DoorDash, the food delivery company, announced on Thursday that it has raised $250 million from Coatue Management, DST Global, and several existing investors. The funding values the San Francisco company at $4 billion. It wasn’t so long ago that DoorDash raised a tidy sum—$535 million from SoftBank, Sequoia Capital, and Singapore’s GIC—in a Series D financing round, so it’s rather surprising that the company is back at it. “We do have the majority of our Series D money in the bank,” he acknowledged. “This was an opportunistic financing. We’ve had multiple inbound [inquiries].