Alphabet has overtaken Apple to become the second most valuable company in the world after reaching a market valuation of $4 trillion, marking a major moment for Google’s parent company. The milestone was achieved on Monday as Alphabet’s share price climbed sharply, reflecting renewed investor confidence in the company’s artificial intelligence strategy and long term growth prospects. This achievement places Alphabet among a small group of global corporations to reach the $4 trillion mark, following Nvidia, which later crossed $5 trillion, as well as Microsoft and Apple.
The surge in Alphabet’s valuation came shortly after Apple confirmed it had selected Google’s Gemini artificial intelligence model to power a significant overhaul of Siri, the digital assistant that comes pre installed on every iPhone. The announcement strengthened market sentiment around Alphabet’s AI capabilities, reinforcing its position as a leading provider of large scale AI models. While neither Apple nor Google disclosed the financial terms of the agreement, the strategic importance of the partnership was immediately reflected in Alphabet’s stock performance. In a statement shared with CNBC, Apple said that after careful evaluation it determined that Google’s technology provided the most capable foundation for Apple Foundation Models, underscoring the confidence Apple has placed in Gemini to support its next generation AI features.
Alphabet is now the fourth company to cross the $4 trillion valuation threshold, highlighting how rapidly market capitalizations have expanded among leading technology firms during the ongoing surge in artificial intelligence investment. Nvidia was the first to reach the milestone before extending its gains further, followed by Microsoft and Apple, which had previously traded places near the top of global market rankings. Alphabet’s move into second place reflects a shift in investor perception that has gathered pace over the past year, as the company has demonstrated stronger execution in AI development, cloud services, and monetization across its platforms. The valuation milestone also signals how central AI partnerships have become in shaping competitive dynamics among the largest technology companies.
The broader context remains one of intense debate on Wall Street. As technology stocks continue a multi year rise, concerns about market overheating and valuation bubbles persist. At the same time, enthusiasm for artificial intelligence as a driver of productivity, new products, and revenue growth continues to attract capital. Alphabet’s recent performance illustrates this tension clearly. The company’s stock rose by approximately 65 percent during 2025, outperforming other members of the so called Magnificent Seven, a group that includes Apple, Microsoft, Amazon, Nvidia, Meta, and Tesla. This outperformance suggests that investors increasingly view Alphabet as a primary beneficiary of enterprise and consumer AI adoption rather than a firm struggling to keep pace with rivals.
Alphabet’s rise has also reshaped its relationship with Apple in the eyes of investors. While the two companies remain competitors in several areas, their collaboration around Gemini and Siri demonstrates how strategic partnerships can coexist with rivalry in the current technology landscape. The decision by Apple to rely on Google’s AI model for such a core user facing feature has been widely interpreted as validation of Alphabet’s progress in large language models and applied AI. As market attention remains fixed on AI driven revenue opportunities, Alphabet’s $4 trillion valuation milestone reflects a notable change in sentiment toward a company once viewed as lagging behind in the race for artificial intelligence leadership.
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