FS Bancorp, Inc. is the holding company for 1st Security Bank, a community-oriented financial institution serving the Puget Sound, Tri-Cities, and select markets in Washington and Oregon through a network of full-service branches and loan production offices. The company operates a diversified lending platform encompassing commercial real estate, residential mortgages, consumer loans (particularly indirect home improvement financing across multiple states), and commercial business lending, while funding its operations through retail and commercial deposits and generating revenue primarily from net interest income on the spread between loan yields and deposit costs, supplemented by fees from loan sales, service charges, and mortgage servicing operations. The bank maintains credit discipline through disciplined underwriting concentrated in known markets and emphasizes building full customer relationships through cross-selling of deposits and banking services alongside its lending products.