Fortress Balance SheetWide moat

Berkshire Hathaway (BRK.B) — moat facet

Cash to buy precisely when everyone else must sell — the fortress is an offensive weapon.

Beneath the diversified earnings sits a fortress balance sheet, and this is where the conglomerate structure turns from merely defensive to genuinely offensive. Berkshire deliberately keeps enormous reserves of cash and near-cash and carries strikingly little debt for its size, and while that caution costs a little in ordinary times, it pays off spectacularly in a crisis. When everyone else is a forced seller and prices are on the floor, Berkshire can buy — whole businesses, distressed securities, troubled enterprises — with cash in hand.

The balance sheet, 30 June 2026 ($B)Shareholders' equity$747.9BCash and T-bills$365.5BParent-level notes payable$43.3BBerkshire Form 10-Q, June 2026; cash consolidated incl. railroad and utilities
Parent-level debt is a rounding error beside the cash it could repay eight times over.

The strength is not just having money but having it when money is scarcest. In a panic, cash and courage are the rarest commodities on earth, and Berkshire is built to have both exactly when they are worth the most. It has, more than once, been the buyer of last resort to blue-chip companies desperate for capital, extracting excellent terms precisely because almost no one else could write the check. A fortress that lets you attack when others must defend is worth far more than its modest cost in good times.

The price of the fortress is a drag on returns in placid years. Vast holdings of low-yielding cash and bonds earn less than the businesses and stocks that money could otherwise buy, so Berkshire deliberately accepts lower average returns in exchange for the ability to pounce and the certainty of surviving anything. It is a conservative's bargain — give up some upside to be unbreakable — and exactly the trade a permanent institution should make, even if it frustrates those who would prefer $365.5 billion of cash and Treasury bills at the end of June 2026 work harder.12

Moat trajectory: Widening

Widening, quietly. The fortress has never been stronger: cash and Treasuries stand at a record near four hundred billion dollars, and higher interest rates now pay Berkshire handsomely to hold that firepower rather than costing it return. The larger and better-remunerated the war chest, the greater Berkshire's capacity to attack in the next crisis while others are forced to sell — which is the whole point of the fortress. Its defensive strength and its offensive optionality are both growing. Of Berkshire's moats, this is the one currently getting wider.

The number that tests this moat
Reported
Notes payable, insurance and other businesses
$43.3B at 30 June 2026, from $45.8B at end-2025

Parent-level debt is small against $365B of cash. Debt rising while cash falls would be the first sign of the fortress being used.

Source: Berkshire Form 10-Q, quarter ended 30 June 2026 ↗
⚠ Threats to the moat
⚠ THREAT 01
The Fortress Earns Fortress Returns
Being unbreakable means leaving money on the table every calm year.
References
  1. ReportedIt is a conservative's bargain — give up some upside to be unbreakable — and exactly the trade a permanent institution should make, even if it frustrates those who would prefer $365.5 billion of cash and Treasury bills at the end of June 2026 work harder.
    Berkshire Hathaway Form 10-Q, quarter ended 30 June 2026 - after-tax earnings (underwriting $1,731M vs $1,992M, insurance investment income $3,059M vs $3,367M, BNSF $1,558M vs $1,466M, BHE $891M vs $702M, manufacturing, service and retailing $4,470M vs $3,601M, investment gains $12,684M, net earnings $25,667M); GEICO pre-tax underwriting $994M vs $1,821M, combined ratio 91.2% vs 83.5%; Reinsurance $913M vs $650M; float $177.5B; insurance and other cash and Treasury Bills net $359.2B; consolidated cash $35,096M + $324,905M + $5,513M; equity securities $323.8B; H1 purchases of equities $39.4B and sales $27.8B; acquisitions of businesses net of cash $9.7B; $4.8B of treasury stock acquired in H1, most in Q2; OxyChem about $9.4B on 2 January; Taylor Morrison agreed 31 May at $72.50 a share, about $6.8B, closed 24 July; notes payable of insurance and other $43.3B; shareholders' equity $747.9B; BNSF revenue $6,601M vs $5,769M, fuel $1,173M vs $698M; BHE revenue $6,735M vs $6,418M; investment income down 9.1% on lower interest rates — Q2 2026 · publ. August 2026 · source ↗
  2. Moat Explorer calcIt is a conservative's bargain — give up some upside to be unbreakable — and exactly the trade a permanent institution should make, even if it frustrates those who would prefer $365.5 billion of cash and Treasury bills at the end of June 2026 work harder.
    Moat Explorer calculation from Berkshire's Forms 10-K FY2016-FY2025 and 10-Qs for Q1 and Q2 2026: operating earnings = net earnings less after-tax investment gains and the 2025 impairments (FY2023 $37,350M, FY2024 $47,437M, FY2025 $44,486M; Q2 2026 $12,983M vs $11,160M; H1 2026 $24,329M vs $20,801M); consolidated cash and Treasury Bills $397.4B (31 March 2026) and $365.5B (30 June 2026); underwriting as a share of float; OxyChem at 2.6% of the cash pile; five-line after-tax earnings sums — 2016 to Q2 2026 · publ. 2026-09-23 · source ↗
Sources
Generated September 23, 2026