How many employees work at Mersana Therapeutics?
Mersana Therapeutics, Inc. has approximately 47 total employees worldwide as of March 2026, according to Revelio Labs workforce intelligence data. Mersana Therapeutics’s total headcount has declined 78.8% from 224 employees in 2023 to 47 in 2026.
Is Mersana Therapeutics hiring right now?
No, Mersana Therapeutics is not actively hiring. Mersana Therapeutics had 0 active job postings in 2026, a 200.0% decline from 2025 — see job openings & hiring trends.
About Mersana Therapeutics’s Workforce
Mersana Therapeutics, Inc. is a Pharmaceuticals company that employs 47 people worldwide as of March 2026. It is the 8th-largest by headcount among its peers. Founded in 2001, the company is headquartered in Cambridge, Massachusetts.
Mersana Therapeutics's workforce has declined 78.8% from 2023 to 2026, down 22.9% year over year in 2026. It fell to a low of 47 in 2026 Q1 before recovering. Its workforce is concentrated most in North America (76.4%), followed by South Asia (12.2%) and Central and Western Asia (5.2%).
Mersana Therapeutics's functional groups are Finance and Operations (47.7%), Engineering (28.5%), and Sales and Marketing (23.8%). The average salary is $150,215, ranging from a median of $164,000 in North America to $19,000 in South Asia, down 21.1% year over year in 2026.
Mersana Therapeutics's active job postings fell 200.0% in 2026 to 0, with new postings per month cooling from 5 in 2023 to 0 in 2026. Overall employee sentiment is neutral but declining.
Sourced from Revelio Labs workforce data.
- Headquarters
- Cambridge, Massachusetts
- Founded
- 2001
- Industry
- Pharmaceuticals
- Employees
- 47
- YoY
- -22.9% (-57)
As of March 2026
Mersana Therapeutics workforce metrics
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Mersana Therapeutics. Compare to peers, export the dataset, and access the full quarterly history.
Unlock MetricsMersana Therapeutics Annual Employee Count (2023-2026)
- Mersana Therapeutics had 47 employees in 2026, a 22.9% decline (-57) from 2025.
- Mersana Therapeutics had 58 employees in 2025, a 18.0% decline (-50) from 2024.
- Mersana Therapeutics had 108 employees in 2024, a 2.3% decline (-17) from 2023.
- Mersana Therapeutics had 125 employees in 2023, a 23.7% decline (-89) from 2022.
Mersana Therapeutics's total workforce has declined from 224 employees in 2023 to 47 in 2026.
Mersana Therapeutics, Inc. quarterly employee count
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q1 | 47 | -57 | -22.9% |
| 2025 | Q4 | 58 | -50 | -18.0% |
| 2025 | Q3 | 69 | -44 | -14.7% |
| 2025 | Q2 | 78 | -40 | -12.1% |
| 2025 | Q1 | 104 | -18 | -3.6% |
| 2024 | Q4 | 108 | -17 | -2.3% |
| 2024 | Q3 | 113 | -34 | -3.9% |
| 2024 | Q2 | 118 | -106 | -23.1% |
| 2024 | Q1 | 122 | -100 | -21.7% |
| 2023 | Q4 | 125 | -89 | -23.7% |
| 2023 | Q3 | 147 | -55 | -22.1% |
| 2023 | Q2 | 224 | +31 | -1.6% |
See Mersana Therapeutics's complete headcount history, including quarterly breakdowns.
Get the DataMersana Therapeutics Employee Count by Region (2026)
North America accounts for the largest share of Mersana Therapeutics's global workforce with approximately 76% of total employees, followed by South Asia and Central and Western Asia.
Mersana Therapeutics employees by region
| Region | Employees | % of Total |
|---|---|---|
| North America | 36 | 76.4% |
| South Asia | 6 | 12.2% |
| Central and Western Asia | 2 | 5.2% |
| North Africa | 2 | 4.6% |
| Arab States | 1 | 1.7% |
Drill into city-level data, hiring trends by region, and historic geographic shifts.
Unlock Geographic DataMersana Therapeutics Employee Count by Department (2026)
Mersana Therapeutics's employee groups are Finance and Operations (47.7%), Engineering (28.5%), and Sales and Marketing (23.8%).
Mersana Therapeutics employees by department
| Department | Employees | % of Total |
|---|---|---|
| Finance and Operations | 21 | 47.7% |
| Engineering | 13 | 28.5% |
| Sales and Marketing | 11 | 23.8% |
Compare Mersana Therapeutics's department mix to industry peers.
See Full DataMersana Therapeutics Employee Salary by Region (2026)
Mersana Therapeutics's average employee salary is $150,215 globally. Employees in North America receive the highest compensation. Pay is lowest in South Asia, at a median of $19,000.
Mersana Therapeutics median employee salary by region (USD)
| Region | Median Salary |
|---|---|
| North America | $164,000 |
| Central and Western Asia | $31,000 |
| South Asia | $19,000 |
Unlock salary by role, level, and city — and compare to Mersana Therapeutics's industry peers.
Unlock Salary DataMersana Therapeutics Job Openings and Hiring Trends (2023-2026)
- Mersana Therapeutics had 0 active job postings in 2026, a 200.0% decline from 2025.
- Mersana Therapeutics had 0 active job postings in 2025, a 200.0% decline (-6) from 2024.
- Mersana Therapeutics had 6 active job postings in 2024, a 15.4% decline (-1) from 2023.
- Mersana Therapeutics had 7 active job postings in 2023, a 149.1% decline from 2022.
- Hiring velocity in 2026: 0 new roles/month, up from 0 in 2025 and 3 in 2024.
Mersana Therapeutics's hiring is slowing: active job postings fell 200.0% in 2026 to 0, with new postings per month cooling from 5 in 2023 to 0 in 2026.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Unlock Hiring DataMersana Therapeutics Employee Sentiment (2026)
Revelio Labs tracks employee sentiment across Mersana Therapeutics's workforce based on public professional data. Overall sentiment is neutral and has declined year over year in 2026.
Overall
Unlock the full sentiment breakdown by department, tenure, and trend over time.
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Frequently Asked Questions About Mersana Therapeutics
- How fast is Mersana Therapeutics growing?
- In 2026, Mersana Therapeutics's headcount shrank 22.9% to 47 employees, down from 104 in 2025.
- See the full headcount history
- Where are Mersana Therapeutics employees located?
- Most Mersana Therapeutics employees are based in North America (76.4% of headcount), followed by South Asia and Central and Western Asia.
- Explore where the workforce is based
- What is the average salary at Mersana Therapeutics?
- The average employee salary at Mersana Therapeutics is approximately $150.2k per year.
- Analyze the salary distribution
- How many new job postings does Mersana Therapeutics open per year?
- In Q1 2026, Mersana Therapeutics opened 0 new job postings. In 2025, Mersana Therapeutics opened 3 new job postings — about 0 per month.
- Track hiring trends by role
- When was Mersana Therapeutics founded and where is it headquartered?
- Mersana Therapeutics was founded in 2001 and is headquartered in Cambridge, Massachusetts.
- Compare Mersana Therapeutics to industry peers
Speak with a workforce expert about Mersana Therapeutics.
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