Verified Nov 2026
Metal Fabrication
·
Gratz, Pennsylvania
·
Since 1947
MI Windows and Doors makes vinyl and aluminum windows and sliding patio doors for new construction and replacement markets. The company is headquartered in Gratz, Pennsylvania, was founded in 1947, and reports an estimated 1,000 to 5,000 employees with an estimated annual revenue band of $500 million to $1 billion. It is privately held and serves the automotive, construction, plumbing-hardware, renewable-energy, and industrial-equipment sectors. Among its recent announcements, the company launched the VX4500 and AX4500 Moving Glass Walls, as reported by MITER Brands.
MI Windows and Doors at a glance
Revenue
$500M-1B
Est. band
Employees
1,000-5,000
Founded
1947
Headquarters
Gratz, Pennsylvania
Import activity
6
Industries
Automotive
Electric Vehicles
Construction
Plumbing & Hardware
Renewable Energy
Industrial Equipment
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
6
Named foreign suppliers
6
Top origins
Portugal · Germany · Belgium · Italy
Shared foreign counterparties do not establish that these companies buy from MI Windows and Doors.
What this tells a buyer
The record contains no customs data, and the most recent public development is the launch of the VX4500 and AX4500 Moving Glass Walls, reported on October 1, 2026.
The company lists aluminum and glass among its products and operates fabrication facilities in Pennsylvania and Texas, with a further plant in Arizona noted in its public description.
MI Windows and Doors is a private company with an estimated revenue band of $500 million to $1 billion, and it is part of the MITER Brands family.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
Overview
MI Windows and Doors makes vinyl and aluminum windows and sliding patio doors for new construction and replacement markets. The company is headquartered in Gratz, Pennsylvania, was founded in 1947, and reports an estimated 1,000 to 5,000 employees with an estimated annual revenue band of $500 million to $1 billion. It is privately held and serves the automotive, construction, plumbing-hardware, renewable-energy, and industrial-equipment sectors. Among its recent announcements, the company launched the VX4500 and AX4500 Moving Glass Walls, as reported by MITER Brands.
At a glance
Attribute | Detail |
|---|---|
Founded | 1947 |
Headquarters | Gratz, Pennsylvania |
Employees | 1,000-5,000 |
Revenue | $500M-1B (estimated) |
Primary capability | Metal Fabrication |
What MI Windows and Doors makes
The company lists aluminum and glass among its products and operates fabrication facilities in Pennsylvania and Texas, with a further plant in Arizona noted in its public description.
Products and capabilities described on the company's own site include Aluminum, Glass (source: miwindows.com).
Trade and customs footprint
The record contains no customs data, and the most recent public development is the launch of the VX4500 and AX4500 Moving Glass Walls, reported on October 1, 2026. US customs bill-of-lading records list 6 inbound shipments across 6 foreign suppliers, with top origins including Portugal · Germany · Belgium · Italy.
Latest developments
2026-10-01 — MI Windows and Doors launches VX4500 and AX4500 Moving Glass Walls | MITER Brands™ (miterbrands.com)
2026-06-01 — MI Windows and Doors Launches New Carbonite Collection | MITER Brands™ (miterbrands.com)
2026-03-11 — Exciting news for MI Windows and Doors. | MI Windows and Doors (linkedin.com)
2026-02-11 — MI Windows and Doors and MITER Foundation partner with Penn State Athletics to support THON™ and Four Diamonds (businesswire.com)
2025-11-10 — MI Windows and Doors Archives (dwmmag.com)
2025-09-11 — Proud to share that The Right Products Group is now partnered with MI Windows! 🪟 | Matthew Ambriz (linkedin.com)
Facilities
MI Windows and Doors is headquartered in Gratz, Pennsylvania. Public sources also reference these locations:
Texas — miwindows.com
Pennsylvania — miwindows.com
Pennsylvania, Texas — miwindows.com
Gratz, PA — miwindows.com
Company details
MI Windows and Doors is a private company with an estimated revenue band of $500 million to $1 billion, and it is part of the MITER Brands family. MI Windows and Doors was founded in 1947, has an estimated 1,000-5,000 employees, and is headquartered in Gratz, Pennsylvania.
Frequently asked questions
What does MI Windows and Doors make?
MI Windows and Doors makes vinyl and aluminum windows and sliding patio doors for new construction and replacement markets. The company is headquartered in Gratz, Pennsylvania, was founded in 1947, and reports an estimated 1,000 to 5,000 employees with an estimated annual revenue band of $500 million to $1 billion. It is privately held and serves the automotive, construction, plumbing-hardware, renewable-energy, and industrial-equipment sectors. Among its recent announcements, the company launched the VX4500 and AX4500 Moving Glass Walls, as reported by MITER Brands.
Where is MI Windows and Doors headquartered?
MI Windows and Doors is headquartered in Gratz, Pennsylvania (650 W Market St, Gratz, Pennsylvania, 17030).
When was MI Windows and Doors founded?
MI Windows and Doors was founded in 1947.
How big is MI Windows and Doors?
MI Windows and Doors has an estimated 1,000-5,000 employees, with revenue in the $500M-1B range (estimated).
Does MI Windows and Doors import from overseas suppliers?
US customs bill-of-lading records show 6 inbound shipments for MI Windows and Doors, with top origins including Portugal · Germany · Belgium · Italy.
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Last verified Nov 2026. Is this your company? Request a correction.
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