HEICO keeps winning the aerospace aftermarket and defense markets
- Flight Support Group is the main engine, with Q3 fiscal 2026 sales up 18% to $947.8 million.
- FSG organic growth hit 12%, led by defense growth in the upper 20s.
- Electronic Technologies Group sustained its momentum, posting 18% organic growth and a 26.0% operating margin.
- The company upsized its credit facility to $3 billion to fund new acquisitions.
- Finn's score is solid, not cheap, meaning the stock needs strong growth to justify the price.
Aftermarket strength and expanding horizons
HEICO is doing exactly what bulls want to see. In Q3 fiscal 2026, the Flight Support Group grew sales 18% to a record $947.8 million, driven by 12% organic growth. Defense organic growth was especially strong, tracking in the upper 20s. Operating margins in the segment also expanded to 25.9%.
The Electronic Technologies Group sustained its momentum. ETG sales rose 36% to $483.5 million, fueled by 18% organic growth. The operating margin held firm at 26.0%. Management also noted structural tailwinds in industrial technology stemming from AI and data center construction.
The bear case has not gone away. Management kept the full-year ETG margin guidance at 22% to 24%, implying a drop in the fourth quarter. Component repair growth also slowed to 5% due to ongoing supply chain bottlenecks for final parts.
The best case is that HEICO keeps gaining share in aerospace aftermarket parts while deploying its newly expanded $3 billion credit facility for deals. The harder case is valuation. Finn's overall view is positive but not extreme, and the valuation score is only middling. A good business can still disappoint if investors pay for peak growth and peak margins.
Small parts, long tails
HEICO makes money by selling specialized parts, repairs, and electronic systems into markets where failure is costly. A broken aircraft component, avionics unit, or defense antenna is not something customers can swap for a cheap unknown part. That gives HEICO room to earn strong margins when its products are approved and trusted.
Flight Support Group sells aftermarket replacement parts, repair and overhaul services, and specialty products for commercial and military aviation. This is the larger segment. It benefits when planes fly more, fleets age, and airlines look for lower-cost parts that still meet strict rules.
Electronic Technologies Group sells high-reliability electronics for defense, space, aerospace, medical, and other demanding uses. It includes signal processing equipment, power supplies, sensors, communication systems, avionics, antennas, and cabin electronics.
Acquisitions are a core part of the model. HEICO often buys focused companies, keeps them close to their niche, and tries to expand them through its network. That can work well, but it also means the story depends on steady deal quality, careful integration, and not overpaying.
Where the parts fit
Aftermarket aircraft parts
FSG sells replacement parts used after an aircraft is built. Q3 demand was strong across product lines, pushing margins higher.
Repair and overhaul services
HEICO repairs mission-critical aviation components instead of only selling new parts. Supply chain delays have recently slowed this category.
Defense, space, and aerospace electronics
ETG sells electronics that must work in harsh or high-stakes settings. Q3 growth came from broad demand, including AI data center construction.
Business and cockpit avionics
Rosen Aviation and Gables Engineering add cockpit displays and avionics panels for navigation, audio, surveillance, and communication.
Industrial gas turbine repair
EthosEnergy gives FSG a new path outside traditional aircraft parts. It targets industrial gas turbine repair, a market helped by rising power demand.
Armored components and high-voltage capacitors
Recent deals for Cook Defence and CalRamic Technologies expand HEICO into track systems for military vehicles and ceramic capacitors.
Two segments, one bigger engine
Segment mix is based on Q3 fiscal 2026 segment net sales before intersegment eliminations: FSG at $947.8 million and ETG at $483.5 million. FSG is larger, so a shift in the commercial aerospace cycle can move the whole company.
What could break the thesis
ETG margins normalize faster than hoped
Medium impact · High oddsETG's Q3 operating margin held strong at 26.0%. Management still expects full-year GAAP operating margins of 22% to 24% for the segment. That implies the margin will drop in the final quarter due to product mix.
Air travel or fleet use weakens
High impact · Medium oddsHEICO relies heavily on commercial aviation demand. Fewer flights, earlier aircraft retirements, or weaker airline spending could reduce demand for aftermarket parts and repairs. This would pressure sales growth.
Supply chain bottlenecks limit throughput
Medium impact · High oddsComponent repair revenue growth was sluggish at 5% in Q3 because of supply chain bottlenecks for final components. If suppliers cannot deliver raw materials or parts, HEICO cannot finish repairs despite strong demand.
Acquisition engine misfires
Medium impact · Medium oddsBuying niche companies is central to HEICO's growth model. The company just upsized its credit facility to $3 billion. If HEICO overpays or fails to integrate a business, the expected growth and margin benefits may not materialize.
In one breath
What does HEICO actually sell?
HEICO sells aircraft replacement parts, repair services, and high-reliability electronics. Its products are used in commercial aviation, defense, space, medical, and other markets where parts need to work under strict standards.
Why do investors care so much about FSG?
FSG is the larger segment and grew Q3 fiscal 2026 sales 18% to $947.8 million. It reached a 25.9% operating margin, which shows strong demand and pricing power in the aftermarket.
Was ETG's recent margin rebound permanent?
ETG posted a 26.0% operating margin in Q3, proving Q2 was not a fluke. However, management kept its full-year guidance at 22% to 24%, meaning they expect some margin reduction in the fourth quarter.
Is HEICO mainly an acquisition story?
Acquisitions are a major part of the story, but the existing businesses are also growing. Q3 results showed 12% organic growth in FSG and 18% organic growth in ETG.
Sources and research notes
This page combines Finn's company research with public filings and other cited materials. The thesis is reviewed when material company information changes; Finn Scores use the latest available scoring data.
- Thesis reviewed
- August 30, 2026
- Score data
- September 6, 2026
- Reviewed by
- Shivam Bharuka
Comparable Aerospace & Defense companies
Companies near HEICO Corporation in Finn's Aerospace & Defense industry ranking.
