Honeywell Aerospace (HONA) stock plunged 20.8% in early trading on Thursday after reporting its first earnings since spinning off from parent company Honeywell (HON) in June. The company reported Q2 2026 pro forma earnings per share of $1.87, missing analysts' expectations of $2.13. Revenue for the quarter was $4.5 billion. Additionally, Honeywell Aerospace adopted a conservative stance in its guidance, lowering expectations to no more than 5% sales growth in the second half of the year.