Pharma BD Deal Intelligence

Ionis Pharmaceuticals, Inc. / Akcea Therapeutics, Inc.

2020 · Acquisition/Merger · $500M · Complete

Outcome grade pending — assessed 5 years post-close.

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The coverage arc

Dec 04, 2019 Novartis Press Release Bullish

Novartis announced the initiation of Lp(HORIZON), a Phase 3 cardiovascular outcomes trial of TQJ230 (pelacarsen), an investigational antisense therapy…

Aug 31, 2020 SEC 8-K Filing — Ionis Neutral

On August 31, 2020, Ionis Pharmaceuticals, Inc. and Akcea Therapeutics, Inc. entered into an Agreement and Plan of Merger pursuant to which Ionis will acquire…

Feb 24, 2021 Ionis Q4 2020 Earnings Bullish

Ionis closed the Akcea acquisition on October 12, 2020, completing the tender offer at $18.15 per share for total consideration of approximately $500 million.…

Source summaries from our enrichment pipeline; follow links for originals.

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Ionis Pharmaceuticals announced acquisition of the remaining ~24% stake in Akcea Therapeutics it didn't already own at $18.15/share cash, ~$500M total. Brought Tegsedi, Waylivra, pelacarsen and other antisense programs fully back under Ionis. Tender offer completed October 2020. DEVELOPMENTS SINCE: The antisense pipeline that underpinned the buy-in has reshaped materially. Vupanorsen was discontinued in January 2022 after Pfizer reviewed Phase 2b TRANSLATE-TIMI 70 data — the non-HDL-C/triglyceride reduction was insufficient and the drug showed dose-dependent liver-fat and ALT/AST increases — and returned rights to Ionis. Tegsedi (inotersen) was withdrawn from the U.S. market in 2024 for low utilization (not safety/quality); it remains available ex-U.S. via Sobi (Europe) and PTC Therapeutics (Brazil). Waylivra (volanesorsen) never secured U.S. FDA approval (thrombocytopenia) and is marketed ex-U.S. only. The principal remaining upside, pelacarsen (Lp(a), partnered with Novartis), completed enrollment of the 8,323-patient Phase 3 Lp(a) HORIZON cardiovascular outcomes trial; Novartis guided topline data to the first half of 2026 (not yet publicly reported as of this review).

Did it work? Outcome assessment

Strategic verdict
Partially Achieved
Financial impact
Neutral
Pipeline outcome
Mixed

Key facts

Related deals — scored

DealYearValueOutcome
Ionis Pharmaceuticals, Inc. / Akcea Therapeutics, Inc. (this deal)2020$500M
Pfizer Inc. / FoldRx Pharmaceuticals201099
Abbott Laboratories / Knoll Pharmaceuticals (BASF Pharma)2000$6.9B95
Astra AB / Zeneca Group plc1998$35.0B94
Merck & Co. Inc. / Acceleron Pharma Inc.2021$11.5B90
Johnson & Johnson / Actelion Ltd2017$30.0B90
Eli Lilly and Company / Boehringer Ingelheim GmbH2011$444M89

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