Auckland District Court will on Tuesday release its verdict on the sole company left facing health and safety charges relating to the Whakaari/White Island disaster.
The December 2019 eruption killed 22 people.
Judge Evangelos Thomas will deliver a verdict on whether the island's owners, through the company Whakaari Management, put workers and tourists at undue risk.
It was the only company still awaiting a verdict after six other parties pleaded guilty and six had charges dismissed.
WorkSafe initially charged 13 individuals and organisations in 2020, and the trial began in July after a series of last-minute guilty pleas.
Whakaari had been a popular tourist attraction before the eruption. WorkSafe's case was that Whakaari Management put profits ahead of safety.
The company's lawyer argued it was the landowner, nothing more.