Samsung SDS relied on intra-group transactions for more than 80 percent of last year's earnings, raising concerns over the firm's future growth prospects, according to industry officials Sunday. Data released by the Fair Trade Commission show the IT service unit of the Samsung conglomerate earned 4.2 trillion won ($3.2 billion) last year from transactions with other Samsung Group units, accounting for 81.5 percent of the company's entire annual revenue and up 3.3 percentage points compared to 2021.