Berkshire Sits on $365B Cash, Grows Its Alphabet Stake 6x

Berkshire Hathaway held $365.5 billion in cash, cash equivalents and short-term US Treasury Bills at 30 June 2026, by our sum of three lines in its 10-Q filed with the SEC. Its 13F filings show something else in the same six months: its Alphabet holding rose from 17.8 million shares at the end of 2025 to 106.0 million, about 6 times as many by our arithmetic.

We read the filings on 23 October 2026, after a Barchart post on X put Berkshire’s cash at $365 billion. A 13F is the quarterly SEC filing in which a large investor lists the US-listed stocks it holds at the end of each quarter.

Business Pill · CAPEX AND DEPRECIATION

A short Business Engineer explainer on capital spending and depreciation. It teaches the general idea only and says nothing about Berkshire or any company in this piece.

What the Filings Show

• The cash. Cash and cash equivalents of $35.1 billion, Treasury Bills of $324.9 billion and $5.5 billion of cash at the railroad, utilities and energy businesses add up to $365.5 billion at 30 June 2026, our arithmetic on the 10-Q shows. The same three lines came to $373.3 billion at the end of 2025.
• The Alphabet stake. Berkshire’s 13F lists 105,979,600 Alphabet shares worth $37.76 billion at 30 June 2026, against 17,846,142 shares worth $5.59 billion at 31 December 2025. Alphabet rose from 2.0% to 12.6% of the 13F value, our arithmetic shows.
• Apple is unchanged. The Apple holding stayed at 227,917,808 shares in both filings, worth $65.95 billion at 30 June, 22.0% of the 13F value.
• Top five. The 10-Q names Alphabet, American Express, Apple, Bank of America and Coca-Cola as Berkshire’s five largest holdings at 30 June 2026, at 66% of the fair value of its equity securities.

Source: Berkshire Hathaway Form 10-Q for the quarter ended 30 June 2026, consolidated balance sheet, filed 10 August 2026 on SEC EDGAR. The sum is our arithmetic. The 10-Q notes that the Treasury Bills line includes $771 million of unsettled purchases at 30 June 2026.

Source: Berkshire Hathaway 13F-HR filings for 31 December 2025 (filed 17 February 2026) and 30 June 2026 (filed 14 August 2026), SEC EDGAR, aggregated by issuer by FourWeekMBA on 23 October 2026. Shares of 13F value are our arithmetic. A 13F lists US-listed stocks held at the quarter end; it does not show when shares were bought.

What Was Posted on X

Barchart’s post on 22 October put Berkshire Hathaway’s cash at $365 billion, which it said was “enough to buy 472 companies in the S&P 500”; the 472-company count is Barchart’s own arithmetic.

What Was Posted on X

Barchart posted on X on 22 October that Berkshire Hathaway is now sitting on a staggering $365 billion in cash, enough to buy 472 companies in the S&P 500. The $365 billion matches our sum of the 10-Q lines above; the count of 472 companies is Barchart’s own arithmetic, which we did not check.

A BigGo Finance headline on 23 October read “Abel’s Berkshire Bets Big on AI: Apple, Alphabet and Bending Spoons Now Make Up 32% of $364 Billion Portfolio”. We could not match that figure to the filings: by our arithmetic, Apple and Alphabet were 34.7% of the $299.25 billion 13F value at 30 June, and no holding named Bending Spoons appears in the 13F or the 10-Q text we read.

Connecting the Coverage

Our CalPERS piece used the same 13F method and found that ten AI stocks fell to 22.4% of the value CalPERS reported at the end of June 2026. Our selloff piece reported that the AI stock selloff of 22 October moved US Treasuries, Japanese bonds, global credit spreads and gold, according to Reuters and Bloomberg. Our insurers piece reported that Moody’s counts about $85.2 billion of AI-related investments at US life insurers. What’s new: Berkshire’s own filings show both the cash and a much larger Alphabet holding.

The Structural Read

As we read it, both facts sit in the same six months: the three cash lines fell to $365.5 billion from $373.3 billion by our sum, and Investments in equity securities rose to $323.8 billion from $297.8 billion, the 10-Q shows.

As we read it, Berkshire’s AI exposure in the 13F runs through two names: Apple at 22.0% and Alphabet at 12.6% of the reported value, 34.7% together by our arithmetic; the filing lists no other holding among the big AI chip or cloud companies.

As we read it, the method matches our CalPERS piece: both read what the 13F lists at the quarter end, which shows holdings, not purchase dates or reasons.

Three Implications

FOR READERS TRACKING THE CASH The $365.5 billion is a 30 June 2026 figure; Berkshire’s 10-Q for the September quarter was not on EDGAR when we checked on 23 October.

FOR ALPHABET SHAREHOLDERS Alphabet was among Berkshire’s five largest holdings at 30 June 2026, with Apple, American Express, Bank of America and Coca-Cola, the 10-Q shows.

FOR READERS COMPARING HEADLINES Apple and Alphabet were 34.7% of the $299.25 billion 13F value at 30 June 2026 by our arithmetic, against the 32% of $364 billion in the BigGo Finance headline.

The Business Engineer Lens

This story maps onto the Business Engineer framework The AI Capex Map.

The framework describes the Big Four’s 2026 spending as “the largest single-year concentrated infrastructure cycle in the history of technology.”

As we read it, Berkshire now owns a larger slice of that cycle through Alphabet, one of the companies the framework covers, which is what its 13F filings show. The framework was published in May 2026 and does not discuss Berkshire.

What Is Not Established

The cash figure is at 30 June 2026; Berkshire’s 10-Q for the September quarter was not on EDGAR when we checked on 23 October, so the current figure may differ. A 13F shows shares held at the quarter end, not purchase dates or prices, and the filings do not say who at Berkshire made the Alphabet decision or why. Calling Alphabet and Apple AI-linked is our reading; Berkshire’s filings do not use that label. We did not contact Berkshire. Nothing here is investment advice.

The Bottom Line

Berkshire’s 10-Q lines add up to $365.5 billion in cash and Treasury Bills at 30 June 2026 by our sum, and its 13F filings show its Alphabet shares rising about 6 times in the first half, to 12.6% of its 13F value by our arithmetic.