Meredith Corp.’s employee retirement plan gained $41 million in 2010, an 18.7 percent increase, according to a report filed June 29 with the Securities and Exchange Commission. The Des Moines-based publishing and broadcasting company had $264.6 million available for benefits as of Dec. 31, 2010.

Net investment income accounted for $31.6 million of the gain. Participants in the plan contributed $16.5 million, and Meredith contributed $13.2 million. The plan paid out $21.4 million in benefits.

The Meredith Savings and Investment Plan portfolio included $130 million invested with registered investment companies, $78.8 million in pooled separate accounts, $34.7 million in a common trust fund and $21.6 million in Meredith common stock.