He is one of the main stakeholders of Square Group, a Bangladeshi business conglomerate engaged in pharmaceuticals, textiles, toiletries & cosmetics, food & beverage, security services, information technology, healthcare, aviation, banking and television broadcasting.

He is recognized by the Government of Bangladesh as a Commercially Important Person (CIP) for his continuous contribution to the economic development of the country in different years since 2005 and acclaimed as one of the highest taxpayer since 2008.

[6] He was one of approximately 13,000 trained as commando at the Chakrata, Dehradun cantonment in India during the Bangladesh liberation war.

[5] Anjan Chowdhury is a Trustee Member of the Education, Science, Technology and Cultural Development Trust (ESTCDT) of Independent University, Bangladesh.

[7] He is the Chairman of Society for the Promotion of Bangladesh Art (SPBA) and President of Annoda Gobinda Public Library, Pabna.

He served as vice president previously and councilor of Bangladesh Cricket Board, and director of Abahani Limited Dhaka.

He was a member of the Pabna District Sports Association's executive committee and still conducts their events as a consultant.

[24] He is one of the founders of the Dishari Computer Training Institute that engages the poor and meritorious students in the development of skills.