The 4 Pillars of Buffett's Approach
Warren Buffett has led Berkshire Hathaway since 1965, achieving an annualized return of roughly 20% -- far exceeding the S&P 500. His success comes not from complex quantitative models or frequent trading, but from four simple yet profound investment principles.
Economic Moat
Seek companies with durable competitive advantages that protect long-term profitability from competitors.
Buffett's "moat" analogy refers to the protective barrier around a medieval castle -- it defends the castle (company profits) from invaders (competitors). Companies with wide moats can sustain above-average returns on invested capital over long periods.
Margin of Safety
Only buy when the stock price is significantly below estimated intrinsic value, leaving room for error in analysis.
Both Graham and Buffett stress that even the best analysis can be wrong. Margin of safety means buying at 70% or less of intrinsic value, so even if your valuation calculations are off, you are unlikely to lose money.
Long-Term Holding
"Our favorite holding period is forever." Buffett seeks quality businesses to own for decades.
Frequent trading generates transaction costs and taxes that erode returns. Buffett believes that if you are not willing to hold a stock for 10 years, you should not hold it for 10 minutes. Long-term holding lets the power of compounding work fully.
Quality Management
Invest in honest, capable management teams that act in shareholders' best interests.
Buffett looks for managers with both business acumen and integrity. He prefers businesses so good that "an idiot could run them, because sooner or later one will." But great management makes good businesses even better.
How to Identify Economic Moats
Identifying economic moats is the most critical step in Buffett's investment process. Here are five main types of moats and how to verify them with financial data:
- Brand strength — Strong brands allow premium pricing. Look for: gross margins above industry average and stable market share. For example, Coca-Cola (KO) has maintained 60%+ gross margins for decades.
- Network effects — The product/service becomes more valuable as more people use it. For example, Visa and Mastercard's payment networks become more valuable with each additional merchant and cardholder.
- Switching costs — It is expensive for customers to switch providers. For example, migrating from Oracle databases to an alternative carries enormous cost and risk.
- Cost advantages — Ability to produce or deliver at lower cost. Look for: below-industry operating cost ratios and economies of scale.
- Regulatory/license barriers — Government licenses or regulations create barriers to entry. For example, banking charters, pharmaceutical patents, etc.
Use our Company Analysis tool to check any company's gross margin, ROE, and other moat-related metrics. A consistently high ROE (above 15%) is often a strong signal of a wide moat.
Buffett's Current Portfolio
As a public company, Berkshire Hathaway must file 13F reports with the SEC every quarter, disclosing all US equity holdings. This allows investors to track changes in Buffett's portfolio.
Buffett's portfolio is typically highly concentrated -- his top 5 holdings often represent over 70% of the total portfolio value. This reflects his philosophy of allocating significant capital to a small number of high-conviction ideas.
See Buffett's complete latest holdings, including position sizes, market values, and quarterly changes:
View Buffett's Latest 13F Holdings →
What Buffett Is Buying Now
By comparing consecutive 13F filings, you can spot Buffett's recent buying and selling activity. While 13F filings have a roughly 45-day delay (they reflect positions at the end of the previous quarter), they remain the best public source for understanding Buffett's investment thinking.
A few things to keep in mind:
- 13F filings only show long positions in US-listed equities -- they exclude private investments, bonds, and short positions
- Berkshire has multiple portfolio managers (Ted Weschler and Todd Combs), so smaller positions may reflect their decisions rather than Buffett's
- Buffett sometimes requests confidential treatment to protect positions he is still building
On our Superinvestors page, you can track portfolio changes for Buffett and other renowned investors.
Applying Buffett's Principles with DeepViews
You can use DeepViews' free tools to systematically apply Buffett's investing principles when screening for stocks:
- Use the screener to find quality companies: In the Stock Screener, set filters like ROE > 15%, gross margin > 30%, debt-to-equity < 50% to find companies with moat characteristics.
- Analyze fundamentals: On the Company Analysis page, dive into a candidate's financial health, industry position, and competitive advantages.
- Calculate intrinsic value: Use the DCF Calculator to estimate intrinsic value and ensure an adequate margin of safety.
- Compare with peers: Check Industry Benchmarks to see whether the valuation is reasonable.
- Track guru holdings: See what Buffett and other superinvestors are buying recently for reference.
Frequently Asked Questions
What stocks does Warren Buffett own?
Buffett manages a large equity portfolio through Berkshire Hathaway. His largest holdings typically include Apple (AAPL), Bank of America (BAC), Coca-Cola (KO), Chevron (CVX), and American Express (AXP). You can view his complete latest holdings on our Superinvestors page, based on the most recent 13F filing.
How does Buffett pick stocks?
Buffett looks for companies with durable competitive advantages (economic moats), reliable management, predictable earnings, and stock prices at a discount to intrinsic value. He prefers simple businesses he can understand and emphasizes long-term holding over frequent trading.
What is an economic moat?
An economic moat is a durable competitive advantage that protects a company from competitors. Common types include: brand strength (e.g., Coca-Cola), network effects (e.g., Visa), switching costs (e.g., Apple ecosystem), cost advantages (e.g., Costco), and regulatory barriers. The wider the moat, the more secure the company's long-term profitability.
How can regular investors apply Buffett's strategy?
Regular investors can apply Buffett's principles by: 1) focusing on industries and companies they understand; 2) using DCF analysis and valuation multiples to find undervalued stocks; 3) prioritizing competitive advantages and management quality; 4) maintaining patience for long-term holding without reacting to short-term market swings; 5) always maintaining a margin of safety and not overpaying even for great companies.