Verified Nov 2026
Metal Fabrication
·
Union City, California
·
Since 1978
GCM is a precision manufacturer headquartered in Union City, California, founded in 1978 and employing roughly 200 to 500 people, with estimated annual revenue of $10 to $50 million. The company produces precision metal parts through sheet metal fabrication, CNC machining, and robotic welding, serving the medical technology, automotive, electric vehicle, aerospace, and industrial equipment sectors. It is privately held. In February 2026, GCM acquired Kettmann Machining, adding capacity to its medical technology manufacturing business.
GCM at a glance
Revenue
$10-50M
Est. band
Employees
200-500
Founded
1978
Headquarters
Union City, California
Certifications
AS9100 · ISO 13485 · ISO 14001 · ISO 9001 · ITAR registered
Import activity
158
Industries
Automotive
Electric Vehicles
Medical
Industrial Equipment
Aerospace
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
158
Named foreign suppliers
7
Top origins
China · Hong Kong S.A.R. · Taiwan
Shared foreign counterparties do not establish that these companies buy from GCM.
What this tells a buyer
GCM's most recent reported development is its February 2026 acquisition of Kettmann Machining, which was announced as strengthening its position as a manufacturing partner to the MedTech industry.
GCM holds AS9100, ISO 13485, ISO 9001, and ISO 14001 certifications and is registered under ITAR, and its listed capabilities include CNC machining, sheet metal, welding, and tooling.
GCM is a privately held company, and its record lists no named customers, so its industry position is best described by the sectors it serves rather than by specific client relationships.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
STABILITY SIGNALS
Established & active
48 years in operation (founded 1978).
Holds AS9100, ISO 13485, ISO 14001, ISO 9001, ITAR registered certification(s) per public sources.
Overview
GCM is a precision manufacturer headquartered in Union City, California, founded in 1978 and employing roughly 200 to 500 people, with estimated annual revenue of $10 to $50 million. The company produces precision metal parts through sheet metal fabrication, CNC machining, and robotic welding, serving the medical technology, automotive, electric vehicle, aerospace, and industrial equipment sectors. It is privately held. In February 2026, GCM acquired Kettmann Machining, adding capacity to its medical technology manufacturing business.
At a glance
Attribute | Detail |
|---|---|
Founded | 1978 |
Headquarters | Union City, California |
Employees | 200-500 |
Revenue | $10-50M (estimated) |
Primary capability | Metal Fabrication |
Certifications | AS9100 · ISO 13485 · ISO 14001 · ISO 9001 · ITAR registered |
What GCM makes
GCM holds AS9100, ISO 13485, ISO 9001, and ISO 14001 certifications and is registered under ITAR, and its listed capabilities include CNC machining, sheet metal, welding, and tooling.
Products and capabilities described on the company's own site include CNC Machining, Machining, Sheet Metal, Welding, Tooling (source: gogcm.com).
Certifications
GCM is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
AS9100 — gogcm.com
ISO 13485 — gogcm.com
ISO 14001 — gogcm.com
ISO 9001 — gogcm.com
ITAR registered — gogcm.com
Trade and customs footprint
GCM's most recent reported development is its February 2026 acquisition of Kettmann Machining, which was announced as strengthening its position as a manufacturing partner to the MedTech industry. US customs bill-of-lading records list 158 inbound shipments across 7 foreign suppliers, with top origins including China · Hong Kong S.A.R. · Taiwan.
Latest developments
2026-09-25 — GCM Grosvenor to invest up to $100M in Hyperion fund | GCMG Stock News (stocktitan.net)
2026-05-06 — Fort Myers contractor goes global with marina storage niche technology | Business Observer (businessobserverfl.com)
2026-03-02 — Portal Warehousing and GCM Grosvenor Form Long-Term Strategic Partnership to Launch Micro-Bay Industrial Property Venture | GCM Grosvenor (gcmgrosvenor.com)
2026-02-02 — GCM Acquires Kettmann Machining, Solidifying GCM's Position as a Premier Manufacturing Partner to the MedTech Industry (prnewswire.com)
2025-12-08 — Shriteh Family and GCM Contracting Solutions Break Ground on Duffie North, a 10-Acre Industrial Development in Punta Gorda | citybiz (citybiz.co)
2025-06-26 — Goldman Sachs Alternatives Invested in Continuation Fund for GCM - Goldman Sachs Asset Management (gs.com)
Facilities
GCM is headquartered in Union City, California. Public sources also reference these locations:
San Jose, CA — prnewswire.com
Company details
GCM is a privately held company, and its record lists no named customers, so its industry position is best described by the sectors it serves rather than by specific client relationships. GCM was founded in 1978, has an estimated 200-500 employees, and is headquartered in Union City, California. On the LightSource stability read it is rated "Established & active": 48 years in operation (founded 1978). Holds AS9100, ISO 13485, ISO 14001, ISO 9001, ITAR registered certification(s) per public sources.
Frequently asked questions
What does GCM make?
GCM is a precision manufacturer headquartered in Union City, California, founded in 1978 and employing roughly 200 to 500 people, with estimated annual revenue of $10 to $50 million. The company produces precision metal parts through sheet metal fabrication, CNC machining, and robotic welding, serving the medical technology, automotive, electric vehicle, aerospace, and industrial equipment sectors. It is privately held. In February 2026, GCM acquired Kettmann Machining, adding capacity to its medical technology manufacturing business.
Where is GCM headquartered?
GCM is headquartered in Union City, California (1350 Atlantic St, Union City, California, 94587).
When was GCM founded?
GCM was founded in 1978.
How big is GCM?
GCM has an estimated 200-500 employees, with revenue in the $10-50M range (estimated).
What certifications does GCM hold?
GCM lists AS9100 · ISO 13485 · ISO 14001 · ISO 9001 · ITAR registered on its website. Confirm the certified scope for the specific plant producing your part.
Does GCM import from overseas suppliers?
US customs bill-of-lading records show 158 inbound shipments for GCM, with top origins including China · Hong Kong S.A.R. · Taiwan.
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Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Phone
+1 510-475-0404
Certification
AS9100 · ISO 13485 · ISO 14001 · ISO 9001 · ITAR registered
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