Updated Mar 9, 2026 · 794 articles
Learn
Educational guides about 13F filings, insider trading, institutional investing, and how to track smart money moves.
How to Compare Two 13F Filings Using Top-Five Weight, Turnover, and Churn
A practical guide to comparing two institutional filings without getting trapped by holdings count, headline AUM, or one-off position anecdotes.
Sarah MitchellHow to Read ETF-Heavy 13Fs Without Confusing Convenience for Conviction
A practical guide to what ETF-heavy 13F filings really signal, where they help, and why broad wrappers do not automatically erase portfolio structure.
Sarah MitchellHow to Read Whale Scores: Measuring Institutional Investor Quality Without Worshipping Size Alone
A practical guide to what WhaleScore is actually trying to measure, where it helps, and why raw AUM alone is a bad shortcut for institutional quality.
Sarah MitchellWhat a 13D Filing Really Means: How to Read Activist Stakes, Passive Stakes, and Amendments
A practical explainer on how 13D and 13G filings work, why amendments matter, and how to read control intent without overreacting to every percentage point.
Sarah MitchellHow to Read a Big 13F AUM Jump Without Mistaking It for a New Investment Thesis
A huge AUM swing can look dramatic, but it does not always mean a manager suddenly changed its mind. Here's how to separate a portfolio reset from real conviction.
Sarah MitchellBenchmark Wrappers vs Direct Ownership: How to Read Both Together
A filing can own broad-market ETFs and the same flagship stocks directly. The right reading comes from looking at both layers together.
Sarah MitchellHow to Spot a Value-Growth Barbell in a 13F
Some managers balance value and growth explicitly through sleeves such as VTV and VUG. Here is how to recognize that structure.
Sarah MitchellHow to Read Trading-Firm 13Fs
Trading-firm filings often mix benchmark wrappers, tactical ETFs, and high-beta single names. They need a different reading than advisor or pension books.
Sarah MitchellHow to Read Custodian-Bank 13Fs
Custodian-bank filings often share the same market leaders, but subtle differences in breadth still matter.
Sarah MitchellHow to Read Pension and Sovereign 13Fs Without Expecting Hedge-Fund Behavior
Pension and sovereign-style filers often care more about hierarchy and durability than about flashy quarter-to-quarter trades.
Sarah MitchellHow to Read Defensive Stocks Inside a Growth-Heavy 13F
A defensive stock near the top of a growth-heavy filing often tells you the manager is shaping outcomes, not just chasing a single market narrative.
Sarah MitchellWhat Top-Three Concentration Tells You About a Fund
Top-three concentration is a fast way to understand whether the very front of a portfolio is doing too much of the work.
Sarah MitchellWhat SPY, IVV, and VOO Really Signal in a 13F
Broad-market ETF lines often say more about benchmark architecture than about a manager being passive or uninteresting.
Sarah MitchellWhy GOOG and GOOGL Show Up Separately in 13F Filings
Alphabet often appears twice in 13F filings. That does not mean a manager has two different theses. It usually means two share classes.
Sarah MitchellHow to Read International ETF Sleeves in a 13F
International ETFs often reveal whether a manager is truly global or still mostly U.S.-centric with a token foreign sleeve.
Sarah MitchellWhy Mega-Cap Overlap Does Not Mean Two Funds Are Clones
Many institutional portfolios share the same famous names. That does not make them copies. Weight, breadth, and supporting sleeves still matter.
Sarah MitchellHow to Tell Whether a Stock Is a Real Thesis or Just a Benchmark Artifact
Many large funds own the same stocks. The key is figuring out whether a name is a deliberate conviction call or just inherited from the benchmark.
Sarah MitchellWhat Top-Ten Breadth Tells You That Top-Five Concentration Misses
Top-five concentration is useful, but top-ten breadth often gives a better sense of how much room is left outside the headline names.
Sarah MitchellHow to Use 1%, 3%, 5%, and 10% Position Weights in 13F Analysis
Position-weight thresholds help you separate noise from genuine conviction. Here is a practical way to use 1%, 3%, 5%, and 10% in 13F reading.
Sarah Mitchell