The leaders of the Center Party, the Left Party and the Social Democrats, as well as the Green Party's two spokespersons, will attend the meeting.
The parties' economic policy spokespersons, parliamentary group leaders and party secretaries have also been invited.
The Center Party has previously said that the purpose of the meeting is for the parties to gain a shared understanding of Sweden's challenges.
The police are coming.
The meeting is also a way for the leaders of the four parties to be seen together, despite the red lines: the Left Party demands to be in government, while the Center Party refuses to govern with it.
A number of public agencies, trade unions and industry organizations have also been invited. The politicians will be able to hear from nine different groups.
They include the police, the National Institute of Economic Research (Sweden's government economic research agency), LO (the Swedish Trade Union Confederation), the Confederation of Swedish Enterprise, SKR (the Swedish Association of Local Authorities and Regions) and Fossil-Free Sweden (a Swedish climate initiative).
Afterwards, the politicians will also have time to talk among themselves.
No red lines softened
As recently as Tuesday, Social Democratic leader Magdalena Andersson, who on Friday was given the task of trying to form a government again by the speaker of parliament, said she had had good talks with all the red-green party leaders, but that no one had softened any red lines.
It is a process where it will be required that the parties that have drawn red lines make some kind of move for this to be resolved, Andersson said.
The parties have not planned a joint press conference in connection with Friday's meeting, which will be held at Högberga farm on Lidingö and is expected to last from 1 p.m. to 5 p.m.
Corrected: An incorrect time was given in an earlier version.
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