10-Q: Sky Harbour Reports Soaring Revenue Amid Expansion

Sky Harbour Group Corporation announced significant revenue growth in its Q2 2025 earnings, driven by new campus operations and increased occupancy, despite rising operating expenses and continued investment in its ambitious development pipeline.

Summary

• Total revenue for the six months ended June 30, 2025, increased by 102.2% to $12.18 million, up from $6.02 million in the prior year.
• Rental revenue grew by 82% to $9.685 million, and fuel revenue surged by 251% to $2.495 million for the six-month period.
• Net income attributable to Sky Harbour Group Corporation shareholders was $11.077 million for the six months ended June 30, 2025, a significant improvement from a net loss of $13.178 million in the same period last year, primarily due to a non-cash unrealized gain on warrants.
• Basic earnings per share (EPS) for the six months ended June 30, 2025, was $0.33, compared to a loss of $0.54 in the prior year.
• Operating loss increased to $14.352 million for the six months ended June 30, 2025, from $10.182 million in the prior year, reflecting higher operating expenses.
• Cash and restricted cash decreased significantly to $32.105 million as of June 30, 2025, from $122.304 million at June 30, 2024.
• Net cash used in operating activities increased to $5.994 million for the six months ended June 30, 2025, from $5.472 million in the prior year.
• The company acquired the Camarillo Airport (CMA) hangar campus in December 2024 and commenced operations at its DVT campus in Q2 2025, contributing to revenue growth.
• New ground leases were signed at Hillsboro Airport (HIO) for approximately 13 acres (35-year initial term with a 10-year option) and New York Stewart International Airport (SWF) for approximately 16 acres (30-year initial term with three 15-year options) in April 2025.
• A design defect in prototype hangar buildings for ADS Phase I, APA Phase I, and DVT Phase I required retrofitting, adding $26 million to $28 million in costs and 3 to 5 months of construction duration for each project.

Sentiment

Score: 4

Explanation: The company exhibits strong revenue growth and strategic expansion, securing new leases and integrating vertically. However, this growth is accompanied by significantly increased operating losses, substantial cash burn, and notable project delays and cost overruns due to design defects. The positive net income is misleading, driven by a non-cash warrant revaluation. The aggressive expansion plan requires significant future capital, posing liquidity and dilution risks. While the long-term vision is compelling, current operational execution and cash management present considerable challenges.

Positives

• Total revenue increased by 102.2% for the six months ended June 30, 2025, demonstrating strong top-line growth.
• Rental revenue grew by 82% and fuel revenue by 251% for the six-month period, indicating successful expansion and increased service utilization.
• Achieved net income of $5.230 million for the six months ended June 30, 2025, a substantial turnaround from a $17.036 million net loss in the prior year, largely due to a non-cash unrealized gain on warrants.
• Successfully acquired the CMA hangar campus and commenced operations at the DVT campus, expanding the operational footprint.
• Secured new long-term ground leases at HIO (13 acres, 35+10 years) and SWF (16 acres, 30+15 years), supporting future growth plans.
• Vertical integration through the acquisition of a metal building and hangar door manufacturer is expected to improve quality and reduce costs and lead times for future development projects.
• Maintained compliance with all debt covenants for its Series 2021 Bonds as of June 30, 2025.

Negatives

• Operating loss increased by $4.170 million to $14.352 million for the six months ended June 30, 2025, indicating rising operational costs outpacing revenue growth.
• Cash and restricted cash significantly decreased by $90.199 million from June 30, 2024, to June 30, 2025, highlighting substantial cash burn.
• Net cash used in operating activities increased to $5.994 million, reflecting higher cash outflows from core operations.
• Net cash used in investing activities shifted from a $54.535 million cash inflow in H1 2024 to a $54.803 million cash outflow in H1 2025, primarily due to decreased proceeds from investments and increased capital expenditures.
• A significant design defect in prototype hangar buildings for ADS Phase I, APA Phase I, and DVT Phase I resulted in additional costs of $26 million to $28 million and construction delays of 3 to 5 months per project.
• Employee compensation and benefits expenses increased by 22% to $8.533 million for the six months ended June 30, 2025, driven by headcount increases and equity compensation.
• Ground lease expenses increased by 86% to $6.472 million for the six months ended June 30, 2025, due to new ground leases.

Risks

• Future ability to obtain additional tenants for facilities and secure sufficient rental income to meet financial obligations.
• Increasing construction costs due to inflation and potential increases in borrowing costs.
• Limited operating history makes it difficult to predict future revenues and operating results.
• Challenges in implementing construction cost mitigation strategies effectively.
• Changes in applicable laws or regulations impacting business operations.
• Adverse effects from general macroeconomic conditions, including inflation, interest rate volatility, and changes in trade policies.
• Difficulty in negotiating new ground leases on favorable terms or facing increased competition for such leases.
• Incurring significant costs and diverting management attention for evaluating ground leases that may not be executed.
• Variability in construction costs (e.g., steel, concrete, labor) and the inability to increase lease rates to absorb these costs.
• Risk that cost mitigation strategies may not be successful, or projects may exceed budgets or experience further delays.
• Elevated interest rates impacting future borrowing costs and credit spreads for non-rated issuers.
• Dependence on the ability to raise additional equity and/or debt financing, which may not be available on favorable terms or at all, potentially leading to dilution for existing stockholders.
• Cash deposits potentially exceeding insurance limits.
• Non-compliance with ground lease covenants requiring construction within certain periods and minimum spending, which could lead to lease termination or payment of shortfalls (e.g., PWK, SWF leases).

Future Outlook

The company expects to continue investing in construction and business development, anticipating ongoing operating losses in the near future. It plans to expand to up to 20 airport campuses over several years, with each campus estimated to cost approximately $60 million, funded 65% to 75% by private activity bonds and the remainder by equity or equity-linked financing. The cumulative 20-airport site business plan is estimated to cost approximately $1.2 billion. The company intends to aggressively mitigate inflationary pressures, reduce construction costs, and pursue compressed development schedules, including through vertical integration and shared savings clauses in construction contracts. It also plans to access the bond market opportunistically and may use hedging strategies against rising interest rates.

Management Comments

• We believe our scalable, real estate-centric business model is uniquely positioned to capture this market opportunity and address the increased imbalance between the supply and demand for private jet storage.
• We expect to realize economies of scale in construction through a prototype hangar design replicated at our home basing hangar campuses across the United States.
• Unlike a service company, our revenues are mostly derived from long-term rental agreements, offering stability and forward visibility of revenues and cash flows.
• We believe that our estimates of construction costs and timelines are subject to variability based on various factors including, but not limited to, changes in anticipated site plans, hangar mix, hangar specifications, executed guaranteed maximum price construction contracts, and general market conditions.
• We expect that over time this vertical integration will enable us to deliver metal buildings to most of our development sites in shorter times as compared to the anticipated lead times associated with conventional metal building fabricators.
• We intend to continue to aggressively mitigate inflationary pressures, reduce construction costs to the greatest extent possible, and pursue compressed development schedules.

Industry Context

The U.S. business aviation fleet has seen significant growth, with a 61% increase in physical footprint between 2010 and 2023, and a 102% increase in larger private jets (over 24-foot tail height). This growth, coupled with new aircraft deliveries exceeding retirements and design changes (e.g., winglets inhibiting stacking), has created a severe shortage of suitable hangar space, particularly for larger jets. Sky Harbour Group Corporation aims to capitalize on this imbalance by developing a nationwide network of purpose-built home-basing hangar campuses, offering private and semi-private hangars with dedicated services. The company's strategy of long-term rental agreements provides revenue stability, differentiating it from traditional FBOs and enabling public bond market financing.

Comparison to Industry Standards

• The company's focus on 'home basing hangar campuses' for business aircraft addresses a specific niche in the general aviation market, distinct from traditional Fixed-Base Operators (FBOs) that often cater to transient aircraft and may have older infrastructure.
• The prototype hangar design and vertical integration (metal building and hangar door manufacturer acquisition) are strategies aimed at achieving 'economies of scale in construction' and 'schedule compression,' which are critical for efficiency in large-scale real estate development compared to fragmented, bespoke hangar construction.
• The company's long-term ground leases (e.g., 16 to 73 years) and reliance on 'long-term rental agreements' for revenue provide a more stable and predictable revenue stream compared to the variable income models of some FBOs that rely heavily on fuel sales and transient services.
• The use of 'private activity bonds' for financing is a specific capital efficiency strategy, potentially offering lower borrowing costs compared to conventional real estate financing, which may not be available to smaller, less established developers in the aviation sector.
• The reported 'occupancy at June 30, 2025' for operational facilities (e.g., SGR 100%, OPF Phase I 100%, BNA 88.9%) indicates strong demand for its specialized hangar space, suggesting performance in line with or exceeding market demand in key locations where 'hangar space is at a premium' and 'waiting lists can exceed several years'.

Management Changes

Legal Proceedings

• The company is not currently a party to any material legal proceedings.

Related Party Transactions

• Loan and Security Agreement: On December 6, 2024, the company entered into a revolving line of credit loan and security agreement with a company controlled by the former owner of the Camarillo Airport (CMA) acquired subsidiaries, who also serves as an independent contractor. The company loaned $1.1 million as of June 30, 2025.
• Echo Echo Agreement: The company has non-exclusive agreements with Echo Echo, LLC, a related party to the Founder and CEO, for the use of Beechcraft Baron G58 (since September 20, 2021) and Epic E1000GX (since September 19, 2024) aircraft. Expenses incurred were $176,000 for Q2 2025 and $325,000 for H1 2025.
• Consulting Services: The company recognized $9,000 of expense for consulting services to a company that employed the Chief Financial Officer until prior to July 1, 2021, for the three and six months ended June 30, 2025.
• Construction Services: An individual hired on June 1, 2025, as Head of Construction and President of Ascend Aviation Services, holds a financial interest in a General Contractor previously engaged by the company. The company incurred $2.3 million (Q2 2025) and $5.7 million (H1 2025) in construction costs with this General Contractor for the APA Phase I project, and $0.1 million for ADS Phase II architectural and engineering services.

Stakeholder Impact

• Shareholders: Experience dilution risk from potential future equity capital raises, but also benefit from significant revenue growth and strategic expansion. The non-cash gain on warrants positively impacted net income and EPS, but underlying operational losses increased.
• Employees: Increased headcount and compensation expenses reflect growth, but the company's ability to sustain this growth depends on successful project execution and financing.
• Customers (Tenants): Benefit from new hangar facilities and services, addressing high demand for private jet storage. However, potential increases in construction costs could eventually translate to higher rental rates.
• Creditors (Bondholders): The company is in compliance with all debt covenants for its Series 2021 Bonds, providing assurance regarding its ability to meet debt service obligations, though future debt issuances will depend on market conditions.
• Suppliers/Contractors: Benefit from ongoing construction projects, but the company's efforts to mitigate costs and pursue shared savings clauses may impact their margins. The vertical integration strategy could shift some business internally.

Next Steps

• Continue construction on ADS Phase II (projected completion Q3 2026), APA Phase I (projected completion Q3 2025), BDL Phase I (projected completion Q4 2026), OPF Phase II (projected completion Q2 2026), ORL Phase I (projected completion Q2 2027), and PWK Phase I (projected completion Q3 2027).
• Begin construction on DVT Phase II (projected start Q2 2026), HIO Phase I (projected start Q3 2026), IAD Phase I (projected start Q2 2026), POU Phase I (projected start Q2 2026), SLC (projected start Q1 2026), SWF (start TBD), and TTN (projected start Q2 2026).
• Evaluate the impact of ASU No. 2023-09 (Income Taxes) on disclosures for annual periods beginning after December 15, 2024.
• Evaluate the impact of ASU No. 2024-03 (Expense Disaggregation Disclosures) on consolidated financial statements and disclosures for annual reporting periods beginning after December 15, 2026.
• Continue to monitor and mitigate construction costs and pursue compressed development schedules.
• Access the bond market on an opportunistic basis for future site developments.
• Potentially utilize the At-the-Market (ATM) Facility for additional equity capital raises.

Key Dates

Recommendation

Sky Harbour Group Corporation demonstrates strong revenue growth and an aggressive expansion strategy to capitalize on high demand for business aviation hangars. The company is actively acquiring new ground leases and bringing new facilities online, which is positive for long-term growth. However, this growth comes at a significant cost, as evidenced by widening operating losses and substantial cash burn. The reported net income is largely due to a non-cash gain on warrants, masking underlying operational challenges. Project delays and cost overruns due to design defects highlight execution risks. While the market opportunity is compelling, the company's high capital requirements and reliance on future financing, coupled with increasing operational expenses, suggest a 'hold' recommendation. Investors should monitor the company's ability to control construction costs, improve operational efficiency, and secure additional financing without excessive dilution, as these factors will be critical for sustainable profitability and long-term value creation.

Keywords

Aviation infrastructure, Hangar development, Business aircraft, SEC filing, Quarterly report, Financial results, Real estate, Ground leases, Construction costs, Private activity bonds, Capital raise, Operating loss, Revenue growth, Risk factors, Corporate governance