Semiconductor and laser company nLilght (LASR) shares surged almost 50% Thursday in its public debut on Nasdaq.

The company has a host of aerospace and defense customers, including Raytheon (RTN) , a holding of Jim Cramer's charitable trust, Action Alerts PLUS.

"In aerospace and defense, lasers are used in a broad range of applications," said nLight CEO Scott Keeney.

66% of nLight's revenue stemmed from customers outside of North America.

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