increase or decrease in the reporter’s shareholding: 'Acquired' means the reporter’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.

Dow Inc CFO Files Form 4 for Stock Transaction

2 days ago

Jeffrey L. Tate, CFO of Dow Inc., filed a Form 4 disclosing the disposition of 25,564 shares withheld for tax purposes at $33.99 per share on October 26, 2026.

StreetInsider

2026-10-28

Dow Inc CFO Files Form 4 for Stock Transaction

2026-10-29

Dow Inc. CFO Jeffrey L. Tate Files Form 4 on October 26

Dow Inc CFO Files Form 4 for Stock Transaction

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