How many employees does Prothena have?
Prothena Corp. Plc (PRTA) has approximately 65 total employees worldwide as of June 2026, according to Revelio Labs workforce intelligence data. Prothena’s total headcount has declined 55.2% from 146 employees in 2023 to 65 in 2026.
Is Prothena hiring right now?
No, Prothena is not actively hiring. Prothena had 0 active job postings in 2026, a 200.0% decline from 2025 — see job openings & hiring trends.
About Prothena’s Workforce
Prothena Corp. Plc (PRTA) is a Pharmaceuticals company that employs 65 people worldwide as of June 2026. It is the 4th-largest by headcount among its peers. Founded in 2012, the company is headquartered in Dublin, Ireland and trades on the NASDAQ.
Prothena's workforce has declined 55.2% from 2023 to 2026, down 31.3% year over year in 2026. It fell to a low of 65 in 2026 Q2 before recovering. Its workforce is concentrated most in North America (86.3%), followed by Northern Europe (12.1%) and Western Europe (1.6%).
Prothena's functional groups are Finance and Operations (59.2%), Engineering (21.7%), and Sales and Marketing (19.1%). The average salary is $216,946, ranging from a median of $196,000 in North America to $176,000 in Northern Europe, down 0.7% year over year in 2026.
Prothena's active job postings fell 200.0% in 2026 to 0, with new postings per month cooling from 17 in 2023 to 0 in 2026. Overall employee sentiment is neutral but declining.
Sourced from Revelio Labs workforce data.
- Ticker
- NASDAQ: PRTA
- Headquarters
- Dublin, Ireland
- Founded
- 2012
- Industry
- Pharmaceuticals
- Employees
- 65
- YoY
- -31.3% (-62)
As of June 2026
Prothena workforce metrics
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Prothena. Compare to peers, export the dataset, and access the full quarterly history.
Unlock MetricsProthena Annual Employee Count (2023-2026)
- Prothena had 65 employees in 2026, a 31.3% decline (-62) from 2025.
- Prothena had 70 employees in 2025, a 29.4% decline (-70) from 2024.
- Prothena had 140 employees in 2024, a 0.9% decline (-9) from 2023.
- Prothena had 149 employees in 2023, a 3.5% increase (+37) from 2022.
Prothena's total workforce has declined from 146 employees in 2023 to 65 in 2026.
Prothena Corp. Plc quarterly employee count
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q2 | 65 | -62 | -31.3% |
| 2026 | Q1 | 69 | -69 | -31.5% |
| 2025 | Q4 | 70 | -70 | -29.4% |
| 2025 | Q3 | 79 | -64 | -24.9% |
| 2025 | Q2 | 127 | -14 | -2.6% |
| 2025 | Q1 | 138 | -7 | +0.9% |
| 2024 | Q4 | 140 | -9 | -0.9% |
| 2024 | Q3 | 143 | -3 | -0.3% |
| 2024 | Q2 | 141 | +2 | -2.4% |
| 2024 | Q1 | 145 | +25 | +3.5% |
| 2023 | Q4 | 149 | +37 | +3.5% |
| 2023 | Q3 | 146 | +44 | +4.7% |
See Prothena's complete headcount history, including quarterly breakdowns.
Get the DataProthena Employee Count by Region (2026)
North America accounts for the largest share of Prothena's global workforce with approximately 86% of total employees, followed by Northern Europe and Western Europe.
Prothena employees by region
| Region | Employees | % of Total |
|---|---|---|
| North America | 56 | 86.3% |
| Northern Europe | 8 | 12.1% |
| Western Europe | 1 | 1.6% |
Drill into city-level data, hiring trends by region, and historic geographic shifts.
Unlock Geographic DataProthena Employee Count by Department (2026)
Prothena's employee groups are Finance and Operations (59.2%), Engineering (21.7%), and Sales and Marketing (19.1%).
Prothena employees by department
| Department | Employees | % of Total |
|---|---|---|
| Finance and Operations | 39 | 59.2% |
| Engineering | 14 | 21.7% |
| Sales and Marketing | 12 | 19.1% |
Compare Prothena's department mix to industry peers.
See Full DataProthena Employee Salary by Region (2026)
Prothena's average employee salary is $216,946 globally. Employees in North America receive the highest compensation. Pay is lowest in Northern Europe, at a median of $176,000.
Prothena median employee salary by region (USD)
| Region | Median Salary |
|---|---|
| North America | $196,000 |
| Northern Europe | $176,000 |
Unlock salary by role, level, and city — and compare to Prothena's industry peers.
Unlock Salary DataProthena Job Openings and Hiring Trends (2023-2026)
- Prothena had 0 active job postings in 2026, a 200.0% decline from 2025.
- Prothena had 0 active job postings in 2025, a 200.0% decline (-4) from 2024.
- Prothena had 4 active job postings in 2024, a 130.4% decline (-15) from 2023.
- Prothena had 19 active job postings in 2023, a 10.0% decline from 2022.
- Hiring velocity in 2026: 0 new roles/month, down from 3 in 2025 and 5 in 2024.
Prothena's hiring is slowing: active job postings fell 200.0% in 2026 to 0, with new postings per month cooling from 17 in 2023 to 0 in 2026.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Unlock Hiring DataProthena Employee Sentiment (2026)
Revelio Labs tracks employee sentiment across Prothena'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 Prothena
- How fast is Prothena growing?
- In 2026, Prothena's headcount shrank 31.3% to 65 employees, down from 127 in 2025.
- See the full headcount history
- Where are Prothena employees located?
- Most Prothena employees are based in North America (86.3% of headcount), followed by Northern Europe and Western Europe.
- Explore where the workforce is based
- How many people work at Prothena in North America?
- About 56 people work at Prothena in North America, its largest region.
- See headcount by region
- What is the average salary at Prothena?
- The average employee salary at Prothena is approximately $216.9k per year.
- Analyze the salary distribution
- How many new job postings does Prothena open per year?
- Through Q2 2026, Prothena opened 0 new job postings. In 2025, Prothena opened 35 new job postings — about 3 per month.
- Track hiring trends by role
- When was Prothena founded and where is it headquartered?
- Prothena was founded in 2012 and is headquartered in Dublin, Ireland.
- Compare Prothena to industry peers
Speak with a workforce expert about Prothena.
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