Updated
The most significant concentration Willis Lease Finance Corporatio discloses is Leasing and Related Operations segment at 94.9%, classified HIGH by disclosed size. Below: the full set from the latest 10-K — verbatim quotes, filing references, and a synthesis of what these exposures mean together.
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Source: Willis Lease Finance Corporatio’s SEC Form 10-K filed — view the filing on SEC EDGAR ↗
Each card carries a disclosed-size chip (HIGH / MEDIUM / LOW — how large the exposure is as a share of revenue, not how dangerous it is) and a nature tag: Built-in(the company’s own model, geography, or products) or Outside party (an external customer, supplier, or distributor it relies on).
“10-K Item 1: 'Total revenues from our Leasing and Related Operations reportable segment was 94.9% and 95.4% of the respective total consolidated revenue for the years ended December 31, 2025 and 2024, respectively.'”
“10-K Item 1: 'approximately 64.8% of our on-lease engines, aircraft, and related equipment (all of which we sometimes refer to as "equipment") by net book value are leased and operated internationally'”
Willis Lease Finance's concentration profile is defined by two large, structural exposures rather than customer- or supplier-specific dependencies. Nearly all of the company's business runs through a single segment: the Leasing and Related Operations segment generated 94.9% of total consolidated revenue, essentially the entirety of the company's operations, with no meaningful diversification into other business lines. Geographically, a majority of the company's equipment base — approximately 64.8% of on-lease engines, aircraft, and related equipment by net book value — is leased and operated internationally, meaning results are tied to global aviation demand, cross-border regulatory conditions, and international counterparty performance rather than a primarily domestic customer base. Both exposures are disclosed at the high end of the size band and are structural rather than idiosyncratic — they describe what the business fundamentally is (an aircraft-engine leasing company with a global footprint) rather than a dependency on any single customer or supplier that could be renegotiated or replaced. Because both concentrations are structural, they are unlikely to shift quickly, and the practical risk is more about broad aviation-cycle or geopolitical conditions than a single counterparty failure.
For the engine’s reasoning on WLFC’s current verdict — including which dimensions drove the score — see the per-dimension breakdown.
| Symbol | Name | HIGH | MEDIUM | LOW | Total |
|---|---|---|---|---|---|
| WLFC● | Willis Lease Finance Corporatio | 2 | 0 | 0 | 2 |
| CAR | Avis Budget Group, Inc. | 1 | 1 | 0 | 2 |
| GATX | GATX Corporation | 0 | 3 | 1 | 4 |
| CTOS | Custom Truck One Source, Inc. | 0 | 0 | 0 | 0 |
| EQPT | EquipmentShare.com Inc | 0 | 0 | 0 | 0 |
| HRI | Herc Holdings Inc. | 0 | 0 | 0 | 0 |
Concentration counts reflect items disclosed in each peer’s most recent 10-K; disclosed-size classification uses TrendMatrix’s internal 10-K extraction taxonomy.