https://www.universityofcalifornia.edu/infocenter/transfers-major can show you how competitive each major at each UC is for transfer admission. Note that the business major at UCB was highly competitive, with a 6% transfer admission rate and admitted transfer student 25th-75th percentile GPA range of 3.79-4.00. However, UCB business is competitive admission even for those who enroll at UCB as frosh (no frosh direct admission to business).