Ionis Pharmaceuticals, Inc. (IONS) Faces Investor Scrutiny After Surprise Trial Failure Drives Stock Down 23% – HBSS

SAN FRANCISCO, July 28, 2026 (GLOBE NEWSWIRE) -- Investors in Ionis Pharmaceuticals, Inc. (NASDAQ: IONS) saw the price of their shares plunge $20.19 (-23%) on July 9, 2026 after the commercial stage biotech company and its partner (AstraZeneca) announced that a late-stage trial for an experimental heart disease therapy did not meet its target.

The surprise result and severe market reaction have prompted national shareholders’ rights firm Hagens Berman to open an investigation into whether Ionis was sufficiently transparent about the trial’s data and design and, if not, whether the company may have violated the federal securities laws. The firm encourages Ionis investors who suffered substantial losses to submit your losses now.