* Gulf has biggest contingent at Egypt investment summit
* Governments aim to move Gulf ties beyond official aid
* Many businessmen expect state support for projects
* Political goodwill in Egypt may be advantage
* Uncertainty over Qatar participation
By Amena Bakr, Stanley Carvalho and Reem Shamseddine
DOHA/ABU DHABI/KHOBAR, Saudi Arabia, March 12 (Reuters) - G ulf Arab governments are encouraging - and in some cases pressuring - hundreds of companies to attend an international investment summit in Egypt this week, in a move that may help the firms become top players in a rebounding Egyptian economy.
Over 270 of about 1,300 foreign officials and executives registered for the event, which will declare Egypt open for business again after years of economic and political turmoil, are from the six wealthy oil exporting states of the Gulf.
That makes the Gulf the largest regional contingent at the conference, eclipsing Europe, which traditionally dominated foreign investment in Egypt before the Arab Spring uprising of 2011. The roughly 160 delegates from the United Arab Emirates far outnumber the 55 from the United States - though some of them are UAE-based representatives of Western firms.
The disparity in numbers suggests that initially at least, Gulf firms may grab the lion's share of the billions of dollars of investment opportunities on offer in sectors from power generation to real estate, finance, retailing and industry.
Egyptian officials have said they hope the conference, to be held from Friday to Sunday in the resort town of Sharm el-Sheikh, will confirm domestic and foreign investments worth up to $12 billion. Half the projects which Egypt will propose are expected to be in the energy sector, a minister said last month.
There are good reasons for Gulf firms to be interested in Egypt. Its 90 million population is nearly double that of the Gulf oil states, where markets are more mature and in many cases more competitive.
But there is also a strong political and diplomatic element, which appears to be shifting cost-benefit calculations towards Egypt in some Gulf boardrooms.
The UAE, Saudi Arabia and Kuwait, which oppose the Muslim Brotherhood of ousted Egyptian President Mohamed Mursi and are determined to ensure the success of his successor Abdel Fattah al-Sisi, are signalling to Gulf firms that they will back investment in Egypt politically and perhaps financially.
"There is support from the UAE government," Hussain al Nowais, chairman of Abu Dhabi's General Holding Corp (Senaat), a major state-owned industrial investment firm, said of UAE participation at Sharm el-Sheikh.
"The UAE and Egypt have a strategic relationship - our leadership is committed to Egypt. So many projects are going on, on the government and private sides," Nowais, who will attend the conference, told Reuters.
An 18-page pamphlet released by UAE authorities in the run-up to the conference describes Abu Dhabi's deep involvement in engineering Egypt's economic recovery.
In addition to direct financial aid, the UAE is "garnering economic and political support for Egypt" and providing technical assistance in designing its economic programme, partly by hiring expert consultants from around the world.
Stimulating corporate investment is key to the plan. Since Mursi was ousted in mid-2013, the governments of the UAE, Saudi Arabia and Kuwait have averted a financial crisis in Cairo by providing it with $23 billion of oil shipments, cash grants and deposits in the Egyptian central bank.
Such heavy official aid cannot continue indefinitely; it could make Cairo dangerously dependent on the Gulf, and the Gulf's state budgets are in any case being pressured by the plunge of oil prices since last June.
So officials in the Gulf and Cairo say they want to move economic assistance into a new phase, in which corporate capital from the Gulf helps revive economic growth and create jobs.
To some extent, the Gulf will be doing what it has already done successfully in its own economies. Many of its big banks and other companies are linked to governments through large minority shareholdings, while members of ruling royal families play important roles as investors and executives.
For example, state-linked property developers and investment firms have built much of Dubai in the past two decades, basing projects on the government's long-term economic strategy as well as shorter-term profit goals. Saudi Arabia is building new industrial cities through public-private partnerships.
Gulf businessmen going to Sharm el-Sheikh said they expected their governments to provide some degree of financial support for many projects on offer there - for example, by guaranteeing purchases of electricity from new power plants.
"Definitely Saudi will support (investments) from the Public Investment Fund, from the project finance point of view," said Yassin al-Suroor, chief executive of A'amal Group, a private Saudi engineering group.
More broadly, Gulf investors may be able to count on political goodwill in Egypt to navigate its considerable bureaucratic and legal obstacles - an advantage which U.S. and European companies, whose governments have had sometimes strained relations with Cairo, may lack.
"If you don't have the political will to support the commercial business, it will not be as strong," Osama Bishai, CEO of Egypt's Orascom Construction, said in the UAE. "We're happy cooperation is very strong between the two governments, and it will allow us to work closely with entities in the Emirates."
There is a question mark over the participation at Sharm el-Sheikh of one rich Gulf state: Qatar, which had close ties with Mursi and now has an uneasy relationship with Sisi's government.
A copy of the conference's guest list obtained early this week showed just one businessman from Qatar attending, from a hypermarket chain. Industry sources said the government in Doha was pressuring other firms to attend, but for now at least, many Qatari firms may miss out on any Egyptian investment bonanza.
Officials at Qatar's economy ministry were not available to comment on who would go, while the Qatari foreign ministry did not respond to a request for comment on relations with Egypt. (Additional reporting by Matt Smith in Dubai; Writing by Andrew Torchia)