Sarepta advances siRNA collaboration and sale of arrowhead equity investment

Sarepta advances siRNA collaboration and sale of arrowhead equity investment

By: IPP Bureau

Last updated : August 19, 2025 8:34 pm



Sarepta has also entered into an agreement with Arrowhead to transfer 2,660,989 shares of Arrowhead common stock in satisfaction of $50 million of the company’s previously announced $100 million milestone payment obligation


Sarepta Therapeutics, the leader in precision genetic medicine for rare diseases, announced that it has sold 9,265,312 shares of common stock of Arrowhead Pharmaceuticals, in a privately negotiated block trade, generating at least $174 million in gross proceeds.

In addition, Sarepta has entered into an agreement with Arrowhead to transfer 2,660,989 shares of Arrowhead common stock in satisfaction of $50 million of the company’s previously announced $100 million milestone payment obligation.

“We are very pleased with the progress of our potentially best-in-class siRNA programs, including the advancement of our SRP-1003 program for DM1, triggering the $100 million milestone payment to our partner, Arrowhead,” said Doug Ingram, president and chief executive officer, Sarepta.

“The sale of our equity investment is a strategic decision to help fund this milestone but does not change our conviction in the utility of the siRNA approach and our confidence in the work Arrowhead is doing to apply this technology across several disease states. We look forward to sharing early data from our FSHD and DM1 programs in the second half of this year.”

The $100 million milestone obligation was triggered following Arrowhead’s achievement of the first of two predetermined enrollment targets, and a review of safety data, in the Phase 1/2 clinical study of SRP-1003, an investigational RNA interference (RNAi) therapeutic for the treatment of type 1 myotonic dystrophy (DM1). Sarepta expects to release preliminary data from the Phase 1/2 study in the second half of 2025.

Sarepta Therapeutics precision genetic medicine rare diseases Arrowhead Pharmaceuticals

First Published : August 19, 2025 12:00 am