Cevian said in June it had built up a 4.95% stake in the insurer, which has sold off several businesses in the past year. Cevian said it wanted to see Aviva return five billion pounds ($6.86 billion) of excess capital to shareholders.
Cevian's shareholding reached 5.02% on Aug 20, the filing showed.
($1 = 0.7290 pounds)
(Reporting by Carolyn Cohn; Editing by Rachel Armstrong)