TREX · CIK 1069878
What Trex Company, Inc. told the SEC could break it.
What Trex flagged clusters on two concentrations. On the demand side, just three customers made up about 73% of total net sales in 2025 (81% in 2024), so losing one could materially harm the business. On the cost side, its products lean on commodity inputs — reclaimed wood fiber and scrap polyethylene for decking, plus aluminum and steel for railing and fastening — and higher aluminum and steel costs together with tariffs pulled 2025 gross margin down from 43.6% to 39.2%. Tariffs themselves are under 5% of cost of sales, the bulk tied to that aluminum and steel, which Trex says it mitigates through supplier negotiations and pricing actions.
3 self-disclosed vulnerabilities, pulled from its own filings — each in the company’s words, with the source. This is the risk register almost nobody reads.
In its own words
What could break it.
Customer concentration
- three customers (~73% of net sales)high
Three unnamed customers accounted for ~73% of total net sales in 2025 (81% in 2024, 72% in 2023); the loss of one could materially harm the business.
“For the years ended December 31, 2025, 2024, and 2023, three customers of Trex represented approximately 73%, 81%, and 72%, respectively, of the Company's total net sales.”
SEC filing →As of 2026
Commodity & input dependence
- aluminum, steel, scrap polyethylene, reclaimed wood fibermedium
Higher raw material costs for aluminum and steel (plus tariffs) drove Trex's 2025 gross margin down from 43.6% to 39.2%; core decking inputs are reclaimed wood fiber and scrap polyethylene.
“The decrease was primarily the result of higher raw material costs on aluminum and steel, tariffs, changes to production process driven by refinements made to our Enhance ® decking product line, and inefficiencies associated with start-up costs at our Arkansas facility, partially offset by higher pricing.”
SEC filing →As of 2026
Regulatory & policy
- tariffs on aluminum and steel inputsmedium
Tariffs account for less than 5% of Trex's cost of sales, the majority tied to aluminum and steel purchased for railing and fastening products; Trex mitigates via supplier negotiations and pricing actions.
“Tariffs account for less than 5% of our cost of sales. The majority of the tariffs are related to purchases of aluminum and steel used in our railing and fastening products.”
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