Northern Ireland minister Mike Penning has been moved to the Department of Work and Pensions.
Conservative MP Greg Clark has been reshuffled from financial secretary to the treasury to cities and constitution minister.
Conservative MP Esther McVey has been promoted from minister for the disabled to employment minister.
She was said to have "looked happy" as she left Downing Street.
Northern Ireland minister Mike Penning has just driven into Downing Street
The Conservative minister for the disabled Esther McVey has just walked into Downing Street.
She said there was "no news yet."
Fisheries minister Richard Benyon will leave his position and return to the backbenches, the Conservative MP said.
On back benches! 3 and half really fun years with much achieved. Really appreciate time working with outstanding Ministers and Officials
Inside Number 10, I am told, the reshuffle phone calls are still being made.
That suggests either a) a long list of changes, or b) some rejections.
There will be no more Cabinet changes for the Liberal Democrats, I am told.
And David Cameron will be sticking with his Cabinet team too.