The company released a statement to the NZX with a headline that the sale of 8.5 per cent of the stock was to increase share market liquidity.
"Advice from our advisers suggests this transaction will provide additional liquidity in the market for CBL shares which we believe will benefit all shareholders," said chairman John Wells.
The company has about 236 million shares on issue and at yesterday's closing price had a market capitalisation of $837m.
On March 1, CBL said it expected underlying operating profit to rise by between 18 per cent and 22 per cent in calendar 2017 on revenue growth of 12 per cent to 16 per cent.
Advice from our advisers suggests this transaction will provide additional liquidity in the market for CBL shares which we believe will benefit all shareholders.
CBL listed on the NZX in 2015, raising $90m to help fund the acquisition of Australia's largest surety bond insurer Assetinsure, selling shares at $1.45 apiece.
The company began life as Contractors Bonding Ltd in 1973, and derives the bulk of its revenue from international operations, meaning its bottom line is influenced by unrealised foreign exchange movements.