Chris Fusaro, Ryan Grant and Duncan Weir have all agreed two-year contract extensions with Glasgow Warrirors, keeping them at the club until 2014.
Chief executive Kenny Baillie told the club's website that the agreements were vital to the club's progress in the RaboDirect PRO12.
"Chris, Ryan and Duncan have proved they are key players," said Baillie.
"It sends a positive message to our support and allows the players to focus on delivering quality performances."
Fusaro joined the Warriors on his first professional contract last summer, shortly after being called up to the Scotland A squad for the IRB Nations Cup in Romania.
A combative openside flanker, the 22-year-old has played a leading role in the first month of this season's campaign.
"It's really pleasing to know I'm going to be part of Glasgow Warriors for the foreseeable future," said Fusaro.
"I've loved my time at the club so far, and have learned a massive amount from being around quality international players.
"We've got a young and hungry squad, and that's going to stand us in good stead for what should be a really positive phase in the club's development."
Grant, 25, joined from rivals Edinburgh in June 2010.
The former Border Reivers man was a central component of the Scotland A side that maintained a 100% record throughout the 2010/11 season, and duly won a call up to the wider Scotland squad for the Rugby World Cup, missing out on final selection.
"There's no doubt that these are exciting times for the Warriors," Grant said.
"The guys are really taken with the prospect of playing our games at Scotstoun Stadium next season, and I want to play my part in helping the club continue to thrive.
"I feel like I've been part of the group for a long time despite only having signed last summer, and I think that speaks volumes for the atmosphere and working environment."
Stand-off Weir, 20, has established himself in the Warriors squad since stepping up to the professional tier in 2010 and added: "As a Glasgow boy through and through, I take huge pride in wearing the Warriors jersey.
"There's no better place for me to continue to come on as a player. I'm up for the fight of securing a place in the team and helping the club achieve success."
Glasgow Warriors head coach Sean Lineen is pleased to have secured the trio on extended deals.
"It's great to have those guys secured," he said. "I'm sure they'll want to follow up the announcement with a strong performance against the Dragons [on Friday]."