As well, 12 complaints of sexual harassment were made.
Of the bullying complaints, 25 were informally resolved, another 25 were unsubstantiated and four were withdrawn.
In five cases no outcome was listed.
Citing privacy reasons, the agency said it did not "routinely" break down numbers lower than four, and for the remaining outcomes including resignation, termination, final warning and an ongoing investigation, fewer than four were listed in each.
Four of the sexual harassment complaints were resolved informally, and fewer than four complaints were listed as withdrawn or unsubstantiated.
Fewer than four complaints were also recorded in the final warning, warning, settled and ongoing categories.
ACC acting chief people and culture officer Cain McLeod told the Herald the agency was committed to the health, safety and wellbeing of its people.
"We take any allegations of bullying and harassment seriously and seek to resolve all issues raised. Where appropriate, we thoroughly investigate using an external investigator."
McLeod said they had robust internal processes so that any employee who has been subject to bullying or sexual harassment in the workplace feels safe while the investigation is under way.
"We have a range of ways that employees can speak up about inappropriate behaviour. They can let their leader or senior leader know; contact our HR Helpdesk, Integrity Services; or email OK2Say, an independent and confidential service provided to ACC employees."
The Herald also revealed this month dozens of allegations of assault, bullying and sexual harassment had also been levelled at Ministry of Social Development staff from January 2017 to September last year.
Thirty MSD staff have been accused of assault and 38 reports of bullying were lodged against staff members in the same period.
