Preliminary results of a survey of nearby solar-type spectroscopic binaries (SB) with orbital periods 1 < P-1 < 30 days for tertiary companions are presented. Observations with adaptive optics and data from the 2MASS sky survey permitted to discover new tertiary components and to sharpen statistical limits on their frequency. We find that 0.86 +/- 0.07 SBs with P-1 < 5 d have tertiaries, but this fraction drops to 0.49 +/- 0.06 for P-1 > 5 d. The periods of tertiary companions are distributed in a wide range, from 2 to 10(5) yr, with most frequent periods of few thousand years.