This is part of Schwab's merger with TD Ameritrade. Relevant bits from Schwab's FAQ [1]: Q: Where will the combined company be headquartered? A: As part of the integration process, the corporate headquarters of the combined companies will eventually relocate to Schwab’s new campus in Westlake, Texas. Both companies have a sizable presence in the Dallas-Fort Worth area. This will allow the firm to take advantage of th…
Also, afaik the merger is still in the prices of regulatory review.
All this being said, the merger likely gives a tactical opportunity to move HQ out of state without triggering a governmental review of some kind by pairing it with the merger event.