Company lists · Data refreshed September 2026

Top 25 Mechanical assembly companies based in the United States

RevenueBase identified 1,379 company matches for mechanical assembly companies associated with the United States as of September 2026 and tracks 30,356 professional contacts across them, including 7,313 with verified work emails. San Jose is the largest hub.

This list covers company matches for mechanical assembly companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 20, 2026 How this list was built
1,379Companies
30,356Contacts tracked
7,313Verified emails
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The 25 largest mechanical assembly companies based in the United States

Ranked by team size
Top 25 of 1,379 company matches for mechanical assembly companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchCosta Mesa, CA, United StatesHQ recorded Sep 20, 20261,001-5,0001,452 contacts →

Exact match

“Founded in 1849, Ducommun is the oldest company in California.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2Exact matchSedro-woolley, WA, United StatesHQ recorded Sep 20, 20261,001-5,000914 contacts →

Exact match

“Janicki is a privately-owned engineering and manufacturing company with locations in Washington and Utah.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3Exact matchMayville, WI, United StatesHQ recorded Sep 20, 20261,001-5,000906 contacts →

Exact match

“We are more than just a manufacturing and fabricating company.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchSomerset, NJ, United StatesHQ recorded Sep 20, 2026501-1,000723 contacts →

Exact match

“MICRO is a full service contract manufacturer that draws on more than 80 years of experience in medical device assembly, precision metal stamping, insert and injection molding…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchSkaneateles, NY, United StatesHQ recorded Sep 20, 20261,001-5,000499 contacts →

Exact match

“Founded in 1973, Tessy Plastics is a global contract manufacturer headquartered in Skaneateles, NY, specializing in injection molding and custom automated assembly solutions.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchGrand Rapids, MI, United StatesHQ recorded Sep 20, 20261,001-5,000472 contacts →

Exact match

“As a global supplier of precision engineered assemblies, we design, engineer and manufacture things that move.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchChelsea, MI, United StatesHQ recorded Sep 20, 2026501-1,000401 contacts →

Exact match

“Hatch is recognized as a world class leader in the design and manufacturing of metal stampings and assemblies.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchWarren, MI, United StatesHQ recorded Sep 20, 2026501-1,000359 contacts →

Exact match

“Since 1937, Paslin has been a leading innovator in the concept, design, construction and deployment of manufacturing assembly and automation systems.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchVestavia Hills, AL, United StatesHQ recorded Sep 20, 20261,001-5,000354 contacts →

Exact match

“O’Neal Manufacturing Services (OMS) is a supplier of fabricated metal components and welded assemblies.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchTualatin, OR, United StatesHQ recorded Sep 20, 2026201-500272 contacts →

Exact match

“Ascentec Engineering was founded in 2001 by a team of process and manufacturing engineers all with a solid background in electronics manufacturing processes.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchCabot, PA, United StatesHQ recorded Sep 20, 2026501-1,000254 contacts →

Exact match

“Penn United provides MANUFACTURING SOLUTIONS for customers needing precision components or precision-assembled products.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchIndianapolis, IN, United StatesHQ recorded Sep 20, 2026201-500233 contacts →

Exact match

“Established in 1946, Major Tool & Machine started business as a custom job shop specializing in the production of tooling and aircraft ground support equipment and has since…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchBinghamton, NY, United StatesHQ recorded Sep 20, 2026201-500231 contacts →

Exact match

“i3 Assembly LLC is dedicated to advancing our competitive excellence from development through full-scale production manufacturing.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchWoodinville, TN, United StatesHQ recorded Sep 20, 2026501-1,000229 contacts →

Exact match

“NIC Global is a single-source manufacturer providing turn-key mechanical and electromechanical assembly, expert sheet metal fabrication, and global sourcing of metal and plastic…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchMorton, IL, United StatesHQ recorded Sep 20, 2026501-1,000227 contacts →

Exact match

“Morton Industries is a leading manufacturer of Fabricated Tube and Sheet Metal Assemblies.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchMount Pleasant, PA, United StatesHQ recorded Sep 20, 2026201-500226 contacts →

Exact match

“Full-service manufacturer.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchWilsonville, OR, United StatesHQ recorded Sep 20, 2026201-500213 contacts →

Exact match

“Precision Automation Custom-engineered, high speed precision assembly and inspection solutions that solve your most complex manufacturing challenges at scale.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchSan Jose, CA, United StatesHQ recorded Sep 20, 2026201-500179 contacts →

Exact match

“Since 1984, MASS has excelled in the custom contract manufacture of electronic chassis, frames, fabrications and turn-key electro-mechanical assemblies built to customer…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchElk Grove Village, IL, United StatesHQ recorded Sep 20, 202610001+177 contacts →

Exact match

“Hi-P is a well known global contract manufacturer who specializes in complex electromechanical components.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchElk Grove Village, IL, United StatesHQ recorded Sep 20, 202651-200173 contacts →

Exact match

“Acme Industries is a full-service, contract manufacturing company.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchSeneca, PA, United StatesHQ recorded Sep 20, 2026201-500167 contacts →

Exact match

“Matric Group is a contract manufacturer of electronic assemblies, offering world-class Electronic Manufacturing Services (EMS) with personalized customer support, working closely…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchRochester, NY, United StatesHQ recorded Sep 20, 2026201-500160 contacts →

Exact match

“PEKO is a leading contract manufacturer providing full-service, end-to-end manufacturing of large-scale machinery, complex equipment, and major electro-mechanical assemblies for…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchDetroit, MI, United StatesHQ recorded Sep 20, 2026201-500156 contacts →

Exact match

“LM Manufacturing provides manufacturing, assembly, sequencing, supply chain and logistics management for complete seat assemblies and other value-added modular assemblies for…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchSan Jose, CA, United StatesHQ recorded Sep 20, 2026501-1,000155 contacts →

Exact match

“At Emerald Technologies, we provide our customers with world-class service experiences built on strong partnerships, flexible manufacturing capabilities, and expert engineering…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchAustin, TX, United StatesHQ recorded Sep 20, 2026201-500152 contacts →

Exact match

“Cypress Industries is a leading, global vertically-integrated contract manufacturer.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 1,379 mechanical assembly companies based in the United States

See the full list, filter by size, metro and specialty, and access 7,313 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Mechanical assembly companies based in the United States at a glance

As of Sep 20, 2026
24.1%Verified-email coverage
22.0Average contacts per company
11-50Median size (employees)
1.5%Largest-city concentration · San Jose
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
340
11-50
523
51-200
397
201-500
76
501-1,000
25
1,001-5,000
14
5,001-10,000
2
10001+
1

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,379 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “mechanical assembly companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 7,313 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “mechanical assembly companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many mechanical assembly companies are there based in the United States?

RevenueBase identified 1,379 company matches for mechanical assembly companies associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Ducommun Incorporated tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most mechanical assembly companies?

San Jose leads with 21 company records, followed by Rochester (15) and Fremont (12).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 7,313 professional contacts with verified work emails tracked across these 1,379 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.