Captor

What Captor does

Captor Corporation is a privately held, ITAR-registered US contract manufacturer founded in 1965 and headquartered in a single 35,000-square-foot facility in Tipp City, Ohio. The company designs and manufactures custom electromagnetic interference (EMI) and electromagnetic compatibility (EMC) filtering solutions — including EMI filters, TEMPEST filters, HEMP/EMP filters, MIL-COTS filters, shielded-facility room filters, custom feedthru capacitors, custom inductors and coils, cable assemblies, wire harnesses, military electronic box builds, and power distribution units — alongside supporting services such as MIL-STD environmental testing, SCIF integration, and infrastructure hardening. Captor reports over 10,000 completed custom filter designs across its history and holds AS9100D/ISO 9001:2015, ANSI J-STD-001 Class 3, IPC-A-610, IPC/WHMA-A-620, MIL-STD-461, MIL-STD-188-125-1, MIL-PRF-15733, and RTCA DO-160 certifications, positioning it as a qualified supplier into defense and aerospace prime contractor programs.

The company serves three vertical markets: military and defense (primary), aerospace and aviation (primary), and commercial/industrial (secondary). End applications span missile guidance, electronic warfare, surveillance and radar, naval defense, avionics, UAVs/eVTOL, SCIFs, and national-security infrastructure hardening. Captor operates an exclusively direct-sales, quote-based go-to-market model with no resellers or distributors; all inquiries flow through a 'Request a Quote' portal on its corporate website, supported by a separate CAD catalog site and a ThomasNet listing for industrial procurement referrals. Lead times are 10–12 weeks for custom orders and 1–3 weeks for stock items.

Revenue is generated through hardware sales of custom and standard EMI/EMC components, assemblies, and related services. Pricing is opaque and specification-driven, with no public list pricing. The company is founder/management-owned with no disclosed institutional investors, no funding rounds, no acquisitions, and no parent company, and it has never publicly disclosed revenue or headcount figures. Customer names are not published; the absence of disclosed logos combined with the narrow defense/aerospace vertical base implies a concentrated book of anchor program awards.

Name

Captor

Legal name

Captor Corporation

Website

https://captorcorp.com

Company type

Private

Founded year

1965

Operating status

Operating

Headcount range

51–100 employees

Short description

Captor Corporation is a privately held, ITAR-registered US contract manufacturer founded in 1965 that designs and builds custom EMI/EMC filters, HEMP/EMP and TEMPEST filters, MIL-COTS components, and SCIF solutions for military, defense, and aerospace prime contractors from its single Tipp City, Ohio facility.

Ownership category

akta.pro rank

Product category

EMI/EMC Filters and Military Electronic Components

NAICS

Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Testing Laboratories and Services (54138), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Electronic Coils, Transformers & Other Inductors (3677), Electrical Industrial Apparatus (3620), Services-Testing Laboratories (8734)

akta.pro primary industry

Passive Filters & RF Passives (LC Filters/Diplexers/Baluns/Attenuators) (HDAHANAG)

akta.pro secondary industry

Test, Measurement & Calibration Equipment Manufacturing Services (ATE, DAQ, metrology electronics) (IMAGAGAH)

Keywords

• Custom EMI filters
• EMC solutions
• Military aerospace components
• Cable assembly manufacturing
• HEMP EMP filters

Headquarters

HQ city

Tipp City

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Custom EMI Filter and Electronic Component Manufacturing: Captor generates revenue through the design, engineering, and manufacture of custom and standard EMI filters, signal line filters, HEMP/EMP filters, TEMPEST filters, capacitors, inductors, cable assemblies, wire harnesses, and power distribution units. Products are sold directly to aerospace, military, and defense customers. Custom orders carry 10-12 week lead times; stock orders ship in 1-3 weeks. The company emphasizes that custom solutions are often more cost-effective than competitors' catalog items.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Captor Corporation designs, engineers, and manufactures custom and standard EMI (electromagnetic interference) and EMC (electromagnetic compatibility) filters, including TEMPEST filters, HEMP/EMP filters, MIL-COTS filters, DC and AC filters, shielded facility room filters, and cylindrical filters, along with related passive components (custom feedthru capacitors, inductors, coils), cable assemblies and wire harnesses, military electronic assemblies, and power distribution units. All design, manufacturing, and MIL-STD testing is performed in-house at a 35,000 sq ft facility in Tipp City, Ohio, serving aerospace, military, defense, and commercial/industrial customers.

Product overview

Captor Corporation is a manufacturer of custom EMI (electromagnetic interference) and EMC (electromagnetic compatibility) filtering solutions. Their product portfolio centers on EMI filters including standard and custom DC EMI filters, AC single-phase and three-phase filters, Tempest filters, HEMP/EMP filters, MIL-COTS filters, and shielded facility room filters. The company also manufactures related passive components (custom feedthru capacitors, inductors, and coils), cable assemblies and wire harnesses, and provides military electronic assembly services. Supporting capabilities include testing services, infrastructure hardening, and SCIF solutions. The offering is a portfolio of specialized hardware products rather than a unified software platform, with custom design services available alongside standard off-the-shelf components.

Differentiator

Problem solved

Functional benefit

Products and services

• EMI Filters Electromagnetic interference filters that block unwanted high-frequency noise on power and signal lines, protecting sensitive electronic equipment from interference and ensuring reliable signal transmission. Used in aerospace, military, defense, and commercial/industrial applications.
• TEMPEST Filters High-isolation electromagnetic filters designed to protect sensitive classified information from unauthorized electromagnetic emanation, meeting NATO SDIP-27 and NSTISSAM standards. Deliver 100 dB insertion loss from 14 kHz to 10 GHz per MIL-STD-220.
• HEMP/EMP Filters High-altitude electromagnetic pulse filters that protect electrical infrastructure from nuclear-generated or naturally occurring EMP events, safeguarding communications and power systems. MIL-STD-188-125-1 compliant with 100 dB insertion loss from 14 kHz to 10 GHz, rated 0-480V and 0-100A.
• Custom Telephone & Signal Line Filters Passive signal filters designed to protect telecommunications and data transmission equipment from electromagnetic interference, available for DC and low-voltage AC applications.
• Custom Capacitors Custom-wound feedthru capacitors with optimized dielectrics for specific voltage levels, featuring low equivalent series resistance and minimal lead inductance for high-frequency EMI filtering. Voltages 0-750 VAC and 0-1000 VDC, currents up to 0-1000 A, DC to 400 Hz.
• Custom Inductors & Coils Build-to-print and custom inductors including toroid, bobbin-wound, tube-wound, C-core, and air-core configurations in various materials for power and signal filtering applications. Wire sizes 4/0 to 40 AWG, current up to 1000 A, voltage 0-1000 VDC and 0-750 VAC.
• Cable Assembly Manufacturing Custom wire harnesses and cable assemblies for aerospace, automotive, electromechanical, and military applications, featuring various connector types and wire gauges.
• MIL-COTS Filters Commercial-off-the-shelf military EMI filters meeting MIL-STD-461 CE102 requirements for Navy, Army, and aerospace applications in single-phase and three-phase configurations.
• Cylindrical Style Filters General-purpose cylindrical EMI filters offering high performance for use in potentially harsh environments with compact form factors.
• Shielded Facility Room Power Line Filters EMI filters for secured rooms and shielded facilities providing greater than 100 dB attenuation from 14KHz or 100KHz to 10 GHz, designed for RF-shielded environments.
• DC EMI Filters Direct current EMI filters rated 0-400 VDC and 1-25 A for suppressing unwanted interference in DC-powered defense, aerospace, and electronics applications.
• Military Electronic Assembly Box builds, integrated systems, and custom electrical control panels for military use meeting rigorous quality and performance standards.
• Power Distribution Units (PDU) Network power sources for routing electrical power to multiple devices, available in rack-mounted, floor-mounted, cabinet, and portable configurations.
• Infrastructure Hardening Services Cybersecurity services that secure IT system infrastructure including databases, web servers, and identity management tools through EMI filtration solutions.
• SCIF (Sensitive Compartmented Information Facility) Solutions EMI and EMC filtration solutions for SCIFs meeting Intelligence Community Directive 705 (ICD705) specifications, including container SCIF solutions.
• Testing Services In-house testing including electrical ATP, vibration, shock, thermal shock, thermal cycling, altitude, humidity, hermetic seal, and burn-in testing to MIL-STD standards.

Quantifiable outcome

• 100 dB insertion loss (TEMPEST filters, 14 kHz to 10 GHz)
• +3 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Murata Manufacturing: Murata is one of the world's largest passive component manufacturers, including a substantial EMI filter and noise suppression product line. While it dominates high-volume commercial applications, it also serves defense/aerospace customers and competes on catalog filter parts where standardization wins.
• Würth Elektronik: Würth Elektronik is a major catalog EMI filter, inductor, and passive component manufacturer serving industrial, automotive, and increasingly aerospace markets. It competes with Captor on the catalog/custom boundary, especially in commercial and industrial EMI filtering applications.
• TE Connectivity (Aerospace, Defense & Marine): TE Connectivity is a global incumbent that offers EMI filters, filtered connectors, and circuit protection as part of a much broader portfolio spanning connectors, sensors, and aerospace systems. While not specialized in pure filter-only solutions like Captor, it competes on many of the same defense and aerospace programs.

Direct peers

• Astrodyne TDI: Astrodyne TDI designs and manufactures EMI filters and power supplies for medical, military, aerospace, and industrial markets. It is one of Captor's closest direct competitors, with overlapping custom filter capabilities, MIL-SPEC certifications, and shared defense/aerospace customers.
• Corry Micronics: Corry Micronics designs and builds custom EMI filters, filtered connectors, and power conditioning products for defense and aerospace customers. It competes with Captor on custom MIL-SPEC filter designs for similar DoD and prime contractor end-uses.
• RFI Corporation: RFI Corporation designs and manufactures custom EMI/RFI filters and power line filters for military, aerospace, and industrial customers. It is a like-sized US competitor with comparable custom filter design services, MIL-STD qualifications, and mission-critical defense applications.
• API Technologies / Spectrum Control: API Technologies (now part of the Spectrum Control / Smiths Interconnect family) manufactures EMI filters, power filters, and EMC components specifically for military and aerospace applications. It competes head-to-head with Captor on MIL-SPEC filter programs and shares the same defense prime customer base.
• LCR Electronics: LCR Electronics manufactures custom EMI/RFI filters and filtered connectors for military and aerospace markets. It directly competes with Captor in custom power line and signal line filtering for defense platforms, with similar ITAR-registered, MIL-SPEC qualified operations.

Regional players

• MPE Limited: MPE Limited is a UK-based manufacturer of high-performance EMC filters, HEMP/EMP protection filters, and filtered feeds for military and infrastructure customers. It is a regional peer — competing on HEMP/EMP filter programs globally but with a different geography than Captor's US-centric operations.
• ETS-Lindgren: ETS-Lindgren designs and manufactures EMC test equipment, shielded enclosures, and RF shielding solutions (including SCIF and shielded room products). It overlaps with Captor's shielded room power line filter and SCIF infrastructure hardening offerings, though it is more US/Europe-centric and stronger on the test/shielding side.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance16 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Captor