The figures come ahead of Wednesday's AGM where investors will quiz management over their plans for the Hinkley Point nuclear plant in the UK.
EDF, 85% controlled by the French state, has struggled to find the cash for its 66.5% stake in the project.
In April it pushed a final decision on the £18bn plant back to September.
Chief financial officer Thomas Piquemal resigned in April following an internal disagreement over whether to press on with the controversial project.
However, EDF has outlined plans to raise €4bn, with up to €3bn provided by the French government.
Credit rating agencies are due to assess the group in the coming days and their verdict on its finances will determine how easy it will be for the group to raise cash.
Meanwhile, tough market conditions mean EDF is cutting costs and planning to sell €10bn in assets by 2020, including a stake in French power-grid operator RTE.
On Tuesday the new chief financial office Xavier Girre, said the management was not considering spinning off any part of the group to raise money.
Its latest earnings report shows it has reduced its target for 2016 nuclear output to 408-412 terawatt-hour from 410-415.
The scaling down of its output reflects continuing problems at its Paluel nuclear facility in France where a steam generator collapsed during maintenance.
Sales fell 7% to €21.4bn in the first three months of the year, with sales in the UK down 9.8%.
The company said its earnings forecast for 2016 remained on track.

Services from Douglas to the UK were disrupted after the Ben-my-Chree, which sailed from Heysham, Lancashire, struck the pier on Sunday.
The Isle of Man Steam-Packet Company confirmed no passengers or crew were injured.
Four crossings between Douglas and Heysham were been cancelled following the the collision.
Chief executive Mark Woodward apologised to passengers and said it was an "unfortunate incident", adding the company would "do all we can to minimise the disruption".
A company spokesman said that on arrival in Douglas Harbour, the Ben-my-Chree "encountered significantly stronger than forecast easterly winds" and the vessel made contact with the King Edward Pier.
He said engineers worked through the night to assess any damage and a diving inspection had been carried out.
He added the Ben-my-Chree would return to service later, though its sailing at 19:45 GMT would be subject to "prevailing weather conditions".

Net income fell to $3.11bn (Â£2.03bn) compared with a year ago for the personal computer giant.
As its PC business continued to slow, the firm had relied on sales of its chips that go in data servers.
But the firm said demand for its server-chips was slowing.
However, Intel said its latest quarterly numbers were largely in line with expectations and that the results were "solid".
"We executed well in the third quarter and delivered solid results in a challenging economic environment," said Intel's chief executive Brian Krzanich.
The US-based firm also noted the introduction of its "breakthrough 3D XPoint technology, the industry's first new memory category in more than two decades."
Reports have said that Intel's bid to buy Altera Corp for $6.7bn in an attempt to expand parts of its chip business could be given the go-ahead from the EU as soon as this week.
The deal had been cleared by the US Department of Justice, but there were several antitrust issues surrounding it.
Intel hoped that its buy-up of Altera would help boost its higher-margin chip business, particularly for data-servers - and help it focus on chips for cars and watches, among other devices.
In a report released in line with its latest quarterly results, the firm said its outlook for the fourth quarter "does not include the potential impact of any business combinations, asset acquisitions, divestitures, strategic investments and other significant transactions that may be completed after OctoberÂ 13."
French energy giant EDF says sales fell 7% in the first three months of the year in the face of stiff competition, a mild winter and lower energy prices.
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A ferry crashed into a pier on the Isle of Man as the captain tried to dock in strong winds.
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The world's biggest chipmaker, Intel, reported a 6% fall in net income for the three months to September and cut its fourth quarter outlook for its important server-chip business.