HEICO keeps winning the aftermarket
- Flight Support Group is the main engine, with Q2 fiscal 2026 sales up 21% to $929.4 million.
- FSG organic growth was 19%, but $15-20 million of defense sales came earlier than expected.
- Electronic Technologies Group rebounded hard, with 17% organic growth and a 26.5% operating margin in Q2.
- The company still depends on steady air travel, defense budgets, FAA rules, and smart acquisitions.
- Finn's score is solid, not cheap, so the stock still needs strong growth to justify the price.
Aftermarket strength, price still matters
HEICO is doing what bulls want to see. In Q2 fiscal 2026, Flight Support Group grew sales 21% to a record $929.4 million, with 19% organic growth. That means most of the growth came from the existing business, not from buying companies. Its operating margin also reached 26.2%.
The important change was in Electronic Technologies Group. Q1 had raised worries because its margin fell to 19.8%. Q2 answered that concern for now. ETG sales rose 34% to $459.5 million, organic growth was 17%, and operating margin recovered to a record 26.5%.
The bear case has not gone away. FSG got a $15-20 million lift from defense sales that were pulled into Q2 from the second half of the year. Management also still expects ETG's full-year GAAP operating margin to land in a 22% to 24% range, below Q2's record level. That points to some margin giveback later in the year.
The best case is that HEICO keeps gaining share in aerospace aftermarket parts while ETG proves Q1 was a one-off. 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. Q2 demand was strong across product lines, and management raised its long-term FSG margin expectation to 24% to 26%.
Repair and overhaul services
HEICO repairs mission-critical aviation components instead of only selling new parts. Millennium International and Sherwood Avionics & Accessories added more avionics repair depth.
Defense, space, and aerospace electronics
ETG sells electronics that must work in harsh or high-stakes settings. Q2 growth came from higher demand for other electronics, defense, aerospace, and space products.
Business and cockpit avionics
Rosen Aviation added business aircraft cabin displays and controls. Gables Engineering added 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 tied to AI data centers.
Ruggedized antennas
Southwest Antennas expands ETG into rugged antennas for defense and law enforcement. This fits HEICO's pattern of buying focused suppliers in demanding markets.
Two segments, one bigger engine
Segment mix is based on Q2 fiscal 2026 segment net sales before intersegment eliminations: FSG at $929.4 million and ETG at $459.5 million. FSG is larger, so a shift in the commercial aerospace cycle can move the whole company.
What could break the thesis
Aftermarket growth cools
High impact · Medium oddsFSG is the largest segment and the main proof point for the bull case. Q2 organic growth was 19%, but $15-20 million of defense sales were pulled forward from the second half. If growth slows more than expected, investors may decide Q2 was a peak quarter.
ETG margins normalize faster than hoped
Medium impact · High oddsETG's Q2 operating margin was a record 26.5%, a sharp rebound from 19.8% in Q1. Management still expects full-year GAAP operating margin of 22% to 24% for ETG. That means the Q2 level may not last.
Air travel or fleet use weakens
High impact · Medium oddsHEICO depends heavily on commercial aviation demand. Fewer flights, earlier aircraft retirements, or weaker airline spending could reduce demand for aftermarket parts and repairs. That would pressure both sales growth and factory efficiency.
Acquisition engine misfires
Medium impact · Medium oddsBuying niche companies is central to HEICO's growth model. Recent deals include EthosEnergy, Sherwood Avionics & Accessories, and Southwest Antennas. If HEICO overpays or fails to integrate a business, the expected growth and margin benefits may not show up.
Regulatory or supply chain shock
Medium impact · Medium oddsHEICO sells into markets with strict rules, including FAA approvals and international trade controls such as ITAR and EAR. It also depends on key components and raw materials. A rule change, export restriction, or parts shortage could delay shipments.
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 Q2 fiscal 2026 sales 21% to $929.4 million. It also reached a 26.2% operating margin, which shows strong demand and better cost leverage.
Was ETG's Q2 rebound enough to end the concern?
It helped a lot, because ETG grew organically 17% and posted a 26.5% operating margin. The open question is whether that margin can stay high, since management's full-year guide is still 22% to 24%.
Is HEICO mainly an acquisition story?
Acquisitions are a major part of the story, but not the only one. Q2 results also showed strong organic growth, which means the existing businesses were growing before counting new deals.