Honeywell Aerospace Stock Plunges 25% on Casting Shortage and Supply Crunch

Honeywell Aerospace's stock plummeted by 25% after it reported its first quarterly results as an independent company. The Phoenix-based aerospace and defense supplier cut its full-year 2026 growth outlook nearly in half, citing a precision-casting supply crunch that is forcing it to divert scarce manufactured components toward Boeing and Airbus production lines.

The guidance cut was due to a manufacturing process called investment casting, which produces critical aerospace hardware from heat-resistant nickel superalloys and titanium. This process cannot be rushed, as adding new foundries requires 18-36 months of qualification time.

Honeywell Aerospace CEO Jim Currier acknowledged the structural timeline directly, stating that remediation efforts contributed to a 20% quarter-over-quarter output increase at one key supplier through direct personnel embedding.