Engineering giant AECOM has finalised a deal to buy URS.
Aecom is to acquire all outstanding shares in URS with a combination of cash and stock valued at around $4 billion, or $56.31Â per share.
With the assumption of URS debt, the total value of the deal will be closer to $6 billion.
The new combined business will have more than 95,000 employees in a 150 countries.
Michael Burke, Aecom president and chief executive officer, said: “This combination creates an industry leader with the ability to deliver more capabilities from a broad global platform to reach more clients in more industry end markets.”