Ionis and Metagenomi Gene Editing Collaboration

November 14, 2022

Nasdaq: IONS

On Today's Webcast

Brett Monia, Ph.D.

C. Frank Bennett, Ph.D.

Eric Swayze, Ph.D.

Executive Vice President,

Chief Executive Officer

Executive Vice President, Research

Chief Scientific Officer

Joe Baroldi

Beth Hougen

Executive Vice President,

Chief Financial Officer

Chief Business Officer

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Forward-Looking Statements

This presentation includes forward-looking statements regarding our collaboration and license agreement with Metagenomi, Inc., the therapeutic and commercial potential of genetic targets using gene editing technologies, Ionis' technologies, and Ionis' other products in development. Any statement describing Ionis' goals, expectations, financial or other projections, intentions or beliefs is a forward- looking statement and should be considered an at-risk statement. Such statements are subject to certain risks and uncertainties, including those related to the impact COVID-19 could have on our business, and including but not limited to those related to our commercial products and the medicines in our pipeline, and particularly those inherent in the process of discovering, developing and commercializing medicines that are safe and effective for use as human therapeutics, and in the endeavor of building a business around such medicines. Ionis' forward-looking statements also involve assumptions that, if they never materialize or prove correct, could cause its results to differ materially from those expressed or implied by such forward-looking statements. Although Ionis' forward- looking statements reflect the good faith judgment of its management, these statements are based only on facts and factors currently known by Ionis. As a result, you are cautioned not to rely on these forward-looking statements. These and other risks concerning Ionis' programs are described in additional detail in Ionis' annual report on Form 10-K for the year ended December 31, 2021, and our most recent Form 10-Q quarterly filing, which are on file with the Securities and Exchange Commission. Copies of this and other documents are available at www.ionispharma.com.

In this presentation, unless the context requires otherwise, "Ionis," "Company," "we," "our," and "us" refers to Ionis Pharmaceuticals and its subsidiaries.

Ionis Pharmaceuticals® is a registered trademark of Ionis Pharmaceuticals, Inc. Akcea Therapeutics® is a registered trademark of Akcea Therapeutics, Inc. TEGSEDI® is a trademark of Akcea Therapeutics, Inc. WAYLIVRA® is a registered trademark of Akcea Therapeutics, Inc. SPINRAZA® is a registered trademark of Biogen.

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Introduction

Brett Monia, Ph.D. Chief Executive Officer

Expanding the Reach of our Technology with Gene Editing Capabilities

Expands technology capabilities to address more diseases and more patients with unmet medical needs

Accelerates potential to deliver gene edited medicines

Focuses initially on validated liver targets while in parallel, exploring novel extra-hepatic targets

Moves us closer to becoming a leader in precision genetic medicines

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Ionis Pharmaceuticals Inc. published this content on 14 November 2022 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 14 November 2022 13:44:01 UTC.