Shareholders will have to approve the takeover before its rubber-stamped.
The deal would end a turbulent spell on the Londons Stock Exchange (LSE) for Darktrace.
Founded in 2013, the Cambridge-based company has pioneered the use of AI for threat detection and prevention.
But the business has attracted severe criticism from investors.
Darktraces market impact
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Investment bank Peel Hunt also questioned the companys culture.
Darktrace stock has also been affected by concerns about co-founder Mike Lynch.
The British tech entrepreneur is currently standing trial in the US for alleged fraud.
Lynch is no longer involved in Darktrace management but remains a substantial shareholder.
Amid the controversies,Darktraces techhas also attracted acclaim.
Its most notable innovation is the tool ofunsupervised machine learning to analyse data at scale.
Any anomalies can then instantly trigger threat alerts.
Thoma Bravo said the takeover would bring the tech to more customers.
For the LSE, however, the departure of Darktrace is a major loss.
British chip designer Arm had also recently rebuffed London and opted instead fora US IPO.
Darktraces exit has sparked further alarm about the LSEs future as atech listing venue.
One of the themes of this years TNW Conference is Ren-AI-ssance: The AI-Powered Rebirth.
Story byThomas Macaulay
Thomas is the managing editor of TNW.
He leads our coverage of European tech and oversees our talented team of writers.
Away from work, he e(show all)Thomas is the managing editor of TNW.
He leads our coverage of European tech and oversees our talented team of writers.
Away from work, he enjoys playing chess (badly) and the guitar (even worse).
