The change primarily reflects inflationary increases in operating costs being approximately offset by higher pricing and variable-index surcharges, the benefit of a higher volume of shipments, and, for the year-to-date period, the favorable impact of an employee benefit change. Et Al has filed a 13D/A form with the SEC disclosing ownership of 3,127,113 shares of Ampco-Pittsburgh Corp (AP). Rutabaga Capital Management Llc/ma holds 1,144,269 shares representing 5.90% ownership of the company.