What is IONS's dilution risk score?

IONS has a latest available DilutionScore record of 18/100, categorized as low dilution risk by the DilutionWatch scoring model. DilutionWatch displays SEC filing and dilution indicators for IONS, including shelf registrations, ATM offerings, warrant exercises, PIPE deals, and reverse split signals when detected in source data.

What SEC filings does DilutionWatch track for IONS?

DilutionWatch tracks 25 SEC filing types for IONS including S-3 shelf registrations, 424B prospectuses (ATM offerings), S-1 registration statements, 8-K material events, warrant exercise notices, convertible note agreements, and Form 4 insider transactions. Alerts are delivered via email within minutes of a filing appearing on EDGAR.

How does stock dilution affect IONS shareholders?

Stock dilution occurs when a company issues new shares, reducing the ownership percentage of existing shareholders. For IONS, common dilution events include at-the-market (ATM) stock offerings, shelf registration drawdowns, warrant exercises, and convertible note conversions. Each event increases the share count and can pressure the stock price lower.

Is DilutionWatch free for IONS tracking?

DilutionWatch provides a free tier that shows DilutionScores and basic filing history for IONS. Premium plans ($19.95/month Basic, $39.95/month Premium) unlock real-time email alerts, the full Pulse™ feed, advanced dilution forecasts, and access to all 10,000+ tracked tickers.

IONS Dilution Risk Score: 18/100 (LOW)

Score Breakdown

📋 Offering Ability

20

💰 Cash Runway

25

📊 Float Risk

7

⚠️ Warrant Exposure

15

🔄 Convertible Debt

15

Dilution Forecast

☀️

Clear

No significant dilution signals

model est. 0%

No significant dilution signals detected for IONS.

🔔 Track IONS — Get forecast alerts →

Market Data

Market Cap$12.64B

Shares Outstanding166.18M

Float163.98M

Cash$2.05B

Debt$1.76B

Short InterestN/A

Institutional Holdings

QoQ: ↑ 7.8% shares (2026Q1 vs prior)

496 institutional holders · 196.83M shares

#1 FMR LLC 24.56M shares

#2 Capital World Investors 21.19M shares

#3 VANGUARD CAPITAL MANAGEMENT LLC 14.24M shares

+ 17 more holders Sign up free to view →

Institutional holder totals are aggregated from ownership filings and may use a different share basis or reporting date than public float. They are not a reconciliation against tradeable float.

Short Interest

Short Interest21.47M

Days to Cover6.3

% of Float13.1%

FINRA data as of Jul 31, 2026

Insider Buy/Sell Ratio

Recent SEC Activity

xbrl XBRL CONVERTIBLE 2026-06-30

4 INSIDER TRANSACTION 2026-04-17

Full SEC filing analysis available with free account →

Recent News

No recent news

Factual IONS Dilution Snapshot

Ionis Pharmaceuticals, Inc. (IONS) has a DilutionScore of 18/100, rated Low dilution risk. Score date: August 28, 2026.

Recent SEC activity tracked for IONS: xbrl on 2026-06-30; 4 on 2026-04-17; 4 on 2026-04-17.

This automatically generated snapshot is assembled from stored DilutionWatch data fields and may contain data-source errors or omissions. It is not financial advice, not investment research, and not a recommendation. Do your own research and review the full disclaimer and terms of service.