BlackRock Inc.’s Mark Wiseman, who is the global head of active equities, is leaving the firm following a violation of the company’s relationships at work policy. The issue had no impact on any portfolios or client activities, BlackRock’s Chief Executive Officer Larry Fink and President Rob Kapito said in a memo to employees Thursday. In a separate memo, Wiseman said that he failed to disclose a consensual relationship with a colleague. “I regret my mistake and I accept responsibility,” he said.