Quad Partners is raising up to $150 million for its second fund, according to a regulatory filing. It already has secured over $47 million. The New York-based firm focuses on private equity investments in the education industry, and previously received LP commitments from such groups as Auda, CMS Companies, Goldman Sachs, HarbourVest, Landmark Partners, Merrill Lynch, Morgan Stanley and Partners Group and others. www.quadventures.com