You know, watching what Warren Buffett does with Berkshire's portfolio in his final quarter as CEO always tells you something about where the smart money is thinking. The legendary investor just stepped down from the CEO role at the end of 2025, and his last moves before handing over to Greg Abel are pretty telling.

So here's what caught my attention: Berkshire was aggressively trimming its tech exposure in Q4. They dumped 7.7 million Amazon shares—basically a 77% exit from that position. Apple got cut too, down 4.3% of holdings, though it's still their largest single position at nearly 20% of the portfolio. And they unloaded roughly 50.8 million Bank of America shares, cutting that by 8.9%.

On the surface, it looks like Buffett and his team are getting defensive. But here's the thing—they weren't just sitting on cash. While pulling back from tech and financials, Berkshire actually piled into Chevron, buying over 8 million additional shares in Q4 and increasing their total stake by 6.6%. The energy giant now ranks as their fifth-largest holding at 7.6% of their public portfolio.

Why energy? This is where it gets interesting. The sector's become a legitimate defensive play against all the AI volatility we've been seeing in tech stocks. But more importantly, data centers are absolute power hogs, and that's driving real demand for energy infrastructure. Chevron's up 18% over the past year with dividend-adjusted returns around 22%, and it's currently yielding 3.9% forward.

The move makes sense when you think about who Warren Buffett is and how he's always operated—he looks for value and stability, especially when the market gets frothy. His last quarter shows he's not panicking, just repositioning. With Berkshire moving out of Bank of America and loading up on Chevron, there's a real chance energy becomes their fourth-largest holding sometime soon.

It's a classic Buffett move: sell what's overheated, buy what's undervalued and paying you to wait. Whether you follow that playbook or not, it's worth paying attention to what a legendary investor does when he's handing off the keys.