Company lists · Data refreshed September 2026
Top 25 Box build assembly manufacturers based in the United States
RevenueBase identified 881 box build assembly manufacturers headquartered in the United States as of September 2026 and tracks 46,887 professional contacts across them, including 11,464 with verified work emails. San Jose is the largest hub.
This list covers box build assembly manufacturers 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 29, 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.
The 25 largest box build assembly manufacturers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,192 contacts → | ||||
Indirect evidence “Kimball Electronics was founded in 1961.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,761 contacts → | ||||
Indirect evidence “Creation Technologies is a trusted scaled specialty provider of advanced electronics, with a proven track record of delivering high quality and reliable execution to mid-volume…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 971 contacts → | ||||
Indirect evidence “SMTC is a global Electronics Manufacturing Services (EMS) provider, delivering fully integrated and customized contract manufacturing services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 819 contacts → | ||||
Partial evidence “Keytronic is a value-added contract manufacturer to some of the world’s leading OEMs.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 640 contacts → | ||||
Partial evidence “TTM Technologies, Inc.(TTM) is a leading global manufacturer of technology solutions including engineered systems, radio frequency (RF) components and RF microwave/microelectronic…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 634 contacts → | ||||
Indirect evidence “OSI Electronics is a global Manufacturing Solutions provider headquartered in Hawthorne, CA, and Singapore.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 405 contacts → | ||||
Partial evidence “Mack Technologies is a leading supplier of printed circuit board assembly, systems assembly, and electronics contract manufacturing services for the defense, communications…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 266 contacts → | ||||
Partial evidence “Amphenol Borisch Technologies, a subsidiary of Amphenol Corporation, is a leading vertically integrated electronics manufacturer serving the military and aerospace industries.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 247 contacts → | ||||
Indirect evidence “Pactron is a preeminent provider of Electronics Design & Manufacturing Services, supporting clients across a broad range of industry segments, from semiconductor to networking…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 231 contacts → | ||||
Partial evidence “i3 Assembly LLC is dedicated to advancing our competitive excellence from development through full-scale production manufacturing.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 226 contacts → | ||||
Partial evidence “Full-service manufacturer.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 225 contacts → | ||||
Indirect evidence “VIRTEX is a trusted technology partner that provides strategic Electronic Manufacturing Services (EMS) to our customer base.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 221 contacts → | ||||
Indirect evidence “Milwaukee Electronics is an American electronics manufacturing services (EMS) provider based in the U.S, Mexico and Asia.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 195 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 183 contacts → | ||||
Indirect evidence “Rocket EMS would rather invest its effort in figuring out how to solve a problem instead of telling you all the little things that will delay a project or get in the way.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 179 contacts → | ||||
Strong evidence “Since 1984, MASS has excelled in the custom contract manufacture of electronic chassis, frames, fabrications and turn-key electro-mechanical assemblies built to customer…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 177 contacts → | ||||
Indirect evidence “Enercon Technologies provides integrated electronic product design & contract manufacturing services to the medical, industrial, and defense segments.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 167 contacts → | ||||
Strong evidence “Matric Group is a contract manufacturer of electronic assemblies, offering world-class Electronic Manufacturing Services (EMS) with personalized customer support, working closely…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 160 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 157 contacts → | ||||
Indirect evidence “Zentech Manufacturing, Inc.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 152 contacts → | ||||
Partial evidence “Cypress Industries is a leading, global vertically-integrated contract manufacturer.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 140 contacts → | ||||
Indirect evidence “PARPRO is a full-service contract manufacturing company with an emphasis on EMS and OEM solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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: box build assembly manufacturers. 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 box build assembly manufacturers.
- Partial evidence
- Its own public description names part of box build assembly manufacturers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name box build assembly manufacturers. 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 881 box build assembly manufacturers based in the United States
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Box build assembly manufacturers based in the United States at a glance
As of Sep 29, 2026Companies by employee count
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 881 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 box build assembly manufacturers, 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 “box build assembly manufacturers”. 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 box build assembly manufacturers), 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 box build assembly manufacturers, 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, 11,464 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 29, 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.
Box build assembly manufacturers 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 box build assembly manufacturers, 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 box build assembly manufacturers are there based in the United States?
RevenueBase identified 881 box build assembly manufacturers 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 box build assembly manufacturers?
San Jose leads with 37 headquartered companies, followed by Fremont (21) and Austin (13).
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 11,464 verified decision-maker contacts tracked across these 881 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 29, 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.
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