Lime is raising a $300 million series-D financing round that increases its valuation to $2.4 billion. Scooter companies have seen skyrocketing growth in the past year as venture capital money pours into the space. Scooter rental startup Lime announced Wednesday it's raised $310 million in a series D financing round that boosts its already massive valuation to $2.4 billion. The announcement confirms earlier reports from Axios that the financial giant Fidelity was interested in investing in a scooter company. However, those reports said Fidelity was interested in Bird.