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Marcia Tosta occupies the position of Head-Cyber & Information Security at Petróleo Brasileiro SA.

Anna Tosta is an Independent Director at Quarterhill, Inc. and a Director at Children's Aid Society of Ottawa, CHEO Foundation, Fasken Martineau DuMoulin LLP, McCarthy Tétrault LLP (Canada), and a Member of The Law Society of Upper Canada.
She previously worked as an Associate at Gowling WLG (Canada) LLP.
Ms. Tosta has a graduate degree from the University of Ottawa and an undergraduate degree from St. Michael's College School.

Ann Elizabeth Tosta currently works as a Trustee for St George's Lupset Ltd.

Francisco Tosta Valim Filho is currently the Chief Executive Officer at Corporación Novavisión S de RL de CV.
He also holds the position of Chief Executive Officer-Cable Segment at Grupo Televisa SAB.
In addition, he is the Director at International Meal Co. Alimentacao SA and an Independent Director at Bemobi Mobile Tech SA. Previously, Mr. Tosta Valim Filho served as the Chief Executive Officer at Tele Norte Leste Participações SA from 2011 to 2012.
He also held the position of Chief Executive Officer at Tele Norte Celular Participações SA. From 2003 to 2008, he was the Chief Executive Officer at Net Serviços de Comunicação SA. Additionally, he served as the Chief Executive Officer at Oi SA from 2011 to 2013 and at Telemar Norte Leste SA from 2011 to 2012.
He was the Chief Executive Officer at Grupo Casas Bahia SA from 2013 to 2014.
Furthermore, he held the position of CEO-Latin America, Europe & Middle East Region at Experian Holdings Ltd.
in 2011.
He also served as the President-Brazil Operations at NII Holdings, Inc. and as the President at Claro Nxt Telecomunicacoes SA from 2015 to 2017.
From 2014 to 2018, he was an Independent Director at Atento SA. Mr. Tosta Valim Filho's education includes an undergraduate degree from Universidade Federal do Rio Grande do Sul and an MBA from USC Marshall School of Business.

Mr. Thomás Tosta de Sá is on the Board of Directors at Mangels Industrial SA. He received his undergraduate degree from Pontifícia Universidade Católica do Rio de Janeiro and an MBA from New York University.