Heico vs. TransDigm: A Battle in the Aerospace Arena!

Which Quality Compounder Takes the Crown in this Quick Scan Showdown?

Jun 10, 2025

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Hello, fellow quality investors!

Welcome to this week’s Compound & Fire Quick Scan battle! Today, I pitch two aerospace giants—TransDigm Group ($TDG) and Heico Corporation ($HEI)—against each other to see which company stands out as a quality compounder. Both are leaders in designing and manufacturing aerospace components, but which one offers the edge for long-term value creation? Let’s dive into the numbers and find out!

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Quick Scan Overview: Investment Readiness Scores

I’ve run both companies through my proprietary Quick Scan, assessing them across three key areas: Company Snapshot, Financial Health & Performance, and Shareholder Value & Suitability. Each metric is weighted based on its impact on long-term value creation, contributing to a final Investment Readiness Score (IRS). A score above 80% flags a company as a candidate for in-depth quality investing analysis, shared on Substack and in our global quality investing app on Discord.

Let’s break down the quick scans, compare the results, and declare a winner.

Quick Scan Overview: Heico($HEI)

Heico Corporation is a leading provider of aerospace, defense, and electronic products, balancing organic growth with strategic acquisitions. Key highlights from the Quick Scan include:

Investment Readiness Score (IRS): A robust 83.1%, exceeding the 80% threshold, driven by strong insider ownership (14%) and low stock-based compensation (1%).
Financial Health: A healthy 2.2x Net Debt/EBITDA ratio and exceptional cash flow (143% OCF/Net Income), signaling stability. However, the goodwill balance is at the high end with a 44.5% goodwill versus total assets.
Growth: A solid 10-year revenue CAGR of 14%, with a decent 39% gross margin.

This Quick Scan and the calculation of the IRS score is available in our Discord app

High capital conversion with OCF/Net Income at 143% and a low Capex/Sales ratio of 1.5%, plus high insider ownership at 14%, reflect strong financial discipline and alignment. However, ROIC at 12% sits at the lower end of quality compounders. It’s worth noting that I didn’t adjust Invested Capital for Heico’s high goodwill balance (44.5% of assets), so a deep dive could reveal a better ROIC. Net Debt/EBITDA at an acceptable 2.2x and stock-based compensation (SBC) at just 1% further bolster its profile.

Quick Scan Overview: TransDigm Group ($TDG)

TransDigm Group stands out for its proprietary aerospace components and aggressive acquisition strategy, fueling impressive growth. Standout points include:

Investment Readiness Score (IRS): A solid 74.3%, just below the 80% threshold, with strong growth but lower insider ownership (0.4%).
Capital Efficiency: A comfortable 15.6% ROIC and 122.2% OCF/Net Income, showcasing efficient capital use and cash generation.
Growth: An impressive 10-year revenue CAGR of 12.7%, paired with a high 59% gross margin.

See the detailed breakdown below:

This Quick Scan and the calculation of the IRS score is available in our Discord app

TransDigm shows strong capital efficiency with a 15.6% ROIC and excellent cash conversion (OCF/Net Income at 122.2%), driven by a low Capex/Sales ratio of 2.1%. Its revenue growth is impressive, with a 10-year CAGR of 12.7%, and a high gross margin of 59.0% highlights profitability. However, a high Net Debt/EBITDA of 4.8x and low management ownership (0.4%) weigh on its shareholder alignment, leaving its IRS at 74.3%, just shy of the 80% threshold. Stock-based compensation at 2.7% is reasonable but not optimal.

The Battle: Key Differences and the Winner

This aerospace showdown pits TransDigm’s acquisition-fueled growth against Heico’s balanced stability. Let’s compare the titans!

Financial Health & Performance

Both companies operate with notable debt levels and high goodwill balances, reflecting their acquisition-driven strategies, though their moats in the aerospace sector mitigate some concerns. Financial health is mixed:

TransDigm’s 4.8x Net Debt/EBITDA and Heico’s 2.2x highlight significant leverage, with TransDigm’s higher ratio raising caution despite its strong market position.
In capital efficiency, Heico demonstrates an edge:
- ROIC: TransDigm’s 15.6% outpaces Heico’s 12% at first glance, suggesting better returns on invested capital, though both potential for improvement with a goodwill adjustment warrants further study.
- OCF/Net Income: Heico’s 143% ratio surpasses TransDigm’s 122.2%, reflecting superior cash conversion and a hallmark of high-quality earnings.
- Capex/Sales: Heico’s 1.5% beats TransDigm’s 2.1%, indicating more efficient capital expenditure relative to revenue.

Shareholder Value & Suitability

While both companies have varying levels of shareholder alignment, Heico demonstrates a clearer edge:

Stock-Based Compensation: TransDigm’s 2.7% of revenue is reasonable, but Heico’s 1% is a green flag, as it dilutes shareholder value less.
Share Repurchasing: Heico has seen its outstanding shares increase by 5.85% over the past decade, compared to TransDigm’s 2.1% increase, indicating less aggressive share management. This higher share growth at Heico slightly dilutes per-share value creation, though both companies have not prioritized significant buybacks.
Ownership: Heico’s 14% insider ownership far exceeds TransDigm’s 0.4%, signaling stronger management alignment with shareholders.

The Deciding Factor

TransDigm’s high leverage and lower management ownership put it at a disadvantage, despite its higher ROIC. While its financial performance is impressive, it falls short in delivering the same level of balance sheet stability and shareholder alignment as Heico. The result is clear in the Investment Readiness Scores: TransDigm scores 74.3%, just below my 80% threshold, while Heico scores 83.1%, clearing the hurdle with room to spare.

Winner: HEICO

Strategic Insights

While Heico emerges as the winner based on our Quick Scan, Transdigm’s slight edge in stock performance over the past decade (973.0% total change vs. Heico’s 939.3%) is noteworthy. This can be attributed to Transdigm’s higher risk appetite, including a leverage-heavy strategy, and a superior ROIC of 15.6% compared to Heico’s 12%. The use of debt likely amplified Transdigm’s returns, though it increases vulnerability during economic downturns—a risk Heico’s conservative approach mitigates. This close contest underscores the trade-offs between more aggressive growth and stability, with minimal differences highlighting both as quality compounders. Compound & Fire prefers to avoid losses and minimize risk, and thus is comfortable with Heico’s slightly better risk/reward ratio.

Join the Quality Edge!

It’s important to note that this comparison is based on my Quick Scan, a high-level assessment designed to identify quality investment candidates.

Heico was on my watchlist and will stay there, while TransDigm was not on my watchlist and also didn’t make it to my watchlist.

I’ll be preparing a deep dive analysis on Heico, exploring its growth drivers, competitive moat, and long-term compounding potential. Stay tuned for the full report, which I always share on Substack and in our global quality investing app on Discord.

The aerospace sector is a proving ground for quality, and Heico Corporation has shown itself a worthy contender for quality investors. Until next time, keep compounding!

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Disclaimer

The information in this article is provided for informational and educational purposes only.

The information is not intended to be and does not constitute financial advice or any other advice, is general in nature, and is not specific to you. Before using this article’s information to make an investment decision, you should seek the advice of a qualified and registered securities professional and undertake your own due diligence.

None of the information in this article is intended as investment advice, as an offer or solicitation of an offer to buy or sell, or as a recommendation, endorsement, or sponsorship of any security, company, or fund. The author is not responsible for any investment decision made by you. You are responsible for your own investment research and investment decisions.

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