How many employees work at Ionis Pharmaceuticals?
Ionis Pharmaceuticals, Inc. has 1,412 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is 22.9%.
Data source: Revelio Labs Coverage: Global workforce Latest update: December 2025
About Ionis Pharmaceuticals
For more than 30 years, Ionis has been a leader in RNA-targeted therapy, pioneering new markets and changing standards of care. Ionis currently has four marketed medicines and a promising late-stage pipeline highlighted by cardiovascular and neurological franchises. We are guided by world-class scientists and business leaders whose great passion for innovation is equaled only by their focus and commitment to discover, develop and deliver medicines to the patients who depend on us.
As of December 2025
Ionis Pharmaceuticals
workforce metrics
Headcount
1.4k
Avg. Salary
$179.9k
Tenure
3.6yr
Growth Rate
22.9%
Hiring Rate
Attrition Rate
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Employee Headcount
Interactive chart of Ionis Pharmaceuticals annual worldwide employee count from 2023 to 2025.
- Ionis Pharmaceuticals total number of employees in 2025 was 1,412, a 22.9% increase from 2024.
- Ionis Pharmaceuticals total number of employees in 2024 was 1,122, a 9.3% increase from 2023.
- Ionis Pharmaceuticals total number of employees in 2023 was 1,022, a 9.7% increase from 2022.
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Employee Geographic Breakdown
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Active Job Postings
Interactive chart of Ionis Pharmaceuticals annual active job postings from 2023 to 2025.
- Ionis Pharmaceuticals active job postings in 2025 was 54, a 51.2% increase from 2024.
- Ionis Pharmaceuticals active job postings in 2024 was 32, a 13.3% increase from 2023.
- Ionis Pharmaceuticals active job postings in 2023 was 28, a 71.3% decline from 2022.
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Employee Sentiment
Sentiment Topics
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