Question: Which other jewelry company does Kay Jewelers' owner have? 

Context paragraphs:
Reeds Jewelers: Reeds Jewelers is a U.S. retail jewelry company founded in 1946 by Bill and Roberta Zimmer in Wilmington, North Carolina.

Mel Bernie Company: The Mel Bernie Company, trading as 1928 Jewelry Company (and sometimes referred to simply as "1928 Jewelry") is a manufacturer and wholesaler of costume jewelry and novelties.  They also distribute their products directly to consumers through their website.

ULTRA Diamonds: ULTRA Diamonds was the largest seller of fine jewelry in factory outlet and value centers in the United States.  ULTRA was a manufacturer as well as a direct importer of diamonds, gemstones, and gold jewelry.  At one point, Ultra operated over 100 stores in outlet centers and 38 other format locations (primarily licensed jewelry departments).  After its acquisition by Signet Jewelers, ULTRA Diamonds stores were re-branded as Kay Jewelers.

Celine Engelstad: Celine Engelstad AS is a Norwegian jewelry company headquartered in Oslo, Norway.  The company was founded in 2007 by Celine Engelstad and Gunnvor Vik.  The company produces handmade unique jewelry.  They launched their first jewelry collection in October 2008.

Gianni Bulgari: Gianni Bulgari (born 1935) is an Italian jewelry designer, businessman and socialite.  He is a member of the Bulgari family of jewelers and led the Bulgari company from the 1960s into the 1980s.  After leaving the family business, he was the chairman of Fila from 1988 to 1998 and established his own luxury watchmaking and jewelry company GB-Enigma in 1989.

Antonio Z. Atienza, Jr.: Antonio Z. Atienza, Jr. (born August 30, 1959) is a Filipino jeweler.  As a manufacturer, exporter, and retailer of fine jewelry products, he is the owner of Goldenas Jewelry, Inc.  He is a member of the Guild of Philippine Jewelers, Inc.  The Guild's mission as a national organization is to promote the transformation and growth of the Philippine jewelry industry.

Sterling Jewelers: Sterling Jewelers, Inc. is an American specialty jewelry company headquartered in Akron, Ohio.  The company was founded in 1910 by Henry Shaw (the father of Jerry Shaw, the chairman emeritus of Sterling today), from LeRoy's Jewelers in Lorain, Ohio.  Sterling Jewelers is a wholly owned subsidiary of UK-based Signet Jewelers Limited (listed on the New York Stock Exchange under the symbol SIG), having been acquired in 1987.

Kranich's Jewelers: Kranich's Jewelers is a family owned jewelry store with locations in Altoona, State College and Johnstown Pennsylvania.  Kranich's Jewelers specialize in designer jewelry including many brands of designer watches.  Jewelry repair is available at each location.

Signet Jewelers: Signet Jewelers Ltd. (Ratner Group 1949-1993 then Signet Group plc to September 2008) is the world's largest retailer of diamond jewelry.  The company is domiciled in Bermuda and headquartered in Akron, Ohio, and is listed on the New York Stock Exchange.  As of 14th march 2016 the company has been delisted from the London Stock Exchange, following reports that less than 1% of their annual trading volume was conducted via the platform.  The group operates in the middle market jewelry segment and has number one positions in the U.S., Canada and UK speciality jewelry markets.  Certain brands (Jared in the U.S. and H. Samuel/Ernest Jones/Leslie Davis in the UK) operate in the upper middle market.  Signet Jewelers owns and operates the companies Zales, Kay Jewelers, and Jared.

Munnu Kasliwal: Munnu Kasliwal was a jewelry maker and late owner of the "Gem Palace" in Jaipur.  "Gem Palace" is lavish emporium, primarily containing intricate jewelry pieces.  His family served as the crown jewelers to country's Maharaja since the mid-18th century.  Kasliwal was born on July 7, 1958 in Jaipur, India.  Although not widely known such as Bulgari or Cartier, Kasliwal created jewelry for many celebrities including Nicole Kidman and Diana, Princess of Wales in 1992.  Kasliwal came from a long lineage of jewel craftsman and used traditional Indian and techniques.  He was inspired by the Mughal Empire, said to be his "Hallmark of Style".  Kasliwal attended Xavier's Secondary School.  He then attended the University of Rajasthan where he pursued a degree in Business Management.

Supporting paragraphs: ULTRA Diamonds Sterling Jewelers
Answer: Sterling Jewelers