Company lists · Data refreshed September 2026

Top 25 Semiconductor fabrication services based in the United States

Name: Semiconductor fabrication services 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 310 companies tracked

RevenueBase identified 310 semiconductor fabrication services headquartered in the United States as of September 2026 and tracks 36,835 professional contacts across them, including 14,107 with verified work emails. San Jose is the largest hub.

This list covers semiconductor fabrication services 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

310Companies

36,835Contacts tracked

14,107Verified emails

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The 25 largest semiconductor fabrication services based in the United States

Ranked by team size

Top 25 of 310 semiconductor fabrication services 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 fabrication services: 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	KLA	Indirect evidence	Milpitas, CA, United StatesHQ checked Sep 17, 2026	10001+	12,672 contacts →
	Indirect evidence “KLA develops industry-leading equipment and services that enable innovation throughout the electronics industry.” 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	Tokyo Electron US	Partial evidence	Austin, TX, United StatesHQ checked Sep 17, 2026	10001+	2,812 contacts →
	Partial evidence “Since its founding in 1963, TEL has grown to encompass many offices around the world that engineer, manufacture, sell, and service wafer-processing or semiconductor production…” Source: RevenueBase Database · checked Sep 17, 2026
4	Ultra Clean Technology	Strong evidence	Hayward, CA, United StatesHQ checked Sep 17, 2026	5,001-10,000	2,287 contacts →
	Strong evidence “UltraClean Holdings, Inc.(UCT) is a global leader in semiconductor fabrication support.” Source: RevenueBase Database · checked Sep 17, 2026
5	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
6	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
7	Mattson Technology	Strong evidence	Fremont, CA, United StatesHQ checked Sep 17, 2026	501-1,000	579 contacts →
	Strong 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
8	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
9	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
10	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
11	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
12	Brewer Science	Partial evidence	Rolla, MO, United StatesHQ checked Sep 17, 2026	201-500	437 contacts →
	Partial evidence “Brewer Science is a global technology leader in developing and manufacturing innovative materials, processes, and equipment for the reliable fabrication of cutting-edge…” Source: RevenueBase Database · checked Sep 17, 2026
13	Msr-Fsr, LLC	Indirect evidence	Chandler, AZ, United StatesHQ checked Sep 17, 2026	501-1,000	364 contacts →
	Indirect evidence “MSR-FSR, Materials Support Resources and Field Support Resources, provides on-site services with certified FSEs, and off-site programs with regional service centers, that are…” Source: RevenueBase Database · checked Sep 17, 2026
14	Delta Design	Indirect evidence	Poway, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	293 contacts →
	Indirect evidence “Cohu is a publicly traded (NASDAQ: COHU) global company with headquarters in Poway, CA.” Source: RevenueBase Database · checked Sep 17, 2026
15	Integra Technologies INC	Partial evidence	Wichita, KS, United StatesHQ checked Sep 17, 2026	201-500	217 contacts →
	Partial evidence “Our mission: to deliver secure, reliable, state-of-the-art semiconductors and semiconductor services with unwavering integrity.” Source: RevenueBase Database · checked Sep 17, 2026
16	Invecas	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 17, 2026	201-500	209 contacts →
	Indirect evidence “INVECAS Technologies Pvt.” Source: RevenueBase Database · checked Sep 17, 2026
17	Plasma-Therm	Partial evidence	St. Petersburg, FL, United StatesHQ checked Sep 17, 2026	201-500	190 contacts →
	Partial evidence “Plasma-Therm is a global manufacturer of advanced plasma-processing equipment, providing etch, deposition, and plasma dicing technologies used in semiconductor packaging…” Source: RevenueBase Database · checked Sep 17, 2026
18	Ulvac Technologies, INC	Indirect evidence	Methuen, MA, United StatesHQ checked Sep 17, 2026	51-200	181 contacts →
	Indirect evidence “ULVAC Technologies, Inc.(ISO 9001:2008) was established in 1992 as the US subsidiary of ULVAC, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
19	Jireh Semiconductor INC	Strong evidence	Hillsboro, OR, United StatesHQ checked Sep 17, 2026	501-1,000	167 contacts →
	Strong evidence “Jireh Semiconductor is the wafer fabrication facility of Alpha and Omega Semiconductor in Hillsboro, OR.” Source: RevenueBase Database · checked Sep 17, 2026
20	Shellback Semiconductor Technology	Indirect evidence	Coopersburg, PA, United StatesHQ checked Sep 17, 2026	201-500	147 contacts →
	Indirect evidence “For over 400 years, intrepid mariners have embarked on long journeys into uncharted waters.” Source: RevenueBase Database · checked Sep 17, 2026
21	Trio-Tech International	Partial evidence	Van Nuys, CA, United StatesHQ checked Sep 17, 2026	501-1,000	134 contacts →
	Partial evidence “Founded in 1958, Trio-Tech International (NYSE MKT: TRT) is a leading provider of semiconductor testing services, manufacturing solutions, and value-added distribution services.” Source: RevenueBase Database · checked Sep 17, 2026
22	ISE Labs ASE	Partial evidence	Fremont, CA, United StatesHQ checked Sep 17, 2026	51-200	132 contacts →
	Partial evidence “ISE Labs is a one-stop semiconductor engineering service provider.” Source: RevenueBase Database · checked Sep 17, 2026
23	LA Semiconductor	Strong evidence	Pocatello, ID, United StatesHQ checked Sep 17, 2026	201-500	124 contacts →
	Strong evidence “LA Semiconductor is a US-owned semiconductor foundry located in Pocatello, Idaho, that specializes in the fabrication of Analog, Mixed Signal, and Power products.” Source: RevenueBase Database · checked Sep 17, 2026
24	Absolics INC	Indirect evidence	Covington, GA, United StatesHQ checked Sep 17, 2026	51-200	109 contacts →
	Indirect evidence “The world's 1st glass substrate manufacturer and a leading provider of advanced packaging technologies and services, offering scalable solutions for businesses of high-performance…” Source: RevenueBase Database · checked Sep 17, 2026
25	Akrion Technologies INC	Partial evidence	Allentown, PA, United StatesHQ checked Sep 17, 2026	51-200	104 contacts →
	Partial evidence “Akrion Technologies Inc is a supplier of advanced wafer process equipment solutions used in the fabrication of microelectronic devices.” 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 fabrication services. 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 fabrication services.
Partial evidence: Its own public description names part of semiconductor fabrication services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name semiconductor fabrication services. 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 310 semiconductor fabrication services based in the United States

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Semiconductor fabrication services based in the United States at a glance

As of Sep 17, 2026

38.3%Verified-email coverage

118.8Average contacts per company

11-50Median size (employees)

8.1%Largest-city concentration · San Jose

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

111

11-50

100

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 310 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 fabrication services, 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 fabrication services”. 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 fabrication services), 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 fabrication services, 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, 14,107 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.

Semiconductor fabrication services by metro

Semiconductor fabrication services in San Jose25

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 fabrication services, 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 fabrication services are there based in the United States?

RevenueBase identified 310 semiconductor fabrication services 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?

KLA, headquartered in Milpitas, tops this list with the largest team on record.

Which city has the most semiconductor fabrication services?

San Jose leads with 25 headquartered companies, followed by Austin (18) and Fremont (15).

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 14,107 verified decision-maker contacts tracked across these 310 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.