The Biggest Stock Moves Warren Buffett's Berkshire Hathaway Made So Far This Year

Warren Buffett's Berkshire Hathaway is famous for its careful, long-term investment strategy. In 2026, the company made several significant portfolio moves that reflect Buffett's market insights and disciplined approach.

Understanding these moves can provide valuable lessons for investors aiming to align their strategies with one of the most successful investors in history. At the same time, knowing why the Oracle of Omaha made these changes can also give you perspective on where you stand financially and how to plan your own investment decisions.

In the second quarter of 2025, Berkshire Hathaway acquired over 5 million shares of UnitedHealth Group, amounting to approximately $1.6 billion. This move was unexpected, given the insurer's challenges, including a federal investigation over its handling of Medicare billing, as well as the resignation of the company's CEO.

Despite these headwinds, the investment sent UnitedHealth's stock price soaring almost 10% after-hours trading, highlighting Buffett's confidence in the company's long-term prospects.

Berkshire Hathaway closed out its entire position in T-Mobile US (TMUS) as of mid-2026, selling off a stake that had been worth around $1 billion. This move marked a complete exit from the telecommunications provider and reflected a strategic shift away from the sector.

The decision comes as Berkshire repositions its portfolio toward sectors like health care and industrials, signaling a renewed focus by Buffett on industries with greater perceived long-term stability.

After reducing its stake in Chevron in previous years, Berkshire Hathaway has re-entered the energy sector with renewed vigor. The company acquired 3 million shares of Chevron this year.

This decision highlights the company's confidence in the long-term value of energy investments, particularly in a world increasingly focused on energy security and sustainability.

In the second quarter of 2025, Berkshire Hathaway trimmed its Apple stake by approximately 20 million shares, valued at around $9.2 billion.

This move may suggest Buffett is capturing gains while maintaining Apple's status as one of the company's core holdings. The move reflects a balanced approach, realizing returns without exiting a company that continues to generate substantial value.

Berkshire Hathaway also reduced its position in Bank of America, selling around 26 million shares, reducing the company's holding in the bank to about 8%.

The pullback points to a calibrated shift away from heavy exposure in the banking sector. Still, Bank of America remains one of the company's largest financial investments, which highlights Buffett's continued confidence in its long-term prospects.

With Warren Buffett announcing his retirement as CEO by the end of 2025, Berkshire Hathaway is undergoing a significant leadership transition. Greg Abel, one of the company's longtime employees, will be the designated successor and is largely expected to maintain the company's investment philosophy. However, with a new person may come new ideas; Abel may introduce new strategies to adapt to evolving market conditions, which could impact the company next year.

When analyzing Berkshire Hathaway's investment activity to perhaps inform your own investing strategy, also consider Buffett's most famous pieces of advice when it comes to investing. 

When choosing which companies to invest in, Buffett emphasizes the importance of investing in businesses with a durable competitive advantage at a reasonable price. He advocates for a long-term investment horizon, advising investors to buy stocks and hold despite market cycles.

Buffett consistently warns investors against letting fear drive their decisions during volatile markets. He believes that reacting emotionally, especially by selling in a downturn, often locks in losses and undermines long-term growth.

Instead, Buffett urges patience and discipline, reminding investors that wealth is built by holding for the long term. This mindset reflects his broader philosophy that markets reward calm, steady hands rather than short-term reactions.

Berkshire Hathaway's strategic moves in 2026 reflect Warren Buffett's enduring investment principles and adaptability to changing market dynamics. For investors, these decisions offer insights into identifying opportunities and managing risks.

As Buffett prepares for his transition, the company's continued success will depend on maintaining its core values and adapting to new challenges. Understanding these strategies today can help you start investing with a more informed perspective tomorrow.