Neurosterix completes $105 million Series B financing, Addex’s stake diluted to 8.5%

Addex Therapeutics announced that its spin‑out Neurosterix closed a $105 million Series B round. Addex’s equity interest was reduced to an 8.5% stake valued at $18.6 million. The proceeds will fund Phase 2 development of NTX‑253, a muscarinic M4 positive allosteric modulator for schizophrenia. After the announcement, Addex shares jumped more than 110% in overnight trading.

The financing provides Neurosterix with capital to advance its lead schizophrenia program, which could create future upside for Addex as a shareholder (the company noted the stake value of $18.6 million). The market reaction, a 110.08% surge in Addex’s stock, reflects investor optimism about the program’s potential.

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