The secondary share sale, designed to provide liquidity to current and former employees, could amount to $6 billion.
The employee and early investor auction valued the workplace trust company at over £100 million and marked the third transaction conducted under the PISCES framework.
Existing investors in the German robotics startup, including Sequoia and Lightspeed, participated alongside new backers.
The deal valued the San Francisco-based software company at $2.5 billion, with Accel and 01A participating alongside new investors Salesforce Ventures and S32.
Goldman Sachs Alternatives, Wells Fargo, and DocuSign joined the deal, which valued the AI company at $5.2 billion.
The $600 million secondary deal will reportedly comprise stakes in five technology companies, including OpenAI, while providing a new commitment to Anthropic.
Venture secondaries platform Forge won a reprieve from Anthropic's blacklist, while rival Hiive remains stuck in the Claude-maker's crosshairs.
The Claude maker is reportedly seeking to raise $30 billion in what would be its largest funding round to date, at a $900 billion valuation.
The secondary sale reportedly fell short of its $6 billion expectation as employees look towards a highly anticipated IPO.
The Claude-maker is reportedly pursuing the secondary share sale alongside a primary funding round.
