Sarah Mitchell
Education Editor
Investment Education Editor at 13F Insight. Breaks down complex institutional data into actionable insights for individual investors.
A note from Sarah
Hi, I'm Sarah. I spent four years at Vanguard's Investor Education team, where my whole job was making 401(k) statements feel less like tax forms and more like something a person could actually understand.
I'm here at 13F Insight to do the same thing for institutional data. If you've ever read a headline like "Berkshire Bought Apple" and thought "okay but what does that actually mean for me," that's the gap I want to close.
I'll never assume you know what a CUSIP is. I'll always tell you why a number matters before I give you the number. And if a guide of mine ever leaves you more confused than you started, that's on me — let me know and I'll rewrite it.
Articles by Sarah Mitchell (818)
- Learn
How to See Which Funds Own a Stock
13F data works stock-first too: pick a ticker and see its institutional holders. Here's how to read a stock's holder base — and filter real conviction from passive ownership.
- Learn
GOOG vs GOOGL: Why a 13F Lists Alphabet Twice
Alphabet shows up as both GOOG and GOOGL in 13Fs — two share classes, not a duplicate. Here's the difference and why you should combine them to gauge exposure.
- Learn
Dividend-Growth Investing: Reading an Income 13F
Owning companies that raise dividends yearly is different from chasing the highest yield. Here's what dividend-growth investing is and how to spot it in a 13F.
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Why Active Funds Hold S&P 500 and Nasdaq ETFs
Why would a stock-picker own the index it's trying to beat? Index ETFs in active 13Fs are usually beta sleeves or cash management. Here's how to read them.
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What a 13F Does Not Show: The Blind Spots
A 13F is only a slice of a fund's portfolio. It hides shorts, cash, bonds, and foreign holdings. Here's what 13F filings leave out — and how to read them anyway.
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Why a 13F Is Already Weeks Old When You Read It
A 13F reports holdings as of quarter-end and can be filed 45 days later — so it's a rear-view mirror. Here's how the reporting lag works and when it matters.
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Value vs Growth: Reading a Fund's Style From Its 13F
A fund's holdings reveal whether it's a value or growth investor — often in the first few names. Here's how to read style from a 13F, with real examples.
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How to Read a Sovereign Wealth Fund's 13F
Sovereign wealth funds like Temasek and Norges Bank file 13Fs too. Here's what makes them different from index funds and hedge funds — and how to read their holdings.
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Convertible Securities in a 13F: The Hybrid Holding
Some 13F lines aren't stocks — they're convertible bonds, with a coupon and maturity. Here's what convertibles are, why they appear in 13Fs, and how to read them.
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Holding Companies in a 13F: When 30% Isn't Concentrated
A 30% stake in Berkshire Hathaway looks extreme but isn't — it's a diversified portfolio in one line. Here's how holding companies change 13F concentration math.
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How to Read an ESG Fund's 13F Holdings
ESG and responsible funds screen stocks on values as well as returns. Here's how that screening shapes a 13F — and what the filing can and can't tell you.
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What Is Quality Investing? How to Read a Quality 13F
Quality investors own durable, profitable businesses and hold them for years. Here's what quality investing means and how to recognize a quality 13F.
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New, Add, Trim, Exit: Reading 13F Position Changes
A 13F's 'bought' and 'sold' hide four very different moves. Here's how to read new positions, adds, trims, and exits — and which carry the most signal.
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Low Turnover: What a Mostly-Flat 13F Is Telling You
When a fund holds its positions flat and the value still drops, that's market beta, not selling. Here's how to read low turnover and 'held roughly flat' 13Fs.
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Beneficial vs Direct Ownership: How Much Insiders Really Own
A Form 4 can show an insider holding a few thousand shares while they actually control tens of millions. Here's how to read direct vs beneficial ownership.
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Exercise-and-Sell on a Form 4: Why It Looks Worse Than It Is
An option exercise paired with a same-day sale can make an insider's share count look near-zero. Here's how to read exercise-and-sell Form 4 filings correctly.
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The Mega-Bet: When a Fund Puts a Third in One Stock
Some hedge funds put 30% or more of their book in a single stock - by conviction, not control. That outsized bet is the purest signal of conviction, and of risk. Here is how to read it.
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How to Spot a Defensive 13F: Reading a Risk-Off Book
No single line proves a manager has turned cautious, but a constellation - cash, staples, utilities, gold, trimmed growth - does. Here is how to read a risk-off posture in a 13F.
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How to Read an Income Fund's 13F: Yield Over Growth
Income-focused funds buy for distributions, not appreciation - clustering in MLPs, utilities, and REITs. Reading their 13Fs means judging by yield and cash flow, not growth.
- Learn
What a T-Bill ETF in a 13F Signals: Cash and Caution
When a stock manager's largest holding is a Treasury-bill ETF, it is parking cash in plain sight. Here is how to read a cash-equivalent position in a 13F.