Helix Biopharma Corp., of Richmond Hill, Ontario, closed a private placement of 682,000 units consisting of a share and a warrant to buy an additional share for C$1.20 per unit, grossing the company C$818,400 (US$627,631) that it will use for working capital and research and development activities. Shares of Helix (TSE:HBP) closed flat at C70 per share.