For shareholders of Sarasota-based Insignia Bank, the stock market’s so-called Trump Bump has meant an $11.6 million windfall.

Pompano Beach-based Stonegate Bank — which accepted a $778 million buyout offer Monday — agreed to acquire Insignialast summer in a deal that at that time represented $36.5 million in Stonegate shares, said Gregory K. Bader, a partner at the Gunster law firm who specializes in banking and financial services and represented Stonegatein the transaction.