Sierra Circuits Sierra Circuits (also known as Sierra Proto Express) is a company that manufactures and assembles printed circuit boards. | ![]() Schweizer Electronic Schweizer Electronic is a company that manufactures printed circuit boards (PCBs). | ![]() Unicircuit Unicircuit is a company that manufactures printed circuit boards for mission-critical, high-reliability, and time-sensitive products. | ![]() Advanced Circuits Advanced Circuits (also known as AdvancedPCB, 4PCB) is a company that provides printed circuit board manufacturing and assembly solutions. | |
Founding Date | Founding Date 1986 | Founding Date 1849 | Founding Date 1979 | Founding Date 1989 |
Type | Type Private | Type Public | Type Subsidiary | Type Subsidiary |
Tags | ||||
Locations | Locations Sunnyvale, US HQ Delta, CA | Locations Schramberg, DE HQ Changzhou, CN Suzhou, CN Singapore, SG Wilmington, US | Locations Littleton, US HQ Littleton, US Littleton, US Santa Ana, US St. Louis, US | Locations Aurora, US HQ Chandler, US Maple Grove, US Orange, US Placentia, US Santa Clara, US |
Employees | Employees 478 | Employees 5043% decrease | Employees 213 | Employees 1762% decrease |
Financial | ||||
Revenue (est.) | Revenue (est.) $108m (Y, 2024) | Revenue (est.) €173.1m (FY, 2025) | Revenue (est.) N/A | Revenue (est.) $89.5m (FY, 2022) |
Gross profit | Gross profit N/A | Gross profit €17.6m (FY, 2025) | Gross profit N/A | Gross profit $41.1m (FY, 2022) |
Operating ⚠ | ||||
Capabilities | Capabilities 7 (Jun, 2024) | Capabilities N/A | Capabilities N/A | Capabilities 11 (May, 2024) |
Certifications and Compliance | Certifications and Compliance 10 (Jun, 2024) | Certifications and Compliance N/A | Certifications and Compliance N/A | Certifications and Compliance 16 (May, 2024) |
Industries Served | Industries Served 8 (Jun, 2024) | Industries Served 4 (FY, 2022) | Industries Served N/A | Industries Served N/A |

Schweizer Electronic is a company that manufactures printed circuit boards (PCBs).
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Unicircuit is a company that manufactures printed circuit boards for mission-critical, high-reliability, and time-sensitive products.
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Advanced Circuits (also known as AdvancedPCB, 4PCB) is a company that provides printed circuit board manufacturing and assembly solutions.
View company