Dec 27 (Reuters) - Gilead Sciences (GILD.O) will buy all the remaining rights for an experimental cancer therapy, GS-1811, from Jounce Therapeutics (JNCE.O) for $67 million, the drugmaker said on Tuesday.
Shares of Jounce more than doubled to $1.68, while Gilead's shares fell marginally in after market trading.
In 2020, the drugmakers had agreed to collaborate on development of GS-1811, when Gilead made an upfront payment of $85 million to Jounce.
Under the initial terms, Jounce was eligible to get up to $685 million in milestone payments from Gilead, of which it has received $40 million so far.
With the amendment, Jounce will no longer receive the remaining milestone payments or any of the sales-based royalties for the therapy.