Warren Buffett's Berkshire Hathaway Just Bought Google Stock. Should You?

Berkshire Hathaway disclosed a purchase of 17.8 million Alphabet Class A shares in Q3 — a stake worth nearly $5 billion — sending Alphabet shares up more than 3% on Monday; the trade is notable because Berkshire typically favors undervalued, slow-growth businesses while Alphabet is a high-flying “Magnificent Seven” tech stock that is up about 50% year-to-date. The move comes as analysts have become more bullish after Alphabet’s stronger-than-expected Q3 results (JPMorgan and Wedbush raised targets), Visible Alpha shows 11 of 14 analysts rate the stock a buy with an average target of $324 (roughly 14% above Monday’s close), and the company raised full-year capex guidance to over $90 billion to expand AI-focused data centers — a strategy investors are watching for returns. Berkshire also remains a large Apple holder (about $65 billion historically) but trimmed that position by roughly 15% last quarter, underscoring a shift in its tech allocations.

Analysis

Berkshire Hathaway disclosed a Q3 purchase of 17.8 million Alphabet Class A shares, a stake worth nearly $5 billion at Monday’s close, and Alphabet shares jumped more than 3% on the news. The purchase is notable because Berkshire historically favors slow‑growth, value names while Alphabet is a high‑flying Magnificent Seven stock that is up roughly 50% year‑to‑date, with most gains occurring after mid‑July.

Sell‑side sentiment has turned constructive after Alphabet’s better‑than‑expected Q3: JPMorgan raised its price target by 13%, Wedbush also raised its target, and 11 of 14 analysts tracked by Visible Alpha rate the stock a buy with an average target of $324 (about 14% above Monday’s close). Alphabet raised full‑year capex guidance to more than $90 billion to expand AI data centers and purchase chips, a move analysts view as reinforcing its AI exposure but one that increases near‑term cash outlays and places pressure on near‑term returns.

Berkshire’s move and recent analyst upgrades act as a meaningful sentiment catalyst and may signal institutional conviction, but they do not remove execution risk around AI investments or valuation risk after a large YTD run; Berkshire also trimmed its Apple stake by ~15% last quarter after holding roughly $65 billion in Apple, underscoring active portfolio reallocation. Investors should therefore watch AI capex execution, subsequent analyst revisions versus the $324 consensus, and any further large institutional flows that could amplify volatility.

Key Decisions for Investors

• Consider adding to Alphabet exposure selectively or modestly overweighting given the institutional endorsement and analyst upgrades, but scale in incrementally because the stock is up ~50% YTD and sensitive to valuation moves
• Monitor execution indicators closely: track capital‑expenditure cadence, AI data‑center buildouts, chip spend, margin and free‑cash‑flow trends and the next analyst revisions against the $324 average target
• If already long, consider taking partial profits or implementing hedges to protect gains given elevated capex, return‑on‑investment uncertainty and the potential for volatility from further institutional rebalancing