Ionis Pharmaceuticals, Inc.

Ionis Pharmaceuticals, Inc.

IONSยทNASDAQ

$73.82

+1.2%
HealthcareBiotechnology

Ionis Pharmaceuticals, Inc. discovers and develops RNA-targeted therapeutics in the United States. The company offers SPINRAZA for spinal muscular atrophy (SMA) in pediatric and adult patients; TEGSEDI, an injection for the treatment of polyneuropathy of hereditary transthyretin-mediated amyloidosis in adults; and WAYLIVRA, a treatment for familial chylomicronemia syndrome and familial partial lipodystrophy. It also develops medicines for various indications that are in phase 3 study, including Eplontersen as a monthly self-administered subcutaneous injection to treat all types of TTR amyloidosis; Olezarsen for patients with severe hypertriglyceridemia (SHTG); Donidalorsen for patients with hereditary angioedema; ION363 for patients with amyotrophic lateral sclerosis; Pelacarsen for patients with established cardiovascular disease and elevated lipoprotein(a); and Tofersen to inhibit the production of superoxide dismutase 1. In addition, the company develops medicines for metabolic diseases, infectious diseases, renal diseases, ophthalmic diseases, and cancer. It has a strategic collaboration with Biogen Inc.; and collaboration and license agreement with AstraZeneca, Bayer AG, GlaxoSmithKline plc, Novartis AG, Roche, Janssen Biotech, Inc., and Flamingo Therapeutics, Inc. Ionis Pharmaceuticals, Inc. was founded in 1989 and is based in Carlsbad, California.

At a Glance

Live Snapshot
Market Cap$12.20B
EPS-2.3800
P/E Ratio-31.02
Earnings Date07/29/2026

SEC Filings

IONS - Filing history and reports

Filing TypeFiling DatePeriod EndingFiscal YearActions
8-K

8-K 2026

N/A

May 28, 2026
May 28, 2026
2026
10-Q

10-Q 2026 Q1

Q1

April 29, 2026
March 31, 2026
2026
8-K

8-K 2026

N/A

April 29, 2026
April 29, 2026
2026
DEF 14A

DEF 14A 2026

N/A

April 23, 2026
June 04, 2026
2026
8-K

8-K 2026

N/A

April 21, 2026
April 21, 2026
2026
8-K

8-K 2026

N/A

March 09, 2026
March 03, 2026
2026
10-K

10-K 2025 FY

FY

February 26, 2026
December 31, 2025
2025
8-K

8-K 2026

N/A

February 25, 2026
February 25, 2026
2026
8-K

8-K 2026

N/A

January 12, 2026
January 12, 2026
2026
8-K

8-K 2026

N/A

January 07, 2026
January 07, 2026
2026
Showing 1 to 10 of 510 filings

Understanding SEC Filings

Essential regulatory documents for investors

SEC filings are mandatory documents that publicly traded companies must submit to the Securities and Exchange Commission. These reports provide critical insights into a company's financial health, operations, risks, and strategic direction. For investors conducting due diligence, these filings are the most authoritative source of company information.

10-K

Annual Report

Comprehensive annual financial report filed within 60-90 days of fiscal year-end. Includes audited financial statements, management discussion & analysis (MD&A), risk factors, and detailed business operations. The most thorough financial disclosure of the year.

Filed annually
10-Q

Quarterly Report

Unaudited quarterly financial report filed within 40-45 days after each of the first three fiscal quarters. Provides updates on financial position, results of operations, and significant events. Essential for tracking quarterly performance trends.

Filed 3 times per year
8-K

Current Report

Event-driven filing for material events that shareholders should know about, filed within 4 business days. Includes acquisitions, executive changes, bankruptcy, earnings releases, and other significant developments. Critical for staying informed about breaking news.

Filed as events occur
DEF 14A

Proxy Statement

Definitive proxy statement sent to shareholders before annual meetings. Contains executive compensation details, board member information, voting matters, and corporate governance policies. Key for understanding management incentives and board composition.

Filed before shareholder meetings
S-1

Registration Statement

Initial registration for securities offerings, including IPOs. Provides detailed company history, business model, financial statements, risk factors, and use of proceeds. Essential for evaluating new investment opportunities and understanding company fundamentals.

Filed for new offerings
20-F

Foreign Annual Report

Annual report for foreign private issuers, equivalent to Form 10-K for non-U.S. companies. Filed within 4-6 months of fiscal year-end. Contains audited financials, business description, and regulatory disclosures adapted for international companies.

Foreign companies only

Why SEC Filings Matter

  • Regulatory Accuracy: Filings are subject to SEC review and legal penalties for misstatements, ensuring high data quality
  • Management Insights: MD&A sections reveal management's perspective on trends, challenges, and future outlook
  • Risk Assessment: Detailed risk factor disclosures help investors understand potential threats to business operations
  • Competitive Analysis: Business descriptions and segment data enable comparison with industry peers
  • Historical Context: Years of filings provide trend analysis and context for current performance