What Belden, Inc. told the SEC could break it.

Copper is a key input for Belden's cable and connectivity products; it uses copper pass-through pricing and at year-end 2025 was committed to buy ~1.7 million pounds of copper at a $9.0M fixed cost, so copper-price swings affect pricing, working capital and margins.

“At December 31, 2025, we were committed to purchase approximately 1.7 million pounds of copper at an aggregate fixed cost of $ 9.0 million.”

Belden's largest customer (a distributor) was ~14% of revenue in 2025 ($392.1M) and its ten largest customers — eight of them distributors — were ~47% of revenue; since customers aren't contractually obligated to buy, loss of a major distributor would materially hit sales.

“Revenues generated in both the Smart Infrastructure Solutions and Automation Solutions segments from our largest customer were approximately $ 392.1 million ( 14 % of revenues), $ 348.1 million ( 14 % of revenues), and $ 378.1 million ( 15 % of revenues) for the years ended December 31, 2025, 2024, and 2023, respectively.”

With cross-border supply chains and manufacturing in Canada, China, India, Mexico, Tunisia and Europe (and reliance on Chinese suppliers), Belden is exposed to the 2025 surge in U.S. tariffs on imports from nearly every country and to USMCA disruption, which raise supply-chain costs and pressure margins or prices.

“Throughout 2025, the United States government issued orders increasing tariffs on imports from nearly every country in the world on certain products. In some cases, this has led to negotiations of new trade deals and in others, it has resulted in reciprocal tariffs on U.S. exports. Because not all goods can be sourced in all countries, global companies like Belden will experience increased costs in their supply chains that may lead to reduced margins or increased prices.”