Key Takeaways
Berkshire Hathaway Inc.'s fiscal year 2025 (calendar year ended December 31, 2025) was the year that closed Warren Buffett's six-decade tenure as CEO and began Greg Abel's leadership of the world's most distinctive holding company structure: an integrated complex of approximately $1.1T in total assets generating operating earnings of approximately $48-52B and reported net earnings (which include unrealized investment gains/losses on the equity portfolio under GAAP) of approximately $80-110B depending on year-end equity market levels. The operating earnings — the metric Buffett historically emphasized as the meaningful indicator of business performance, separate from mark-to-market portfolio noise — derive from four major pillars: (1) the insurance group (GEICO, Berkshire Hathaway Reinsurance Group, General Re, Berkshire Hathaway Primary Group) which generates underwriting profit (~$8-12B in normal catastrophe years) and provides approximately $175B in insurance float that funds the rest of the operating businesses essentially interest-free; (2) BNSF Railway, the second-largest US Class I railroad, generating approximately $5-6B in pre-tax earnings on approximately $24B in revenue; (3) Berkshire Hathaway Energy (BHE), the diversified utility holding company that operates regulated electric and natural gas utilities in multiple states plus PacifiCorp's renewable energy and transmission infrastructure, generating approximately $4-5B in earnings; and (4) the Manufacturing, Service, and Retailing operations (Precision Castparts, Lubrizol, IMC International Metalworking Companies, Marmon Group, McLane Company, Berkshire Hathaway Home Services, See's Candies, Borsheims, NetJets, and dozens of other operating businesses) that generate approximately $12-14B in operating earnings collectively. The investment thesis for Berkshire in FY2026 is fundamentally about the leadership transition: Greg Abel, who became CEO at the end of 2025 after his appointment was made explicit in 2021, brings deep operating discipline (he ran BHE for two decades) but no comparable public investment record to Buffett's; the question for FY2026 is whether Abel deploys the approximately $325-360B cash and Treasury position that Buffett accumulated over FY2023-FY2025 (selling down Apple meaningfully and accumulating cash as equity valuations rose), and whether Charlie Munger's death in late 2023 plus Buffett's transition to Chairman (non-executive role) reshape the operating philosophy that has compounded book value at approximately 19% annually for sixty years.
Berkshire Hathaway was originally a Massachusetts textile company that Warren Buffett acquired control of in 1965 — a decision Buffett later characterized as a major capital allocation error because the textile business was structurally dying — and used as the corporate vehicle to acquire the diversified holding company structure that defines the modern Berkshire. The 1967 acquisition of National Indemnity (Berkshire's first insurance company) established the float-driven operating model that has compounded shareholder value: insurance customers pay premiums upfront, claims are paid over years or decades, and the time-shifted cash (float) is invested in equities, bonds, and operating business acquisitions while the insurance business provides essentially zero-cost financing. Across six decades, Buffett applied this float-funded compounding to assemble an extraordinary collection of operating businesses (acquired at favorable prices during periods of stress) and a public equity portfolio (Apple, Coca-Cola, American Express, Bank of America, Chevron, and others held with multi-decade conviction). Greg Abel, who joined Berkshire through the 2000 acquisition of MidAmerican Energy (where he served as CEO), expanded BHE into the multi-jurisdictional utility that it is today and was named Vice Chairman of Non-Insurance Operations in 2018 — a role that gave him oversight of all Berkshire operating businesses except insurance. Abel formally became CEO at year-end 2025; Buffett transitioned to non-executive Chairman; Ajit Jain remains Vice Chairman of Insurance Operations.
Business Structure
Berkshire reports through four primary segments plus a substantial equity investment portfolio.
Insurance Operations (~$95-105B revenue, ~$8-12B underwriting profit): GEICO (auto insurance, ~$45B premium volume, ~$3-4B underwriting profit), Berkshire Hathaway Reinsurance Group (BHRG — including National Indemnity, large reinsurance contracts), General Re (global reinsurance), Berkshire Hathaway Primary Group (specialty insurance lines). The combined float of approximately $175B funds the rest of Berkshire's operations and provides the structural advantage that distinguishes Berkshire from peer conglomerates.
Burlington Northern Santa Fe (BNSF) (~$24B revenue, ~$5-6B pre-tax earnings): Class I railroad operating approximately 32,500 route miles across the western and southern US. Diversified freight: consumer products (~33%), industrial products (~25%), agricultural products (~22%), coal (~10%), automotive (~10%). Acquired 2009-2010 for approximately $44B (one of Buffett's signature acquisitions); has generated cumulative earnings approaching $50B since acquisition.
Berkshire Hathaway Energy (~$26B revenue, ~$4-5B earnings): Regulated utility holding company including PacifiCorp (six-state electric utility serving Oregon, Washington, California, Idaho, Utah, Wyoming), MidAmerican Energy (Iowa electric/gas), NV Energy (Nevada electric/gas), Northern Powergrid (UK electric distribution), Northern Natural Gas (interstate gas pipelines), Eastern Energy Gas (interstate gas pipelines), BHE Renewables (utility-scale wind/solar), HomeServices of America (residential real estate brokerage). Greg Abel served as BHE CEO for approximately two decades before his elevation to Berkshire CEO.
Manufacturing, Service, and Retailing (~$170B revenue, ~$12-14B operating earnings): Aerospace components (Precision Castparts, $32B 2016 acquisition), specialty chemicals (Lubrizol), metalworking and cutting tools (IMC, the parent of Iscar acquired 2006), industrial holding company (Marmon Group), grocery distribution (McLane), confectionery (See's Candies), specialty retail (Borsheims, Helzberg Diamonds, R.C. Willey, Nebraska Furniture Mart), aviation (NetJets fractional jet ownership), residential building products (Clayton Homes, Acme Brick, Benjamin Moore paint), and dozens of other operating businesses.
Equity Investment Portfolio (~$280-340B fair value FY2025 year-end): Largest holdings include Apple (largest position, reduced significantly through FY2024 sales but still material — approximately $80-90B remaining position vs. approximately $175B at peak), Coca-Cola (long-held, $25-30B), American Express ($35-40B), Bank of America ($25-30B before significant FY2025 sales), Chevron ($15-20B), Occidental Petroleum ($13B), Kraft Heinz ($10B), Moody's ($8-10B), and approximately 40 other public equity positions of varying sizes.
Key Core Metrics Performance
Revenue, Operating Earnings, and Book Value (FY2021–FY2025)
| Fiscal Year | Total Revenue | Operating Earnings | Reported Net Earnings | Book Value/B-share | Cash & Treasuries |
|---|---|---|---|---|---|
| FY2021 | ~$276B | ~$27.5B | ~$90B | ~$326 | ~$144B |
| FY2022 | ~$303B | ~$30.8B | -$22B (mark-to-market loss) | ~$307 | ~$129B |
| FY2023 | ~$364B | ~$37.4B | ~$96B | ~$372 | ~$167B |
| FY2024 | ~$370B | ~$47.4B | ~$89B | ~$424 | ~$334B |
| FY2025 | ~$385B | ~$50B | ~$95B | ~$455 | ~$355B |
The cash and Treasury position increasing from $144B in FY2021 to approximately $355B by FY2025 reflects Buffett's deliberate decision to reduce equity exposure (particularly the Apple position) and accumulate fixed-income assets as US Treasury yields became attractive. This cash buildup is the most prominent capital allocation question facing Greg Abel in FY2026: deploy into equities, acquire operating businesses, or sustain the cash hoard until valuations become more attractive.
Operating Segment Earnings Mix (FY2025)
| Segment | Revenue | Pre-Tax Earnings | % of Operating Earnings |
|---|---|---|---|
| Insurance Underwriting | — | ~$8-10B | ~17% |
| Insurance Investment Income | — | ~$12-14B (Treasury rates supportive) | ~25% |
| BNSF Railway | ~$24B | ~$5-6B | ~12% |
| Berkshire Hathaway Energy | ~$26B | ~$4-5B | ~10% |
| Manufacturing, Service, Retailing | ~$170B | ~$12-14B | ~28% |
| Other (NetJets, real estate brokerage) | ~$25B | ~$3-4B | ~7% |
| Operating Earnings Total | — | ~$50B | 100% |
The diversification across insurance, transportation, utilities, and operating businesses is the structural quality that supports Berkshire's earnings durability — no single segment exceeds 30% of operating earnings, and the segments correlate weakly with each other (insurance underwriting cycles are independent of utility regulatory cycles, which are independent of railroad freight cycles).
Cash Deployment History (FY2022–FY2025)
| Year | Equity Purchases | Equity Sales | Net Position Change | Buybacks |
|---|---|---|---|---|
| FY2022 | ~$68B | ~$33B | +$35B (net buyer) | ~$8B |
| FY2023 | ~$30B | ~$36B | -$6B (net seller) | ~$9B |
| FY2024 | ~$10B | ~$143B (Apple-driven) | -$133B (massive net seller) | ~$2.5B |
| FY2025 | ~$8B | ~$30B | -$22B (continued net seller) | ~$0 |
The pattern of net selling — particularly the FY2024 Apple position reduction — combined with the suspended share repurchase program signals that Buffett judged most public equity opportunities (including Berkshire's own shares) as not attractively priced relative to their long-term value. Greg Abel inherits this conservative cash position at the moment of his CEO assumption.
Market Evaluation
Berkshire trades at approximately 1.5-1.7x book value and approximately 17-22x operating earnings — premium valuations relative to most peer conglomerates that reflect both the float advantage in insurance and the long-duration capital allocation track record. The bull case is Greg Abel deploying the cash effectively + operating business compounding: if Abel makes 1-2 large operating business acquisitions ($30-100B each) during FY2026-FY2027 at attractive prices (a market correction would create the opportunity Buffett historically waited for), book value compounding could continue at low-double-digit rates. The bear case is value-destruction risk + Buffett discount fading: Abel's track record is operational excellence at BHE but not market-tested public-equity capital allocation; if Abel deploys cash into equities or acquisitions at less-than-Buffett prices, the historical conglomerate premium could compress as investors discount the absence of Buffett's specific judgment.
The Float Engine and the Cash Deployment Question
Berkshire's structural competitive advantage rests on the insurance float — approximately $175B as of FY2025 — that funds operations at essentially zero cost (and arguably negative cost when underwriting is profitable). Insurance customers pay premiums upfront; claims are paid out over years or decades depending on the line of business (auto claims short-tailed, reinsurance for catastrophic events long-tailed). The float — the difference between premiums collected and claims paid — is invested in operating businesses, equities, and fixed-income assets. Each $1 of float generating 5% return (Treasury rate or operating business earnings yield) produces $0.05 of cash flow at zero capital cost — the equivalent of free leverage that compounds as the float grows.
The cash deployment question facing Greg Abel is not whether to deploy the cash but where: at $355B in cash and Treasury equivalents, Berkshire has the firepower to acquire any but the very largest US companies (the operating business hurdle is roughly $100-200B for a transformative acquisition) or to substantially increase equity exposure through opportunistic large positions. The historical Buffett model emphasized waiting for "fat pitches" — opportunities where the price-to-value ratio was clearly favorable rather than just acceptable. Abel's challenge is replicating this discipline: accepting periods of returning approximately Treasury yield (~5%) on cash rather than deploying capital into mediocre opportunities, which requires the institutional patience that Buffett established over six decades. The succession is the central FY2026-FY2028 narrative: whether Berkshire's cultural DNA of patient capital allocation survives Buffett's transition or whether market pressure for "putting cash to work" reshapes the company's approach.