Nvidia's record revenues boost its valuation while Berkshire Hathaway backs Google amid changing AI investment landscape

The US microchip powerhouse Nvidia, now the world’s most valuable publicly listed company, has once again demonstrated its dominance in the technology sector by posting record revenues of $57 billion in the third quarter of 2025. This figure not only surpassed Wall Street estimates but also marked a 62% year-over-year increase, buoyed largely by surging demand for its GPUs, particularly the highly acclaimed Blackwell and Blackwell Ultra platforms. Nvidia anticipates revenues to climb further to $65 billion in the final quarter of the year, reflecting continued robust growth driven by its AI and data centre technologies. The company’s remarkable performance helped it become the first publicly traded entity valued over $5 trillion, eclipsing other tech giants such as Alphabet, Amazon, Apple, Tesla, Meta, and Microsoft. Following the earnings release, Nvidia’s shares surged more than 5% in after-hours trading to $196.

This stellar financial result has reassured investors nervous about the sustainability of the explosive growth in artificial intelligence, quelling fears of an imminent AI bubble burst. However, the evolving investment landscape revealed contrasting moves among high-profile investors over the same period. Tech entrepreneur Peter Thiel’s hedge fund controversially exited its Nvidia holding in the third quarter, liquidating over half a million shares worth around $100 million. In a striking counterpoint, Warren Buffett’s Berkshire Hathaway took a substantial $4.3 billion stake in Alphabet, Google’s parent company, indicating a clear vote of confidence in Google’s ability to capitalise on the AI revolution.

Berkshire Hathaway’s move is particularly noteworthy given Buffett’s longstanding cautious stance on technology stocks. Despite his reputation for backing companies with durable competitive advantages or “economic moats” , businesses capable of fending off competitors over long periods , Buffett has historically been sceptical about tech investments, famously struggling with picks like IBM a decade ago. Yet this latest acquisition signals a nuanced strategic pivot, appreciating Alphabet’s entrenched market power and resilience.

Google’s moat, built from its revolutionary search algorithm and skilfully developed business model centred on free search and monetised through targeted advertising, continues to generate tens of billions of dollars annually. Moreover, Google’s adept navigation of complex intellectual property laws and regulatory challenges worldwide has fortified its market dominance, making it less vulnerable to competitive disruption. These advantages, described metaphorically as “alligators in Google’s moat,” are seen by Berkshire Hathaway as crucial assets in an era when generative AI is reshaping the way people access information. Google’s ability to safeguard its brand and adapt to emerging AI-driven paradigms likely underpins Buffett’s confidence.

Speculation abounds that Berkshire’s investment could be a prescient indicator of where sustained digital profits may lie as Buffett prepares to step down from his executive role. While some newer tech mega-caps like Nvidia embody exciting growth potential, they may be more susceptible to the risks of an AI market correction. In contrast, consumer-facing giants like Google and Apple have demonstrated robust resilience through previous economic downturns, including the 2008 financial crisis, the COVID crash, and the inflationary bear market of 2022.

Nevertheless, Google’s path is not without challenges. The company faces ongoing intellectual property concerns, regulatory scrutiny, and the evolving behaviour of younger users who increasingly seek information through AI tools or social media platforms rather than traditional search engines. Additionally, emerging technologies such as agentic shopping and recommender systems threaten to disrupt Google’s search-centric model, potentially bypassing it altogether.

Despite these risks, Alphabet’s vast advertising revenues, extensive experience since the dawn of the commercial internet, and capability to foster new user habits position it as a formidable player in the AI economy. Berkshire Hathaway’s bet appears less about chasing ephemeral trends and more about anchoring its portfolio in companies with enduring competitive moats, precisely the kind of durable assets Warren Buffett has championed throughout his legendary investing career.

The contrasting investment activities surrounding Nvidia and Alphabet illuminate diverse investment philosophies grappling with the rapidly shifting terrain of AI-driven tech markets. Nvidia’s immediate, spectacular growth exemplifies cutting-edge innovation and demand-side dynamism, while Berkshire’s strategic positioning in Alphabet reflects prudent long-term confidence in established market moats. As Nasdaq watchers and AI enthusiasts continue to scrutinise this story, these developments highlight the complex interplay between innovation exuberance and seasoned investment wisdom.

Disclaimer: This article is for general informational purposes only and does not consider individual financial circumstances or objectives. It should not be construed as financial advice. All investments carry risks.