Verified Nov 2026
Thermal & Fluid Systems
·
Oakbrook Terrace, Illinois
·
Since 1942
Filtration Group manufactures filtration and separation products for air, gas, liquid, and process applications, with a primary capability in thermal and fluid systems. The company is headquartered in Oakbrook Terrace, Illinois, was founded in 1942, and employs roughly 5,000 to 10,000 people, with estimated revenue of $1 billion to $5 billion. It is privately held and serves the automotive, electric vehicle, electronics, medical, renewable energy, and industrial equipment sectors. Parker Hannifin completed its acquisition of the company in August 2026, according to a company announcement.
Filtration Group at a glance
Revenue
$1-5B
Est. band
Employees
5,000-10,000
Founded
1942
Headquarters
Oakbrook Terrace, Illinois
Certifications
ISO 9001
Import activity
351
Industries
Automotive
Electric Vehicles
Electronics
Medical
Renewable Energy
Industrial Equipment
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
351
Named foreign suppliers
37
Top origins
United Kingdom · Netherlands · South Korea · China
Shared foreign counterparties do not establish that these companies buy from Filtration Group.
What this tells a buyer
Filtration Group was upgraded to 'BBB+' from 'B' by S&P Global Ratings in August 2026, according to a report from S&P Global Ratings.
The company holds ISO 9001 certification and lists LED among its products in public web listings.
Filtration Group agreed in February 2026 to be acquired by Parker Hannifin, a transaction the Australian Competition and Consumer Commission reviewed and that Parker completed in August 2026.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
STABILITY SIGNALS
Established & active
84 years in operation (founded 1942).
351 US import shipments on record.
Holds ISO 9001 certification(s) per public sources.
Overview
Filtration Group manufactures filtration and separation products for air, gas, liquid, and process applications, with a primary capability in thermal and fluid systems. The company is headquartered in Oakbrook Terrace, Illinois, was founded in 1942, and employs roughly 5,000 to 10,000 people, with estimated revenue of $1 billion to $5 billion. It is privately held and serves the automotive, electric vehicle, electronics, medical, renewable energy, and industrial equipment sectors. Parker Hannifin completed its acquisition of the company in August 2026, according to a company announcement.
At a glance
Attribute | Detail |
|---|---|
Founded | 1942 |
Headquarters | Oakbrook Terrace, Illinois |
Employees | 5,000-10,000 |
Revenue | $1-5B (estimated) |
Primary capability | Thermal & Fluid Systems |
Certifications | ISO 9001 |
What Filtration Group makes
The company holds ISO 9001 certification and lists LED among its products in public web listings.
Products and capabilities described on the company's own site include LED (source: filtrationgroup.com).
Certifications
Filtration Group is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 9001 — filtrationgroup.com
Trade and customs footprint
Filtration Group was upgraded to 'BBB+' from 'B' by S&P Global Ratings in August 2026, according to a report from S&P Global Ratings. US customs bill-of-lading records list 351 inbound shipments across 37 foreign suppliers, with top origins including United Kingdom · Netherlands · South Korea · China.
Latest developments
2026-08-17 — Filtration Group Corp. Upgraded To 'BBB+' From 'B | S&P Global Ratings (spglobal.com)
2026-08-13 — Parker Completes Acquisition of Filtration Group Corporation - Filtration Group (filtrationgroup.com)
2026-02-05 — Parker-Hannifin – Filtration Group | ACCC (accc.gov.au)
2026-02-02 — Facet to Join Donaldson - Filtration Group (filtrationgroup.com)
2026-02-02 — Donaldson Company, Inc. - Donaldson to Acquire Facet, an Innovator in Mission-Critical Fuel and Fluid Filtration Solutions (donaldson.com)
2025-11-11 — Filtration Group to Join Parker-Hannifin Corporation - Filtration Group (filtrationgroup.com)
Company details
Filtration Group agreed in February 2026 to be acquired by Parker Hannifin, a transaction the Australian Competition and Consumer Commission reviewed and that Parker completed in August 2026. Filtration Group was founded in 1942, has an estimated 5,000-10,000 employees, and is headquartered in Oakbrook Terrace, Illinois. On the LightSource stability read it is rated "Established & active": 84 years in operation (founded 1942). 351 US import shipments on record. Holds ISO 9001 certification(s) per public sources.
Frequently asked questions
What does Filtration Group make?
Filtration Group manufactures filtration and separation products for air, gas, liquid, and process applications, with a primary capability in thermal and fluid systems. The company is headquartered in Oakbrook Terrace, Illinois, was founded in 1942, and employs roughly 5,000 to 10,000 people, with estimated revenue of $1 billion to $5 billion. It is privately held and serves the automotive, electric vehicle, electronics, medical, renewable energy, and industrial equipment sectors. Parker Hannifin completed its acquisition of the company in August 2026, according to a company announcement.
Where is Filtration Group headquartered?
Filtration Group is headquartered in Oakbrook Terrace, Illinois (1 Tower Lane, Oakbrook Terrace, Illinois, 60181).
When was Filtration Group founded?
Filtration Group was founded in 1942.
How big is Filtration Group?
Filtration Group has an estimated 5,000-10,000 employees, with revenue in the $1-5B range (estimated).
What certifications does Filtration Group hold?
Filtration Group lists ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
Does Filtration Group import from overseas suppliers?
US customs bill-of-lading records show 351 inbound shipments for Filtration Group, with top origins including United Kingdom · Netherlands · South Korea · China.
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Last verified Nov 2026. Is this your company? Request a correction.
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