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ARWRBullishIndustry NewsShort Term

High materiality9/10

Arrowhead Pharmaceuticals Reports Topline Results from Phase 3 SHASTA-3 and SHASTA-4 Studies of Plozasiran in Patients with Severe Hypertriglyceridemia

StockNews.AIJul 22, 7:30 AM EDT1 source

Trading thesisImportance 9/10

Bullish; ARWR likely to rally ahead of US sNDA timing and ESC catalyst into late-2026.

AI summary

What happened and why it matters

Arrowhead reported topline Phase 3 results for plozasiran in severe hypertriglyceridemia, showing deep triglyceride reductions and fewer acute pancreatitis events with favorable safety. TG reductions reached 79% and 81% at 12 months, while pancreatitis events declined 78% overall and 100% in the highest-risk group. The company plans a U.S. sNDA by year-end 2026 with ESC data presentation on August 30, 2026, signaling a clear regulatory and commercial pathway ahead.

Phase 3 topline data show major triglyceride reductions and pancreatitis risk drop.
US sNDA targeting end-2026 creates near-term regulatory catalysts.
ESC Late-Breaker presentation on Aug 30, 2026 provides additional near-term momentum.
Sanofi holds Greater China REDEMPLO rights; potential monetization impact.

Sentiment rationale

Strength of Phase 3 data (large TG reductions, substantial AP risk reduction, favorable safety) plus imminent regulatory milestones (U.S. sNDA by end-2026 and ESC event) suggest a positive re-rating for ARWR, barring unforeseen safety or competitive developments.

Key facts

01
SHASTA-3/SHASTA-4: TG reductions of 79% and 81% at 12 months.
02
AP events reduced 78% across sHTG; 100% in high-risk subgroup.
03
Safety profile remains favorable; no new safety signals.
04
US sNDA for plozasiran planned before year-end 2026; ESC presentation Aug 30, 2026.
05
Sanofi China rights to REDEMPLO; Arrowhead retains global rights elsewhere.

Industry News

Category: Industry News. The release centers on Phase 3 trial results and regulatory strategy for ARWR's pipeline, a classic industry catalyst with potential near-term price impact and longer-term commercial implications.