What Luxfer Holdings plc told the SEC could break it.

Luxfer's margins depend on volatile commodity inputs: aluminum is a significant input for the Gas Cylinders Segment, representing approximately 25% of that segment's raw-material costs in 2025, and aluminum prices rose materially in 2022 and remained volatile and generally above pre-2021 averages through 2025, while carbon fiber pricing has stayed firm and the Elektron segment depends on magnesium, zircon sand and rare earth oxides/metals; rising or volatile prices for these materials, if not passed through, would compress its margins.

“Aluminum is a significant input for the Gas Cylinders Segment and represented approximately 25% of segment raw material costs in 2025. Aluminum prices increased materially during 2022 and remained volatile through 2023, 2024 and into 2025, with prices generally above pre-2021 historical averages.”

Luxfer has meaningful customer concentration in its Gas Cylinders Segment, where two customers each represented 15% of segment sales and the ten largest customers accounted for approximately 57% of segment sales (Elektron's top 10 were ~50%, and overall top 10 customers were ~38% of net sales); given the highly engineered, qualified nature of many products, lost customers are difficult to replace quickly, so the loss of a significant (undisclosed) customer or a customer payment default could materially affect its results, financial position and cash flows.

“Two customers both represented 15% each of our Gas Cylinders Segment sales. No other singular customer represented greater than 10% of Gas Cylinders Segment sales.”

Luxfer's globally sourced, multi-country operations are exposed to trade-policy volatility that has already affected operations: tariffs and other trade measures between the U.S. and China, as well as broader restrictions affecting certain metals, rare earth materials and industrial inputs, have increased its input costs and created supply-chain uncertainty in recent periods and required pricing actions; further tariff escalation, export controls or licensing requirements could continue to raise costs, disrupt supply and pressure demand.

“Trade policy volatility has already affected our operations. For example, tariffs and other trade measures between the U.S. and China, as well as broader restrictions affecting certain metals, rare earth materials and industrial inputs, have increased input costs and created supply chain uncertainty in recent periods.”

Luxfer's Elektron segment requires certain rare earth metals and oxides — typically sourced from China — to manufacture some magnesium alloys and zirconium catalysts (and China dominates global primary-magnesium production); the supply of these materials is subject to geopolitical, regulatory and trade risks including export controls, licensing requirements and other government restrictions, whose combined impact since the first half of 2025 has reduced availability and increased cost, so a supply interruption or further restrictions could limit production and raise input costs.

“our Elektron segment requires certain rare earth metals and oxides typically sourced from China for use in the manufacture of some magnesium alloys and in zirconium catalysts. The supply of these materials is subject to geopolitical, regulatory and trade risks, including export controls, licensing requirements and other government-imposed restrictions, the combined impact of which since the first half of 2025 has resulted in reduced availability and increased cost.”