Executive Summary
Rating: SELL | SKYH
Sky Harbour Group Corp. is a niche aviation infrastructure developer whose equity case hinges on lease-up execution rather than current earnings power. The stock screens as expensive at 29.5x EV/revenue and 23.4x price/sales, while TTM operating margin remains -0.8% and levered free cash flow is -$153.5M. The investment case is supported by a structurally scarce asset base and long-duration rental contracts, but the key risk is that leverage and negative cash generation leave little margin for delay in refinancing or project delivery. The near-term catalyst is continued conversion of airport scarcity into funded hangar deliveries and higher recurring revenue.
Investment Rating
Rating: SELL
Sky Harbour trades at 29.5x EV/revenue and 23.4x price/sales despite TTM operating margin of -0.8% and levered free cash flow of -$153.5M. The balance sheet carries $555.9M of total debt and total debt/equity of 336.9%, so the equity remains highly sensitive to execution and capital-market access. Revenue growth is visible, but the current valuation already discounts a successful lease-up path that is not yet reflected in profitability or cash flow.
Company Profile
Sky Harbour Group Corp. develops, leases, and manages general aviation hangars through Home Base Operator campuses designed for business aircraft. Revenue is primarily generated from long-term rental agreements tied to hangar occupancy. The company was founded in 2017, went public through a SPAC transaction, and has expanded by replicating prototype hangar designs across U.S. airports. Its strategy targets airports with based-aircraft concentrations and hangar shortages, where waiting lists can extend for years. Sky Harbour’s Class A Common Stock and Public Warrants trade on the New York Stock Exchange under SKYH and SKYH WS.
Economic Moat
Sky Harbour’s moat is not brand-based; it is built around site-specific development execution and constrained airport real estate. The company’s standardized hangar design, centralized procurement, and in-house construction management reduce development complexity and make each campus easier to replicate once approvals are secured. The more durable advantage is contractual: long-term rental agreements create revenue visibility once a campus is stabilized. The moat is strongest where airport supply is structurally tight and larger business aircraft require specialized hangar characteristics that are difficult to replace quickly.
Business Model
The business model depends on securing airport ground leases, financing construction, and then monetizing hangar capacity through long-duration rentals. Sky Harbour’s value proposition is that it can create purpose-built aviation infrastructure in markets where hangar supply is constrained and new development is slow. That model should support recurring revenue once occupancy ramps, but it also requires repeated capital deployment before cash flow turns durable.
Risk Factors
Refinancing and covenant risk is a high-severity risk. The $150.0M Series 2026 Bonds carry a mandatory tender on January 1, 2031, and the $200.0M Term Loan Facility matures on September 4, 2030. The Term Loan also steps to a 1.3x DSCR test starting three months after September 4, 2028 or project completion. If refinancing is delayed or unavailable, distributions could be constrained and asset sales may be required.
Ground-lease execution risk is a high-severity risk. The company must secure airport authority approvals and acceptable lease economics to keep projects on schedule. LGB covers 17.0 acres and FTW covers 4.5 acres, but if negotiations slip or lease costs rise, project returns and growth visibility weaken.
Construction cost and schedule risk is a medium-severity risk. Steel, concrete, and labor inflation can push projects above GMP budgets, and delays would defer rent commencement. That would also pressure returns on the $349.8M of constructed assets and could force write-downs if project economics deteriorate.
Management Discussion & Analysis
Management is signaling a capital-intensive expansion strategy funded through debt and equity access. The $150.0M Series 2026 Bonds, the $200.0M Term Loan Facility, and the $100.0M ATM Facility are being used to support the 2026 projects and the broader 50-airport plan. Management has framed the long-term opportunity at $3.0B and roughly 200,000 rentable square feet per campus. The key issue is funding discipline: the company is still dependent on external capital to keep the buildout moving.
Recent Earnings
The latest quarter shows stronger revenue but weaker profitability. Revenue rose to $8.7M in 2026-03-31 from $8.1M in 2025-12-31, while EBITDA fell to -$5.9M from $9.2M over the same period. Net income moved to -$5.6M from $9.6M. The Q1 2026 swing in EBITDA has no clear driver identified in the available documentation; investors should seek further disclosure. The revenue trend remains constructive, but the earnings volatility suggests the business is still sensitive to project timing and cost absorption.
Financial Analysis
Growth
SKYH — Financial Growth (Quarterly, USD Mil)
Source: Yahoo Finance — Quarterly Financial Statements
| Metric | 2024-09-30 | 2025-03-31 | 2025-06-30 | 2025-09-30 | 2025-12-31 | 2026-03-31 |
|---|---|---|---|---|---|---|
| REVENUE (USD Mil) | — | 5.593 | 6.588 | 7.302 | 8.057 | 8.725 |
| EBIT (USD Mil) | — | -8.988 | 14.489 | -4.373 | 7.195 | -7.938 |
| EBITDA (USD Mil) | — | -7.889 | 16.021 | -2.593 | 9.164 | -5.945 |
| NET INCOME (USD Mil) | — | -6.376 | 17.453 | -1.878 | 9.619 | -5.578 |
| DILUTED EPS | -0.740 | -0.190 | 0.180 | -0.060 | — | -0.160 |
Revenue increased from $5.6M in 2025-03-31 to $8.7M in 2026-03-31, with intermediate periods showing $6.6M in 2025-06-30, $7.3M in 2025-09-30, and $8.1M in 2025-12-31. That is a clear step-up in top-line scale across the last four reported quarters. EBIT and EBITDA were much more volatile than revenue, moving from -$9.0M and -$7.9M in 2025-03-31 to $14.5M and $16.0M in 2025-06-30, then back to -$7.9M and -$5.9M in 2026-03-31. Net income followed the same pattern, ranging from -$6.4M to $17.5M and then back to -$5.6M. The growth profile is real, but the earnings path is not yet stable.
Profitability
SKYH — Profitability (TTM)
Source: Yahoo Finance — Trailing Twelve Months (TTM)
| Metric | TTM |
|---|---|
| Operating Margin (TTM) | -0.799 |
| Net Margin (TTM) | 0.640 |
| Return on Assets (TTM) | -0.027 |
| Return on Equity (TTM) | 0.047 |
TTM operating margin was -0.8%, TTM net margin was 0.6%, TTM return on assets was -0.0%, and TTM return on equity was 0.0%. The negative operating margin indicates the business is still not generating consistent operating profit on a trailing basis. Net margin is positive but thin, and both ROA and ROE remain near breakeven. The profitability profile therefore reflects an early-stage platform that is still absorbing development and financing costs.
Valuation
SKYH — Valuation Multiples
Source: Yahoo Finance
| Metric | Value |
|---|---|
| Market Cap (USD Mil) | 716.302 |
| Enterprise Value (USD Mil) | 905.631 |
| Trailing P/E | 78.000 |
| Forward P/E | -49.263 |
| Price/Sales (TTM) | 23.354 |
| Price/Book (mrq) | 2.582 |
| EV/Revenue | 29.526 |
| EV/EBITDA | -43.330 |
| Beta (5Y Monthly) | 1.317 |
Sky Harbour trades at 78.0x trailing P/E and -49.3x forward P/E, with EV/revenue at 29.5x and price/sales at 23.4x. EV/EBITDA is -43.3x, which makes earnings-based valuation less informative in the near term. Market cap is $716.0M and enterprise value is $906.0M. Beta is 1.3x, indicating the stock has historically moved with above-market volatility. The valuation implies investors are paying for future lease-up and stabilization rather than current earnings.
Leverage
SKYH — Leverage & Coverage (Quarterly)
Source: Yahoo Finance — Quarterly Financial Statements
| Metric | Value |
|---|---|
| Total Debt/Equity % (mrq) | 336.869 |
| Current Ratio (mrq) | 3.044 |
| Total Debt (mrq, USD Mil) | 555.877 |
| Operating Cash Flow (TTM, USD Mil) | -1.204 |
| Levered Free Cash Flow (TTM, USD Mil) | -153.499 |
Total debt/equity was 336.9% as of the most recent quarter, with a current ratio of 3.0x and total debt of $555.9M. TTM operating cash flow was -$1.2M and levered free cash flow was -$153.5M. The balance sheet therefore has liquidity support, but cash generation remains negative. That combination leaves the equity dependent on continued access to financing until projects mature into stable recurring cash flow.
Comparable Analysis
Sky Harbour is expensive relative to airport operators on every sales-based metric. EV/revenue is 29.5x versus 2.3x for CAAP, 0.9x for OMAB, 1.0x for ASR, and 4.8x for PAC. Price/sales is 23.4x versus 2.1x, 0.3x, 0.2x, and 0.4x, respectively. Trailing P/E is 78.0x versus 14.8x for CAAP, 15.7x for OMAB, 15.3x for ASR, and 20.3x for PAC.
Profitability also trails peers. Sky Harbour’s TTM operating margin is -0.8%, versus 23.5% for CAAP, 54.5% for OMAB, 52.9% for ASR, and 44.5% for PAC. TTM return on equity is 0.0% for SKYH versus 16.2% for CAAP, 43.4% for OMAB, 17.8% for ASR, and 37.6% for PAC. On leverage, SKYH’s total debt/equity of 336.9% is above CAAP at 66.5%, OMAB at 107.2%, ASR at 71.5%, and PAC at 226.3%. The peer set underscores that SKYH is priced for a much earlier-stage growth and monetization profile.
Growth
| Company | Revenue TTM (USD Mil) | Revenue Growth YoY % | EBITDA TTM (USD Mil) | Diluted EPS TTM |
|---|---|---|---|---|
| SKYH | 30.670 | 0.560 | -20.900 | 0.120 |
| CAAP | 1,962.130 | 0.188 | 713.070 | 1.740 |
| OMAB | 16,211.970 | 0.069 | 9,766.680 | 6.200 |
| ASR | 37,308.010 | 0.008 | 19,997.180 | 18.460 |
| PAC | 32,840.350 | 0.028 | 21,663.280 | 11.220 |
Valuation
| Company | Trailing P/E | Forward P/E | EV/Revenue | EV/EBITDA | Price/Sales (TTM) | Price/Book (mrq) | Market Cap (USD Mil) | Enterprise Value (USD Mil) | Beta (5Y Monthly) |
|---|---|---|---|---|---|---|---|---|---|
| SKYH | 78.000 | -49.263 | 29.526 | -43.330 | 23.354 | 2.582 | 716.300 | 905.630 | 1.317 |
| CAAP | 14.764 | 11.346 | 2.327 | 6.402 | 2.137 | 2.642 | 4,193.190 | 4,564.950 | 0.679 |
| OMAB | 15.656 | 10.971 | 0.911 | 1.512 | 0.289 | 7.183 | 4,685.680 | 14,765.840 | 0.356 |
| ASR | 15.259 | 11.093 | 0.993 | 1.852 | 0.227 | 3.483 | 8,459.580 | 37,030.810 | 0.183 |
| PAC | 20.292 | 15.363 | 4.768 | 7.228 | 0.413 | 1,122.911 | 13,547.370 | 156,579.020 | 0.246 |
Profitability
| Company | Operating Margin (TTM) | Net Margin (TTM) | Return on Assets (TTM) | Return on Equity (TTM) |
|---|---|---|---|---|
| SKYH | -0.799 | 0.640 | -0.027 | 0.047 |
| CAAP | 0.235 | 0.126 | 0.071 | 0.162 |
| OMAB | 0.545 | 0.326 | 0.184 | 0.434 |
| ASR | 0.529 | 0.262 | 0.116 | 0.178 |
| PAC | 0.445 | 0.304 | 0.121 | 0.376 |
Leverage
| Company | Total Debt/Equity % (mrq) | Current Ratio (mrq) | Total Debt (mrq, USD Mil) | Operating Cash Flow TTM (USD Mil) | Free Cash Flow TTM (USD Mil) |
|---|---|---|---|---|---|
| SKYH | 336.869 | 3.044 | 555.880 | -1.200 | -153.500 |
| CAAP | 66.533 | 1.352 | 1,104.950 | 465.220 | 529.210 |
| OMAB | 107.212 | 1.121 | 13,579.170 | 7,257.040 | 2,777.920 |
| ASR | 71.523 | 3.393 | 35,352.400 | 12,652.870 | 3,374.900 |
| PAC | 226.335 | 1.469 | 63,830.430 | 21,345.020 | 1,832.580 |
Liquidity
| Company | Cash per Share | Current Ratio | Quick Ratio | Cash/Short-Term Debt | Payout Ratio % |
|---|---|---|---|---|---|
| SKYH | 0.351 | 6.998 | — | — | 0.000 |
| CAAP | 4.732 | 1.402 | 1.355 | 5.203 | 0.000 |
| OMAB | 87.093 | 1.121 | 0.960 | 1.096 | 0.842 |
| ASR | 498.528 | 3.393 | — | 22.805 | 1.524 |
| PAC | 446.532 | 1.495 | 1.429 | — | 0.849 |
Returns
| Company | Return on Equity (TTM) | Return on Assets (TTM) |
|---|---|---|
| SKYH | 0.047 | -0.027 |
| CAAP | 0.162 | 0.071 |
| OMAB | 0.434 | 0.184 |
| ASR | 0.178 | 0.116 |
| PAC | 0.376 | 0.121 |
Source: Yahoo Finance
Conclusion
Sky Harbour offers a differentiated infrastructure model with long-duration contracts and exposure to a structurally undersupplied niche. The problem is that the equity already reflects a successful scaling outcome, while the financial statements still show negative operating margin, negative free cash flow, and elevated leverage. Until the company demonstrates more consistent earnings conversion and reduced dependence on external capital, the risk/reward remains unfavorable.
Data sourced from Yahoo Finance. Not investment advice.
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