Slaughter and May and Freshfields Bruckhaus Deringer have the lead roles on Singapore’s Oversea-Chinese Banking Corp.’s $4.9 billion bid for Hong Kong-based lender Wing Hang Bank Ltd.

OCBC, Singapore’s second-largest lender by assets, announced it had reached agreement with a group of Wing Hang shareholders, including the family of chairman Patrick Fung and Bank of New York Mellon Corp., to acquire the 45 percent of shares they jointly own. The Singaporean bank has offered to acquire all Wing Hang shares for around $16 each.