Ionis Pharmaceuticals (IONS): Polar Capital Holdings Plc added to its stake +34K shares

1.03M

Shares reported · +34K vs prior quarter

0.33%

Disclosed portfolio weight

$67.6M

Reported value

Holdings as of

Sep 30, 2025

Filed

Nov 14, 2025

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. Sep 12, 2025InsiderOfficer sold ~$110K of IONS shares in the open market
2. Oct 28, 2025Company filing · Form 8-K · Material agreementSigned an important agreement
3. Oct 29, 2025Company filing · Form 8-K · ResultsReported its results
4. Nov 11, 2025Company filing · Form 8-K · Material agreement, New debtSigned an important agreement, and took on new debt or obligations (and 2 more items)

What came next

1. Jan 12, 2026Company filing · Form 8-K · ResultsReported its results
2. Feb 25, 2026Company filing · Form 8-K · ResultsReported its results
3. 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 ”).”

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.