The Most Comprehensive Hedge Fund Letter Database

An investment research platform for analyzing hedge fund letters, investment pitches, and filings, all in one place.

Trusted by investors for primary-source research from the world's leading hedge funds.

Letters
10,000+

From hundreds of hedge funds across various strategies

Funds
750+

From the most prominent investment managers

Tickers
2000+

Mapped across letters, pitches and filings

Pitches
7000+

Curated bull and bear thesis from letters and various platforms

The BuySide Idea Generation Platform

BuySide primary-source investor research — hedge fund letters, investment pitches, portfolio filings, and insider actions — so investors can generate, validate, and track ideas with confidence.

Hedge Fund Letters

The foundation. The most comprehensive database of hedge fund investment letters, searchable by fund, ticker, theme, and quarter.

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Investment Pitches

The idea engine. Curated bull and bear theses sourced from hedge funds, investor write-ups, and short reports.

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13F Tracking

See what the Buy Side is doing. Analyze portfolio changes, top holdings, and conviction shifts from BSDs - the market’s top investment decision-makers.

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Alerts & Tracking

Stay ahead automatically. Track fund managers, tickers, and sectors - and get notified when new letters are published or positions change.

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Buy Side Insights

Context beyond filings. A curated library of podcasts, original insights, and timeless investment classics from across the Buy Side.

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Explore the Hedge Fund Letter Database

The largest collection of letters to hedge fund investors organized by investment strategy, investment themes, and geographic exposure.

BSD Recommended Letters

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Quarter Fund Key Person QTD YTD Tickers Letter
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“If he could make millions of dollars come out of those phones [screens], he became that most revered of all species:
a Big Swinging D*ck [BSD].

Investment Pitches From the Buy Side and Beyond

A curated database of high-quality investment pitches sourced from hedge funds, investor write-ups, short thesis reports, and other idea-sharing platforms

Featured Investment Pitches

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Date Source Fund Ticker Company Stock Exchange GICS Stance Keywords
2025 Q3 Fund Letters Robotti Value Investors IFP CN Interfor Corporation NYSE Materials Bear Capacity, Cycle, Dilution, Duties, leverage, Lumber, Timber
2025 Q3 Fund Letters 1 Main Capital RLGT Radiant Logistics NYSE Industrials Bull 3pl, Acquisitions, capital allocation, compounding, Freight, Logistics, Transportation, valuation
2025 Q3 Fund Letters Laughing Water Capital NN US NextNav, Inc. NASDAQ Information Technology Bull 5G, Fcc, Gps, growth, Regulation, Spectrum, Telecom, U.s.
2025 Q3 Fund Letters Mayar Capital SOLV US Solventum Corporation NYSE Health Care Bull Activism, cashflow, Cost efficiency, deleveraging, healthcare, innovation, M&A, restructuring, spin-off
2025 Q3 Fund Letters Night Watch Investment Management WDC US Western Digital Corp. NASDAQ Information Technology Bull AI, data centers, duopoly, Margin recovery, semiconductors, spin-off, Storage
2025 Q3 Fund Letters Miller Value Partners Deep Value Strategies NBR Nabors Industries Ltd. NYSE Energy Bull Asset Sale, Automation, Contracts, deleveraging, Drilling, EV/EBITDA, FCF yield
2025 Q3 Fund Letters Wedgewood Partners GOOGL US Alphabet Inc NASDAQ Communication Services Bull advertising, AI, cashflow, cloud, growth, infrastructure, Search, technology
2025 Q3 Fund Letters Sandon Capital SXL Southern Cross Media Group Ltd. Australian Securities Exchange Communication Services Bear Activism, Digital, Governance, media, merger, restructuring
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Alerts, Monitoring and Weekly Updates

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Weekly Articles

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Strait of Hormuz Closed: The 20% Oil Shock & China’s Bold Move

Strait of Hormuz Closed: The 20% Oil Shock & China’s Bold Move

Happy Friday! In this week’s letters, – Goehring & Rozencwajg Associates on oil, LNG…

The Concentration Crisis: Why 60% of US Stocks are Now in Foreign Hands

The Concentration Crisis: Why 60% of US Stocks are Now in Foreign Hands

Happy Friday! In this week’s letters, – Lux Capital on Market Concentration; – Hinde…

14 AI Super Bowl Ads: Are We Reliving the January 2000 Pets.com Bubble?

14 AI Super Bowl Ads: Are We Reliving the January 2000 Pets.com Bubble?

Happy Friday! In this week’s letters, – Saltlight Capital on AI Capex; – African…

The AI Scare Trade: Is the Fog of War Hiding a Bargain?

The AI Scare Trade: Is the Fog of War Hiding a Bargain?

Happy Friday! In this week’s letters, – The D. E. Shaw Group on the…

The AI Clock is Ticking (And Why Einhorn is Dumping Treasuries for Gold)

The AI Clock is Ticking (And Why Einhorn is Dumping Treasuries for Gold)

Happy Friday! In this week’s letters, – Broyhill Asset Management on AI Investments; –…

The Inflation War is Over: AI 2.0, 13F Tracking, and 3 Top Ticker Pitches

The Inflation War is Over: AI 2.0, 13F Tracking, and 3 Top Ticker Pitches

Happy Friday! In this week’s letters, – Hinde Group on the economy and inflation;…

The Great Dispersion: Tracking 100+ Gurus & New Q4 Letters

The Great Dispersion: Tracking 100+ Gurus & New Q4 Letters

Happy Friday! In this week’s letters, – Robotti Value Investors on patience and contrarian…

Gold $10k, AI Bubbles, and the End of a 45-Year Trend

Gold $10k, AI Bubbles, and the End of a 45-Year Trend

Happy Friday! In this week’s letters, – Equity Management Associates on Trump, Economy, Gold…

Citadel’s $5B Return, Buffett’s Selling Spree, and 3 Fresh Stock Pitches

Citadel’s $5B Return, Buffett’s Selling Spree, and 3 Fresh Stock Pitches

Happy Friday! In this week’s letters, – Pernas Research on the mean reversion and…