Jimmy Adams, James Tomlinson and Danny Briggs will remain Hampshire players until the end of the 2016 season after signing new contracts.
The current deals of the trio, who all played vital roles in helping Hampshire secure promotion to LV= County Championship Division One last term, were due to expire at the climax of 2015.
Club captain Adams and paceman Tomlinson continue their long affiliations with the club that they made their debut for in 2002.
The former has been a consistent performer with the bat at the Ageas Bowl, moving past 10,000 first-class career runs during 2014.
The 34-year-old hit 1,000 of those runs in the championship, where he captained Hampshire to the Division Two title for the first time in their history, and also topped the club’s run-charts in the NatWest T20 Blast.
Adams said: “I’m very happy – 2014 was a fantastic year for the team and for myself so it’s fantastic that I have extended my stay.
“I’ve now got to make sure I put the same amount of effort in over the winter to make sure we have another successful season. As long as I feel like I’m contributing to the team I’d like to stay at Hampshire for as long as possible.”
Left-armer Tomlinson was Hampshire’s leading wicket-taker in the championship, for the second successive season, and Royal London One-Day Cup in 2014, with 47 and nine scalps respectively.
The 32-year-old hurried Hampshire to the title against Glamorgan in September, taking 6-48 in a convincing 291-run victory.
He said: “I’m delighted to have signed a new deal at Hampshire – it really is an exciting time to be at the club and we’re all looking forward to the big challenge we are going to face next season.”
Spinner Briggs, who has played one one-day international and seven Twenty20s for England, again showed his quality with the ball last season.
The 23-year-old’s tally of 21 wickets in the Blast was the joint-third best in the competition and his 27 victims in the championship came at an average of 26.
“I’m really pleased to have signed a new deal and hopefully I can continue to contribute to the team and help us win games,” Briggs said.
“I was happy with how I played this year so it’s nice to get rewarded for that and we’re all really looking forward to what will be a big season for the club in 2015.”
Hampshire director of cricket Giles White added: “It's great to have key players committing to the club.
“All three have come up through the system and all show a genuine passion when representing the county.
“There is a nice balance to the squad, a good blend of experience and young talent, and it's encouraging that the core of the group are here for the long term.”