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 (542)
- Research
INTC Ownership Research: 2,592 Holders and 14 Active Top-20 Names
A data-led ownership review of INTC, separating active institutional holders from passive and market-maker exposure.
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GM Ownership Research: 1,575 Holders and 14 Active Top-20 Names
A data-led ownership review of GM, separating active institutional holders from passive and market-maker exposure.
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DAL Ownership Research: 1,386 Holders and 16 Active Top-20 Names
A data-led ownership review of DAL, separating active institutional holders from passive and market-maker exposure.
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Nvidia Ownership Research: 6,028 Holders Ahead of Earnings Week
Nvidia enters earnings week with one of the deepest institutional ownership bases in the market, led by index scale and a visible active-holder layer.
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Tesla Ownership Research: 4,459 Holders Behind the Cybercab Cycle
Tesla's Cybercab production headline lands in a deep holder base where passive ownership and market-maker exposure need to be separated from active conviction.
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AMD Ownership Research: 3,245 Holders and a 13D/G Layer Behind the Chip News
AMD combines broad institutional ownership, active-holder depth and recent 13D/G confluence, making its April 2026 news cycle more than a product headline.
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SiriusXM Ownership Research: Berkshire Leads a 553-Holder M&A Watchlist
SIRIUSXM HOLDINGS INC has 553 institutional holders and 18 active top-20 holders behind its current market catalyst.
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Rivian Ownership Research: R2 Production Meets 852 Institutional Holders
RIVIAN AUTOMOTIVE INC has 852 institutional holders and 18 active top-20 holders behind its current market catalyst.
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Lockheed Martin Ownership Research: 2,915 Holders Behind the Defense Miss
LOCKHEED MARTIN CORP has 2,915 institutional holders and 16 active top-20 holders behind its current market catalyst.
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GE Vernova Ownership Research: Power-Demand Guidance Meets 2,996 Holders
GE VERNOVA INC has 2,996 institutional holders and 17 active top-20 holders behind its current market catalyst.
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POWI Ownership Map: 320 Holders Put Power Integrations Beyond a Thin Small-Cap Signal
Power Integrations has 320 tracked institutional holders, with BlackRock, Vanguard, Neuberger Berman and active small-cap managers creating a deeper ownership map than its size suggests.
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NOW Institutional Ownership Map: $136.0B Across Tracked 13F Holders
NOW had $136.0B of tracked institutional value in 2025Q4. This research map breaks down top holders, concentration, and portfolio-weight signals.
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UBER Institutional Ownership Map: $144.8B Across Tracked 13F Holders
UBER had $144.8B of tracked institutional value in 2025Q4. This research map breaks down top holders, concentration, and portfolio-weight signals.
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ORCL Institutional Ownership Map: $264.2B Across Tracked 13F Holders
ORCL had $264.2B of tracked institutional value in 2025Q4. This research map breaks down top holders, concentration, and portfolio-weight signals.
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IBM Institutional Ownership Map: $180.4B Across Tracked 13F Holders
IBM had $180.4B of tracked institutional value in 2025Q4. This research map breaks down top holders, concentration, and portfolio-weight signals.
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TSLA Institutional Ownership Map: Active Holders Around a Mega-Cap Volatility Stock
Tesla’s latest holder map shows 4,459 institutions and 17 active top-20 holders around one of the market’s most volatile mega-caps.
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AMD Institutional Ownership Map: 3,245 Holders in the AI Chip Trade
AMD’s holder base combines index scale, active managers and trading-firm exposure across the AI semiconductor theme.
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AAL Institutional Ownership Map: Active Capital Behind the Airline Reset
American Airlines has 603 tracked institutional holders, but the key signal is 18 active holders in the top 20.
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LMT Institutional Ownership Map: 2,915 Holders Behind the Defense Prime
Lockheed Martin’s latest holder map shows 2,915 institutions and 16 active top-20 holders behind a long-cycle defense stock.
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INTC Institutional Ownership Map: Active Depth Behind a Crowded Holder Base
INTC has 2,592 tracked institutional holders. This research separates passive scale from active sponsorship.