May Department Stores Co. Acquire Stake in Knot

May Department Stores Co. acquired a stake in the Knot to bolster the St. Louis-based department store’s bridal business. May’s 19.5 percent stake allows it access to the Knot’s online wedding-planning Web site. The action is the latest in a series of wedding apparel acquisitions by May that includes retailer David’s Bridal two years ago, After Hours Formalwear, a tux rental and sales business, last year and upscale bridal retailer Priscilla of Boston earlier this year.