The on-chain investigator ZachXBT has claimed to have identified the individual behind a mysterious "whale" who executed highly leveraged trades on platforms like Hyperliquid and GMX, generating substantial profits. The individual has been revealed to be a British hacker named William Parker.

According to ZachXBT's findings, Parker, who previously went by the name Alistair Packover, has a history of criminal activity. Notably, he was reportedly arrested in 2023 for allegedly stealing approximately $1 million from two casinos.

10/ Who is William Parker?

Last year WP was arrested for stealing ~$1M from two casinos in 2023 and was sentenced in Finland.

Prior to this WP was known as Alistair Packover (William Peckover) before later changing his name.

In the early 2010s AP made multiple news headlines… pic.twitter.com/4QxHS5ziXJ

— ZachXBT (@zachxbt) March 20, 2025

The "whale" gained notoriety for their high-risk, high-reward trading strategy, often employing leverage of up to 50x. This strategy resulted in significant profits, estimated to be around $20 million, but also involved substantial risk. One notable incident involved the trader intentionally liquidating a $200 million Ether position on Hyperliquid, which caused a $4 million loss in the platform's liquidity pool, while the trader themselves profited around $1.8 million.

This incident led Hyperliquid to revise its collateral rules for traders with open positions, aiming to prevent similar occurrences in the future. The trader then continued to trade and take multi million dollar positions, for example in chainlink.

ZachXBT's investigation has shed light on the identity of this previously anonymous trader, linking their trading activity to a known individual with a criminal background. This revelation highlights the increasing transparency within the cryptocurrency space, where on-chain analysis can be used to uncover the identities of even the most elusive traders.