Watsco — Key Risks

Heavy Dependence on Two Suppliers Creates Serious Vulnerability

Carrier and Rheem together account for 70% of all purchases (62% and 8% respectively), and the top ten suppliers combined represent 85%. If either relationship were disrupted — whether from a manufacturing problem, a contract dispute, or a supplier decision to sell direct — the company could find itself unable to fill customer orders quickly. The company's distribution agreements with Carrier, Rheem, and Mitsubishi have no stated expiration date, which sounds stable but also means they can potentially be ended without a fixed notice period.

Tariff Exposure on Mexico- and China-Sourced Products Could Squeeze Margins

A large share of HVAC equipment sold by the company is manufactured or assembled in Mexico and China. If tariffs — like those proposed by the Trump administration — raise the cost of those goods, the company must either absorb the hit to profit margins or pass costs on to customers, risking lost sales. For a distributor that competes heavily on price, this is a meaningful squeeze.

Refrigerant Transition Adds Product and Regulatory Uncertainty

New environmental rules require HVAC manufacturers to shift to refrigerants with a lower global warming potential (GWP). If suppliers struggle to produce compliant systems at competitive prices, or if customers are slow to adopt the new products, the company's ability to sell current inventory and move seamlessly to new product lines could be disrupted.

Dual-Class Share Structure Concentrates Control in One Family

The Nahmad family — CEO Albert Nahmad, President Aaron Nahmad (his son), and Director Valerie Schimel (his daughter) — collectively controls approximately 54% of combined voting power through Class B shares that carry ten votes per share versus one vote for common shares. Directors and officers together hold 56% of total voting power. Regular shareholders have limited ability to influence board composition or major corporate decisions.

Acquisition Strategy Brings Real Integration and Liability Risk

Growth through acquisitions is central to the company's strategy, and deals can introduce hidden liabilities, integration failures, key employee departures, and shareholder dilution (new shares issued as deal currency). The company acknowledges that seller indemnifications may not fully cover undiscovered problems from acquired businesses.

Seasonal Sales Patterns Create Quarterly Revenue Swings

Air conditioning demand peaks in the second and third quarters; heating peaks in the first and fourth. A mild summer or warm winter can meaningfully reduce revenue in those periods, making annual results partly dependent on weather patterns outside management's control.

Goodwill Represents a Third of Total Assets and Could Be Written Down

At December 31, 2025, goodwill, intangibles, and long-lived assets made up roughly 33% of total assets. If economic conditions worsen or acquired businesses underperform, the company may be required to take impairment charges (non-cash write-downs that reduce reported earnings), which can be material and unpredictable.