Sky Harbour Earnings Call Signals Growth Amid Risks

Sky Harbour Group Corporation ((SKYH)) has held its Q4 earnings call. Read on for the main highlights of the call.

Sky Harbour Group’s latest earnings call struck a cautiously optimistic tone, highlighting record revenue growth, improving cash metrics, and a fortified balance sheet, even as management acknowledged persistent GAAP losses and execution risks. Investors heard a story of rapid expansion in hangar infrastructure, rising occupancy, and better financing terms that together suggest growing momentum despite timing and cost headwinds.

Record Revenue Growth and Cash-Flow Turnaround

Sky Harbour reported fiscal 2025 revenues of $27.5 million, up 87% year over year, marking the highest in its history as new and existing campuses ramped and the Camarillo acquisition kicked in. Sequential revenue gains tracked rising occupancy at newly opened sites, while the company delivered positive operating cash flow for the first time and pushed adjusted EBITDA to roughly negative $1 million in Q4.

Obligated Group Strength and Visibility into 2027

Within its wholly owned obligated group, revenues climbed 49% year over year, with fourth-quarter sales up 18% sequentially as key campuses matured. Management expects more modest growth in 2026 before larger step-ups in 2027, driven mainly by the second phase of Miami and the Addison project, underpinning a clearer earnings ramp as these assets stabilize.

Expanding Footprint and Development Pipeline

On the real estate side, Sky Harbour met its goal of ending 2025 with 23 airports under ground lease, covering about 4.16 million square feet of hangar-buildable land. Of this, 1.096 million square feet are operating and roughly 1.149 million are fully funded, with about 750,000 square feet under construction and slated to deliver through 2026 and 2027, including Miami phase two, Bradley, and Addison phase two.

Liquidity “Fortress” and New Financing Tools

The company underscored what it called a fortress of liquidity, after closing $150 million of tax-exempt subordinated bonds with a five-year term and a 6% fixed coupon. It also secured a separate $200 million tax-exempt drawdown facility with JP Morgan that remained undrawn at year-end, leaving Sky Harbour with $48 million of cash and Treasuries plus the new bond proceeds to fund near-term expansion.

Unit Economics and Leverage to Boost Returns

Management laid out target unit economics of about $40 per square foot in rent plus $5 in fuel margin, against $9 in operating expense, implying roughly $36 of NOI per square foot. By increasingly using subordinated debt instead of equity at the project level, they argued that returns on equity could exceed 60%, versus roughly 30% under previous leverage assumptions, while stressing a disciplined approach to balance-sheet risk.

Leasing Momentum and Pricing Power

Leasing trends remained supportive, with the company citing an average 22% rent increase when re-leasing mature contracts from the prior year’s rate to the first year of new agreements. New leases are being written with CPI escalators that include a 4% floor, which, combined with higher initial rents, is expected to underpin durable same-asset revenue growth over time.

Vertical Integration Driving Build-Cost Gains

To improve construction efficiency and expand its addressable market, Sky Harbour has invested in vertical integration, including its own steel manufacturing capabilities and the Ascend in-house construction arm. These moves, alongside design refinements, have already yielded lower build costs, with sell-side references around $250 per square foot, and management expects further cost compression as prototypes are replicated.

Rising Operating Expenses and SG&A Discipline

Despite the growth, operating expenses climbed to nearly $28 million for the year, reflecting more campuses and accrued ground-lease costs that are often noncash. Management reiterated a commitment to cap cash SG&A at no more than $20 million at peak but acknowledged that achieving better operating efficiency at the campus level remains a work in progress.

Profitability Still Negative and Cash-Flow Quality Mixed

While adjusted EBITDA improved for a third straight quarter and reached a breakeven run rate in December, GAAP profitability remains negative and Q4 adjusted EBITDA was still about negative $1 million. Moreover, the quarter’s positive operating cash flow depended heavily on a one-time $5.9 million upfront rent payment tied to a lease extension, raising questions about the near-term sustainability of positive cash generation.

Construction Delays and Legacy Cost Overruns

The company flagged timing uncertainty around several second-phase developments, with start or completion dates pushed to TBD for projects including APA, DVT, HIO, IAD, ORL, and POU, contributing to lighter Q4 construction spending. Earlier projects also suffered COVID-era cost inflation and design issues that required extra equity and lowered initial yields, with management planning to update returns once these first-vintage assets stabilize.

Leasing Capacity, Competition, and Refinancing Risk

Rapid growth in square footage has stretched Sky Harbour’s leasing team, prompting plans to add staff to support both lease-up and preleasing, which introduces near-term execution risk on occupancy and rent targets. Management also noted rising competitive chatter and the need to secure prime airport land, while the strategy’s reliance on refinancing subordinate bonds and the JP Morgan facility into long-term tax-exempt debt adds another layer of execution and timing risk.

Guidance and Outlook Focused on NOI and Returns

Looking ahead, formal 2026 guidance will come on the next call and will focus on NOI capture rather than just counting airports, reflecting a shift toward economic performance metrics. With liquidity comprising $48 million in cash and Treasuries, $150 million of recent bond proceeds, and the undrawn $200 million facility, management believes it can more than double its rentable footprint to over 2 million square feet, deliver key projects through 2028, and drive higher ROE via leverage and cost-control gains.

Sky Harbour’s earnings call painted a picture of a business that is scaling quickly with improved financing and healthy leasing fundamentals but still working through profitability, cost, and execution challenges. For investors, the key watch points will be lease-up velocity, construction discipline, and successful refinancing against a backdrop of robust demand for business-aviation hangar space.