In its first results since its insurance unit CEO was fatally shot in New York City, UnitedHealth Group reported Thursday weaker-than-expected fourth-quarter revenue, prompting its shares to fall in early morning trading despite quarterly profit beating projections.

UnitedHealth posted a better-than-expected fourth-quarter profit, but a nagging rise in medical costs and care utilization surprised Wall Street.

UnitedHealth Group Inc. reported fourth-quarter profit that surpassed Wall Street’s expectations in its first financial statement since a top executive was killed in New York last month.