 BOSTON--BUSINESS WIRE--Semrush Holdings, Inc. NYSE: SEMR Semrush, or the Company, a leading online visibility management SaaS platform, announced today an extension of the early lock-up expiration date pursuant to the terms of lock-up agreements entered into with the underwriters the lock-up agreements of Semrushs initial public offering IPO of Class A common stock until the close of trading one business day following the release of earnings for the second quarter of 2021. In 