UnitedHealth Group Inc.'s surging business services unit, Optum, has been drawing accolades for bringing stability to the erratic federal health insurance exchange.
After years of investments in technology and capital, the division also is making measurable contributions to UnitedHealth's bottom line.
The Minnetonka-based company said Thursday that earnings rose 15 percent in the fourth quarter, driven by substantial gains from Optum as well as increases in its insurance rolls.
Results exceeded analysts' expectations, with profits rising to $1.43 billion, or $1.41 a share, from $1.24 billion, or $1.20 a share, a year ago.
Health reform efforts are squeezing profits from all national insurers, but Optum serves as a "strong growth engine" for UnitedHealth, said Leerink Research analyst Ana Gupte.
"That saved the day," Gupte said. "Optum's the reason they're doing relatively OK. It could be a lot worse."
CEO Stephen Hemsley said the company's diversity of products and services drove "exceptional growth" during the quarter. Revenue climbed to $31.1 billion from $28.8 billion in last year's final quarter.
Analysts expected earnings of $1.40 a share on revenue of $31 billion.