DORM · CIK 868780
What Dorman Products, Inc. told the SEC could break it.
Dorman's disclosures squeeze it between concentrated customers and a concentrated, tariff-exposed supply chain. In 2025 two automotive retailers each topped 10% of net sales and together made up about 40%, with its four largest customers accounting for 78% of receivables — so losing or being underbought by a top customer would hit both revenue and collections. On the supply side, roughly 77% of its purchase volume comes from non-U.S. suppliers and about 38% from China, leaving it vulnerable to trade restrictions and to U.S. tariffs on steel, aluminum, copper, and certain vehicle parts that have already raised its costs and pressure margins if it can't pass them through.
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
- Two customers each >10% (combined ~40%) of net sales; top-4 = 78% of receivableshigh
Dorman's sales are concentrated among a small number of large automotive retailers/warehouse distributors: in 2025 two customers each represented more than 10% of net sales and together accounted for approximately 40% (39% in 2024; three customers were 44% in 2023), and its four largest customers represented 78% of net accounts receivable. The company expects this concentration to continue, so loss of, or reduced purchasing by, either top customer — or a credit problem at one of the four largest — would materially affect revenue and collections.
“In 2025, two customers each represented more than 10% of net sales and together accounted for approximately 40% of net sales. We anticipate that this concentration of sales among these customers may continue in the future.”
SEC filing →As of 2026
Geographic concentration
- Sourcing concentration: ~77% non-U.S., ~38% from Chinamedium
Dorman outsources most manufacturing and procures heavily offshore: in 2025 roughly 77% of its total purchase volume came from non-U.S. suppliers, with about 38% sourced from China. Beyond tariff cost exposure, this concentrates supply-continuity risk in China and other foreign sources — import quotas/bans, retaliatory trade measures, fund-transfer restrictions, political/military instability, transportation delays, and epidemics causing factory closures or embargoes could disrupt its parts supply. A diverse 400+ supplier network (no single supplier >10%) partly mitigates single-source risk but not country-level concentration.
“In 2025, approximately 77% of our total volume of purchases of products was sourced from non-U.S. suppliers, with approximately 38% sourced from China, making us vulnerable to tariff increases and trade restrictions.”
Regulatory & policy
- Realized U.S. tariffs on steel, aluminum, copper & certain vehicle parts raising costsmedium
Because Dorman sources the majority of its products abroad, U.S. trade policy directly raises its input costs. Recent U.S. tariffs on steel, aluminum, copper and certain vehicle parts have already raised its costs, and further tariffs or retaliatory measures from trading partners could increase prices, reduce demand and disrupt global trade. If it cannot pass these costs to customers or otherwise mitigate them — harder if competitors absorb increases or engage in transshipping — its margins suffer; tariff actions already contributed to inflationary cost pressure in 2025.
“Recent U.S. tariffs on steel, aluminum, copper, and certain vehicle parts have raised costs, and further tariffs or retaliatory measures from U.S. trading partners could further increase prices, reduce demand, and negatively impact global trade.”
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