Warren Buffett went a buying spree in late December, purchasing VeriSign stock in multiple sessions through Dec. 24.

Six blue-chip stocks aggressively backed by Warren Buffett are on sale on Wall Street as the year draws to a close, mainly due to broad economic factors and stock market fashion.

Despite Buffett overseeing stakes in nearly four-dozen securities, the lion's share of Berkshire's invested assets have been put to work in seven top ideas.

Warren Buffett, the iconic investor and chairman of Berkshire Hathaway (NYSE:BRK), is renowned for his timeless advice on wealth-building. What Happened: With a net worth of approximately $142 billion,

Key Takeaways At the end of the third quarter, Berkshire Hathaway's cash pile swelled to a record $325.2 billion.Warren Buffett scaled back Berkshire's stake in its largest holding, Apple, and trimmed its position in Bank of America and other long-held investments.