The shares of Evgo jumped another 25% on Tuesday after the company revealed it is expanding its collaborations with General Motors Company and Uber Technologies.

The electric vehicle charging company announced to investors on Monday that it had received multiple grants in Pennsylvania. That statement, combined with the news about the infrastructure plan, helped EVgo's stock conclude the day up 34%.

The good news for EVgo investors continued on Tuesday, with the firm announcing that its fast-charging infrastructure build-out collaboration with General Motors, which is presently underway across the United States, will be expanded.

EVgo and GM earlier announced intentions to treble the network's capacity, with 2,750 charging stalls planned by 2025.

However, the businesses claimed they had expanded their intention to add additional 500 high-powered DC fast chargers in response to increased demand for charging infrastructure and new vehicles being delivered in the program's later years. This boosts the overall number of markets to 3,250 and expands the reach from 40 to 52.Charged EVs | EVgo simplifies pricing for the largest public fast charging  network in the US - Charged EVs

EVgo CEO Cathy Zoi commented, "We are happy to increase the scope of our work with GM - a tribute to our successful partnership."

While the GM news was enough to send the stock up, EVgo also announced that it is expanding its electric vehicle charging program for Uber's rideshare drivers.

Uber drivers will have more access to EVgo's network of over 800 public fast chargers as a result of the expanded partnership. New discounts and advantages for drivers will also be available, with the companies expecting that this will stimulate more EV use.

"The increased incentives from EVgo's program help drivers save money while also taking another step toward Uber being a zero-emissions platform," said Adam Gromis, Uber's Head of Sustainability Policy.

After the opening bell, EVgo stock soared to a high of $17.74.