Lonsum bergerak di bidang pemuliaan tanaman, penanaman, pemanenan, pengolahan dan penjualan produk kelapa sawit, karet, kakao, teh dan kopi; termasuk penjualan benih tanaman kelapa sawit dan kakao. Dewasa ini Lonsum mengelola 38 perkebunan baik inti maupun plasma, memiliki karyawan handal yang berpengalaman, yang mempunyai keahlian di bidang budidaya tanaman, serta memiliki teknologi riset dan penelitian yang mutakhir.

Lonsum is in the business of breeding, planting, harvesting, milling, processing and selling of palm products, rubber, cocoa, tea and coffee; including the oil palm and cocoa seeds for these crops. Lonsum manages 38 plantations comprising both nucleus and plasma estates, relying on highly experienced field personnel, agro-management expertise and advanced R&D technology.