** Alphabet GOOGL.O shares fall 2% to $369.00 in pre-market trading on Tuesday after co announced plans to raise $80 billion in equity offerings to fund its AI expansion

** The deal includes a $10 billion private placement to Berkshire Hathaway BRKa.N, seen as a high-profile endorsement of GOOGL's long-term AI and cloud strategy

** Co also plans a $30 billion public offering and a $40 billion at-the-market program, citing strong demand for its AI solutions that is exceeding available supply

** "Alphabet's $80 billion equity raise is a clear sign that the AI arms race is moving into a more capital-hungry phase, but the structure matters," said Matt Britzman, senior equity analyst, Hargreaves Lansdown

** GOOGL shares have rallied about 20.2% year to date, outperforming a 16.5% rise in the Nasdaq .IXIC over the same period