Ulster have extended the contracts of Sam Carter, Michael Lowry and Tom Stewart until the summer of 2023 to complete a busy week a the province.
Robert Baloucoune, Luke Marshall, Alan O'Connor and Aaron Sexton agreed terms on Monday, before Ian Madigan and Rob Herring did the same on Wednesday. Ulster also signed Glasgow Warriors forward Leone Nakarawa this week.
Carter, who joined the province in the summer of 2019, has been a regular in the team this term and has captained the side on occasion.
"I have really enjoyed my rugby so far at Ulster and I think the squad is starting to build something special," he said.
"That's something I want to be a part of."
Lowry, who was born in Belfast, has been played in various positions in the backs, usually at full-back.
On retaining his services Head Coach Dan McFarland said: "Michael has become a well-established part of our team.
"As one of a crop of outstanding young players, he also understands the role he is going to play in driving this organisation to where he wants it to go.
"I'm looking forward to seeing him continue to thrive here at Ulster for the next two years."
20-year-old Stewart has signed a development contract, which is due to be upgraded to a senior contract in the summer of 2022.
He gained caps for the Ireland under-20s in last year's Six Nations tournament, which was ultimately called off without being completed. Ireland, at that stage, had won three from three in their matches.
"I grew up going to watch Ulster play on a Friday night, and since then I have always aspired to play for my home province," said Steward.
"I enjoyed coming up through the Ulster pathway, and it’s a surreal experience to sign a full-time contract with the club. I am excited as to what the next few years have to offer."