Gentex Corp. GNTX

What this company does

Gentex Corporation designs, develops, manufactures, markets, and supplies digital vision, connected car, premium audio, dimmable glass, fire protection, medical device, and consumer electronic technologies, including automatic-dimming and non-automatic-dimming rearview mirrors and electronics for the automotive industry, sound equipment and other electronic products for the consumer electronics industry, dimmable aircraft windows for the aviation industry, and commercial smoke alarms and signaling devices for the fire protection industry. Automotive rearview mirrors and electronics accounted for 89% of its consolidated net sales in 2025. As of December 31, 2025, it had 6,398 full-time employees. Its largest business segment involves designing, developing, manufacturing and marketing interior and exterior automatic-dimming automotive rearview mirrors that utilize proprietary electrochromic technology to dim in proportion to the amount of headlight glare from trailing vehicle headlamps. It continues to manufacture and sell variable dimmable windows for the passenger compartment on the Boeing 787 Dreamliner series of aircraft. It manufactures photoelectric smoke detectors and alarms, visual signaling alarms, photoelectric smoke alarms and electrochemical carbon monoxide alarms and detectors, audible and visual signaling appliances, and bells and speakers for use in fire detection systems in office buildings, hotels, and other commercial and residential establishments. Gentex Corporation was incorporated as a Michigan corporation in 1974.

Written from the business description in GENTEX CORP's annual report to the U.S. Securities and Exchange Commission, filed 24 February 2026. Every sentence was checked against that document before publication.