IPG said it earned $326.2 million, or 84 cents a share, vs. $252.3 million, or 64 cents a share, a year earlier. On an adjusted basis, which included $17 million in costs related to its acquisition of Acxiom, the company earned 89 cents a share.
Analysts surveyed by Zacks Investment Research had expected earnings of 81 cents a share. Revenue for the quarter was $2.41 billion vs. $2.13 billion in the year-earlier quarter.
For the full year, IPG posted adjusted earnings of $1.86 a share vs. adjusted earnings of $1.40 a share a year ago. Full-year 2018 net revenue was $8.03 billion, compared to $7.47 billion in 2017.
IPG noted that for both the fourth quarter and full year 2018, total revenue included $181.7 million related to Acxiom, which the company acquired on Oct. 1, though the impact "will not be included in the calculation of organic revenue growth until the fourth quarter of 2019."
"Overall, 2018 was a very successful year, with outstanding financial results, coupled with a significant, future-facing acquisition," IPG CEO Michael Roth said in a statement.
Shares of Interpublic were up close to 5% at $22.70 Wednesday on the New York Stock Exchange.
IPG said it was increasing its quarterly dividend to 23.5 cents a share from 21 cents. The dividend is payable on March 15, to shareholders of record at the close of business on March 1.