Top Competitors of Primark Matalan Retail Ltd. 13,531. $1.4B. River Island. 8,507. $1.2B. New Look Retailers Ltd. 15,451. $14.5B. Next PLC. 26,836. $5.7B. ... Arcadia Group Ltd. 11,904. $1.3B. ... Boohoo.com PLC. 5,720. $2.4B.