How many employees does Ionis Pharmaceuticals, Inc. have?

Ionis Pharmaceuticals, Inc. reported 1,402 employees for the fiscal year ending Dec 2025, in the annual report it filed on February 26, 2026. That is up 31.2% from a year earlier.

What is Ionis Pharmaceuticals, Inc.'s revenue per employee?

Ionis Pharmaceuticals, Inc. brought in $944M of revenue in fiscal Dec 2025, which is $673K per employee. That ranks 19 of 39 companies we track in Biotechnology, where the median is $602K.

Where do these numbers come from?

Employee counts and revenue are taken from each company's own annual report (Form 10-K). Open roles are counted from the company's public job board where we have matched one. Companies report headcount once a year, sometimes rounded, so small changes can be noise.

Company data

Ionis Pharmaceuticals, Inc. employees and revenue per employee

IONS · Biotechnology · $9.01B market cap

Ionis Pharmaceuticals, Inc. had 1,402 employees at the end of fiscal Dec 2025, up 31.2% from a year earlier. Revenue for the year was $944M, up 33.9% from a year earlier, or $673K per employee. Revenue and headcount both grew, and revenue grew faster.

Employees

1,402

+31.2% YoY

Revenue

$944M

+33.9% YoY

Revenue / employee

$673K

Peer median $602K

Rank in industry

19 of 39

Biotechnology

Headcount against revenue

Both lines start at 100 in the first year we hold, so you can see which one grew faster.

EmployeesRevenueIndexed to 100 in Dec 2016

Hover a year for the numbers.

IONS employees and revenue by fiscal year
Year ending	Employees	Revenue	Per employee	Staff YoY	Revenue YoY
Dec 2025	1,402	$944M	$673K	+31.2%	+33.9%
Dec 2024	1,069	$705M	$660K	+15.3%	-10.5%
Dec 2023	927	$788M	$850K	+16.5%	+34.1%
Dec 2022	796	$587M	$738K	+20.6%	-27.5%
Dec 2021	660	$810M	$1.23M	-12.8%	+11.1%
Dec 2020	757	$729M	$963K	-7.3%	-35.0%
Dec 2019	817	$1.12B	$1.37M	+10.9%	+87.2%
Dec 2018	737	$600M	$814K	+34.7%	+16.6%
Dec 2017	547	$514M	$940K	+25.7%	+37.9%
Dec 2016	435	$373M	$857K	—	—

Open roles: we have not matched a verified job board for this company yet.

Employees, last six fiscal years

Revenue per employee, last six fiscal years

Ionis Pharmaceuticals, Inc. against similar companies

The closest industry peers by revenue, from Biotechnology.

Company	Employees	Revenue	Revenue / employee	Shape
HALO Halozyme Therapeutics, Inc.	423	$1.40B	$3.30M	Efficient growth
BCRX BioCryst Pharmaceuticals, Inc.	435	$875M	$2.01M	Leaner
ARWR Arrowhead Pharmaceuticals, Inc.	711	$829M	$1.17M	Efficient growth
MDGL Madrigal Pharmaceuticals, Inc.	915	$958M	$1.05M	Efficient growth
AXSM Axsome Therapeutics, Inc.	925	$638M	$690K	Efficient growth
IONS Ionis Pharmaceuticals, Inc.	1,402	$944M	$673K	Efficient growth
TXG 10x Genomics, Inc.	1,178	$643M	$546K	Leaner
TECH Bio-Techne Corporation	3,000	$1.22B	$405K	Contracting
LEGN Legend Biotech Corporation	2,900	$1.03B	$355K	Efficient growth

Every Healthcare company

Questions about Ionis Pharmaceuticals, Inc.

How many employees does Ionis Pharmaceuticals, Inc. have?: Ionis Pharmaceuticals, Inc. reported 1,402 employees for the fiscal year ending Dec 2025, in the annual report it filed on February 26, 2026. That is up 31.2% from a year earlier.
What is Ionis Pharmaceuticals, Inc.'s revenue per employee?: Ionis Pharmaceuticals, Inc. brought in $944M of revenue in fiscal Dec 2025, which is $673K per employee. That ranks 19 of 39 companies we track in Biotechnology, where the median is $602K.
Where do these numbers come from?: Employee counts and revenue are taken from each company's own annual report (Form 10-K). Open roles are counted from the company's public job board where we have matched one. Companies report headcount once a year, sometimes rounded, so small changes can be noise.

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Compare IONS with the rest of the market

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Source: employee counts and revenue as stated in Ionis Pharmaceuticals, Inc.'s annual reports (Form 10-K), latest filed February 26, 2026. This is data, not a recommendation to buy or sell IONS.