 Used-car e-commerce company Vroom Inc. said Wednesday it has upsized an offering of convertible bonds due 2026 to 550 million from a prior 500 million and priced the offering at 0.750. The initial conversion rate is 17.8527 shares of common stock per 1,000 principal amount of notes, which represents an initial conversion price of approximately 56.01 per share of common stock, the company said in a statement. 