Here are a few things you need to know as Saudi stocks start trading on Monday. 1) Saudi Arabia Public Transport Co. (SAPTCO) will launch operations of Riyadh public transport network in the second quarter of 2021. 2) Saudi Arabian Amiantit Co. received letters from the General Authority of Zakat and Tax (GAZT) requiring it to amend Zakat declarations submitted from 2015 to 2018. 3) Hail Cement Co. paid the entire loan amount of SR152 million ($40.53 million) to Saudi Industrial Development Fund (SIDF). 4) The Mediterranean and Gulf Insurance and Reinsurance Co. (MEDGULF) applied for the approval of the Capital Market Authority (CMA) on the capital decrease.