Sierra Circuits Sierra Circuits (also known as Sierra Proto Express) is a company that manufactures and assembles printed circuit boards. | ![]() 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 2008 | Founding Date 1979 | Founding Date 1989 |
Type | Type Private | Type Subsidiary | Type Subsidiary | Type Subsidiary |
Tags | ||||
Locations | Locations Sunnyvale, US HQ Delta, CA | Locations San Jose, US HQ Shanghai, CN Shinjuku City, JP | 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 3334% increase | Employees 213 | Employees 1762% decrease |
Financial | ||||
Revenue (est.) | Revenue (est.) $108m (Y, 2024) | Revenue (est.) N/A | Revenue (est.) N/A | Revenue (est.) $89.5m (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) |
Product Categories | Product Categories 3 (Jun, 2024) | Product Categories 4 (Sep, 2023) | Product Categories N/A | Product Categories N/A |

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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.
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