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The present study examines the publication pattern of Chennai Mathematical Institute (CMI) during 2005 - 2019 using Web of Science (WOS) database from Clarivate Analytics. 632 articles were published during the study period, more number of articles published in 2019 with 94 (14.87%) and highest number of papers published in physical review letters journal which havs more h-index (567), average annual growth rate of CMI publications was 18.48. Researchers are interested with joint authorship rather than solo authorship pattern. Arun K G is the most prolific author with 94 records and USA is the top collaborative country for CMI with 164(25.95%) records.