Sky Harbour Group Corp: Form 10-Q for the period ended Mar 31, 2025

The following analysis of our financial condition and results of operations should be read in conjunction with the consolidated financial statements and the notes included elsewhere in this Quarterly Report on Form 10-Q (this “Form 10-Q”), as well as the information contained in our Annual Report on Form 10-K for the year ended December 31, 2024, filed with the Securities Exchange Commission (the “SEC”) on March 27, 2025 (the “Form 10-K”), which is accessible on the SEC’s website at www.sec.gov (http://www.sec.gov).

Cautionary Note Regarding Forward-Looking Statements

This Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These forward-looking statements can be identified by the use of forward-looking terminology, including the words “believes,” “estimates,” “anticipates,” “expects,” “intends,” “plans,” “may,” “might,” “will,” “potential,” “projects,” “predicts,” “continue,” or “should,” or, in each case, their negative or other variations or comparable terminology. There can be no assurance that actual results will not materially differ from expectations. These statements are based on management’s current expectations, but actual results may differ materially due to various factors, including, but not limited to:

• expectations regarding the Company’s strategies and future financial performance, including the Company’s future business plans or objectives, prospective performance and commercial opportunities and competitors, services, pricing, marketing plans, operating expenses, market trends, revenues, liquidity, cash flows and uses of cash, capital expenditures, and the Company’s ability to invest in growth initiatives;
• the effects of general economic conditions, including inflation, rising interest rates, and availability of construction materials and labor for our development projects;
• our limited operating history makes it difficult to predict future revenues and operating results;
• our ability to implement our construction costs mitigation strategies;
• changes in applicable laws or regulations;
• the possibility that the Company may be adversely affected by other economic, business, and/or competitive factors; and
• our financial performance.

The forward-looking statements contained in this Form 10-Q are based on our current expectations and beliefs concerning future developments and their potential effects on us. Future developments affecting us may not be those that we have anticipated. These forward-looking statements involve a number of risks, uncertainties (some of which are beyond our control) and other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements. These risks and uncertainties include, but are not limited to, those factors described under the heading “Risk Factors” in the Form 10-K. Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws. These risks and others described in the Form 10-K may not be exhaustive.

By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that may or may not occur in the future. We caution you that forward-looking statements are not guarantees of future performance and that our actual results of operations, financial condition and liquidity, and developments in the industry in which we operate may differ materially from those made in or suggested by the forward-looking statements contained in this prospectus. In addition, even if our results or operations, financial condition and liquidity, and developments in the industry in which we operate are consistent with the forward-looking statements contained in this prospectus, those results or developments may not be indicative of results or developments in subsequent periods.

Overview and Background

We are an aviation infrastructure development company building the first nationwide network of home basing hangar campuses for business aircraft. We develop, lease and manage general aviation hangars across the United States, targeting airfields in markets with significant based aircraft populations and high hangar demand. Our home basing hangar campuses feature private and semi-private hangars and a full suite of dedicated services specifically optimized for home based, versus transient, aircraft.

The physical footprint of the U.S. business aviation fleet grew by almost 36 million square feet in the past fourteen years, with hangar supply lagging dramatically, especially in key growth markets. As the fleet of private jets in the United States continues to grow, with recent new aircraft deliveries exceeding retirements, demand for hangar space is at a premium in part because new jets require taller tail clearances and more square footage of hangar space and the pace of new hangar construction has lagged behind the demand. The cumulative square footage of the business aircraft fleet in the United States increased 61% between 2010 and 2023. Moreover, over that same period, there was an 102% increase in the square footage of larger private jets – those with greater than a 24-foot tail height. A recent study conducted by a business aircraft manufacturer forecasted that business aircraft will only continue to grow in the next ten years, with up to 8,500 new business jet deliveries worth over $285 billion expected to be delivered between 2025 and 2034, with over two-thirds of the deliveries expected to be comprised of larger private jets. This forecast is further supported by data from the major business aviation manufacturers that suggest the current order backlog for new business aviation aircraft as of December 31, 2024 is over $52 billion, an increase of approximately 6% over the prior year.

These larger footprint aircraft do not fit in much of the existing hangar infrastructure and impose stacking challenges and constraints in the traditional shared or community hangars operated by fixed-base operators (“FBO”). The addition of winglets (the vertical extensions on aircraft wingtips) on most modern business jets inhibits wing-over-wing storage. Aircraft hangars are in high demand and short supply, with some airports compiling waiting lists that can exceed several years.

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 intend to capitalize on the existing hangar supply constraints at major U.S. airports by targeting high-end tenants in markets where there is a shortage of private and FBO hangar space, or where such hangars are or are becoming obsolete.

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. This allows for centralized procurement, straightforward permitting processes, efficient development processes, and the best hangar in business aviation. Unlike a service company, our revenues are mostly derived from long-term rental agreements, offering stability and forward visibility of revenues and cash flows. This allows the Company to fund its development through the public bond market, providing capital efficiency and mitigating refinance risk.

We seek to develop our home basing hangar campuses on long-term ground leases (or sub-leases thereof) at airports with suitable infrastructure serving metropolitan centers across the United States. We lease each of our properties under long-term ground leases.

The table below presents certain information with respect to our portfolio of ground leases as of March 31, 2025.

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The following tables provide supplemental information regarding each of our home basing hangar campus properties in operation and in development:

PROPERTIES IN OPERATION

PROPERTIES IN DEVELOPMENT

(1) Our projections associated with the commencement and completion of construction, estimated total construction cost, hangars, and rentable square footage of our properties in development are inherently subjective and require judgement to estimate. 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.

Recent Developments

In March 2025, we entered into a rental agreement at King County International Airport (Boeing Field) with King County, Washington (the “BFI Lease”). The BFI Lease includes an approximately 92,495 square foot hangar complex and its initial term expires in February 2026. We intend to pursue the execution of a longer-term lease with King County during the initial term of the BFI Lease.

In April 2025, we entered into the HIO Lease at HIO with the Port of Portland. The HIO Lease covers approximately 13 acres of property at HIO. The initial term of the HIO Lease will be 35 years from the later of certificate of occupancy or 18 months from the expiration of the diligence period, as defined in the HIO Lease, with lease payments commencing contemporaneously with the term. The HIO Lease contains an option exercisable by the Company to extend the HIO Lease for an additional 10 years following the expiration of the initial term.

In April 2025, we entered into the SWF Lease at SWF with the Port Authority of New York and New Jersey. The SWF Lease covers approximately 16 acres of property at SWF. The initial term of the SWF Lease will be 30 years, with lease payments commencing on the earlier of hangar occupancy or 36 months from the receipt of certain environmental approvals. The SWF Lease contains three options exercisable by the Company to extend the SWF Lease for an additional total of 15 years following the expiration of the initial term.

Factors That May Influence Future Results of Operations

Airfield and Tenant Portfolio Growth

Our future success depends upon our ability to attract and retain tenants for hangars at our home basing hangar campuses. The extent to which we achieve growth in our customer base materially influences our business and results of operations. Any number of factors could affect our ability to grow our customer base, including tenant preferences for hangar space and related services, including size and location of the hangar, as well as general economic conditions. The level and volatility of fuel prices may also impact the general aviation industry and our ability to attract and retain tenants. In addition, our ability to attract and retain customers may be dependent on other factors outside of our control, including the future trend of private aircraft sizes and the availability of alternative hangars, including size, location and/or services provided. Any significant decline in our customer base, or in our rate of growth, could have a material adverse effect on our business and results of operations, which could, in turn, result in a decline in the trading price of our securities.

Our ability to expand through new ground leases at airports is also integral to our long-term business strategy and requires that we identify and consummate suitable new ground leases or investment opportunities in real estate properties for our portfolio that meet our investment criteria and are compatible with our growth strategy. Our ability to enter into new ground leases on favorable terms, or at all, may be adversely affected by certain significant factors. We may not be able to negotiate new ground leases with airport authorities on attractive terms or at all, and we may encounter competition from other potential ground lessors, which could significantly increase the lease rate for properties we seek to lease. In our efforts to secure new ground leases, we may incur significant costs and divert management attention in connection with evaluating and negotiating such ground leases, including ground leases that we are subsequently unable to execute. In addition, even if we enter into letters of intent or conditional agreements for new ground leases of airport properties, these agreements are subject to customary closing conditions, including, but not limited to, the satisfactory results of our due diligence investigations and local government and municipal authority approvals.

Construction Material Costs and Labor

When constructing our home basing hangar campuses, we use various materials, assemblies, and labor components. We contract for our materials and labor with various general contractors under guaranteed maximum price (GMP) contracts upon receipt of building permits. This allows us to mitigate certain inflationary pressures associated with increases in certain building materials and labor costs between the time construction begins at a hangar campus and the time it is completed. Typically, the materials and most of the components used to construct our hangar campuses are readily available in the United States, and we attempt to procure such materials from domestic sources where and when possible. We monitor the supply markets and ensure robust competition to achieve the best prices available. Typically, the price changes that most significantly influence our development operations are price increases in steel, concrete, and labor. In February 2025, the President of the United States issued an executive order reimposing tariffs on steel imports from all sources, ending country and product exemptions, and broadening the application of the tariffs to fabricated steel products. This order became effective on March 12, 2025. There can be no assurance as to when or if these or other import tariffs, quotas or other duties may be enacted, enforced, extended, modified or terminated in the future, or the extent of the impact of such tariffs will have on the cost of our construction materials. We believe that it is possible that market conditions, including recent and proposed changes in trade policies, may lead to continued increases in construction costs and market rental rates for hangars within our development projects. However, there can be no assurance that we will be able to increase the lease rates for the hangars within our hangar campuses to absorb these increased costs, if at all.

In May 2023, we acquired a controlling interest in a metal building and hangar door manufacturer, that we expect will ultimately result in an increase in quality and a reduction in the overall cost of the metal building and hangar door components at future development projects. 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 believe internal building fabrication will provide us opportunities to aggressively target continued schedule compression at most of our development projects in the future. In December 2023, we engaged several structural engineering firms to perform an independent peer review of the hangar buildings designed for our DVT Phase I and APA Phase I development projects. The independent peer reviews determined a significant design defect existed within our prototype hangar building designs that required retrofitting to both meet and exceed our standards and the respective local building codes. The anticipated retrofitting efforts were also applied to ADS Phase I, and we believe the aggregate additional cost of such retrofits totaled between $26 to $28 million. Such retrofitting efforts required an additional three to five months of construction duration for each project impacted. Given the design enhancements implemented at our APA Phase I, DVT Phase I, and ADS Phase I development projects, our total construction costs for these projects were each greater than our original estimates, and outside of the scope of the original guaranteed maximum price construction contracts. In March 2024, we funded the increase in estimated costs by contributing $27 million of our corporate cash holdings to SHC, thereby restricting the use of such cash to the project scope of the Series 2021 Bonds.

Our projections associated with the commencement and completion of construction, estimated total construction cost, hangars, and rentable square footage of our properties in development are inherently subjective and require judgement to estimate. 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. During 2024, we updated many of our preliminary estimates based on our intention to begin incorporating a larger hangar prototype into our home basing hangar campuses, which is intended to provide an increase in rentable square footage of hangar, office, and lounge space upon completion. This larger hangar prototype requires an increase in construction materials and components, and we expect its incorporation into multiple future development projects will ultimately result in cost savings through the realization of economies of scale. Our updated estimates of total construction costs do not include projections of potential cost reductions due to such efficiencies, and we continue to reevaluate our preliminary and updated estimates from time to time over the course of the development lifecycle. We intend to continue to aggressively mitigate inflationary pressures, reduce construction costs to the greatest extent possible, and pursue compressed development schedules. We currently structure our guaranteed maximum price construction contracts with shared savings clauses to incentivize the general contractors to reduce construction costs. No assurance can be given that our cost mitigation strategies will be successful, the costs of our ongoing and future projects will not exceed budgets or the guaranteed maximum price for such projects, or that the completion will not be delayed beyond the projected completion dates.

Increases in Market Interest Rates and Future Costs of Borrowing

Economic conditions and actions by policymaking bodies contributed to rising interest rates, which, along with increases in our borrowing levels, could increase our future borrowing costs. While the Federal Reserve reduced interest rates in September, November, and December 2024 and has indicated the potential for further rate cuts, interest rates remain relatively high and there can be no certainty with respect to the occurrence, timing, or magnitude of further interest rate cuts by the Federal Reserve, and thus no certainty with respect to the ultimate impact on our borrowing costs. We expect to issue additional debt to finance future site developments and elevated interest rates would impact our overall economic performance. In addition, we are subject to credit spreads demanded by fixed income investors. As a non-rated issuer, increases in general of credit spreads in the market, or for us, may result in a higher cost of borrowing in the future. We intend to access the bond market on an opportunistic basis. In addition, we may hedge against rising benchmark interest rates by entering into hedging strategies with high quality counterparties.

Current Capital Requirements and Future Expenditures for Expansion

We previously funded SHC with over $200 million to fund the two phases at our initial five ground leased airport locations. We maintain the ability to include up to $50 million in new projects outside the original five locations to be funded with a portion of the existing proceeds held by the trustee as long as certain approvals and supplemental consultant reports are provided showing that such new project would result in better coverage of debt service than previously contemplated projects. We exercised this ability utilizing approximately $26 million of the $50 million available and received the requisite approvals and reports in March 2023 with respect to our ADS Phase I development project.

We previously raised equity capital, along with potential future debt and further equity issuances, including the 2024 Purchase Agreement and 2023 Purchase Agreement (as defined herein) entered into on September 16, 2024 and November 1, 2023, respectively, see Liquidity and Capital Resources — Private Placement and Securities Purchase Agreement below, to begin to fund additional airport campuses and reach up to 20 airport campuses over the next several years. We also have the ability to access the capital markets through our ATM Facility and through our effective shelf registration statement on Form S-3. On average, each future campus is anticipated to be composed of 200,000 rentable square feet and is expected to cost approximately $60 million per campus, with 65% to 75% or more to be funded with additional private activity bonds or other indebtedness. All future hangar campus projects are discretionary and require us to identify the appropriate airports with the target hangar demand economics, secure required ground leases and permits, and complete future construction at such sites.

The cumulative 20 airport site business plan is estimated to cost approximately $1.2 billion, with approximately 65% to 75% anticipated from private activity bonds and the balance with equity or equity-linked financing. Our ability to raise additional equity and/or debt financing will be subject to a number of risks, including our ability to obtain financing upon reasonable terms, if at all, costs of construction, delays in constructing new facilities, operating results, and other risk factors. In the event that we are unable to obtain additional financing, we may be required to raise additional equity capital, creating additional dilution to existing stockholders. There can be no assurance that we would be successful in raising such additional equity capital on favorable terms, if at all. Even if we can obtain such additional equity financing if needed, there can be no assurance that we would be successful in raising such additional financing on favorable terms, if at all.

Key Business Metrics

We focus on a variety of indicators and key operating and financial metrics to monitor the financial condition and performance of the continuing operations of our business. These metrics include:

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Critical Accounting Policies and Estimates

The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and expenses during the periods reported. Actual results could materially differ from those estimates. We have identified the following as our critical accounting policies:

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Such estimates include assumptions used within impairment analyses, estimated useful lives of depreciable assets and amortizable costs, estimates of inputs utilized in determining the fair value of financial instruments such as warrants, estimates and assumptions related to right-of-use assets and operating lease liabilities, and estimates and assumptions used in the determination of the fair value of assets acquired and liabilities assumed in the business combination. Actual results could differ materially from those estimates.

Cost of Construction

Cost of construction on the consolidated balance sheets is carried at cost. The cost of acquiring an asset includes the costs necessary to bring a capital project to the condition necessary for its intended use. Costs are capitalized once the construction of a specific capital project is probable. Construction labor and other direct costs of construction are capitalized. Professional fees for engineering, procurement, consulting, and other soft costs that are directly identifiable with the project and are considered an incremental direct cost are capitalized. We allocate a portion of our internal salaries to both capitalized cost of construction and to general and administrative expense based on the percentage of time certain employees worked in the related areas. Interest costs on the loans and bonds used to fund the capital projects are also capitalized until the capital project is completed. Once a capital project is complete, the cost of the capital project is reclassified to Constructed Assets on the accompanying balance sheet and we begin to depreciate the constructed asset on a straight-line basis over the lesser of the life of the asset or the remaining term of the related ground lease, including expected renewal terms.

Leases

We account for leases under Accounting Standards Codification (“ASC”) Topic 842, Leases. We determine whether a contract contains a lease at the inception of the contract. ASC Topic 842 requires lessees to recognize operating lease liabilities and right-of-use (“ROU”) assets for all leases with terms of more than 12 months on the consolidated balance sheets. We have made an accounting policy election that will keep leases with an initial term of 12 months or less off our consolidated balance sheets and will result in recognizing those lease payments in the consolidated statements of operations on a straight-line basis over the lease term. When management determines that it is reasonably certain that we will exercise our options to renew the leases, the renewal terms are included in the lease term and the resulting ROU asset and operating lease liability balances. We have elected to not capitalize any interest cost that is implicit within our operating leases into cost of construction on the consolidated balance sheet, but instead, we expense our ground lease cost in the consolidated statements of operations.

We have lease agreements with lease and non-lease components; we have elected the accounting policy to not separate lease and non-lease components for all underlying asset classes.

Revenue Recognition

We lease hangar facilities that we construct to third parties. The lease agreements are either on a month-to-month basis or have a defined term and may have options to extend the term. Some of the leases contain options to terminate the lease by either party with given notice. There are no options given to the lessee to purchase the underlying assets. Rental revenue is recognized in accordance with ASC Topic 842, Leases, and includes (i) fixed payments of cash rents, which represents revenue each tenant pays in accordance with the terms of its respective lease and is recognized on a straight-line basis over the term of the lease and (ii) variable payments of tenant reimbursements, which are recoveries of all or a portion of the common area maintenance and operating expenses of the property and are recognized in the same period as the expenses are incurred.

The Company evaluates the collectability of tenant receivables for payments required under the lease agreements. If the Company determines that collectability is not probable, the Company recognizes any difference between revenue amounts recognized to date under ASC 842 and payments that have been collected from the lessee, including any additional rent or lease termination fees, as a current period adjustment to rental revenue.

Recent Accounting Pronouncements

See Note 2 — Basis of Presentation and Significant Accounting Policies in the Notes to Consolidated Financial Statements for a full description of recent accounting pronouncements including the expected dates of adoption and effects on results of operations and financial condition.

Results of Operations

Three Months Ended March 31, 2025 Compared to the Three Months Ended March 31, 2024

The following table sets forth a summary of our consolidated results of operations for the periods indicated below and the changes between the periods (in thousands).

Revenues

Rental revenues for the three months ended March 31, 2025 were approximately $4.4 million, compared to approximately $2.1 million for the three months ended March 31, 2024. The $2.3 million, or 109%, increase was primarily the result of operations at CMA, which was acquired during the three months ended December 31, 2024, the commencement of operations at SJC during the three months ended June 30, 2024, and the cumulative impact of increased occupancy at our BNA and OPF hangar campuses.

Fuel revenues for the three months ended March 31, 2025 were approximately $1.1 million, compared to approximately $0.3 million for the three months ended March 31, 2024. The approximately $0.8 million, or 326%, increase was primarily the result of fuel sales at our CMA hangar campus, where our fuel revenues and related expenses are recognized on a gross basis.

Operating Expenses

Campus operating expenses increased approximately $1.1 million, or 142%, from approximately $0.8 million for the three months ended March 31, 2024, to approximately $1.9 million for the three months ended March 31, 2025. Salaries, wages, and benefits associated with our hangar campus personnel increased approximately $0.6 million, primarily driven by headcount increases in anticipation of the commencement of operations at our DVT, APA, and ADS hangar campuses, the acquisition of a hangar campus at CMA during December 2024, and the commencement of operations at our SJC hangar campus in April 2024. Other campus operating expenses increased approximately $0.5 million, primarily driven by increased insurance, property taxes, and utilities associated with operations at CMA and SJC, where our operations commenced in December 2024 and April 2024, respectively.

Fuel expenses for the three months ended March 31, 2025 were approximately $0.7 million, compared to approximately $0.1 million for the three months ended March 31, 2024. The approximately $0.6 million, or 906%, increase was primarily the result of the CMA Transaction during the three months ended December 31, 2024, and the related impact of recognizing certain fuel revenue and expenses on a gross basis.

Ground lease expenses increased approximately $1.7 million, or 136%, from approximately $1.2 million for the three months ended March 31, 2024, to approximately $2.9 million for the three months ended March 31, 2025. The increase in ground lease expense was driven primarily by expense recognized associated with the ground and hangar lease signed at SJC during the three months ended March 31, 2024. The increase in ground lease expense was also driven by the ground leases signed at ORL during the three months ended March 31, 2024, IAD during the three months ended June 30, 2024, SLC during the three months ended September 30, 2024, and the ground leases assumed as part of the CMA Transaction during the three months ended December 31, 2024.

Depreciation and amortization increased approximately $0.5 million, or 75%, for the three months ended March 31, 2025, as compared to the three months ended March 31, 2024. The increase was primarily driven by our acquisition of a hangar campus at CMA during the three months ended December 31, 2024 .

Operating Expenses - Continued

Pursuit and marketing expenses for the three months ended March 31, 2025 were approximately $0.6 million, compared to approximately $0.4 million for the three months ended March 31, 2024. The approximately $0.2 million, or 64%, increase was primarily the result of investment in our growth strategy in securing airport site acquisitions and potential tenants throughout the year.

Employee compensation and benefits expenses increased approximately $0.7 million, or 18%, to $4.2 million for the three months ended March 31, 2025, as compared to approximately $3.6 million for the three months ended March 31, 2024. The increase was primarily driven by an increase in corporate headcount and expense recognized associated with our equity compensation programs. Headcount and compensation expenses increased approximately $0.5 million, and non-cash equity compensation expense increased approximately $0.2 million.

For the three months ended March 31, 2025 and 2024, other general and administrative expenses were approximately $1.1 million and approximately $1.0 million, respectively. The approximately $0.1 million increase was primarily driven by slight increases in professional fees and technology costs due to the expansion of the business and headcount, offset by a slight decrease in corporate insurance premiums.

Other (Income) Expense

Other expense decreased from approximately $16.0 million of expense for the three months ended March 31, 2024, to approximately $2.3 million of expense for the three months ended March 31, 2025. This decrease was primarily due to an approximately $13.7 million difference in the mark-to-market adjustment of the outstanding warrants at March 31, 2025 as compared to March 31, 2024.

Non-GAAP Financial Measures

To supplement our results presented in accordance with GAAP, we utilize Adjusted EBITDA, a non-GAAP financial measure that excludes or adjusts certain items. We define Adjusted EBITDA as net income before (i) depreciation and amortization expense, (ii) interest expense, (iii) other income, predominantly consisting of interest income and realized gains from sales of available-for-sale securities, (iv) non-cash equity-based compensation expense, (v) non-cash gains and losses resulting from the change in fair value of our liability-classified warrants, (vi) non-cash operating lease expense, (vii) non-cash operating lease income, (viii) provision for income taxes, (ix) other non-cash expenses, including, but not limited to, the impairment of long-lived assets, gains or losses arising from the disposition of assets, losses on extinguishment of debt, and other non-cash non-operating expenses.

Management uses Adjusted EBITDA to facilitate operating performance comparisons from period to period. We believe this non-GAAP financial measure provide investors, analysts and other interested parties useful information to evaluate our business performance as the removal of certain non-cash expenses and income, they facilitate company-to-company operating performance comparisons. While we believe this non-GAAP financial measure is useful in evaluating our business, it should be considered as supplemental in nature and is not meant to be considered in isolation or as a substitute for the related financial information prepared in accordance with GAAP. In addition, this non-GAAP financial measures may not be the same as a similarly entitled measure reported by other companies, limiting their usefulness as comparative measures. See below for a reconciliation of net income (loss) to Adjusted EBITDA, as well as “Key Business Metrics” for further discussion of Adjusted EBITDA.

Adjusted EBITDA

A reconciliation of net income (loss) to Adjusted EBITDA is presented below:

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Liquidity and Capital Resources

Overview

Liquidity is a measure of our ability to meet potential cash requirements, including ongoing commitments to repay borrowings, fund the construction of new assets, fund working capital and other general business needs. Our primary sources of cash include the potential issuance of equity and debt securities and rental payments from tenants. Our long-term liquidity requirements include lease payments under our ground leases with airport authorities, repaying principal and interest on outstanding borrowings, funding the construction costs of our hangar campus development projects (see “— Construction Material Costs and Labor”), funding for operations, and paying accrued expenses.

We believe that we have access to multiple sources of capital to fund our long-term liquidity requirements, including the incurrence of additional private activity bonds and other debt and the issuance of additional equity securities. We also have the ability to utilize our ATM Facility or otherwise utilize our shelf registration statement on Form S-3 to access the capital markets. However, as we have recently become a publicly-traded company, we cannot assure you that we will have access to these sources of capital or that, even if such sources of capital are available, that these sources of capital will be available on favorable terms. Our ability to incur additional debt will depend on multiple factors, including our degree of leverage, the value of our unencumbered assets and borrowing restrictions that are or may be imposed by future lenders. Our ability to access the equity and debt capital markets will depend on multiple factors as well, including general market conditions for real estate companies, our degree of leverage, the trading price of our common stock and debt and market perceptions about our Company.

Our cash deposits may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and the majority are maintained with a major financial institution with reputable credit. Our restricted cash is held in trust at a major financial institution pursuant to the Series 2021 Bonds indenture. We monitor the relative credit standing of financial institutions with whom we transact and limit the amount of credit exposure with any one entity. Our portfolio of investments and restricted investments is composed entirely of U.S. Treasury securities as of March 31, 2025.

The following table summarizes our cash and cash equivalents, restricted cash, investments, and restricted investments as of March 31, 2025 and December 31, 2024 (in thousands):

2024 Private Placement and Securities Purchase Agreement

On September 16, 2024, we entered into a Securities Purchase Agreement (the “2024 Purchase Agreement”) with certain investors (collectively, the “Initial 2024 Investors”) relating to, among other things, the issuance and sale to the Initial 2024 Investors at an initial closing an aggregate of 3,352,106 shares (the “Initial 2024 PIPE Shares”) of our Class A Common Stock for an aggregate purchase price of $31.8 million (the “Initial 2024 Closing” . On October 25, 2024, additional investors (the “Additional 2024 Investors”) each executed a joinder to the 2024 Purchase Agreement, pursuant to which the Additional 2024 Investors agreed to purchase, and we agreed to sell, an aggregate of 603,684 shares (the “Additional 2024 PIPE Shares”, and together with the Initial 2024 PIPE Shares, the “First Closing 2024 PIPE Shares”) for an aggregate purchase price of $5.7 million. The Initial 2024 Closing under the 2024 Purchase Agreement occurred on October 25, 2024, and 3,955,790 First Closing 2024 PIPE Shares were issued to the Investors for an aggregate purchase price of $37.6 million. In December 2024, we sold and issued to the 2024 Investors an aggregate of 3,955,790 shares (the “Second Closing 2024 PIPE Shares”) for an aggregate purchase price of approximately $37.6 million (the “Second 2024 Closing”). Inclusive of the Initial 2024 Closing, we issued and sold an aggregate of 7,911,580 shares of Class A Common Stock for an aggregate purchase price of approximately $75.2 million.

2023 Private Placement and Securities Purchase Agreement

On November 1, 2023, we entered into a Securities Purchase Agreement (the “2023 Purchase Agreement”) with certain investors (collectively, the “2023 Investors”), pursuant to which we sold and issued to the 2023 Investors at an initial closing an aggregate of 6,586,154 shares of our Class A Common Stock (the “Initial 2023 PIPE Shares”) and accompanying warrants to purchase up to 1,141,600 shares of Class A Common Stock (the “Initial PIPE Warrants”), for an aggregate purchase price of $42.8 million (the "Initial 2023 Financing"). On November 29, 2023, pursuant to the terms of the 2023 Purchase Agreement, we sold and issued to the 2023 Investors an aggregate of 2,307,692 shares of our Class A Common Stock (the “2023 Additional PIPE Shares” and, together with the 2023 Initial PIPE Shares, the “2023 PIPE Shares”) and accompanying warrants to purchase an aggregate of 400,000 shares of Class A Common Stock (the “Additional PIPE Warrants” and, together with the Initial PIPE Warrants, the “PIPE Warrants”) for an aggregate purchase price of $15.0 million. The aggregate PIPE financing through the 2023 Purchase Agreement totaled approximately $57.8 million.

At-the-Market Facility

On March 27, 2024, we entered into an At Market Issuance Sales Agreement (the “ATM Agreement”) with B. Riley Securities, Inc. (“B. Riley”) with respect to an “at the market” offering program (the “ATM Facility”), under which we may, from time to time, at our sole discretion, issue and sell through B. Riley, acting as sales agent, up to $100 million of shares of Class A Common Stock. Pursuant to the ATM Agreement, we may sell the shares through B. Riley by any method permitted that is deemed an “at the market” offering as defined in Rule 415 under the Securities Act. B. Riley will use commercially reasonable efforts consistent with its normal trading and sales practices to sell the shares from time to time, based upon instructions from us, including any price or size limits or other customary parameters or conditions we may impose. We will pay B. Riley a commission of 3.0% of the gross sales price per share sold under the ATM Agreement, subject to certain reductions. During the three months ended March 31, 2025, we sold no shares of Class A Common Stock under the ATM Facility. During the twelve months ended December 31, 2024, we sold 79,676 shares of Class A Common Stock under the ATM Facility at a weighted-average sales price of $13.75. As a result, we have approximately $98.9 million in remaining capacity under our ATM Facility.

We are not obligated to sell any shares under the ATM Agreement. The offering of shares pursuant to the ATM Agreement will terminate upon the earlier to occur of (i) the issuance and sale, through B. Riley, of all of the shares subject to the ATM Agreement and (ii) termination of the ATM Agreement in accordance with its terms. We have made limited sales under the ATM Facility to date and will only do so when our stock price is at prices our board of directors deems appropriate.

Private Activity Bonds

On September 14, 2021, SHC completed an issuance through the Public Finance Authority (Wisconsin) of $166.3 million of Senior Special Facility Revenue Bonds (Aviation Facilities Project), Series 2021 (the “PABs”). The PABs are comprised of three maturities: $21.1 million bearing interest at 4.00%, due July 1, 2036; $30.4 million bearing interest at 4.00%, due July 1, 2041; and $114.8 million bearing interest at 4.25%, due July 1, 2054. The Series 2021 Bond that has a maturity date of July 1, 2036 was issued at a premium, and Sky received bond proceeds that were $0.2 million above its face value. The net proceeds from the issuance of the PABs proceeds are being used to (a) finance or refinance the construction of various aviation facilities consisting of general aviation aircraft hangars and storage facilities located and to be located on the SGR site, the OPF site, the BNA site, the APA site, and the DVT site; (b) fund debt service and other operating expenses such as ground lease expense during the initial construction period; (c) fund deposits to the Debt Service Reserve Fund; and (d) pay certain costs of issuance related to the PABs.

Debt Covenants

The PABs contain financial and non-financial covenants, including a debt service coverage ratio, a restricted payments test and limitations on the sale, lease, or distribution of assets. To the extent that SHC does not comply with these covenants, an event of default or cross-default may occur under one or more agreements, and we or our subsidiaries may be restricted in our ability to pay dividends, issue new debt or access our leased facilities. The PABs are collateralized on a joint and several basis with the property and revenues of all SHC subsidiaries and their assets financed or to be financed from the proceeds of the PABs.

Covenants in the PABs require SHC to maintain a debt service coverage ratio (as defined in the relevant documents) of at least 1.25 for each applicable test period, commencing with the quarter ending December 31, 2024. The PABs are subject to a Continuing Disclosure Agreement whereby SHC is obligated to provide electronic copies of (i) monthly construction reports, (ii) quarterly reports containing quarterly financial information of SHC and (iii) annual reports containing audited consolidated financial statements of SHC to the Municipal Securities Rulemaking Board. As of March 31, 2025, we were in compliance with all debt covenants.

Lease Commitments

The Company’s future minimum lease payments required under leases as of March 31, 2025 were as follows:

Off-Balance Sheet Arrangements

We do not maintain any off-balance sheet arrangements.

Cash Flows

The following table summarizes our sources and uses of cash for the three months ended March 31, 2025 and 2024 (in thousands):

Operating Activities

Cash provided by operating activities is significantly influenced by the amount of cash we invest in personnel and infrastructure to support the anticipated growth of our business. Our working capital consists primarily of cash, receivables from tenants, prepaid expenses, accounts payable, accrued compensation, accrued other expenses, and lease liabilities. The timing of collection of our tenant receivables, and the timing of spending commitments and payments of our accounts payable, accrued expenses, accrued payroll and related benefits, all affect these account balances.

Net cash used in operating activities was approximately $5.0 million for the three months ended March 31, 2025, as compared to cash used in operating activities of approximately $4.4 million for the same period in 2024. The $0.6 million increase in cash used in operating activities was primarily attributable to an approximately $0.5 million increase in net loss, net of non-cash adjustments and an approximately $0.1 million unfavorable change in working capital. The increase in net loss, net of non-cash adjustments was primarily driven by the impact of increases in headcount at both the corporate and hangar campus level, including start-up expenses incurred in anticipation of commencing operations at DVT, APA, and ADS. The unfavorable change in working capital was primarily driven by the timing of spending commitments and payments of our accounts payable and other accrued expenses.

Investing Activities

Our primary investing activities have consisted of payments related to the cost of construction at our various hangar campus development projects and investment in U.S. Treasury Securities. As our business expands, we expect to continue to invest in our current and anticipated future portfolio of hangar campus development projects.

Net cash used in investing activities was approximately $4.5 million for the three months ended March 31, 2025, as compared to cash provided by investing activities of approximately $33.9 million for the same period in 2024. The decrease of approximately $38.4 million of cash provided by investing activities was driven primarily by a decrease in proceeds received from held-to-maturity investments of approximately $68.0 million and an increase of capital expenditures of approximately $14.3 million for the three months ended March 31, 2025 as compared to the three months ended March 31, 2024. These impacts were offset by an approximately $44.8 million decrease in purchases of available for sale investments.

Financing Activities

Our primary financing activities have consisted of capital raised to fund the growth of our business and proceeds from debt obligations incurred to finance our hangar campus development projects. We expect to raise additional equity capital and issue additional indebtedness as our business grows.

Net cash used in financing activities was approximately $1.2 million for the three months ended March 31, 2025, as compared to net cash provided by financing activities of approximately $0.3 million for the same period in 2024. The approximately $1.5 million increase in net cash used in financing activities was primarily driven by a decrease of $1.5 million in proceeds received from the exercise of Warrants during the three months ended March 31, 2024.

The Company is a smaller reporting company as defined by Rule 12b-2 of the Exchange Act and is not required to provide the information under this item.

Evaluation of Disclosure Controls and Procedures

Disclosure controls and procedures are controls and other procedures that are designed to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed in company reports filed or submitted under the Exchange Act is accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosure.

In connection with the preparation of this Form 10-Q, as required by Rules 13a-15 and 15d-15 under the Exchange Act, our Chief Executive Officer and Chief Financial Officer carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of March 31, 2025. Based on that evaluation, our CEO and CFO concluded that our disclosure controls and procedures are effective to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms, and is accumulated and communicated to our management, including our CEO and CFO, to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting during the three months ended March 31, 2025 that have materially affected, or are reasonably likely to materially affect, our internal controls over financial reporting.

There have been no material changes in our risk factors from those disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024.