Ionis Pharmaceuticals Inc. filed SEC Form 8-K: Regulation FD Disclosure, Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

 

FORM 8-K

 

CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

 

Date of report (Date of earliest event reported):  September 2, 2025

 

IONIS PHARMACEUTICALS, INC.

(Exact Name of Registrant as Specified in Charter)

 

Delaware

(State or Other Jurisdiction of Incorporation)

 

2855 Gazelle Court

Carlsbad, CA 92010

(Address of Principal Executive Offices and Zip Code)

 

Registrant’s telephone number, including area code: (760) 931-9200

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

 

 

 

 

 

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (Section 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (Section 240.12b-2 of this chapter).

Emerging growth company          ☐

 

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.          ☐

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On September 2, 2025, Ionis Pharmaceuticals, Inc.  (“Ionis,” “we,” “us” or “our company”) issued a press release announcing positive topline results from the pivotal Phase 3 CORE and CORE2 studies of olezarsen in people with severe hypertriglyceridemia (“sHTG”).  A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

 

The information in this Item 7.01 and the exhibit attached hereto shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

 

 

On September 2, 2025, we announced positive topline results from the pivotal Phase 3 CORE and CORE2 studies of olezarsen in people with sHTG. In the studies, olezarsen demonstrated a highly statistically significant placebo-adjusted mean reduction in fasting triglycerides of up to 72% and a highly statistically significant reduction in acute pancreatitis events of 85% with favorable safety and tolerability. CORE and CORE2 make up the largest pivotal program for sHTG, with nearly 1,100 patients who were required to be on standard of care lipid-lowering therapy throughout the treatment period.

 

The CORE and CORE2 studies met the primary endpoint, with both 80 mg and 50 mg monthly doses of olezarsen demonstrating a highly statistically significant placebo-adjusted mean reduction in fasting triglyceride levels at six months:

1. Least-squares mean. 2. Least-squares mean difference of percent reduction in fasting triglycerides. 3. P-values are based on comparison between each olezarsen group and placebo group in percent reduction in fasting triglycerides.

 

Additionally, the studies met the secondary endpoint of reduction in acute pancreatitis events. Olezarsen demonstrated a highly statistically significant 85% reduction in events (p=0.0002) compared to placebo. This was a prespecified analysis of pooled olezarsen groups compared to pooled placebo groups across both studies at 12 months.

 

Olezarsen demonstrated a favorable safety and tolerability profile. Adverse events were generally balanced across treatment groups, and serious adverse events occurred less frequently in the olezarsen groups compared to placebo. Injection site reactions, which were mostly mild, were the most common adverse event and occurred more frequently in the olezarsen groups compared to placebo. More than 90% of patients who completed CORE and CORE2 chose to continue into the open-label extension study.

 

We plan to submit a supplemental new drug application (sNDA) to the U.S. Food and Drug Administration by end of year. Detailed data will be presented at an upcoming medical conference.

 

Forward-Looking Statements

 

Certain statements contained in this report are forward-looking statements that involve a number of risks and uncertainties. Such forward-looking statements include, without limitation, statements regarding Ionis’ business, the therapeutic and commercial potential of olezarsen, our commercial medicines, additional medicines in development and technologies, and Ionis’ expectations regarding development and regulatory milestones. Words such as “anticipate,” “believe,” “could,” “continue,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would” and similar expressions are intended to identify forward-looking statements, though not all forward-looking statements necessarily contain these identifying words. For such statements, Ionis claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. Actual events or results may differ materially from Ionis’ expectations. Factors that could cause actual results to differ materially from the forward-looking statements include, but are not limited to, risks and uncertainties including 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. Additional factors that could cause actual results to differ materially from those stated or implied by Ionis’ forward-looking statements are disclosed in Ionis’ filings with the Securities and Exchange Commission, including in the section captioned “Risk Factors” in Ionis’ most recent Annual Report on Form 10-K and subsequently filed Quarterly Reports on Form 10-Q. These forward-looking statements represent Ionis’ judgment as of the time of this report. Ionis disclaims any intent or obligation to update these forward-looking statements, other than as may be required under applicable law.

 

 

(d) Exhibits.

SIGNATURE

 

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.