Private document study
Import PDFs or SEC filing text and study them directly on your device.
Core Product · On-device study workspace
Deep Simplicity Core
A private study workspace for serious investors who want to read filings with more focus, structure, and discipline. Import SEC filings and PDFs, ask questions, and turn dense source material into organized study notes.
On your device · Private · For education and research only
On-deviceStudy ActionsPage-grounded
Deep Simplicity Core is designed around a simple principle: better investing begins with better reading.
What it does
Key features
Instead of skimming long reports, work through a company's business model, risk factors, management discussion, competitive position, and key operating themes in a more deliberate way.
Structured Study Actions
Use guided templates such as Quick Summary, Business Overview, Risk Review, Moat Analysis, Management Review, and One-Page Memo.
Document-grounded answers
Ask questions about the active document and review responses based on relevant excerpts from the filing or PDF.
Beginner and Pro modes
Choose a simpler explanation style or a more detailed investor-oriented style depending on how you want to study.
Clean reading workflow
Move from import to library to study without clutter. The interface is built to stay calm, focused, and easy to use.
Privacy-first design
Your documents and questions are processed on device. Deep Simplicity Core does not rely on a cloud chat service for its core study experience.
Structured Study Actions
Quick SummaryBusiness OverviewRisk ReviewMoat AnalysisManagement ReviewOne-Page Memo
Interactive demo
Study a real letter through three masters' eyes
A simulated preview built from Berkshire Hathaway's public 2024 shareholder letter. Read it through the lenses of Buffett, Munger and Graham — each grounded in a real, cited quote from their own writing — and see how Core turns dense source material into disciplined notes. Everything runs in your browser.
Berkshire Hathaway — 2024 Letter to Shareholders
We recorded operating earnings of $47.4 billion in 2024. We regularly — endlessly, some readers may groan — emphasize this measure rather than the GAAP-mandated earnings. Our measure excludes capital gains or losses on the stocks and bonds we own… though the year-by-year numbers will swing wildly and unpredictably.
Over the past two decades, our insurance business has generated $32 billion of after-tax profits from underwriting… Meanwhile, our float has grown from $46 billion to $171 billion… and, with intelligent underwriting (and some luck), has a reasonable prospect of being costless.
Berkshire shareholders during the 1965-2024 period received only one cash dividend. On January 3, 1967, we disbursed our sole payment — 10¢ per A share… For sixty years, Berkshire shareholders endorsed continuous reinvestment.
Berkshire will never prefer ownership of cash-equivalent assets over the ownership of good businesses… Paper money can see its value evaporate if fiscal folly prevails.
The cardinal sin is delaying the correction of mistakes — what Charlie Munger called "thumb-sucking." Problems, he would tell me, cannot be wished away. They require action, however uncomfortable that may be.
Study this letter through a master’s lens
Pick a lens above — see how Buffett, Munger or Graham would read this real letter.
Interactive simulation — no AI model is called and no document is uploaded. Figures are approximate and for education only.
Grounded in: Graham — The Intelligent Investor & Security Analysis · Munger — Poor Charlie’s Almanack · Buffett — Berkshire Letters (1965–2024).
Who it's for
Built for disciplined readers
Deep Simplicity Core is built for long-term investors, students, analysts, founders, and professionals who want a more disciplined way to read company documents and form their own judgment.
Long-term investorsStudentsAnalystsFoundersProfessionals
Ownership & important notice
Deep Simplicity Core™, including its Study Actions, workflow, and design, is proprietary to Deep Simplicity LLC. © 2026 Deep Simplicity LLC. All rights reserved. No part of the app or its features may be copied, reproduced, reverse-engineered, or recreated without written permission.
Deep Simplicity Core does not provide investment advice, financial planning, brokerage services, trading services, or buy and sell recommendations. It is intended for education, research, and personal study only.