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MATERIAL INFORMATION Ecopetrol informs that it signed an Inter - administrative share purchase agreement with the Colombian Ministry of Finance and Public Credit through which it acquires a 51.4 % stake in ISA Ecopetrol S.A. ( BVC : ECOPETROL ; NYSE : EC , the " Company " ) informs that on August 11 , 2021 , it signed the Inter - administrative Share Purchase Agreement ( " the Inter Administrative Agreement ” ) with the Colombian Ministry of Finance and Public Credit ( " MHCP " ) , through which the Company acquires 569,472,561 shares of Interconexión Eléctrica S.A. ESP ( “ ISA ” ) , equivalent to 51.4 % of its outstanding shares , which represents 100 % of the stake that MHCP has in ISA . The price agreed is COP $ 25,000 per share . From this day onwards , the necessary procedures will be carried out towards the closing of the transaction . ecapeTROL In order to give further details about the transaction , Ecopetrol will hold two conference calls , one in Spanish and the other one in English , on August 12 , 2021. Please find below the timing , dial - in and links to access to the conferences : English Conference Call 1:00 p.m. Colombia time 2:00 p.m. New York time To access to the webcast , you must provide your contact information ( name and company ) . The following connection links will be available : English : 2a05ab2 https://ecopetrol2.webex.com/ecopetrol2/j.php?MTID=mc119b1e678c2ba581cbb78300 Spanish : Spanish Conference Call 2:30 p.m. Colombia time 3:30 p.m. NY time 9d58131 https://ecopetrol2.webex.com/ecopetrol2/j.php?MTID=m617e07ad463f1866e3212d5f8 To participate in the Q & A session , please enter here ( in the upper right corner of the form you can select the language of your preference ) : https://forms.office.com/r/87Q0dc9wmc Please verify in advance the proper operation of the webcast in your browser . We recommend the usage of the latest versions of Internet Explorer , Google Chrome y Mozilla Firefox .