Press Releases

- ARO-DIMER-PA achieved deep and durable silencing of two genes with a single RNAi molecule - Mean maximal single dose reductions in serum PCSK9 of 72% and APOC3 of 88% - Clinical validation further demonstrates Arrowhead’s position as the leading innovator in siRNA therapies - PASADENA, Calif.

PASADENA, Calif. --(BUSINESS WIRE)--Sep. 3, 2026-- Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today announced that it is scheduled to participate in the following upcoming investor events: 2026 Cantor Global Healthcare Conference – September 9-11, 2026 Type: Fireside Chat Presentation

- Plozasiran reduced triglycerides (TG) by 79% and 81% versus placebo in SHASTA -3 and SHASTA -4 across the broad sHTG population - - More than 90% of plozasiran-treated patients achieved triglycerides below thresholds for AP risk, 500 mg/dL at Month 12, and more than half achieved triglycerides

- Detailed results from the Phase 3 SHASTA-3 and SHASTA-4 Studies of Plozasiran in Patients with Severe Hypertriglyceridemia will be presented as a HOT LINE Late-Breaking Science Session on August 30, 2026 - - Arrowhead will host a webcast to review ESC data and Q&A on August 31, 2026 - PASADENA,

REDEMPLO® (plozasiran) is listed in the Lauer-Taxe® database as an adjunct to diet to reduce triglyceride levels in adult patients with familial chylomicronaemia syndrome (FCS), diagnosed either based on clinical symptoms alone or confirmed with a genetic test People living with this rare disease

- Conference Call and Webcast Today, August 4, 2026, at 4:30 p.m. ET PASADENA, Calif. --(BUSINESS WIRE)--Aug. 4, 2026-- Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today announced financial results for its fiscal 2026 third quarter ended June 30, 2026.

- Voucher to be used to accelerate review of a planned sNDA for plozasiran in severe hypertriglyceridemia PASADENA, Calif. --(BUSINESS WIRE)--Aug. 4, 2026-- Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today announced that it has signed an agreement with an undisclosed third party to acquire a

PASADENA, Calif. --(BUSINESS WIRE)--Aug. 3, 2026-- Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today announced that as an inducement to entering into employment with the Company, on July 16, 2026, the Company’s Board of Directors approved “inducement” grants to 95 new employees under Rule

- Study completion anticipated in mid-2027 PASADENA, Calif. --(BUSINESS WIRE)--Jul. 27, 2026-- Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today announced that it has completed enrollment in the global Phase 3 YOSEMITE clinical trial of zodasiran, the company’s investigational RNA interference

Deep, durable, and consistent median triglyceride reductions of 79% and 81% from baseline in SHASTA -3 and SHASTA -4, respectively Statistically significant reduction in acute pancreatitis events versus placebo across the entire sHTG study population, with an unprecedented 100% event reduction in