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Simplex Inc

Simplex designs and manufactures load banks and fuel supply systems for the standby power generation industry.

Appliances; Electrical; and Electronics Manufacturing
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Headquarters
Springfield, Illinois, United StatesSource: RevenueBaseRetrieved October 13, 2026
Employee range
51 to 200Source: RevenueBaseRetrieved October 13, 2026
Founded
1938Source: RevenueBaseRetrieved October 13, 2026
Published list appearances
7 supported appearances ↗Source: RevenueBase lists
The company at a glance

What does Simplex Inc do?

Simplex builds products to meet its customers’ exact requirements.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

Who it serves

Simplex products are used in manufacturing, technology, transportation, hospitals, schools, public utilities, and the U.S. military.

What the business offers

Services & capabilities.

Load banks

Simplex supplies testing and proving equipment for backup generators.

Source: LinkedIn company description · Retrieved October 13, 2026

Fuel supply systems

Simplex designs and engineers custom fuel systems for mission-critical environments.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

Positions describe ordering within each source list. See how lists are built ↗

Share your recognition

Embeddable award for your website

BADGE PREVIEWSimplex Inc listed #7 on Battery testing equipment manufacturers, October 7, 2026Open the published source list.
Simplex Inc

#7 Battery testing equipment manufacturers

Snapshot: October 7, 2026

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Company information

Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 3, 2026. Directory positions use company-contact counts from separate saved list snapshots dated September 16, 2026, September 18, 2026, September 28, 2026 and October 7, 2026. How the company lists are built.

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