In the 2026 capital markets, Berkshire Hathaway stands at a delicate turning point. Greg Abel formally took over as chief executive at the start of the year, and while Warren Buffett has stepped back into the chairman role, the investment framework he honed over decades remains an unavoidable frame of reference for value investors worldwide. For ordinary investors determined to follow the Oracle of Omaha, the real challenge has never been “what to buy” but “how to follow”—especially amid lagging information and intensifying market games, blindly copying a holdings list often yields half the results for twice the effort. This article systematically breaks down the key steps of practical co-investing to help investors build a following system of their own.
1. Know the Rules of the Game: The Triple Lag of 13F Filings
The main gateway for following Buffett is the SEC's quarterly 13F holdings report. This filing requires institutional investors managing over $100 million to disclose their long positions in US stocks within 45 days after each quarter ends. For followers, this means three time gaps:
- Disclosure lag: A position Berkshire finished building by the end of Q1 may not become visible to investors until mid-May, by which time the stock may have already risen substantially;
- Staged accumulation: Big money rarely completes a position in one go—the “new position” seen in a 13F is often only 20-30% of the planned allocation;
- Ambiguous adjustments: The filing only shows a quarter-end snapshot, so the intra-quarter trading rhythm cannot be reconstructed—whether it is “adding” or “switching” positions must be inferred on your own.
History offers no shortage of lessons: Berkshire once rapidly built and then decisively exited airline stocks, and many copycats entered high and exited low. This reminds us: a 13F is a starting point for research, not a trading instruction.
2. Signal Grading: Not Every Position Is Worth Following
In practice, it is advisable to classify Berkshire's moves into three signal levels:
Strong signal: a large new position within the circle of competence
The odds of successful following are highest when Berkshire opens a large new position in consumer, financial, or energy—fields Buffett has long cultivated—and the shareholder letter or annual meeting provides a clear buying rationale. The classic Apple case is exactly this: the sustained accumulation since 2016 reflected a reclassification of Apple as a “consumer-oriented tech stock,” not a mere chase of tech fads.
Moderate signal: significant additions or cuts to core holdings
A directional change to a core position held for many years often reflects management's renewed judgment on valuation or fundamentals. For example, the continued accumulation of Japan's five major trading houses conveys long-term endorsement of a low-valuation, high-dividend, stable-payout model—such signals suit staged following.
Weak signal: small exploratory positions and arbitrage structures
Small exploratory positions and arbitrage structures between convertible bonds and their underlying stocks are essentially efficiency games of big capital. Ordinary investors have neither a cost nor an information advantage, and blind following can easily turn you into the one left holding the bag.
3. A Five-Step Practical Framework: From Copying Trades to Copying Logic
Step 1: Anchor valuation and refuse to chase indiscriminately
The core discipline of following is to set your own ceiling on the entry price. Reference the historical cost of Berkshire's accumulation range and combine metrics such as the P/E ratio and free cash flow yield to estimate the zone where it most likely bought. If the current price is far above that zone, wait for a pullback rather than chase. Buffett's principle is “buying a wonderful company at a fair price is far better than buying a mediocre one at a cheap price,” but the premise of that statement is that the price is still fair.
Step 2: Tier your positions and control single-stock exposure
A following portfolio need not replicate Berkshire's concentration. Suggested allocation: core positions (40%-50%), watchlist positions (20%-30%), and flexible positions (10%-20%), with a cap of 15% on any single name to leave room for correcting mistakes in judgment.
Step 3: Cross-validate and seek independent logic
Before buying, ask yourself one question: if Berkshire's name were not on the 13F, would I still want to own this company? Only when all four dimensions—business model, moat, management, and valuation—stand on their own does following carry a true margin of safety.
Step 4: Set review checkpoints and exit discipline
Following is not buy-and-forget. Use each quarterly 13F disclosure as a review checkpoint: if Berkshire has reduced the position for two consecutive quarters, re-examine whether the original buying logic has been broken; if the change is only minor, do not overreact and get shaken out by short-term noise.
Step 5: Use a decision journal to fight emotions
Keep a decision journal for every followed position, recording the buying rationale, valuation basis, and expected holding period. Reviewing the journal during sharp market swings effectively blocks the contagion of “when others are fearful, I am even more fearful”—this is also the psychological foundation on which compounding accumulates.
4. Three New Variables of the Post-Buffett Era
- Change in decision structure: With Abel at the helm, capital allocation may lean more toward infrastructure and energy operations; followers should watch for preference signals in his public statements rather than mechanically reusing the Buffett-era stock-picking profile;
- The lesson of record cash levels: Berkshire has long maintained historically high cash reserves in recent years—this itself is a market view: great opportunities have become scarcer. Followers should learn to treat “not buying” as a signal too;
- Follow the framework, not the stocks: The circle-of-competence principle, margin of safety, and moat thinking—the value of these methodologies transcends any single holding, and they are the most reliable legacy Buffett leaves to his followers.
Conclusion
The highest level of following Buffett is not replicating his holdings but reusing his way of thinking. The 13F provides the clues, valuation provides the discipline, position management provides the fault tolerance, and independent judgment is the ultimate moat. During Berkshire's leadership transition, the value of this system will only become more pronounced—because when the “homework” you copy is itself changing handwriting, only by understanding the problem-solving approach behind it can you keep getting the exam right in the next cycle.
