Washington, DC (CNN) Waymo, the self-driving arm of Google's parent company Alphabet, announced Monday that it has raised $2.25 billion in its first external round of funding. And, it said, it expects to raise even more money as it looks to scale and expand its business.

venture capital firm Andreessen Horowitz, auto parts supplier Magna and auto retailer AutoNation AN The investment was led by private equity firm Silver Lake Partners, the Canada Pension Plan Investment Board and the Mubadala Investment Company, the sovereign wealth fund of the United Arab Emirates. Other investors includedventure capital firm Andreessen Horowitz, auto parts supplier Magna and auto retailer. Alphabet also invested in the round.

Waymo did not disclose how much the investment currently values the company at.

But company CEO John Krafcik said the investment will enable the company to add key partners and grow its operations.

"With this injection of capital and business acumen, alongside Alphabet, we'll deepen our investment in our people, our technology, and our operations, all in support of the deployment of the Waymo Driver around the world," Krafcik said in a statement.

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