Blume Ventures, which has backed unicorns like Ola and Unacademy, has raised its largest fund at over $250 million for startups. The VC, without disclosing names, said previous investors including family offices and sovereign wealth funds participated in fundraise. Co-founder Karthik Reddy told TechCrunch that the fund will back select pricier startups, those from second or third-time founders.