Private equity firm Hellman & Friedman has taken a 7.5% stake in software maker Splunk worth about $1.45bn, according to a regulatory filing on Friday.

Shares of Splunk, which has a market value of nearly $20bn, rose 1% in pre-market trading.

Splunk had received a takeover offer worth more than $20 billion from Cisco Systems Inc, The Wall Street Journal reported earlier this month.

Read more: Reuters