Press Release

Ionis Pharmaceuticals $575 Million Convertible Senior Notes Offering

June 14, 2023

San Diego – June 14, 2023 – Cooley advised Ionis Pharmaceuticals, a biotechnology company, in its $575 million aggregate principal amount of convertible senior notes. Partners Charlie Kim, Natalie Karam, Mischi a Marca and Jason Savich led the Cooley team.

Ionis will use proceeds from the notes to repurchase some of its 0.125% convertible senior notes due 2024, along with additional repurchases of the 2024 notes from time to time following the offering.

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