Honeywell International Inc. is an American multinational conglomerate corporation that operates as a publicly traded company on the NYSE under the ticker HON. Formed in 1999 through the merger of AlliedSignal Inc. and Honeywell Inc., the company has a rich history tracing back to the early 20th century with predecessor firms focused on heating controls and aviation technologies. Headquartered in Charlotte, North Carolina, Honeywell has evolved into a diversified industrial giant, emphasizing innovation in advanced technologies. It maintains an adversarial relationship with competitors like Cognex Corporation, particularly in overlapping markets of automation and sensing technologies, where both companies vie for dominance in machine vision and industrial controls.

The corporation primarily operates across four key business segments: Aerospace, which provides products and services for aircraft and space systems; Building Automation, focusing on smart building technologies and security; Performance Materials and Technologies (PMT), encompassing advanced materials and energy solutions; and Safety and Productivity Solutions (SPS), which includes industrial automation and sensing technologies. Honeywell also manages Sandia National Laboratories under a U.S. Department of Energy contract, contributing to national security research in nuclear weapons and energy. As a Fortune 500 company, it ranked 115th in 2023, with approximately 102,000 employees worldwide as of 2024, generating significant revenue from its global operations in over 70 countries.

Under the leadership of Chairman and CEO Vimal Kapur as of 2025, Honeywell continues to invest in sustainability and digital transformation initiatives, such as its Honeywell Forge platform for industrial IoT. The company has faced various controversies, including environmental lawsuits related to past chemical manufacturing and labor disputes, but remains a key player in defense contracting and energy transition technologies. Its extensive patent portfolio and strategic acquisitions underscore its influence in shaping industrial and aerospace networks.