How many employees work at Illumina?
Illumina, Inc. (ILMN) has approximately 9,467 total employees worldwide as of December 2025, according to Revelio Labs workforce intelligence data. Illumina's total headcount has declined 13.9% from 11,000 employees in 2023 to 9,467 in 2025.
Data source: Revelio LabsCoverage: Global workforce, 2023–2026Published June 2026
Is Illumina hiring right now?
Yes, Illumina is actively hiring. Illumina had 378 active job postings in 2025, a 28.1% increase from 2024 — see job openings & hiring trends.
About Illumina's Workforce
Illumina, Inc. (ILMN) is a Biotech and Healthcare Services company that employs 9,467 people worldwide as of December 2025. It is the 6th-largest by headcount among its peers. Founded in 1998, the company is headquartered in San Diego, California and trades on the NASDAQ.
Illumina's workforce has declined 13.9% from 2023 to 2025, and is down 1.8% year over year in 2025. It fell to a low of 9,324 in 2025 Q3 before recovering. Its workforce is concentrated most in the United States (54.2%), followed by Singapore (12.3%) and the United Kingdom (8.1%), with India, its fastest-growing location.
Illumina's largest groups are Finance and Operations (43.8%), Engineering (35.7%), and Sales and Marketing (20.5%), with Engineering the fastest-growing at 1.0%. The average tenure is 4.1 years. The average salary is $120,934, with regional medians of $144,000 in Northern America and $19,000 in Southern Asia.
Illumina's hiring activity rose 28.1% in 2025 to 378 postings, with postings per month totaling 214 in 2025, 213 in 2024, and 233 in 2023. Overall, sentiment is negative and directionally downward.
Sourced from Revelio Labs workforce data.
As of December 2025
Illumina
workforce metrics
Headcount
9.5k
1.8% YoY
Avg. Salary
$120.9k
4.7% YoY
Tenure
4.1yr
0.3yr YoY
Growth Rate
-1.8%
2.7pts YoY
Hiring Rate
Attrition Rate
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Illumina. Compare to peers, export the dataset, and access the full quarterly history.
- Illumina had 9,467 employees in 2025, a 1.8% decline (-176) from 2024.
- Illumina had 9,643 employees in 2024, a 4.5% decline (-445) from 2023.
- Illumina had 10,088 employees in 2023, a 10.2% decline (-1,088) from 2022.
Illumina's total workforce has grown from 9,324 employees in 2025 to 9,467 in 2025. Illumina's headcount peaked at 11,000 in 2023 before declining in 2025 and recovering through 2025.
Illumina, Inc. — quarterly employee count (2023–2025)
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2025 | Q4 | 9,467 | -176 | -1.8% |
| 2025 | Q3 | 9,324 | -346 | -3.6% |
| 2025 | Q2 | 9,329 | -458 | -4.8% |
| 2025 | Q1 | 9,579 | -274 | -2.8% |
| 2024 | Q4 | 9,643 | -445 | -4.5% |
| 2024 | Q3 | 9,670 | -674 | -6.7% |
| 2024 | Q2 | 9,787 | -1,136 | -11.0% |
| 2024 | Q1 | 9,853 | -1,147 | -11.0% |
| 2023 | Q4 | 10,088 | -1,088 | -10.2% |
| 2023 | Q3 | 10,344 | -1,145 | -10.5% |
| 2023 | Q2 | 10,923 | -479 | -4.3% |
| 2023 | Q1 | 11,000 | +157 | +1.4% |
Want to see Illumina's complete headcount history back to 2017, including quarterly breakdowns?
The United States accounts for the largest share of Illumina's global workforce with approximately 54% of total employees, followed by Singapore and the United Kingdom. Illumina's headcount in India is growing fastest among its major locations, up 23.6% year over year in 2025.
Illumina employees by country — 2025
| Country | Employees | % of Total | YoY % |
|---|---|---|---|
| United States | 5,143 | 54.2% | -2.7% |
| Singapore | 1,167 | 12.3% | +0.6% |
| United Kingdom | 767 | 8.1% | -1.6% |
| India | 570 | 6.0% | +23.6% |
| China | 460 | 4.9% | +1.1% |
| Netherlands | 163 | 1.7% | +1.9% |
| Germany | 145 | 1.5% | +2.6% |
| Brazil | 142 | 1.5% | +9.0% |
| France | 102 | 1.1% | +9.1% |
| Australia | 87 | 0.9% | -8.1% |
Drill into city-level data, hiring trends by region and historic geographic shifts
Illumina's largest employee groups are Finance and Operations (43.8%), Engineering (35.7%), and Sales and Marketing (20.5%).
Illumina employees by department — 2025
| Department | Employees | % of Total | YoY % |
|---|---|---|---|
| Finance and Operations | 4,157 | 43.8% | -0.5% |
| Engineering | 3,394 | 35.7% | +1.0% |
| Sales and Marketing | 1,948 | 20.5% | -0.5% |
Compare Illumina's department mix to industry peers.
Illumina's average employee salary is $120,934 globally. Employees in Northern America receive the highest compensation, with median pay approximately 1.2x the global average. Pay is lowest in Southern Asia, at a median of $19,000.
Illumina median employee salary by region — 2025 (USD)
| Region | Median Salary |
|---|---|
| Northern America | $144,000 |
| Pacific Islands | $111,000 |
| Northern Europe | $105,000 |
| Western Europe | $98,000 |
| Arab States | $89,000 |
| South-Eastern Asia | $85,000 |
| Central and Western Asia | $72,000 |
| Southern Europe | $65,000 |
| Eastern Asia | $59,000 |
| Eastern Europe | $42,000 |
| Central America and the Caribbean | $31,000 |
| Sub-Saharan Africa | $21,000 |
| Northern Africa | $20,000 |
| Southern Asia | $19,000 |
| Southern America | $15,000 |
Unlock salary by role, level, and city — and compare to Illumina's industry peers.
- Illumina had 378 active job postings in 2025, a 28.1% increase (+93) from 2024.
- Illumina had 285 active job postings in 2024, a 9.2% increase (+25) from 2023.
- Illumina had 260 active job postings in 2023, a 31.1% increase from 2022.
- Hiring velocity in 2025: 214 new roles/month, up from 213 in 2024 and 233 in 2023. New metric
Illumina's active job postings rose 28.1% in 2025 to 378, with new postings per month cooling from 233 in 2023 to 214 in 2025.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Revelio Labs tracks employee sentiment across Illumina's workforce based on public professional data. Overall sentiment is negative and has declined year over year in 2025.
Overall
Unlock the full sentiment breakdown by department, tenure, and trend over time.
Similar Biotech and Healthcare Services Companies by Employee Count
- How fast is Illumina growing?
- In 2025, Illumina's headcount shrank 1.8% to 9,467 employees, down from 9,643 in 2024.
- Where are Illumina employees located?
- Most Illumina employees are based in the United States (54.2% of headcount), followed by Singapore and the United Kingdom.
- What is the average salary at Illumina?
- The average employee salary at Illumina is approximately $120.9k per year.
- How many people does Illumina hire per year?
- In 2025, Illumina opened roughly 2,568 new roles — about 214 per month.
- When was Illumina founded and where is it headquartered?
- Illumina was founded in 1998 and is headquartered in San Diego, California.
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