Turkcell names Metin Tuğtağ chief sales officer

"whether the registrant files or will file annual reports under cover of Form 20-F" Form 20-F is the standardized annual disclosure that non-U.S. companies must file with the U.S. securities regulator when their shares are traded in the U.S.; it contains audited financial statements, a plain-language description of the business, management discussion, governance details and key risk factors. It matters to investors because it provides a consistent, comparable company 'report card' and rulebook, helping buyers assess financial health, governance and risks before investing.