Berkshire Hathaway Outperformed the S&P 500 Over a 60-Year Period Under Warren Buffett. Here's the Stock That Could Help Continue the Streak Under Greg Abel.

Apple remains Berkshire Hathaway’s largest public equity holding at over 20% of a $73.8B portfolio value, making it the key driver for Greg Abel’s effort to outperform the S&P 500. However, valuation is a clear headwind: Apple trades at a 37.2 P/E and is up 19% in 2026 with limited margin of safety, despite fundamentals showing revenue up 16.2% YoY through the first nine months of fiscal 2026. Berkshire’s cash balance is also a drag: $365.5B in cash and short-term Treasuries equals 34% of market cap, limiting deployable opportunities.

Analysis

The core issue is not Apple’s operating quality; it is that BRK’s equity return profile is increasingly hostage to one very large, very mature asset plus an oversized cash stack. That creates a ceiling on upside: if AAPL stalls, BRK loses its biggest source of market beta; if AAPL rallies, the contribution still gets diluted by a balance sheet that cannot redeploy capital fast enough to compound at the same rate. If rates roll over, the drag gets worse because the opportunity cost of sitting on cash rises relative to the earnings growth you can actually buy.

Second-order, BRK is drifting from a classic capital-allocation story toward a quasi-index with a defensive option overlay. That should help in a drawdown, but it also means investors may increasingly value it versus SPY or XLF on risk-adjusted returns rather than paying a Buffett/Abel premium for allocation skill. The key falsifier is visible deployment: a large acquisition, materially higher repurchases at a wider discount, or a sustained step-up in investment income that offsets lower policy rates.

Contrarianly, the cash is not just dead money; it is embedded optionality that tends to monetize exactly when crowded names unwind. The consensus may be overpricing the idea that BRK is permanently stuck in the penalty box and underpricing the next dislocation where size becomes an advantage. Time horizon matters: the note is mostly noise over days to weeks, but 6-18 months of weak capital deployment would keep BRK.B lagging unless management proves the cash can be converted into earnings power.

Key Decisions for Investors

• Underweight BRK.B versus SPY over the next 3-6 months; the expected return spread is limited unless Berkshire announces meaningful deployment, while the cash drag becomes more visible if rates trend lower.
• If the goal is Apple exposure, prefer AAPL directly over BRK.B; it is the cleaner expression on operating upside and avoids the conglomerate discount and cash-drag overhang.
• Use any sharp BRK.B rally to trim exposure rather than chase it; the thesis weakens only if Berkshire deploys more than roughly $20B-$30B into accretive buybacks or acquisitions.
• Set an alert on AAPL if the multiple compresses meaningfully from here; that would be the main way BRK.B loses its largest return engine and would justify a larger BRK underweight.