QINGDAO, China — Qingdao Doublestar Group, the controlling shareholder in South Korea's Kumho Tire Co. Inc., suffered a 75% drop in fiscal 2018 net earnings on 6% lower sales, according to figures in the company's recently released annual report.

MILAN — Pirelli & C. S.p.A. posted higher sales and earnings for the quarter ended March 31, aided by an improved price/mix component and cost-reduction plans.

HYOGO, Japan — Toyo Tire Corp. reported lower sales and earnings for the quarter ended March 31 as the company's business in Japan and in world markets other than North America waned.

TOKYO — Despite reporting lower operating income in its first fiscal 2019 quarter, Yokohama Rubber Co. Ltd. has revised upward its full-year earnings forecast based on projected gains from the sale of undisclosed fixed assets.

TOKYO — Bridgestone Corp.'s first-quarter operating income dropped 22.8 percent on 1.3-percent lower sales on the negative effects of higher raw materials costs and an ongoing restructuring in Bridgestone's diversified products unit.

KERALA, India — Indian tire maker Apollo Tyres Ltd. posted double-digit increases in sales and operating profits for the fiscal year ended March 31.

HANOVER, Germany — Continental A.G.'s Rubber Group — buoyed by strong tire business results — reported slightly higher operating income for the quarter ended March 31 on 3.8% higher sales.

QUINCY, Ill. — Titan International Inc. reported double-digit declines in operating and net income for the quarter ended March 31 on 3.5-percent lower sales.

TRELLEBORG, Sweden — Despite record quarterly pre-tax operating income, Trelleborg A.B. management was not satisfied with the company's first-quarter results as the operating result slipped more than a full point.