The Canadian will earn an average of $18.8 million per year and remain with the franchise until 2032.
“I couldn’t be happier to sign an extension today,” Celebrini said.
"My teammates and I are ready to take another step toward the ultimate goal of bringing a Stanley Cup to this city and its incredible fans. I can’t wait to get going.”
After being selected first by the Sharks in the 2024 NHL Draft, he has become one of the best young players in the league and even set San Jose's franchise scoring record last campaign, scoring 115 points.
He made history in the 2025-26 season, joining legend Wayne Gretzky as the only player to achieve a 40-plus goal, 70-plus assist season before turning 20 years old.
“In just two seasons as a teenager in the National Hockey League and on the international stage, Macklin has established himself as one of the premier players in the world,” Grier said in a statement.
“We are extremely excited to have him secured and committed as the centerpiece of a core of talented players in San Jose."