How many employees work at Sionna Therapeutics?
Sionna Therapeutics, Inc. (SION) has approximately 67 total employees worldwide as of March 2026, according to Revelio Labs workforce intelligence data. Sionna Therapeutics’s total headcount has grown 134.6% from 29 employees in 2023 to 67 in 2026.
Is Sionna Therapeutics hiring right now?
Yes, Sionna Therapeutics is actively hiring. Sionna Therapeutics had 7 active job postings in 2026, a 33.3% increase from 2025 — see job openings & hiring trends.
About Sionna Therapeutics’s Workforce
Sionna Therapeutics, Inc. (SION) is a Biotech and Healthcare Services company that employs 67 people worldwide as of March 2026. It is the 6th-largest by headcount among its peers. Founded in 2019, the company is headquartered in Waltham, Massachusetts and trades on the NASDAQ.
Sionna Therapeutics's workforce has grown 134.6% from 2023 to 2026, up 10.7% year over year in 2026. It fell to a low of 27 in 2023 Q3 before recovering. Its workforce is concentrated most in North America (98.3%), followed by Northern Europe (1.7%).
Sionna Therapeutics's functional groups are Finance and Operations (49.1%), Sales and Marketing (29.1%), and Engineering (21.9%), with Sales and Marketing growing fastest (up 31.4%). The average salary is $206,808, highest in North America at a median of $212,000, up 2.1% year over year in 2026.
Sionna Therapeutics's active job postings rose 33.3% in 2026 to 7, with new postings per month climbing from 0 in 2023 to 4 in 2026.
Sourced from Revelio Labs workforce data.
- Ticker
- NASDAQ: SION
- Headquarters
- Waltham, Massachusetts
- Founded
- 2019
- Industry
- Biotech and Healthcare Services
- Employees
- 67
- YoY
- +10.7% (+18)
As of March 2026
Sionna Therapeutics workforce metrics
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Sionna Therapeutics. Compare to peers, export the dataset, and access the full quarterly history.
Unlock MetricsSionna Therapeutics Annual Employee Count (2023-2026)
- Sionna Therapeutics had 67 employees in 2026, a 10.7% increase (+18) from 2025.
- Sionna Therapeutics had 58 employees in 2025, a 8.5% increase (+19) from 2024.
- Sionna Therapeutics had 39 employees in 2024, a 0.4% increase (+10) from 2023.
- Sionna Therapeutics had 29 employees in 2023, a 9.3% increase from 2022.
Sionna Therapeutics's total workforce has grown from 29 employees in 2023 to 67 in 2026.
Sionna Therapeutics, Inc. quarterly employee count
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q1 | 67 | +18 | +10.7% |
| 2025 | Q4 | 58 | +19 | +8.5% |
| 2025 | Q3 | 57 | +18 | +5.8% |
| 2025 | Q2 | 54 | +16 | +6.1% |
| 2025 | Q1 | 49 | +18 | +3.8% |
| 2024 | Q4 | 39 | +10 | +0.4% |
| 2024 | Q3 | 39 | +12 | +7.6% |
| 2024 | Q2 | 38 | +9 | +7.7% |
| 2024 | Q1 | 31 | +1 | +6.2% |
| 2023 | Q4 | 29 | +0 | +9.3% |
| 2023 | Q3 | 27 | -1 | +5.4% |
| 2023 | Q2 | 29 | +2 | +5.4% |
See Sionna Therapeutics's complete headcount history, including quarterly breakdowns.
Get the DataSionna Therapeutics Employee Count by Region (2026)
North America accounts for the largest share of Sionna Therapeutics's global workforce with approximately 98% of total employees, followed by Northern Europe.
Sionna Therapeutics employees by region
| Region | Employees | % of Total |
|---|---|---|
| North America | 64 | 98.3% |
| Northern Europe | 1 | 1.7% |
Drill into city-level data, hiring trends by region, and historic geographic shifts.
Unlock Geographic DataSionna Therapeutics Employee Count by Department (2026)
Sionna Therapeutics's employee groups are Finance and Operations (49.1%), Sales and Marketing (29.1%), and Engineering (21.9%).
Sionna Therapeutics employees by department
| Department | Employees | % of Total |
|---|---|---|
| Finance and Operations | 33 | 49.1% |
| Sales and Marketing | 19 | 29.1% |
| Engineering | 15 | 21.9% |
Compare Sionna Therapeutics's department mix to industry peers.
See Full DataSionna Therapeutics Employee Salary by Region (2026)
Sionna Therapeutics's average employee salary is $206,808 globally. Employees in North America receive the highest compensation.
Sionna Therapeutics median employee salary by region (USD)
| Region | Median Salary |
|---|---|
| North America | $212,000 |
Unlock salary by role, level, and city — and compare to Sionna Therapeutics's industry peers.
Unlock Salary DataSionna Therapeutics Job Openings and Hiring Trends (2023-2026)
- Sionna Therapeutics had 7 active job postings in 2026, a 33.3% increase (+1) from 2025.
- Sionna Therapeutics had 6 active job postings in 2025, a 66.7% increase (+3) from 2024.
- Sionna Therapeutics had 3 active job postings in 2024, a 200.0% increase (+3) from 2023.
- Sionna Therapeutics had 0 active job postings in 2023, a 0% no change from 2022.
- Hiring velocity in 2026: 4 new roles/month, up from 3 in 2025 and 0 in 2024.
Sionna Therapeutics's hiring is accelerating: active job postings rose 33.3% in 2026 to 7, with new postings per month climbing from 0 in 2023 to 4 in 2026.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Unlock Hiring DataSimilar Companies
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Frequently Asked Questions About Sionna Therapeutics
- How fast is Sionna Therapeutics growing?
- In 2026, Sionna Therapeutics's headcount grew 10.7% to 67 employees, up from 49 in 2025.
- See the full headcount history
- Where are Sionna Therapeutics employees located?
- Most Sionna Therapeutics employees are based in North America (98.3% of headcount), followed by Northern Europe.
- Explore where the workforce is based
- What is the average salary at Sionna Therapeutics?
- The average employee salary at Sionna Therapeutics is approximately $206.8k per year.
- Analyze the salary distribution
- How many new job postings does Sionna Therapeutics open per year?
- In Q1 2026, Sionna Therapeutics opened 11 new job postings. In 2025, Sionna Therapeutics opened 38 new job postings — about 3 per month.
- Track hiring trends by role
- When was Sionna Therapeutics founded and where is it headquartered?
- Sionna Therapeutics was founded in 2019 and is headquartered in Waltham, Massachusetts.
- Compare Sionna Therapeutics to industry peers
Speak with a workforce expert about Sionna Therapeutics.
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