Company lists · Data refreshed September 2026

Top 25 Oem service providers based in the United States

Name: Oem service providers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 2,166 companies tracked

RevenueBase identified 2,166 oem service providers headquartered in the United States as of September 2026 and tracks 83,781 professional contacts across them, including 21,402 with verified work emails. San Jose is the largest hub.

This list covers oem service providers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

2,166Companies

83,781Contacts tracked

21,402Verified emails

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The 25 largest oem service providers based in the United States

Ranked by team size

Top 25 of 2,166 oem service providers based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to oem service providers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Sanmina	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	10001+	20,153 contacts →
	Indirect evidence “Sanmina Corporation (Nasdaq: SANM) is a leading integrated manufacturing solutions provider serving the fastest-growing segments of the global Electronics Manufacturing Services…” Source: RevenueBase Database · checked Sep 21, 2026
2	Plexus Corp	Indirect evidence	Neenah, NC, United StatesHQ checked Sep 21, 2026	10001+	8,149 contacts →
	Indirect evidence “Since 1979, Plexus has been partnering with companies to create the products that build a better world.” Source: RevenueBase Database · checked Sep 21, 2026
3	Benchmark	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 21, 2026	10001+	5,362 contacts →
	Indirect evidence “Benchmark is a worldwide provider of innovative product design, engineering services, technology solutions and advanced manufacturing services.” Source: RevenueBase Database · checked Sep 21, 2026
4	Flex-N-Gate	Indirect evidence	Urbana, IL, United StatesHQ checked Sep 21, 2026	10001+	4,298 contacts →
	Indirect evidence “Starting with aftermarket parts in 1956 and moving into O.E.” Source: RevenueBase Database · checked Sep 21, 2026
5	Kimball Electronics	Indirect evidence	Jasper, IN, United StatesHQ checked Sep 21, 2026	5,001-10,000	2,192 contacts →
	Indirect evidence “Kimball Electronics was founded in 1961.” Source: RevenueBase Database · checked Sep 21, 2026
6	Moldtek Technologies Limited	Indirect evidence	Cumming, GA, United StatesHQ checked Sep 21, 2026	501-1,000	1,107 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
7	BDI	Indirect evidence	Cleveland, OH, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,086 contacts →
	Indirect evidence “BDI is a leading supplier and service provider to manufacturing companies throughout the world.” Source: RevenueBase Database · checked Sep 21, 2026
8	Nelson Global	Indirect evidence	Stoughton, WI, United StatesHQ checked Sep 21, 2026	1,001-5,000	879 contacts →
	Indirect evidence “Nelson Global designs, manufactures, and distributes custom solutions for customers across crucial industries worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
9	Keytronic	Strong evidence	Spokane Valley, WA, United StatesHQ checked Sep 21, 2026	1,001-5,000	819 contacts →
	Strong evidence “Keytronic is a value-added contract manufacturer to some of the world’s leading OEMs.” Source: RevenueBase Database · checked Sep 21, 2026
10	Neotech	Indirect evidence	Chatsworth, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	641 contacts →
	Indirect evidence “NEOTech is a premier provider of electronic manufacturing services (EMS), integrated design engineering, and advanced supply chain solutions for the aerospace and defense, medical…” Source: RevenueBase Database · checked Sep 21, 2026
11	OSI Electronics	Indirect evidence	Hawthorne, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	634 contacts →
	Indirect evidence “OSI Electronics is a global Manufacturing Solutions provider headquartered in Hawthorne, CA, and Singapore.” Source: RevenueBase Database · checked Sep 21, 2026
12	IEC Electronics Corp	Indirect evidence	Newark, NY, United StatesHQ checked Sep 21, 2026	n/a	563 contacts →
	Indirect evidence “IEC Electronics, acquired by Creation Technologies in 2021, is a provider of electronic manufacturing services ("EMS") to advanced technology companies that produce life-saving…” Source: RevenueBase Database · checked Sep 21, 2026
13	Mack Molding Company	Indirect evidence	Arlington, VT, United StatesHQ checked Sep 21, 2026	1,001-5,000	453 contacts →
	Indirect evidence “Mack Molding Co, headquartered in Arlington, VT, provides design through FDA-approved manufacturing services to the medical, commercial, computer & business equipment, energy and…” Source: RevenueBase Database · checked Sep 21, 2026
14	RCO Engineering	Indirect evidence	Roseville, MI, United StatesHQ checked Sep 21, 2026	501-1,000	438 contacts →
	Indirect evidence “Specializing in low-volume manufacturing that Tier 1 suppliers avoid, we offer complete program management under one roof, including emergency tooling and parts, large program…” Source: RevenueBase Database · checked Sep 21, 2026
15	East West Manufacturing	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	1,001-5,000	428 contacts →
	Indirect evidence “East West is a trusted Integrated Manufacturing Services (IMS) provider partnering with some of the world’s most recognizable brands and new disruptive players.” Source: RevenueBase Database · checked Sep 21, 2026
16	Pti-Qcs	Strong evidence	Detroit, MI, United StatesHQ checked Sep 21, 2026	1,001-5,000	420 contacts →
	Strong evidence “PTI Quality Containment Solutions strives to be the best company in providing supply chain solutions to OEMs and their suppliers.” Source: RevenueBase Database · checked Sep 21, 2026
17	Sigmatron International	Indirect evidence	Elk Grove Village, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	391 contacts →
	Indirect evidence “Service-Driven Electronics Manufacturing.” Source: RevenueBase Database · checked Sep 21, 2026
18	Artiflex Manufacturing, INC	Indirect evidence	Grand Rapids, MI, United StatesHQ checked Sep 21, 2026	501-1,000	324 contacts →
	Indirect evidence “ArtiFlex Manufacturing is a global leader in design, tooling, automation, past model service, factory assist, and low-volume tooling and production solutions.” Source: RevenueBase Database · checked Sep 21, 2026
19	MW Components	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 21, 2026	1,001-5,000	293 contacts →
	Indirect evidence “MW Components is focused on accelerating the entire process of delivering custom, stock, and standard parts to virtually any volume and against demanding deadlines.” Source: RevenueBase Database · checked Sep 21, 2026
20	VEXOS	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	283 contacts →
	Indirect evidence “Vexos, is an award-winning global electronics manufacturing services (EMS) and custom material solutions (CMS) company, providing complete end-to-end supply chain management…” Source: RevenueBase Database · checked Sep 21, 2026
21	Microtechnologies	Strong evidence	Hicksville, NY, United StatesHQ checked Sep 21, 2026	201-500	280 contacts →
	Strong evidence “Micro delivers a micro component design and manufacturing solutions for global OEMs, with exceptional precision and industry leading PPM at scale.” Source: RevenueBase Database · checked Sep 21, 2026
22	Ascentec Engineering, LLC	Indirect evidence	Tualatin, OR, United StatesHQ checked Sep 21, 2026	201-500	272 contacts →
	Indirect evidence “Ascentec Engineering was founded in 2001 by a team of process and manufacturing engineers all with a solid background in electronics manufacturing processes.” Source: RevenueBase Database · checked Sep 21, 2026
23	Quest International INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 21, 2026	201-500	264 contacts →
	Indirect evidence “Quest partners with Healthcare & Life science Original Equipment Manufacturers globally to provide world-class ISO accredited aftermarket technical services such as field…” Source: RevenueBase Database · checked Sep 21, 2026
24	Penn United Technologies, INC	Indirect evidence	Cabot, PA, United StatesHQ checked Sep 21, 2026	501-1,000	254 contacts →
	Indirect evidence “Penn United provides MANUFACTURING SOLUTIONS for customers needing precision components or precision-assembled products.” Source: RevenueBase Database · checked Sep 21, 2026
25	Medplast INC	Strong evidence	Foxborough, MA, United StatesHQ checked Sep 21, 2026	5,001-10,000	250 contacts →
	Strong evidence “About Viant (formerly MedPlast) At Viant, we focus on providing end-to-end solutions for medical device OEMs.” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: oem service providers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names oem service providers.
Partial evidence: Its own public description names part of oem service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oem service providers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 2,166 oem service providers based in the United States

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Oem service providers based in the United States at a glance

As of Sep 21, 2026

25.5%Verified-email coverage

38.7Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · San Jose

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

776

11-50

729

51-200

466

201-500

112

501-1,000

1,001-5,000

5,001-10,000

10001+

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 2,166 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among oem service providers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “oem service providers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names oem service providers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among oem service providers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 21,402 across the full list. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Oem service providers by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names oem service providers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many oem service providers are there based in the United States?

RevenueBase identified 2,166 oem service providers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Sanmina, headquartered in San Jose, tops this list with the largest team on record.

Which city has the most oem service providers?

San Jose leads with 42 headquartered companies, followed by San Diego (30) and Houston (27).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 21,402 verified decision-maker contacts tracked across these 2,166 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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 Smart Search, 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.