Company lists · Data refreshed September 2026

Top 25 Semiconductor assembly companies based in the United States

Name: Semiconductor assembly companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 339 companies tracked

RevenueBase identified 339 semiconductor assembly companies headquartered in the United States as of September 2026 and tracks 59,103 professional contacts across them, including 17,527 with verified work emails. San Jose is the largest hub.

This list covers semiconductor assembly companies 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 17, 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 17, 2026 86% judged on-target in blind review

339Companies

59,103Contacts tracked

17,527Verified emails

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The 25 largest semiconductor assembly companies based in the United States

Ranked by team size

Top 25 of 339 semiconductor assembly companies based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to semiconductor assembly companies: 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	Globalfoundries	Partial evidence	Malta, NY, United StatesHQ checked Sep 17, 2026	10001+	13,067 contacts →
	Partial evidence “GlobalFoundries (GF) is a leading manufacturer of essential semiconductors, enabling AI at scale from the cloud to the physical world.” Source: RevenueBase Database · checked Sep 17, 2026
2	Amkor Technology, INC	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 17, 2026	10001+	6,435 contacts →
	Partial evidence “Amkor Technology, Inc.(Nasdaq: AMKR) is the world’s largest U.S-headquartered OSAT and is a global leader in outsourced semiconductor packaging and test services.” Source: RevenueBase Database · checked Sep 17, 2026
3	NXP Acquires Freescale Semiconductor	Partial evidence	Austin, TX, United StatesHQ checked Sep 17, 2026	10001+	5,179 contacts →
	Partial evidence “Freeascale, Inc has been acquired by NXP Semiconductors.” Source: RevenueBase Database · checked Sep 17, 2026
4	Qorvo, INC	Partial evidence	Greensboro, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,469 contacts →
	Partial evidence “Qorvo (Nasdaq: QRVO) supplies innovative semiconductor solutions that make a better world possible.” Source: RevenueBase Database · checked Sep 17, 2026
5	Maxim Integrated	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,110 contacts →
	Indirect evidence “Maxim Integrated is now officially part of Analog Devices.” Source: RevenueBase Database · checked Sep 17, 2026
6	Ultra Clean Technology	Partial evidence	Hayward, CA, United StatesHQ checked Sep 17, 2026	5,001-10,000	2,287 contacts →
	Partial evidence “UltraClean Holdings, Inc.(UCT) is a global leader in semiconductor fabrication support.” Source: RevenueBase Database · checked Sep 17, 2026
7	Cypress Semiconductor Corporation	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 17, 2026	5,001-10,000	2,011 contacts →
	Indirect evidence “Please consider following the page of Infineon - as we are now Infineon -).” Source: RevenueBase Database · checked Sep 17, 2026
8	Axcelis Technologies	Indirect evidence	Beverly, MA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,288 contacts →
	Indirect evidence “Axcelis Technologies, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
9	VEECO	Indirect evidence	Plainview, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,189 contacts →
	Indirect evidence “Making a Material Difference is at the core of our DNA.” Source: RevenueBase Database · checked Sep 17, 2026
10	Cohu, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	769 contacts →
	Partial evidence “Cohu is the leading supplier of semiconductor test handlers and contactors, and a growing provider of automated test equipment, inspection & metrology solutions, and data…” Source: RevenueBase Database · checked Sep 17, 2026
11	Sunedison Semiconductor	Partial evidence	St. Peters, MO, United StatesHQ checked Sep 17, 2026	1,001-5,000	693 contacts →
	Partial evidence “SunEdison Semiconductor's silicon wafers are the foundation for intelligent electronics in devices such as computers, smart phones, TVs, gaming devices, music players, appliances…” Source: RevenueBase Database · checked Sep 17, 2026
12	Skywater Technology	Partial evidence	Bloomington, MN, United StatesHQ checked Sep 17, 2026	501-1,000	674 contacts →
	Partial evidence “SkyWater (NASDAQ: SKYT) is a U.S-based semiconductor manufacturer and a DMEA-accredited Category 1A Trusted Supplier.” Source: RevenueBase Database · checked Sep 17, 2026
13	Rochester Electronics, LLC	Partial evidence	Newburyport, MA, United StatesHQ checked Sep 17, 2026	501-1,000	662 contacts →
	Partial evidence “Rochester Electronics is the world’s largest continuous source of semiconductors–100% Authorized by over 70 leading semiconductor manufacturers.” Source: RevenueBase Database · checked Sep 17, 2026
14	Mattson Technology	Partial evidence	Fremont, CA, United StatesHQ checked Sep 17, 2026	501-1,000	579 contacts →
	Partial evidence “Mattson Technology designs, manufactures, markets and supports semiconductor wafer processing equipment used in the fabrication of integrated circuits.” Source: RevenueBase Database · checked Sep 17, 2026
15	Synapse Design INC	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 17, 2026	501-1,000	570 contacts →
	Partial evidence “Since its founding in 2003, Synapse Designs' specialized design and engineering services have made us the preferred partner to numerous top-tier semiconductor and systems…” Source: RevenueBase Database · checked Sep 17, 2026
16	FM Industries	Indirect evidence	Fremont, CA, United StatesHQ checked Sep 17, 2026	201-500	552 contacts →
	Indirect evidence “FM Industries, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
17	Ulkasemi	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 17, 2026	501-1,000	523 contacts →
	Indirect evidence “Founded in 2007, headquartered in Santa Clara (Silicon Valley) with operations in Dhaka, Bangladesh.” Source: RevenueBase Database · checked Sep 17, 2026
18	PCB Technologies LTD	Indirect evidence	Ocean Township, NJ, United StatesHQ checked Sep 17, 2026	501-1,000	517 contacts →
	Indirect evidence “PCB Technologies is an All-in-One Solutions provider of high-mix multilayer rigid, rigid-flex and multi-flex PCBs, Substrates, IC Packaging, complex electronic component…” Source: RevenueBase Database · checked Sep 17, 2026
19	Silfex, Inc.	Partial evidence	Eaton, OH, United StatesHQ checked Sep 17, 2026	1,001-5,000	512 contacts →
	Partial evidence “A Lam Research Company, providing precision silicon components powering global semiconductor innovation.” Source: RevenueBase Database · checked Sep 17, 2026
20	Tsmc Washington	Partial evidence	Camas, WA, United StatesHQ checked Sep 17, 2026	501-1,000	510 contacts →
	Partial evidence “TSMC Washington is an integrated circuit (IC) semiconductor foundry in the United States.” Source: RevenueBase Database · checked Sep 17, 2026
21	Micross Components	Indirect evidence	Apopka, FL, United StatesHQ checked Sep 17, 2026	501-1,000	479 contacts →
	Indirect evidence “Micross is the most complete provider of advanced microelectronic services and component, die and wafer solutions.” Source: RevenueBase Database · checked Sep 17, 2026
22	Polar Semiconductor	Partial evidence	Bloomington, MN, United StatesHQ checked Sep 17, 2026	501-1,000	450 contacts →
	Partial evidence “Located in Bloomington, Minnesota, Polar Semiconductor, LLC has decades of experience in high-performance, automotive-grade semiconductor manufacturing.” Source: RevenueBase Database · checked Sep 17, 2026
23	Universal Instruments Corporation	Partial evidence	Conklin, NY, United StatesHQ checked Sep 17, 2026	501-1,000	410 contacts →
	Partial evidence “We are a technology leader in the design and manufacture of precision automation solutions for the semiconductor and electronics manufacturing industry.” Source: RevenueBase Database · checked Sep 17, 2026
24	Modern Industries	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 17, 2026	201-500	354 contacts →
	Indirect evidence “Modern Industries, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
25	R&d Altanova	Indirect evidence	South Plainfield, NJ, United StatesHQ checked Sep 17, 2026	10001+	280 contacts →
	Indirect evidence “With the acquisition of R&D Altanova by Advantest, I am pleased I am now part of Advantest Interconnect Solutions (AIS).” Source: RevenueBase Database · checked Sep 17, 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: semiconductor assembly companies. 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 semiconductor assembly companies.
Partial evidence: Its own public description names part of semiconductor assembly companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name semiconductor assembly companies. 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 339 semiconductor assembly companies based in the United States

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Semiconductor assembly companies based in the United States at a glance

As of Sep 17, 2026

29.7%Verified-email coverage

174.3Average contacts per company

11-50Median size (employees)

6.5%Largest-city concentration · San Jose

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

103

11-50

108

51-200

201-500

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 339 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 semiconductor assembly companies, 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 “semiconductor assembly companies”. 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 semiconductor assembly companies), 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 semiconductor assembly companies, 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, 17,527 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 17, 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.

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 semiconductor assembly companies, 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 semiconductor assembly companies are there based in the United States?

RevenueBase identified 339 semiconductor assembly companies 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?

Globalfoundries, headquartered in Malta, tops this list with the largest team on record.

Which city has the most semiconductor assembly companies?

San Jose leads with 22 headquartered companies, followed by Fremont (16) 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 17,527 verified decision-maker contacts tracked across these 339 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 17, 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.