SAO PAULO, May 13 (Reuters) - Nu Holdings NU.N, the listed entity which runs Brazilian digital lender Nubank, posted on Tuesday a 37% increase in its adjusted net profit from a year earlier, slightly missing analysts' estimates.

Nubank reported a $606.5 million adjusted net profit for the quarter ended in March, while analysts in an LSEG poll had expected a $630.5 million profit.

The result, which was positively impacted by $47 million before taxes due to a revision of fiscal credits, also came in under a company-provided consensus of $614 million.

Chief Financial Officer Guilherme Lago told Reuters that the profit increase was mainly due to greater profitability in its main market Brazil, with a larger personal loan portfolio and greater earnings leverage.

Nubank, which also operates in younger markets Colombia and Mexico, said its total revenues came in at $3.2 billion, increasing 19% year-on-year.

Annualized non-adjusted return on equity for the Brazilian digital lender, which counts Warren Buffett's Berkshire Hathaway BRKa.N among its shareholders, stood at 27%, increasing 4 percentage points from a year earlier, but dropping two points from the last quarter of 2024.

The bank ended the quarter with a $24.1 billion credit portfolio, up 23% from a year earlier. Meanwhile, the default ratio for over 90 days reached 6.5%, rising from 6.3% in the same quarter last year, although declining from the 7% in the previous quarter.