(Reuters) - General Electric Co GE.N announced a $11.1 billion deal on Monday to merge its transportation business with U.S. rail equipment manufacturer Wabtec Corp WAB.N, with GE and its shareholders owning just over half of the combined business.

The deal, first reported by Reuters on Sunday, is the biggest to be inked thus far by GE Chief Executive John Flannery since he announced a major overhaul of the U.S. industrial conglomerate late last year.

The transaction values the GE transportation business, which makes train engines, at $11.1 billion. GE will receive a $2.9 billion up-front payment in cash and a 9.9-percent stake in the combined company, with GE shareholders awarded 40.2 percent and existing Wabtec shareholders owning 49.9 percent.

GE shares rose 2.8 percent to $15.39. Wabtec shares rose 4.3 percent to $99.28.

The deal is tax-free for GE and Wabtec shareholders because it is structured as a so-called Reverse Morris Trust, with GE spinning off the transportation unit and simultaneously merging it with Wabtec.

The $11.1 billion deal value includes a $1.1 billion net tax benefit accruing to the combined company, GE and Wabtec said.

The equity value of the company combining Wabtec and GE’s transportation business will be more than $20 billion.

FILE PHOTO: The logo of General Electric is seen at its plant in Baden, Switzerland November 15, 2017. REUTERS/Arnd Wiegmann/File Photo

The deal caps a review of the transportation division by GE dating back to last year after a string of setbacks for the 126-year-old company. But it also follows years of on-and-off talks between Wabtec and the GE unit about combining, Wabtec Chief Executive Raymond Betler told Reuters in an interview.

“We’ve always been quite interested. There has been a relationship between (us) that goes back decades,” he said.

“For a whole host of reasons, the stars kind of lined up this time, and it presented an opportunity for us to actually get it done.”

Betler will remain president and CEO of the merged company while its chairman, Albert Neupaver, has been re-appointed executive chairman. GE Transportation Chief Executive Rafael Santana will become president and CEO of Wabtec’s freight segment.

The resulting company will have approximately $8 billion in revenues, with 27,000 employees across 50 countries, the companies said. The transaction is expected to close in early 2019.

GE's transportation business, which generated revenue of $3.9 billion last year, is already larger than its sole close peer in the railroad engines business, Caterpillar Inc CAT.N, selling equipment and services to a global fleet of roughly 23,000 locomotives, Santana said.

The deal will add more offerings that can improve efficiency and safety to GE's customers, which include Komatsu Ltd 6301.T and Rio Tinto PLC RIO.L, as well as Wabtec's client base which includes Siemens AG SIEGn.DE and Bombardier Inc BBDb.TO, Santana added.

Wabtec, which has a market capitalization of $9.2 billion, manufactures equipment for locomotives, freight cars, and passenger transit vehicles.

Flannery told GE shareholders late last year he plans to pare GE down to three core businesses: power, aviation and healthcare, a departure from the deal-driven empire building of his predecessors, Jeff Immelt and Jack Welch.

That should include GE getting rid of at least $20 billion of assets through sales, spin-offs or other means.

GE’s stock has lost about half its value in the last year, and the company has been working with activist hedge fund Trian Fund Management LP, which sits on its board of directors, to turn the business around.