SIER, or Surabaya Industrial Estate Rungkut, is a leading industrial estate provider located in Surabaya, Indonesia. With a commitment to fostering industrial growth, SIER offers a diverse range of products and services, including industrial land, ready-to-use factory buildings, and conventional warehouse solutions. Their offerings cater to small and medium enterprises through the Small Industrial Business Unit (SUIK), ensuring a supportive environment for businesses of all sizes.

SIER also provides essential utility services such as clean water processing and waste management, as well as logistical support and warehouse management systems. Additionally, they facilitate a variety of projects in partnership with tenants to enhance operational efficiencies. SIER is recognized for its dedication to risk management, having received accolades such as the ASEAN Risk Awards. With a focus on innovation and sustainability, including virtual reality experiences to showcase properties, SIER is well-positioned to meet the evolving needs of industries in the region, making it a key player in the Southeast Asian industrial landscape.