POSCO Holdings Inc. announced Resumption of Production. Areas of Production Resumed: Three blast furnaces, two FINEX plants and some of steelmaking and continuous casting facilities in Pohang Steelworks. Details of Resumed Production: Started production of semi-finished steel(slab) as three blast furnaces, two FINEX plants and some steelmaking and continuous casting facilities are returned to normal operation 5 out of 7 revolving furnaces resumed operation 8 out of 6 continuous casting facilities resumed operation.

Reasons for Resumption: It is to resume part of production lines that has been temporarily suspended due to Typhoon Hinnamnor that flooded the facilities in Pohang Steelworks. ?Effects of Resumption: Resume production of semi-finished steel(slab) as blasting furnaces, FINEX plants, and some of steelmaking and continuous casting facilities are returned to normal operation. Date of Resumption: September13, 2022.

Title and date of other disclosure related to this one: ‘Suspension of Production' disclosed on September 7, 2022.