Warren Buffett spent six decades teaching investors that the hardest thing in markets is doing nothing. In his final shareholder letter before handing the CEO title to Greg Abel, he offered a masterclass in exactly that, explaining why Berkshire Hathaway was sitting on more than $325 billion in cash, cash equivalents, and short-term investments as of September 2025 and why he saw no reason to apologize for it.
The sum is staggering. It exceeds the entire market value of all but a few American corporations. And yet Buffett’s message was not that the sky was falling. It was simpler and, in some ways, harder to accept: when prices stop making sense, the rational move is to wait.
How the cash got this big
Berkshire’s quarterly filing with the Securities and Exchange Commission for the period ending September 30, 2025, lays out the arithmetic. Operating businesses kept throwing off strong earnings. But on the investing side, Berkshire was a heavy net seller of publicly traded stock.
The most conspicuous move was Apple. Once Berkshire’s largest equity holding by market value, the position was trimmed dramatically over several quarters in 2024 and into 2025. A comparison of Berkshire’s 13-F filing for Q4 2023 with subsequent filings through 2025 shows the company reduced its Apple stake by roughly three-quarters, banking tens of billions in proceeds. Buffett never publicly confirmed what drove the sales, though Apple’s elevated valuation drew widespread speculation.
Meanwhile, share repurchases slowed to a near halt. Berkshire’s longstanding buyback policy requires that shares trade below Buffett’s estimate of intrinsic value and that the company hold at least $30 billion in cash. The stock price climbed steadily through 2025, shrinking the margin Buffett was willing to act on. Cash flowed in faster than it flowed out, quarter after quarter.
An earlier 10-Q from March 2024 shows the buildup was already well underway. The filing reported more than $150 billion in Treasury bills specifically, though Berkshire’s broader short-term investment holdings were larger still. With short-term yields running above 5% for much of 2024 and into 2025, the pile was generating meaningful income on its own. But income was never the point. The point was optionality: the ability to write a very large check on short notice if the right deal appeared.
The case against chasing what’s hot
Buffett used the letter to revisit a warning he has issued in various forms since the 1990s: buying assets primarily because they are rising in price is one of the surest paths to permanent capital loss. He did not name specific stocks or sectors, but the letter arrived against a backdrop of stretched valuations in large-cap technology and a retail trading culture still drawn to momentum.
He framed Berkshire’s restraint as structural, not a market call. The company does not try to predict where stocks are headed next quarter. It tries to buy excellent businesses at prices that leave a margin of safety, and when those prices vanish, it sits on its hands. The $325 billion cash reserve, in Buffett’s telling, was not a bet against the market. It was the natural byproduct of standards that do not soften just because everyone else is paying up.
That distinction matters. Headlines often cast Berkshire’s cash buildup as a bearish signal, a legendary investor bracing for a crash. Buffett pushed back on that reading directly. He was not forecasting a downturn. He was explaining why a company with enormous resources had not yet found enough places to deploy them at prices that met his threshold.
Abel takes the reins
Greg Abel, whom Buffett named as his successor at the May 2025 annual meeting, has been careful to signal continuity since stepping into the CEO role. The exact timing of the formal handover has not been independently confirmed in public filings as of spring 2026. Reporting from the Associated Press captured Abel describing the cash reserve as prudent liquidity, not a defensive crouch, and praising Buffett’s stewardship of the balance sheet.
Abel was blunt about Berkshire’s intentions: the company has not lost its appetite for deals. Subsidiaries continue to invest in capital projects, and the door remains open for large acquisitions. But he echoed Buffett’s insistence that price discipline is non-negotiable. Shareholders heard the promise. Whether Abel delivers on it will be measured by what Berkshire actually buys in the quarters ahead, not by reassurances alone.
What the filings show, and what they leave out
SEC filings are the most reliable evidence available. The figures for cash, cash equivalents, short-term investments, operating cash flow, equity sales, and buybacks carry legal weight and are reviewed by independent auditors. When those documents show liquid assets climbing quarter after quarter, that is fact.
What the filings cannot reveal is the internal reasoning behind each trade. Berkshire does not publish the valuation models its investment team uses, and Buffett has historically declined to explain individual buy or sell decisions in real time. The gap between what the numbers confirm and what motivated each move remains a matter of informed speculation.
There is also a timing limitation. As of spring 2026, the most recent comprehensive data covers only the first nine months of 2025. Whether Berkshire continued building cash in the fourth quarter, or began deploying it, will not be confirmed until the annual 10-K is filed. Any year-end figure cited before that release is an estimate, not a verified number.
Patience as strategy, and its costs
For current and prospective Berkshire shareholders, the picture is straightforward in outline but uncomfortable in practice. The company is more liquid than at nearly any point in its history. Management is refusing to stretch on price or compromise on quality to stay fully invested. That discipline guards against overpaying in a richly valued market.
But it carries a cost. Cash and short-term Treasuries, even at yields above 5%, are unlikely to match the long-term returns of the operating businesses and equities Berkshire prefers to own. A sustained buildup of low-returning assets can slow per-share intrinsic value growth if attractive opportunities do not materialize.
Buffett has navigated this tension before. In the years leading up to the 2008 financial crisis, Berkshire’s growing cash hoard drew skepticism from investors who thought the company was falling behind. Then the crisis hit, and Berkshire deployed billions into Goldman Sachs preferred stock, General Electric, and eventually the $44 billion acquisition of Burlington Northern Santa Fe. Patience, in that case, paid off spectacularly.
Whether a similar window opens again is unknowable. What the verified record supports is a reading more nuanced than either alarm or complacency. Berkshire is demonstrably cautious, and its leaders are vocal about the dangers of speculative excess. But they have not abandoned equities or retreated from deal-making. They are waiting, with $325 billion in ammunition and a new CEO who says he intends to use it wisely. For Berkshire, that has always been the strategy. The question, as always, is whether the opportunity arrives before the patience wears thin.
