Honeywell's $125B Breakup: Is Sum Worth More Than Whole?

Honeywell International (HON) has undergone a major restructuring, splitting into three separate companies: Honeywell International itself, Honeywell Aerospace, and Solstice Advanced Materials. The breakup was aimed at allowing each business to focus on its unique needs and price itself effectively in the market.

The combined value of the three companies is around $125 billion, down from $134 billion when they were part of a single entity last year. Honeywell International, the parent company, has seen its stock price rise slightly over the past 12 months to $213.80 per share.

Honeywell Aerospace, on the other hand, has struggled since its separation in June 2026, with its shares falling about 23% over the past year and earnings dropping by a significant 70.90% in the most recent quarter. The company's decision to cut full-year guidance just weeks after separating from Honeywell International has raised concerns about its ability to compete in the market.

The separation of debt between the three companies has also been criticized, as it has led to an increase in overhead costs and a higher burden on each business. Solstice Advanced Materials, one of the new companies, has been the only clear winner since the breakup, with its shares up about 16% over the past year and revenue growth of 11.10%.