Civil engineer John Laing plans to raise £95.3 million through a rights issue.
Laing, which runs Chiltern Railways and builds schools, hospitals and roads, said it would issue 13 new ordinary shares in the group for every 51 existing ordinary shares at a price of 200p per share.
Laing Roads owns a 50 per cent stake of the M40 between junctions 1a and 15. Chiltern Railways is a wholly owned subsidiary of John Laing plc, operating between Marrowbone in London and the West Midlands.
And a spokesman said Laing's accomodation division was fulfilling a £16 million contract for the design, build, finance and operation of 128 bed mental health facility for North Birmingham Mental Health Trust until 2036.
The rights issue will support the expansion of its bidding and investment activities in Public Private Partnership (PPP) and Private Finance Initiative (PFI) projects in the UK and overseas.
Under a rights issue, a company invites existing shareholders to buy extra shares in the group at a price usually lower than it would be in the open market, allowing it to raise capital.
The group will ask shareholders to approve the issue at a special meeting later this month. Laing has reshaped itself after offloading Laing Homes and its troubled construction arm in 2002, following two straight years of losses.
In March, the group said annual profits rose 18 per cent to £25.1 million.
Laing added it was well placed to benefit from opportunities in the growing primary and secondary PPP and PFI markets in the UK and abroad.
The group said the issue would allow it to bid for and invest in projects faster than it may otherwise have been able to do.
It believed further opportunities were particularly concentrated in health and education accommodation projects, in UK transport, in road projects abroad and in overseas infrastructure in general.