 SÃO PAULO--BUSINESS WIRE--Arco Platform Limited, or Arco or Company Nasdaq: ARCE, today reported financial and operating results for the second quarter ended June 30, 2021. Operating results for the 2Q21 still reflect the challenges imposed by the COVID-19 in the sector and the schools operations. Despite the revenue seasonality and the higher investments in product and sales force impacting our margins this quarter, we reaffirm our margin guidance for 2021. The sales cycle for the 2022 s 