Updated May 2, 2026 · 798 articles

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Educational guides about 13F filings, insider trading, institutional investing, and how to track smart money moves.

May 2, 2026
May 1, 2026
May 1Learn

Understanding AUM: What Assets Under Management Really Means

AUM is the headline figure for every major fund, but 13F AUM is often very different from a firm's total assets. Learn what's included, what's missing, and why it matters.

Sarah Mitchell
May 1Learn

How to Tell Passive Managers from Active Stock Pickers in 13F Data

Not all institutional investors are looking for 'alpha.' Learn how to distinguish between passive index trackers and high-conviction active managers using SEC 13F filings.

Sarah Mitchell
May 1Learn

How to Use Stock Holder Pages to Identify Crowded Trades

Marcus Chen
May 1Learn

13D vs 13G: Understanding Activist Signals and Passive Holdings

Know the difference between a high-stakes activist stake (13D) and a routine institutional filing (13G). A guide to SEC beneficial ownership filings.

Sarah Mitchell
May 1Learn

Whale Scores Demystified: How to Rank Institutional Investors by Quality

Not all institutional 13F filings are created equal. We explain how our Whale Score ranks managers by conviction and performance.

Sarah Mitchell
May 1Learn

From 13F to Form 4: How to Build a Complete Institutional & Insider Watchlist

Master the art of synthesizing SEC filings. We provide a framework for combining institutional moves with insider signals for high-conviction stock ideas.

Sarah Mitchell
May 1Learn

Inside the Multi-Class Trap: How Form 4 Table I Misleads About Insider Ownership

Why a "zero share" balance on a Form 4 doesn’t always mean an insider has exited. We demystify Table I vs. Table II for smarter investor analysis.

Sarah Mitchell
May 1Learn

Separating 10b5-1 Sales from Discretionary Insider Signals

Not all insider selling is bearish. Learn how to distinguish between scheduled diversification plans and genuine discretionary conviction changes.

Sarah Mitchell
May 1Learn

How to Track Hedge Fund Portfolios: Turning 13F Data into Actionable Intelligence

Learn the professional way to track hedge fund 13F filings. Discover how to identify elite whales, filter for concentration, and spot institutional consensus.

Sarah Mitchell
May 1Learn

What Is a 13D Filing? Understanding Activist Investor Positions

Learn how the SEC Schedule 13D filing helps you identify activist investor entries and potential catalysts for corporate change.

Sarah Mitchell
May 1Learn

Understanding Portfolio Concentration: When Fewer Holdings Mean More

Learn why institutional portfolio concentration is a powerful signal of conviction and how to use Top-10 weighting to find the best investment ideas.

Sarah Mitchell
May 1Learn

What Is a 13F Filing? A Beginner's Guide to Institutional Holdings

Learn the basics of SEC Form 13F, who is required to file, and how you can use this data to track the world's most successful investors.

Sarah Mitchell
May 1Learn

What Is a 13D Filing? Understanding Activist Investor Positions

Learn how 13D filings signal activist investor intent and why crossing the 5% threshold is one of the most important events in a stock's lifecycle.

Sarah Mitchell
May 1Learn

How to Read Whale Scores: Measuring Institutional Investor Quality

A deep dive into 13F Insight's Whale Score metric and how it helps you separate high-conviction institutional moves from routine rebalancing.

Sarah Mitchell
April 29, 2026