Firefly Aerospace soared in its public market debut Thursday, beginning trading at $70, over 55% higher than its IPO price. The Cedar Park-based company secured a $9.8 billion valuation.

Firefly also boosted the size of the IPO. It will raise nearly $870 million from the stock sale. It is selling 19.3 million shares, up from an original proposal of 16.2 million shares. The stock will trade on the Nasdaq under the ticker symbol FLY.