Ionis Pharmaceuticals (IONS): Eventide Asset Management, LLC opened a new position $45.5M

575K

Shares reported

0.71%

Disclosed portfolio weight

$45.5M

Reported value

Holdings as of

Dec 31, 2025

Filed

Feb 13, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Jan 12, 2026Company filing · Form 8-K · ResultsReported its results

What came next

1. Feb 25, 2026Company filing · Form 8-K · ResultsReported its results
2. Mar 3, 2026Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On March 3, 2026, B. Lynne Parshall, a member of the Board of Directors (“ Board ”) of Ionis Pharmaceuticals, Inc. (the “ Company ”), and member of the Compliance Committee and Finance Committee of the Board, notified the Company that she will be retiring from the Board at the end of her current term and not seeking re-election at the Company’s 2026 Annual Meeting of Stockholders (the “ 2026 Annual Meeting ”).”
3. Apr 29, 2026Company filing · Form 8-K · ResultsReported its results
4. Jun 4, 2026Company filing · Form 8-K · Executive change, Shareholder voteChanged a top executive or board member, and held a shareholder vote (and 1 more item)“On June 4, 2026, the Board of Directors (“ Board ”) of Ionis Pharmaceuticals, Inc. (the “ Company ”) appointed Ludwig N. Hantson as a member of the Company’s Board effective June 4, 2026, immediately following the Company’s 2026 Annual Meeting of Stockholders.”

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for Ionis Pharmaceuticals

For Ionis Pharmaceuticals, OQRO holds 4 insider filings (SEC Form 4 or Form 144) and 1 fund holdings report (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its IONS page.

How this filing works

• SEC Form 13F

Other disclosures at Ionis Pharmaceuticals

• SEC Form 4Nov 13, 2026
• SEC Form 13F-HRNov 13, 2026
• SEC Form 4Oct 20, 2026
• SEC Form 4Oct 20, 2026
• SEC Form 144Oct 16, 2026
• SEC Form 13F-HRAug 14, 2026

Everything OQRO holds on this company is on its IONS page.