Sergey Brin, a Google co-founder, rises in Forbes’ real-time billionaires rankings after fluctuations in Alphabet’s stock. One report says Brin climbs to become the 4th richest person, surpassing Microsoft founder Michael Dell, with his net worth changing by roughly tens of millions of dollars over a two-day period as Google shares fall. Another outlet reports Brin regains third place on the Forbes real-time list, moving back above Jeff Bezos and Michael Dell after being briefly pushed down to fifth. Both accounts link the ranking changes to share-price movements: Alphabet’s market value drops sharply, with one source citing about $255 billion erased in value in the largest one-day valuation loss in the company’s history, attributed in part to investor expectations about AI spending. The differing placements (third vs. fourth) reflect timing and ongoing stock-driven updates. Overall, the reports describe how rapid market swings directly affect billionaire net worth estimates and ranking positions on real-time lists.