Verified Nov 2026
Electronics & Software
·
St. Louis, Missouri
·
Since 1922
Watlow is a family-owned industrial technology company headquartered in St. Louis, Missouri, founded in 1922. It designs and manufactures complete thermal system solutions, including electric heaters, temperature sensors, controllers, and supporting software. The company employs between 1,000 and 5,000 people and serves automotive, electric vehicle, electronics, appliance, medical, and plumbing hardware industries. In 2025, it expanded its facility in Malaysia and opened a new technical development center in Bengaluru, India.
Watlow at a glance
Revenue
$1-5B
Est. band
Employees
1,000-5,000
Founded
1922
Headquarters
St. Louis, Missouri
Certifications
ISO 14001 · ISO 45001 · ISO 9001
Import activity
503
Industries
Automotive
Electric Vehicles
Electronics
Appliance
Medical
Plumbing & Hardware
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
503
Named foreign suppliers
49
Top origins
China · United Kingdom · Hong Kong S.A.R. · Germany
Shared foreign counterparties do not establish that these companies buy from Watlow.
What this tells a buyer
Watlow expanded its Malaysia facility in May 2025, as reported by Hydrocarbon Engineering and EIN Presswire.
The company holds ISO 9001, ISO 14001, and ISO 45001 certifications and produces semiconductor-focused thermal management products.
Watlow is privately held, with an estimated annual revenue between $1 billion and $5 billion and operations across the United States, Mexico, Europe, and Asia.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
STABILITY SIGNALS
Established & active
104 years in operation (founded 1922).
Holds ISO 14001, ISO 45001, ISO 9001 certification(s) per public sources.
Overview
Watlow is a family-owned industrial technology company headquartered in St. Louis, Missouri, founded in 1922. It designs and manufactures complete thermal system solutions, including electric heaters, temperature sensors, controllers, and supporting software. The company employs between 1,000 and 5,000 people and serves automotive, electric vehicle, electronics, appliance, medical, and plumbing hardware industries. In 2025, it expanded its facility in Malaysia and opened a new technical development center in Bengaluru, India.
At a glance
Attribute | Detail |
|---|---|
Founded | 1922 |
Headquarters | St. Louis, Missouri |
Employees | 1,000-5,000 |
Revenue | $1-5B (estimated) |
Primary capability | Electronics & Software |
Certifications | ISO 14001 · ISO 45001 · ISO 9001 |
What Watlow makes
The company holds ISO 9001, ISO 14001, and ISO 45001 certifications and produces semiconductor-focused thermal management products.
Products and capabilities described on the company's own site include Semiconductor (source: watlow.com).
Certifications
Watlow is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 14001 — watlow.com
ISO 45001 — watlow.com
ISO 9001 — watlow.com
Trade and customs footprint
Watlow expanded its Malaysia facility in May 2025, as reported by Hydrocarbon Engineering and EIN Presswire. US customs bill-of-lading records list 503 inbound shipments across 49 foreign suppliers, with top origins including China · United Kingdom · Hong Kong S.A.R. · Germany.
Latest developments
2026-06-04 — Big news: Watlow is growing, and so is what's possible in semiconductor thermal management. | Watlow (linkedin.com)
2025-05-02 — Watlow expands facility in Malaysia | Hydrocarbon Engineering (hydrocarbonengineering.com)
2025-05-01 — Watlow® Accelerates Growth in Malaysia with Expanded Facility & Long-Term Commitment to SE Asia’s Industrial Innovation (einpresswire.com)
2025-04-29 — Watlow® Opens a New Bangalore Office to Drive Innovation and Sustainability in India's Growing Thermal Solutions Market (einpresswire.com)
2025-04-08 — MACHINIST.IN » Watlow Opens New Technical Development Center in Bengaluru (machinist.in)
2025-01-06 — News | Watlow (watlow.com)
Facilities
Watlow is headquartered in St. Louis, Missouri. Public sources also reference these locations:
Bengaluru, India — machinist.in
Malaysia — machinist.in
Ledziny, Poland — watlow.com
Company details
Watlow is privately held, with an estimated annual revenue between $1 billion and $5 billion and operations across the United States, Mexico, Europe, and Asia. Watlow was founded in 1922, has an estimated 1,000-5,000 employees, and is headquartered in St. Louis, Missouri. On the LightSource stability read it is rated "Established & active": 104 years in operation (founded 1922). Holds ISO 14001, ISO 45001, ISO 9001 certification(s) per public sources.
Frequently asked questions
What does Watlow make?
Watlow is a family-owned industrial technology company headquartered in St. Louis, Missouri, founded in 1922. It designs and manufactures complete thermal system solutions, including electric heaters, temperature sensors, controllers, and supporting software. The company employs between 1,000 and 5,000 people and serves automotive, electric vehicle, electronics, appliance, medical, and plumbing hardware industries. In 2025, it expanded its facility in Malaysia and opened a new technical development center in Bengaluru, India.
Where is Watlow headquartered?
Watlow is headquartered in St. Louis, Missouri (12001 Lackland Road, St. Louis, Missouri, 63146).
When was Watlow founded?
Watlow was founded in 1922.
How big is Watlow?
Watlow has an estimated 1,000-5,000 employees, with revenue in the $1-5B range (estimated).
What certifications does Watlow hold?
Watlow lists ISO 14001 · ISO 45001 · ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
Does Watlow import from overseas suppliers?
US customs bill-of-lading records show 503 inbound shipments for Watlow, with top origins including China · United Kingdom · Hong Kong S.A.R. · Germany.
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Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Phone
'+1 314-878-4600
Certification
ISO 14001 · ISO 45001 · ISO 9001
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