OKEx has partnered with Ledger, Aliniex, Bvnex and Cryptomall to support its utility token OKB
Source: https://cointelegraph.com/news/okex-secures-support-from-four-new-partners-for-its-utility-token-okb
OKEx Secures Support From Four New Partners for Its Utility Token OKB
November 23, 2019
CoinTelegraph