Sullivan's complaint described Archegos as a "personality cult" that rewarded unwavering dedication to its founder and God, adding that Hwang ran the firm as his "personal fiefdom" with the sole purpose of becoming "the richest person in the world".
A lawyer for Hwang declined to comment. Hwang has pleaded not guilty to the federal charges against him.
Sullivan is seeking to recover US$50 million ($81.2m) in deferred bonuses. Some of the money, he alleged, was wrongly transferred to Grace and Mercy, which he characterised as an "alternative cash vehicle where Hwang and select 'good followers' could go and be insulated from creditors in the event Archegos failed".
According to Sullivan, Hwang often described himself as "the money guy who teaches the Bible to pastors" and exhibited "megalomaniacal delusions of grandeur, entitlement, and a brazen willingness to break the law".
The lawsuit traces the arc of Hwang's career, including his rise as a protégé of the legendary hedge fund manager Julian Robertson, his US$44m settlement with the Securities and Exchange Commission on insider trading charges and the subsequent launch of Archegos. It describes a brazen attitude to investing where Hwang sought to generate "extraordinary returns . . . even if he needed to break the law to do so".
The Financial Times reported in August that Archegos employees were facing losses of about half a billion dollars after the value of the deferred pay plan crashed along with its other investments.
Hwang's aggressive trading tactics backfired in March 2021 as ViacomCBS, now known as Paramount Global, fell by almost a third in just a few days, hitting the value of Archegos's holdings.
New York-based Archegos quickly unravelled, losing billions of dollars that included Hwang's own wealth as well as money contributed by employees as part of a mandatory plan set up by the firm. According to the lawsuit, employees were told that the deferred bonus scheme, as it was referred to, would be protected and there was "no downside risk".
In March last year, Hwang convened a firmwide call to discuss the crisis, according to Sullivan's lawsuit.
Archegos co-chief executive Andy Mills, who is named as a defendant in the lawsuit along with Hwang and others, warned employees that they should not resign in the hope of triggering a contractual clause that allowed leavers to demand repayment of their deferred compensation.
Mills could not immediately be reached for comment.
"Deferred comp is zero," he said on the March 2021 call, according to the complaint. "[It] no longer exists."
Written by: Ortenca Aliaj and Mark Vandevelde
© Financial Times