The Gunners chief says that all transfer calls are solely the decision of Arsene Wenger.
The Gunners have not won the top-flight crown since 2004, with their move to the Emirates having seen them spend considerably less over the years and focus on developing young players instead.
That saw them come in for stern criticism from their fans, who were keen to see the side keep up with the likes of Manchester City and Chelsea when it came to securing big-name signings.
Arsenal have changed tactics in recent years though by securing Mesut Ozil and then Alexis Sanchez for big fees in the last two seasons, and Gazidis says purchases such as those show their desire to win the title.
“We have been active in the transfer market in recent seasons,” Sky Sports reports him as saying.
"We have only added players because they add something tangible to our squad not just because we have money available. You don't sign players like Ozil and Sanchez unless you have ambition to win the league.”
Transfer decisions solely the decision of Arsene Wenger
The Gunners chief has also said that manager Arsene Wenger makes all of their transfer decisions.
The club came in for criticism again this summer as their only signing of the transfer window proved to be Petr Cech from Chelsea, with them being the only side in Europe’s top five leagues not to sign an outfield player.
That was of huge disappointment to the fans, who had hoped to see several new faces arrive to push them towards a potential title challenge this season following a strong end to the last campaign.
But Gazidis says that was solely the decision of their long-serving manager.
“Mesut Ozil, Alexis Sanchez and Petr Cech show how the board will release funds for signings at any point,” he added.
“You don't sign them without Arsene Wenger. All transfer are football decisions and are therefore made by our manager. We have invested record sums in building a team to challenge for the title. Talent leads, not money."