Some newly-regulated firms are suffering from "culture shock" and can't understand why they need oversight, says Financial Markets Authority boss Rob Everett.
And more areas of the market could soon be feeling this shock, with the FMA still working out how far its powers can stretch.
Five years on from when the market watchdog was set up, Everett made a speech in front of the trans-Tasman Business Circle on where the organisation was headed.
Since its inception the FMA had overseen an overhaul of capital markets law and Everett said the regulator had "matured rapidly".
"I'd say we are only just off the ground. That's not unreasonable given that we are barely two years into our new regime. So, overall, we remain in build phase. But we are in the final stages. As a proud Englishman, who grew up in a village bearing the great man's name, I'm always willing to paraphrase Sir Winston Churchill. So let me say that this is the end of the beginning," Everett said.