Business Overview: HEICO Corporation (NYSE: HEI)

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Executive Summary

HEICO Corporation is an aerospace, defense, and electronics manufacturer headquartered in Hollywood, Florida, organized in its current form in 1957 and run for decades under the Mendelson family's leadership. HEICO describes itself as the world's largest manufacturer of FAA-approved jet engine and aircraft component replacement parts other than the original equipment manufacturers (OEMs) themselves — a niche known as PMA (Parts Manufacturer Approval) parts. Alongside that core aftermarket parts business, it designs and builds specialty electronic, microwave, and electro-optical products for aviation, defense, space, medical, and telecommunications customers.

HEICO matters because it has quietly become one of the most consistent compounders in industrial America: net sales have grown from $26.2 million in fiscal 1990 to $4.49 billion in fiscal 2025 (roughly a 16% compound annual growth rate), driven by a combination of organic aftermarket growth and a disciplined, decentralized acquisition strategy — about 107 acquisitions since 1990. Its market capitalization (around $41 billion as of late 2026) dwarfs its revenue base, reflecting a market view that HEICO's aftermarket parts moat and M&A engine are both unusually durable.

As of fiscal year-end (October 31, 2025), HEICO employed roughly 11,100 people, generated $690.4 million in net income, and sold to customers in approximately 130 countries, with foreign sales representing about 38% of the total.

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1. Core Business Model & How They Work

HEICO's core insight is structural: airlines and aircraft operators are legally required to maintain their fleets to strict airworthiness standards, but they are not required to buy replacement parts exclusively from the original engine or airframe manufacturer. The FAA's PMA process lets a qualified third party design, test, certify, and sell a replacement part that is form-, fit-, and function-equivalent to the OEM part — typically at a meaningful discount to OEM pricing. HEICO has spent decades building the engineering talent, FAA relationships, and parts catalog needed to do this at scale, which is what makes the business difficult to replicate quickly.

  Aircraft/Engine OEMs make part  ➡️  HEICO reverse-engineers & tests equivalent part
         (expensive)                         (FAA PMA / DER-PMA approval)
                                                      ⬇️
                              HEICO manufactures, repairs, or overhauls part
                                                      ⬇️
         Airlines, MROs, leasing companies, militaries buy at a discount to OEM
                                                      ⬇️
          Recurring aftermarket demand as aircraft fleets age and fly more hours
                                                      ⬇️
     Cash flow redeployed into ~107 bolt-on acquisitions since 1990 (decentralized model)

HEICO's acquisition model is itself part of the business model: acquired companies are generally kept largely intact and run by their existing management under a HEICO holding structure, rather than being merged into a single corporate machine. This has let HEICO buy niche, founder-run aerospace and electronics businesses repeatedly without the integration risk that sinks many serial acquirers.

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2. Business Segments

                         HEICO CORPORATION
                                 |
             ---------------------------------------
             |                                     |
   Flight Support Group (FSG)          Electronic Technologies Group (ETG)
      ~70% of FY2025 net sales              ~30% of FY2025 net sales
             |                                     |
   - PMA replacement parts               - Infrared simulation/test equipment
   - Repair & overhaul (MRO)             - Laser rangefinder receivers
   - Parts distribution                  - Power supplies & memory products
   - Military parts & support            - RF/microwave components & connectors
   - Specialty mfg. for OEMs/government   - Avionics components
     (thermal insulation, composites,     - Underwater locator beacons
      lightning-strike protection,
      emergency descent devices)

Flight Support Group (FSG)

FSG is the heart of HEICO's aftermarket moat: FAA-approved replacement parts and proprietary repairs sold at lower prices than OEM parts, plus overhaul and parts-exchange programs for jet engine and aircraft components, avionics, and instruments. It also manufactures specialty parts as a subcontractor to OEMs and the U.S. government — thermal insulation, composite structures, lightning-strike protection mesh, and emergency descent devices/parachutes — and supplies parts and support to the U.S. Department of Defense and allied militaries.

Electronic Technologies Group (ETG)

ETG makes niche electronic, data, microwave, and electro-optical products for aviation, defense, space, medical, and other markets. Roughly 51% of ETG's fiscal 2025 sales came from military agencies, defense prime contractors, and satellite/spacecraft manufacturers, giving HEICO meaningful defense and space exposure that diversifies it away from pure commercial-aviation cyclicality.

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3. Key Offerings

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4. Competitive Landscape

In FSG (PMA parts & MRO): HEICO's direct competition is less other PMA makers and more the OEMs themselves — GE Aerospace, RTX (Pratt & Whitney and Collins Aerospace), and Safran — who would prefer airlines buy only factory-new parts, plus airlines' own in-house maintenance shops and independent MRO providers. Competition here is fought on price, turnaround time, and service, not on being the cheapest-possible generic supplier, since FAA certification is itself a gating factor that keeps most would-be competitors out.

In ETG (niche electronics): Competitors include larger diversified defense/electronics players such as L3Harris, Teledyne Technologies, and Curtiss-Wright, most of which are larger than any single HEICO ETG subsidiary but do not focus as intensely on HEICO's specific niches.

                    High Switching Cost / Qualified-Only
                              (certified parts, sole-source)
                                        |
      OEM Pricing  -----------------------------------------  Discount Pricing
   (GE Aerospace,                      |                    (HEICO PMA/MRO,
   RTX/Collins,                        |                     independent
   Safran)                            |                     repair shops)
                                        |
                    Low Switching Cost / Commodity Hardware

HEICO sits firmly in the "certified, but discounted" quadrant — a position that is hard for low-cost generic manufacturers to enter (they lack FAA approval) and hard for OEMs to fully counter (they have higher cost structures and, in many markets, face antitrust limits on how aggressively they can block PMA competition through service agreements).

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5. Strategic Strengths & Risks

Strengths

• Regulatory moat: FAA PMA/DER-PMA certification is slow, expensive, and requires deep engineering and testing capability — a real barrier that has kept HEICO's share of the independent aftermarket parts market unusually concentrated.
• Decentralized M&A playbook: Letting acquired founder-led businesses keep operating with their own management has let HEICO complete ~107 acquisitions since 1990 with low integration risk, compounding both revenue and know-how.
• Diversified end-markets: Commercial aviation aftermarket, defense, space, and medical electronics exposure reduces reliance on any single cycle.
• Long product lifecycles: Once a part or component is designed into an aircraft or defense platform, re-qualifying an alternative is costly and slow for the customer, creating real switching costs.

Risks

• OEM pushback: Engine and airframe OEMs increasingly use long-term service agreements (LTSAs) and engine leasing/power-by-the-hour contracts that can effectively lock airlines out of using PMA parts, a structural threat to FSG's core model.
• Valuation risk: At roughly 49x trailing earnings, HEICO's stock prices in years of continued execution; any stumble in margins or acquisition returns could compress the multiple sharply.
• Key-person/succession risk: The Mendelson family (Laurans, Eric, and Victor Mendelson) has led HEICO for decades; leadership transition is a real, if distant, risk for a culture-dependent M&A model.
• Commercial aviation cyclicality and defense budget risk: A sharp drop in flight hours (as in 2020) or a defense budget pullback would hit both segments.

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6. Financial Overview

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Summary Conclusion

HEICO has built one of the more durable moats in industrial America by sitting in a regulatory gap that OEMs cannot close and generic manufacturers cannot enter: FAA-approved, below-OEM-price replacement parts for an aircraft fleet that must, by law, stay airworthy. That aftermarket engine, combined with a disciplined and unusually non-disruptive acquisition strategy, has compounded revenue and earnings for over three decades. The clearest forward risk is not competitive imitation but OEM contracting strategy — as engine makers push airlines into long-term service agreements that structurally exclude PMA parts, HEICO's core FSG growth engine could face slower expansion even as its electronics (ETG) business continues to ride defense and space tailwinds.