Berkshire Hathaway Inc. (BRK-B) vs Lam Research Corporation (LRCX)

Berkshire Hathaway Inc. is a publicly traded diversified holding company with major businesses and investments across insurance, freight rail, energy, manufacturing, retail, and financial assets. Its shares give investors exposure to the operating performance of its subsidiaries as well as the value of its large public-equity portfolio. The company's performance is influenced by insurance underwriting results, investment returns, economic activity, interest rates, capital allocation, and broader market conditions.

Lam Research Corp is one of the world’s leading manufacturers of semiconductor wafer fabrication equipment. The company specializes in deposition and etch technologies, which involve building layers on a semiconductor wafer and selectively removing patterns from each layer. Lam holds the leading market share in etch and ranks a clear second in deposition. It has greater exposure to memory chipmakers, particularly in DRAM and NAND. Its major customers include some of the world’s largest semiconductor companies, such as TSMC, Samsung, Intel, and Micron.