Cellular Technology Limited — CTL Information
Summary
Cellular Technology Limited — CTL was founded in 1998 and is headquartered in Shaker Heights, Ohio, within the Cleveland Metropolitan Area. The independent biotech company specializes in ELISPOT standardization packages, ImmunoSpot® analyzers, and a range of high‑throughput assays—including Fluorospot, ELISPOT, viral plaque, and foci testing—alongside FACS analysis, serum‑free media platforms, and cell biology services such as PBMC, monocyte activation, B‑cell, and T‑cell assays. CTL supports research and development with contract research offerings that are GLP compliant, offering plate scanning & analysis, image analysis, and target cell visualization.
With a workforce of 100–200 employees and annual revenue between $50 million and $100 million, the company serves customers across immunology and cellular biology. Leadership includes Marsha Durken Hallin (Customer Service Coordinator), Anton Gorbachev (Director CRO Laboratory), Eric Eilberg (Firmware Developer), and Matthew Jones (Regulatory Affairs & Quality Assurance Manager).
| Website | immunospot.com |
| Phone Number | 888-791-4005 |
| Industries | |
| Headquarters Address | 20521 Chagrin Blvd, Shaker Heights, OH, 44122-5350 US |
| Company Size | 100-200 employees |
| Specialities & Services | ELISPOT Standardization Package, ImmunoSpot® Analyzers, Human PBMC reference samples, Contract Research, including GLP-compliant, high-throughput ELISPOT testing, FACS Analysis, Serum-free Media Platform, Plate Scanning & Analysis, PBMC, Monocyte Activation Testing, B cell assays, T cell assays, immunology, Research and Development, Cell counting, Image Analysis, Cell Biology, Target Cell Visualization Assay, High throughput ELISPOT, Fluorospot, ELISPOT, Immune Monitoring, Viral Plaque Assays, Foci |
| DMA Code | Cleveland Metropolitan Area |
| Founded | 1998 |
| Estimated Annual Revenue | $50M - 100M |
| Operating Status | Independent Company |
| Updated: | 2026-09-21 |
Competitors
Name | Founded | Type | Employees |
|---|---|---|---|
| 2002 | Public Company | 1.0K - 5.0K | |
| 2013 | Privately Held | 25 - 100 | |
| 2006 | Privately Held | 25 - 100 | |
| 1999 | Privately Held | 500 - 1.0K |
Estimated Website Traffic
The chart shows a growth in traffic to the immunospot.com website. In September, traffic increased to 1385, compared to 1139 in the previous month. The highest traffic in 2026 was recorded in January, reaching 2902 visits.
Workforce Turnover
Number of staff members switched
Departmental Headcount Distribution
Corporate Tenure Analytics
Workforce Experience Insights
5% have been with the company for less than 1 year5% have been with the company for 1 to 2 years10% have been with the company for 3 to 4 years15% have been with the company for 5 to 7 years15% have been with the company for 8 to 10 years50% have been with the company for more than 11 years
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