Market Insights

Filing season is only useful if you know which deadlines matter and which position changes deserve your attention first.

When passive giants share most of their top ten, the overlap is not a boring coincidence. It is a market-structure signal that helps define the baseline every active portfolio should be judged against.

Comparing passive giants by raw dollar positions will usually tell you what is biggest in the market, not who is making the most differentiated decision. The right comparison starts elsewhere.

A new holding in a trillion-dollar 13F can look like a stock-picking signal. In practice, it often reflects benchmark changes, wrapper shifts, or position-size thresholds rather than a fresh thesis.

Big 13F filings from index managers can look like genius stock-picking. Most of the time, they are a map of benchmark exposure, cash flows, and rebalancing pressure instead.

Form 4 filings track insider buys, sells, and exercises at public companies. Learn how to interpret insider transactions and what they signal about company outlook.

Some of the best-performing institutional investors hold concentrated portfolios. Learn what portfolio concentration reveals and when it matters most.

13F filings reveal what the world's largest institutional investors own. Learn how to read them, when they're filed, and how to use them for smarter investing.

Learn how to systematically compare quarterly 13F filings to spot portfolio changes, new positions, exits, and sector shifts that signal institutional investor strategy.

Learn how to interpret AUM history charts on filer detail pages, spot growth trends, and understand what drives institutional portfolio changes.

Learn how to interpret insider buying transactions on Form 4 filings. Discover what makes a buy meaningful, how to filter noise, and how to use insider trading data to inform your investment decisions.

Learn how institutional investors use portfolio concentration as a strategy, and how to spot concentrated vs. diversified portfolios on 13F Insight.

A calendar guide to 13F filing deadlines, amendment windows, and how to plan your institutional holdings research around quarterly filing season for maximum efficiency.

A step-by-step guide to setting up and using 13F Insight watchlists to track institutional filers and stocks. Learn what to add, how to time your research around filing season, and how to interpret watchlist activity.

A practical guide to using whale scores for screening, comparing, and evaluating institutional 13F filers. Learn when high scores are misleading and how to combine scores with other data for smarter research.

Learn how to use quarter-over-quarter changes in 13F filings to identify when institutional investors are accumulating or distributing positions, and why share count changes matter more than value changes.

Want to see what Berkshire Hathaway, Citadel, or Bridgewater is buying? 13F filings let you peek inside hedge fund portfolios every quarter. Here's how to find, read, and interpret the data.

SEC Schedule 13D is required when an investor acquires more than 5% of a company with an intent to influence management. Here's what 13D filings reveal about activist campaigns and why they matter.

Assets Under Management (AUM) is the total market value of investments managed by a fund or institution. Here's what it means, how it's calculated in 13F filings, and why it matters for investors tracking institutional portfolios.