Striker Oli McBurnie has committed his long-term future to the club, penning a new three-year deal with the option of a further year, having scored 19 goals in all competitions since arriving on a free transfer from Las Palmas last summer.
The 29-year-old Scotland international, who previously played for Sheffield United, Swansea City, Bradford City and Barnsley, scored the winning goal in Hull's Championship play-off final victory over Middlesbrough at Wembley to help secure promotion to the Premier League.
"I am delighted," McBurnie said. "I came here last year, and we had an amazing year as a team and as a club. When we spoke in the summer, it was quite an easy deal to get done and it was a no-brainer on my side.
"Me and my family are so settled here and my kids love being back home as well as my fiancé, so it was a no-brainer for me and ready to attack this year.
"It genuinely was an easy decision for me. I can honestly say it is a place that I would like to finish my career here."
Matt Crooks and John Egan have both signed new two-year contracts, each carrying the option of a further year, while defender Charlie Hughes, winger Mohamed Belloumi and midfielder Regan Slater have agreed fresh terms running until the summer of 2029, with a club option of an additional year attached to all three deals.
"It's great to sign a new deal," Crooks said. "There was more push from me than there was from the club to be fair! I have had a great time here so far. We're a real tight-knit group and we've had more additions this year, but we still have a good core and the new additions have been great so far. From my side of things, it was a no-brainer!"
Republic of Ireland international Egan, one of Hull's more experienced defenders, echoed the sentiment.
"I'm really enjoying my football here," he said. "Ever since I came to the club, I've really enjoyed it. I'm delighted to sign a new contract and I'm looking forward to the future."
The six extensions come as Hull look to build on their return to the top flight, with the club having made a strong start to the new Premier League season under head coach Sergej Jakirovic.