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Plaintiff

Ionis Pharmaceuticals, Inc.

Defendant

Arrowhead Pharmaceuticals, Inc.

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Arrowhead Pharmaceuticals, Inc., Counter Claimant Ionis Pharmaceuticals, Inc., Counter Defendant Ionis Pharmaceuticals, Inc., Counter Claimant Ionis Pharmaceuticals, Inc., Counter Defendant

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Ionis Pharmaceuticals, Inc. v. Arrowhead Pharmaceuticals, Inc.

2:25-cv-08609 | California Central District Court

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Division Los Angeles (Western Division)

Judge Judge Hernan D. Vera

Filed Sept. 11, 2025

Case Flags ACCO, (AGRx), AO120, DISCOVERY, and MANADR

Magistrate Magistrate Judge Alicia G. Rosenberg

Nature of Suit 830 Patent

Cause 35:271 Patent Infringement

Demand $9,999,000

Jury Demand Plaintiff

Last Updated: 12 hours ago

Filing Date	#	Docket Text
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Ionis Pharmaceuticals, Inc. v. Arrowhead Pharmaceuticals, Inc.

2:25-cv-08609 | California Central District Court

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