Lambert & Co. is working for GX Acquisition Corp. II blank check vehicle that is merging with NioCorp Developments Ltd, a miner of rare earth minerals.
The deal will raise $285M to develop NioCorp's Elk Creek mine, which has the second largest reserves of rare earth elements in the US.
The southeastern Nebraska mine has niobium, scandium and titanium reserves, which are vital for the production of electric vehicles and smartphones.
NioCorp CEO Mark Smith said the company's goal is to "rapidly build secure and reliable US supply chains of the critical minerals that multiple industries need to help us build a more sustainable and less carbon-intensive future."
China is the No. 1 producer of rare earth minerals.
The Elk Creek mine is expected to create about 450 permanent jobs and 1,200 construction jobs as it is developed over the next three years.
Lambert's Lisa Baker represents GXII.