Marcus Chen
Senior Market Analyst
Senior Market Analyst at 13F Insight. Covers institutional portfolio strategy, 13F filings, and smart money trends.
A note from Marcus
Hi, I'm Marcus. I spent six years on the buy side staring at 13F filings for a hedge fund, and the thing that bothered me most wasn't the work — it was knowing that the average investor never gets to see what I was looking at, even though it's all public.
That's why I'm here. Every research piece you'll see under my name comes from real SEC data, run through real institutional logic, and translated into something you can actually act on. I write long when the data deserves it and short when it doesn't.
If you ever spot a number that looks off, email me. I'd rather be corrected than wrong.
Articles by Marcus Chen (524)
- Research
Sound Shore 13F (2026 Q1): A Balanced Large-Cap Value Book
Sound Shore runs a flat, 40-stock relative-value book where no position tops 4%. Its 2026 Q1 filing pairs a genuinely steady asset base with an active rotation, trimming Teva and Citigroup while adding to healthcare and select technology names.
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Harding Loevner 13F (2026 Q1): A Global Quality-Growth Book
Harding Loevner hunts for quality growth wherever it trades. Its 2026 Q1 book spans Taiwan Semiconductor, ASML, MercadoLibre, Ryanair and HDFC, and the reliable signal is the share-count moves: trims in semis and Indian banking, adds in rail and transport.
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Tweedy Browne 13F (2025 Q4): A Graham-Lineage Global Value Book
Tweedy Browne traces straight back to Benjamin Graham, whose trades the firm once brokered. Its 2026 Q1 US sleeve is a global-value lineup, CNH Industrial, Coca-Cola FEMSA, Berkshire, with a big CNH add and an Ionis trim, and it understates a far larger international book.
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Brave Warrior 13F (2026 Q1): Glenn Greenberg's Concentrated Book
Glenn Greenberg runs Brave Warrior the way he has invested for four decades: a short list of businesses sized so that being right truly matters. His 2026 Q1 book holds just 36 names, with the top ten near three-quarters of value and a decisive new ICON plc stake.
- Learn
Reading REIT and Real-Estate Exposure in a 13F
REITs trade on rates, rents, and property cycles, not normal earnings. Here's what a fund's real-estate exposure signals and why the type of REIT matters.
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Cyclical vs Defensive: A Fund's Economic Tilt
Whether a 13F leans cyclical or defensive reveals a fund's implicit economic view. Here's the split, what each tilt signals, and how to read shifts between them.
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The Value-Investing Lineage: Graham to Buffett to Today
Value investing has a family tree — from Graham to Buffett to the Sequoia school. Here's how that shared DNA shows up across value managers' 13Fs.
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Giverny Q1 2026: A Sequoia-Lineage Quality Book
David Poppe's Giverny Capital holds a concentrated quality-compounder book — Berkshire, Alphabet, Heico — and trimmed Berkshire and Ametek in Q1 2026.
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Smead Q1 2026: A Contrarian Bet on Energy and Malls
Smead Capital's contrarian value book leans hard into energy, mall REITs, and homebuilders. In Q1 2026 it trimmed the whole book ~13% on outflows, thesis intact.
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Ariel Q1 2026: John Rogers' Patient Mid-Cap Value Book
Ariel Investments' contrarian mid-cap value book — MSG Entertainment, JLL, Affiliated Managers — held steady in Q1 2026, true to John Rogers' patient style.
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Fund-of-Funds 13Fs: A Secondhand Signal
A fund-of-funds invests in other funds, not stocks directly — so its 13F is a derivative signal. Here's why their holdings aren't direct stock picks.
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Liquidity: How Big Funds Move (and Get Stuck in) Stocks
Liquidity is the invisible constraint on what large funds can own. Here's how it drives megacap clustering, small-cap diversification, and hidden exit risk in 13Fs.
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When a 13F Is Mostly One Company (Control Stakes)
Some 13Fs are 90%+ a single stock — not a wild bet, but a parent reporting its own public subsidiary. Here's how to spot and read a control-stake filing.
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Sustainable Growth Advisers Q1 2026: Quality Growth
SGA's concentrated quality-growth book is led by Nvidia, Amazon, and Microsoft, with a sharp Broadcom add the standout move in its Q1 2026 filing.
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Royce Q1 2026: A Hyper-Diversified Small-Cap Book
Royce & Associates spreads its $10B across hundreds of small-cap names — no position above 1.4%. A look at deep diversification in small-cap value investing.
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Generation IM Q1 2026: Al Gore's Fund Doubles Amazon
Al Gore's Generation Investment Management doubled its Amazon stake in Q1 2026 within a concentrated sustainable-quality book led by Microsoft and Danaher.
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How Market Drawdowns Show Up in 13F Data
In a selloff, a 13F's value falls from prices and from selling — two very different things. Here's how to read share counts to tell what a manager actually did.
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Constructivist vs Aggressive Activism
Some activists collaborate with management; others wage public proxy fights. Here's the spectrum from constructivist to aggressive activism and why the style matters.
- Learn
Pod Shops: Reading a Multi-Manager Platform's 13F
Millennium and Citadel run hundreds of independent pods, and their 13Fs aggregate them all. Here's why a pod shop's filing rarely reflects a single view.
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Maverick Q1 2026: A Tiger Cub Rotates Beyond Semis
Lee Ainslie's Maverick trimmed semiconductors and added Nu Holdings +92%, Boston Scientific +76%, plus new RTX and Argan in Q1 2026 — a Tiger cub broadening its growth book.