04:47 PM EDT, 03/26/2026 (MT Newswires) -- Spero Therapeutics ( SPRO ) reported Q4 earnings late Thursday of $0.53 per diluted share, swinging from a loss of $0.38 a year earlier.
Revenue in the three months ended Dec. 31 was $41.3 million, up from $15 million a year earlier.
Analysts' estimates on FactSet weren't available for comparison.
Shares were up more than 3% in after-hours trading.