JHX · CIK 1159152
What James Hardie Industries plc told the SEC could break it.
James Hardie's disclosures cluster on the materials and suppliers behind its building products. It depends on commodity raw materials — cellulose fiber, silica, cement and petrochemical resins like polyethylene and PVC — where a 10% cost change would have moved fiscal 2026 cost of sales by about $57.9 million, and more acutely it relies on a single supplier for the critical capped compounds in its decking and railing products with no second source in place. On the demand side, one customer was about 11% of net sales (down from 15% the prior year), and it flags trade-policy risk — tariffs, quotas and other restrictions — that could pressure margins and its customer and vendor relationships.
4 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.
Sole-source dependency
- capped compounds for decking & railing (single supplier, no second source)high
James Hardie relies on a single supplier for certain critical capped compounds used in its decking and railing products and has no redundant or second-source arrangement, risking operational disruption if the supplier fails.
“However, we do rely on a single supplier for certain critical capped compounds used in our decking and railing products. We do not currently have arrangements in place for a redundant or second-source supply for those compounds.”
SEC filing →As of 2026
Commodity & input dependence
- cellulose fiber, silica, cement, petrochemical resins (PE/PVC), gypsummedium
Products depend on raw materials including cellulose fiber (wood pulp), silica, cement, and petrochemical resins (polyethylene, PVC); a +/-10% change in core commodity costs would have moved FY2026 cost of sales by ~$57.9M (1.9%).
“Our products are made from a variety of raw materials, principally cellulose fiber (wood-based pulp), silica, cement, water, various petrochemical resins, including polyethylene, PVC resins, recycled polyethylene and PVC material, waste paper and gypsum.”
SEC filing →As of 2026
Customer concentration
- largest customer (~11% of net sales)medium
One unnamed customer (Customer A, from the Siding & Trim and Deck, Rail & Accessories segments) contributed >10% of net sales in each of the last three years — ~11.3% ($546.4M) in FY2026, down from 15.1% in FY2025.
“Our largest customer accounted for approximately 11% of our net sales for the year ended March 31, 2026.”
SEC filing →As of 2026
Regulatory & policy
- trade policy / tariffs / trade restrictionsmedium
Changes in trade policies — tariffs, quotas, embargoes, sanctions, customs restrictions — by the US or other governments could require changes to operations and adversely affect margins and customer/vendor relationships.
“Changes in trade policies and regulations, including trade restrictions, tariffs or quotas, embargoes, sanctions and countersanctions, safeguards or customs restrictions, by the United States government or other countries' governments, could require changes to our conduct of business, adversely affect our margins and our relationships with customers, vendors and associates and otherwise adversely affect our business, financial condition and results of operations.”
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