Promoters of at least 55 companies have bought shares of their companies from the open market since January 1 in the wake of stock price declines in the past two months. UPL, HCL Tech, Aarti Pharmalabs, Bajaj Holdings, Quess Corp, Eris Lifesciences, Jindal Saw, Welspun Corp, Sobha, and Zensar Tech are some of the companies that saw promoter purchases in this period, according to deal data on stock exchanges.