Verified Oct 2026
Lighting
·
Portage, Michigan
·
Since 1972
Summit Polymers, Inc., founded in 1972 and headquartered in Portage, Michigan, designs and manufactures injection-molded plastic interior components for the global automotive industry. The company employs over 3,000 people across 11–15 facilities in the US, Mexico, China, and Vietnam with $500 million to $1 billion revenue.
Summit Polymers at a glance
Revenue
$500M-1B
Est. band
Employees
1,000-5,000
Founded
1972
Headquarters
Portage, Michigan
Import activity
3106
Industries
Automotive
Electric Vehicles
Industrial Equipment
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
3106
Named foreign suppliers
47
Top origins
Vietnam · China · South Korea · Hong Kong S.A.R.
Shared foreign counterparties do not establish that these companies buy from Summit Polymers.
What this tells a buyer
Summit sources components from Vietnam (Summit Polymers Vietnam: 1,969 shipments), China (Summit Plastics Nanjing: 2,457 shipments; Yanfeng Automotive: 5,723 shipments), and South Korea (Hanon Systems: 9,504 shipments) across 3,106 total shipments.
Summit holds IATF 16949 and ISO 9001 certifications and performs thermoplastic injection molding, design, and complex assembly with flocking, painting, laser etching, and wrapping finishes.
Summit supplies major OEMs including Ford, General Motors, Toyota, and Volkswagen with interior systems.
Source: US customs bill-of-lading records and public filings · Last verified Oct 29, 2026
STABILITY SIGNALS
Established & active
54 years in operation (founded 1972).
3,106 US import shipments on record.
Overview
Summit Polymers, Inc., founded in 1972 and headquartered in Portage, Michigan, designs and manufactures injection-molded plastic interior components for the global automotive industry. The company employs over 3,000 people across 11–15 facilities in the US, Mexico, China, and Vietnam with $500 million to $1 billion revenue.
At a glance
Attribute | Detail |
|---|---|
Founded | 1972 |
Headquarters | Portage, Michigan |
Employees | 1,000-5,000 |
Revenue | $500M-1B (estimated) |
Primary capability | Lighting |
What Summit Polymers makes
Summit holds IATF 16949 and ISO 9001 certifications and performs thermoplastic injection molding, design, and complex assembly with flocking, painting, laser etching, and wrapping finishes.
Trade and customs footprint
Summit sources components from Vietnam (Summit Polymers Vietnam: 1,969 shipments), China (Summit Plastics Nanjing: 2,457 shipments; Yanfeng Automotive: 5,723 shipments), and South Korea (Hanon Systems: 9,504 shipments) across 3,106 total shipments. US customs bill-of-lading records list 3106 inbound shipments across 47 foreign suppliers, with top origins including Vietnam · China · South Korea · Hong Kong S.A.R..
Company details
Summit supplies major OEMs including Ford, General Motors, Toyota, and Volkswagen with interior systems. Summit Polymers was founded in 1972, has an estimated 1,000-5,000 employees, and is headquartered in Portage, Michigan. On the LightSource stability read it is rated "Established & active": 54 years in operation (founded 1972). 3,106 US import shipments on record.
Frequently asked questions
What does Summit Polymers make?
Summit Polymers, Inc., founded in 1972 and headquartered in Portage, Michigan, designs and manufactures injection-molded plastic interior components for the global automotive industry. The company employs over 3,000 people across 11–15 facilities in the US, Mexico, China, and Vietnam with $500 million to $1 billion revenue.
Where is Summit Polymers headquartered?
Summit Polymers is headquartered in Portage, Michigan (6715 S Sprinkle Rd, Portage, Michigan, 49002).
When was Summit Polymers founded?
Summit Polymers was founded in 1972.
How big is Summit Polymers?
Summit Polymers has an estimated 1,000-5,000 employees, with revenue in the $500M-1B range (estimated).
Does Summit Polymers import from overseas suppliers?
US customs bill-of-lading records show 3106 inbound shipments for Summit Polymers, with top origins including Vietnam · China · South Korea · Hong Kong S.A.R..
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Last verified Oct 2026. Is this your company? Request a correction.
Leadership
Location & contact
Inside the facility
Photos and video: summitpolymers.com
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