WISeQey (WQEY) and SEALSQ's (LAES) Quantisimo quantum vertical platform has signed a deal to merge with blank-check firm GigCapital8 (GIW), the companies said Friday.

Under the agreement, Quantisimo and GigCapital8 will become wholly owned subsidiaries of a newly formed holding company, to be called Quantisimo Holding. WISeQey and SEALSQ will receive 66.6 million shares of the new holding company, implying a pro forma equity value for Quantisimo of about $666.1 million at $10 per share.

The deal includes a minimum cash condition of $15 million from GigCapital8's trust fund and any private investment, the companies said.

Shares of the combined company are expected to trade on the Nasdaq Capital Market under the symbol, "QSMO," with closing targeted for Q1 2027.