Perimeter Group Inc.

Except as set forth below, we are not aware of any material changes to the Company’s risk factors disclosed in Part I, Item 1A. “Risk Factors” of the Company’s 2025 Annual Report.

Risks Related to Our Business and Industry

Disruptions in the supply of P₂S₅ for our North American customers have adversely affected, and are expected to continue to adversely affect, the results of our Specialty Products segment.

Our P₂S₅ customers in North America have historically been served primarily by a third-party tolling facility in Sauget, Illinois. Supply from the facility has not been consistent with our customers’ requirements, and we are actively working to obtain permanent supply alternatives. We are currently supplying customers from multiple alternative sources at a higher cost, and we expect the associated costs to impact the operating results of our P₂S₅ business in the near term. Net sales of our P₂S₅ business declined in the three months ended September 30, 2026 compared to the prior-year period.

We cannot assure you that we will secure reliable long-term sources of supply on acceptable terms, if at all, or that our costs of supply will return to historical levels. A prolonged disruption, a loss of customers or the inability to obtain alternative sources of supply may prolong the adverse effect on the results of our Specialty Products segment and on our business, financial condition and results of operations.