Halloween Jack

What is Halloween Jack?

But its share price has taken a tumble over the last year, dropping up to 37% since September 2025. Its market cap currently sits at £3.39 billion.

The operator first started trading on LSEG’s main market in February 2016 under its previous company name GVC Holdings. This followed its delisting from the Alternative Investment Market (AIM exchange).

Its share price decline began after reaching an all-time high in September 2021. Over the course of five years it has slipped 73% to 530p.

What is Halloween Jack?

U.S. Patent No. 12,406,284, which lists Commerce Secretary and former Cantor CEO Howard Lutnick as its primary inventor, covers geolocation technology commonly used in sports betting.

Geolocation services, which are typically purchased through third-party vendors, are used by sportsbook operators to ensure that their clients are placing wagers from jurisdictions in which sports wagering is legal.

“During prosecution, the Examiner did not apply the material prior art or straightforward combinations presented here, which render every challenged claim obvious,” according to a DraftKings filing with the patent office.

What is Halloween Jack?

The difference is all about the risk function. A sportsbook employs traders to price bets and manage its exposure. An exchange provides an API through which firms compete to quote prices and supply liquidity.

“Here’s an API. Bernard and 88 other people can market-make all these request-for-quotes (RFQs),” Marantelli says. “Some people might come in and just do esports because they’re esports experts. Others do everything. Some focus on same-game parlays. But it’s a sportsbook.”

The institutional layer is largely invisible to customers presented with a P2P proposition. Retail users may technically trade against one another, but the depth required by a mass-market product cannot be supplied by occasional customers alone. Professional firms must be prepared to quote continuously and commit substantial capital.