Mumbai/Bengaluru, April 3 -- A stock price plunge and, in some cases, a cash crunch has prompted creditors to take control of shares pledged by promoters of at least 15 small-cap companies over the past six months.

Solar project consultant and contactor Gensol Engineering Ltd and payment solutions provider AGS Transact Technologies Ltd, two companies that recently defaulted on loans, are among the small-cap firms that reported invocation of pledged shares, according to Prime Database, a Mumbai-based markets data tracking firm.

Other such firms that saw promoter shares taken over by lenders include renewable energy producer Orient Green Power Co. Ltd., digital services assistance provider Vakrangee Ltd, ready-mix concrete provider NCL In...