Updated Apr 1, 2026 · 656 articles
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Educational guides about 13F filings, insider trading, institutional investing, and how to track smart money moves.
How to Use Historical Quarter Pages to Find Real Position Changes
Historical quarter pages are the easiest way to stop comparing the wrong snapshots. Here is how to use them to isolate real change instead of filing-noise.
Sarah MitchellHow to Compare Two 13F Filers Without Letting AUM Fool You
A bigger 13F portfolio does not automatically mean a better idea source. Here is a cleaner way to compare managers using concentration, turnover, and stock-level context.
Sarah MitchellHow to Sanity-Check a 13F Thesis in 10 Minutes
Before copying a trade idea from institutional filings, run this 10-minute sanity-check workflow using filer quality, concentration context, and stock-level holder data.
Sarah Mitchell13F Value vs Shares: Why You Need Both to Read Institutional Conviction
A position's dollar value can rise even when a manager trims shares. Learn how to use both value and share count to avoid false conclusions in 13F analysis.
Sarah Mitchell13F Report Date vs Filing Date: How to Avoid 45-Day Timing Mistakes
Many investors misread 13F timing. Learn the difference between report date and filing date so you stop reacting to positions that were set weeks earlier.
Sarah MitchellHow Smart Alerts Detect Unusual Institutional Activity Before Everyone Else
Learn exactly what triggers Smart Alerts on 13F Insight, how to read each signal, and a practical workflow to turn unusual institutional activity into better decisions.
Sarah MitchellHow to Export and Analyze 13F Holdings Data Outside the Platform
A practical walkthrough for using 13F Insight exports in spreadsheets and Python, with tier-specific guidance for CSV and JSON workflows.
Sarah MitchellHow to Connect AUM History With Holdings Changes to Find Real Conviction
A rising position can mean fresh buying, but it can also mean a rising stock inside a portfolio that is already getting larger for other reasons.
Sarah MitchellHow to Read a Stock Holder List Without Confusing Big Positions for Fresh Buying
A large holder is not automatically a recent buyer. Holder lists are most useful when you compare them across quarters and against portfolio context.
Sarah MitchellHow Dual-Class Share Structures Distort Insider Ownership Signals
If you only read Table I or only look at one ticker line, you can end up calling a founder out when they still control the company.
Sarah MitchellHow to Use Insider Profile Pages to Separate Routine Sellers From New Signals
The insider profile page is where you decide whether a fresh filing fits a long-running pattern or breaks from the insider's usual behavior.
Sarah MitchellHow to Read Locked Historical Quarters on 13F Insight Without Misunderstanding Tier Limits
A locked quarter does not mean the data is bad. It means the page is older than your plan allows for full detail access.
Sarah MitchellHow to Use Historical Quarter Pages Without Chasing a Stale Position
Historical quarter pages are useful when you want context, but dangerous when you forget that the portfolio snapshot is old by design.
Sarah MitchellWhy Form 4 Tax Withholding Is Not the Same as Open-Market Selling
Code F can look like insider selling in a headline, but it usually reflects shares withheld to cover taxes after vesting or exercise events.
Sarah MitchellHow to Read a Multi-Insider Cluster Without Calling It a Bearish Signal
When several executives file Form 4s around the same week, the right question is whether they sold, bought, exercised, or just covered taxes.
Sarah MitchellHow Form 4 Table I Can Mislead You About Insider Ownership in Multi-Class Companies
A Form 4 can show zero Class A shares after a sale even when the insider still controls a large beneficial stake elsewhere. Here is how to read Table I, Table II, and 13D or 13G together.
Sarah MitchellWhy Share Count Changes and Portfolio Weights Can Tell Opposite Stories in 13F Data
A manager can buy more shares and still show a lower portfolio weight, or cut shares while a position looks bigger. This guide explains how to read both signals together.
Sarah MitchellWhy Options-Heavy 13Fs Can Mislead Retail Investors
An options-heavy 13F can look aggressive, bearish, or brilliant when it may simply be hedged structure. Here is how to read those portfolios correctly.
Sarah MitchellWhale Scores Explained: How to Rank Managers Without Overfitting
Whale Scores are useful ranking tools, but only if you read them as context, not as a shortcut that replaces actual analysis.
Sarah Mitchell