---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-215939"
form_type: "8-K"
ticker: "IONS"
cik: "0000874015"
company_name: "IONIS PHARMACEUTICALS INC"
filed_at: "2024-09-09T23:59:59+00:00"
generated_at: "2026-05-31T05:59:45.616314+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "low"
source: SEC EDGAR
---

# Ionis proposes public offering of common stock; no size or price disclosed

## Summary
- Filed preliminary prospectus supplement on Sep 9, 2024 for a registered underwritten public offering of common stock.
- No specific number of shares, price range, or use of proceeds disclosed; offering subject to market conditions.
- Business update in supplement notes five marketed drugs, nine Phase 3 programs, and key milestones like olezarsen PDUFA Dec 19, 2024.

## SEC filing metadata
- accession: 0001193125-24-215939
- form_type: 8-K
- ticker: IONS
- cik: 0000874015
- company_name: IONIS PHARMACEUTICALS INC
- filed_at: 2024-09-09T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: low
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/874015/000119312524215939/0001193125-24-215939-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/874015/000119312524215939/d881331d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-215939
- JSON: https://secwatch.observer/filing/0001193125-24-215939.json
- Plain text: https://secwatch.observer/filing/0001193125-24-215939.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.