4. Signet Corp. Parent company to the popular national jewelry chains, Kay Jewelers and Jared The Galleria Of Jewelry (it also runs two jewelry chains in the U.K.), each with their own signature television advertisements, Bermuda-based Signet ( SIG) seemingly has a heavy hand in the engagement ring and wedding band market. ("Every Kiss Begins With Kay," and "He Went To Jared," are two of the catchiest jingles on television.) Shares of Signet Jewelers have risen 27% in 2013, driven in part by the rebound in consumer spending on discretionary items. In its latest quarterly report, Signet saw a 6.4% increase in same-store sales and a 17.7% increase in earnings per share, fueled by strong Valentine's Day sales, it said in May. The company had a total of 1,952 stores, the majority of which are in the U.S. Signet pushed out its expectations for when its newly-acquired Ultra jewelry stores would be accretive to earnings to the end of the year. -- Written by Laurie Kulikowski in New York. Follow @LKulikowski To contact Laurie Kulikowski, send an email to: Laurie.Kulikowski@thestreet.com. >To submit a news tip, email: email@example.com. Follow TheStreet on Twitter and become a fan on Facebook.