09:18 AM EDT, 10/28/2026 (MT Newswires) -- National Gypsum Co. (SASE:2090) expects its annual production costs to rise 1% following revisions to electricity, water, and wastewater tariffs in Saudi Arabia, according to a Wednesday filing. The revised tariffs will take effect on Jan. 1, 2027, with the financial impact expected to be reflected in the gypsum board and drywall products supplier's results starting from the first quarter of 2027.

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