Outbrain (NASDAQ: OB), one of the world's largest providers of "chumbox" ads, went public in July at $20 per share. Its top competitor Taboola (NASDAQ: TBLA), which went public by merging with a SPAC (special purpose acquisition company) in June, has also lost over a fifth of its value since its opening trade, after all. Outbrain had been in talks to merge with Taboola for several years, but the merger was called off in 2020 amid COVID-19-related challenges.