Talos Energy (TALO) reported Q3 adjusted net loss late Monday of $0.14 per diluted share, compared with adjusted net income of $0.15 a year earlier.
Analysts polled by Capital IQ expected a loss of $0.06.
Revenue for the quarter ended Sept. 30 rose to $509.3 million from $383.1 million a year earlier.
Analysts surveyed by Capital IQ expected $502.2 million.
Shares of Talos Energy were down 1.5% in after-hours trading.