Plaintiffs say CEO Jimmy Levin was paid $145.8 million in 2021.
Texas has no state income tax or capital-gains tax on individuals.
State data show South Dakota holds some half a trillion dollars of wealth in trusts.
Robinhood sold shares to investors late Wednesday for $38 apiece.
The bank aims to hire more than 500 advisors in coming years, bringing its total in the unit to 1,000.
The CEO was awarded 1.5 million stock appreciation rights that allow him to profit if the firm's share price rises.
Turnover rates and burnout among young workers are accelerating on Wall Street.
Melinda French Gates might not stay at the $50 billion foundation she built with her husband Bill.
Bill and Melinda Gates's divorce has thrown a spotlight on their money manager and its operation.
As office returns accelerate, some employees may want different options.