Meet the Genius Quantum Computing Stock Warren Buffett and Berkshire Hathaway Just Bought

Berkshire Hathaway disclosed a new Q3 stake in Alphabet acquired at roughly $200 a share (about 19x forward earnings), a move the company’s value-focused investors likely made for Alphabet’s strong, cash-generative core rather than its riskiest bets; Google search revenue rose 15% in Q3, aided by generative AI integration, and the company is also gaining momentum in AI and cloud. Alphabet’s quantum achievement—Google’s Willow chip ran a verifiable algorithm reportedly 13,000x faster than the world’s fastest supercomputer—illustrates a high-upside optionality, but the purchase aligns with Berkshire’s preference for durable businesses with predictable cash flows. The investment signals institutional confidence in Alphabet’s base-advertising cash engine and AI-driven growth catalysts, while long-shot projects like quantum and autonomous driving remain secondary potential upside.

Analysis

Berkshire Hathaway disclosed a new Q3 stake in Alphabet acquired at roughly $200 per share, which the article reports equated to about 19x forward earnings; the filing does not confirm whether Warren Buffett or his deputies Ted Weschler and Todd Combs placed the trade and notes Buffett is stepping down at year-end. The purchase is significant because Berkshire traditionally targets simple, cash-generative businesses, implying the position was driven by Alphabet’s core economics rather than speculative bets.

Alphabet’s advertising franchise remains the primary investment thesis: Google search revenue rose 15% in Q3, with integration of generative AI cited as a growth catalyst, and the company is gaining momentum in AI and cloud that could sustain above-market growth. Those durable cash flows fund optionality across long-shot projects while supporting valuation metrics consistent with value-oriented ownership.

Technical breakthroughs provide upside but are not yet transformational to near-term revenue: Google’s Willow quantum chip ran a verifiable algorithm reportedly 13,000x faster than the world’s fastest supercomputer, yet the article notes results remain classically verifiable and therefore speculative. The supplied signals show moderately positive sentiment (0.5) and modest market-impact (0.33), indicating institutional confidence in fundamentals but limited immediate market disruption.

Key Decisions for Investors

• Consider a selective buy or modest overweight in Alphabet to capture durable ad cash flows and AI/cloud momentum, sizing new exposure against your risk tolerance given Berkshire’s ~$200 entry (~19x forward earnings)
• Reassess current valuation relative to Berkshire’s reported ~19x forward multiple before adding; if present multiples exceed that materially, prefer phased purchases or partial trimming to manage upside expectations
• Monitor quarterly search/ad revenue trends and productized AI monetization metrics as the primary drivers of near-term upside, and treat quantum milestones (e.g., follow-on verifiable benchmarks beyond the Willow 13,000x result) as optional long-term upside rather than a revenue catalyst today
• Watch subsequent Berkshire filings and any public commentary about the stake or ownership changes given the management transition, as shifts in institutional positioning could create tactical trading opportunities or sentiment pressure