PricewaterhouseCoopers Australia has disclosed the names of four former partners it says are responsible for confidentiality breaches to a parliamentary committee amid mounting pressure in the tax leaks scandal. The embattled professional services firm has also provided the names of several current partners associated with the leaked information who were directed to go on leave last week, along with an additional list of 63 current and former partners and staff who received at least one email containing confidential information. Sign up for Guardian Australia’s free morning and afternoon email newsletters for your daily news roundup “We’ve heard the calls from our stakeholders to release the names of those who were responsible for confidentiality breaches and we’ve been working as quickly as possible to determine that and to disclose these names to the Senate per their request, and we have now done so,” acting PwC Australia chief executive, Kristin Stubbins, said in a statement on Monday. “It is important for us to respect the ongoing investigations and legal processes to ensure this matter is investigated appropriately, and that is what we are doing.” The release of the names to the Senate committee was first reported by the Australian Financial Review earlier on Monday. The disclosures follow ongoing pressure from senators Deborah O’Neill and Barbara Pocock, who have been pressing PwC to release the names of all partners involved in the scandal. PwC Australia is now subject to multiple investigations, including a criminal probe, after its now former international tax chief Peter Collins used confidential information and documents obtained through his work for the government for the firm’s commercial gain. Collins, who has since had his tax agent status terminated, fed intelligence on government plans to toughen multinational tax laws to colleagues to win overseas business in actions that may have also robbed Australia of tax revenue. O’Neill said on Monday that PwC was using the “cloak of the Senate” to release the names, rather than doing so itself. “PwC should release these names themselves, and they should do it publicly,” O’Neill said in a statement. “The whole of parliament, the Australian public, and the international audit, assurance and consultancy sector deserve to know the identities of those who participated in this egregious breach of trust and assault against the interests of the Commonwealth.” Evidence given to or disclosed by a parliamentary committee is protected by a form of legal privilege. PwC’s new disclosures to the Senate can be separated into three groups. The first, containing the names of four former partners, are directly tied to the incident, according to PwC. The second group refers to current partners PwC directed to go on leave last week, pending the outcome of investigations. The third group, containing 63 names, received at least some of the confidential information, but weren’t necessarily aware of the confidentiality breach. The Senate’s public hearings into integrity in the consulting sector will continue this week with tax office and Treasury officials as well as representatives from PwC rival KPMG appearing. While PwC remains a focus of questioning, the scandal has triggered a broader discussion around conflicts of interest in the industry and whether it needs to be reformed.