Former chemical engineer James Ratcliffe is the founder, chairman and majority owner of chemical powerhouse Ineos Group. The London-based conglomerate produces everything from synthetic oils and plastics to solvents used to make insulin and antibiotics. It has also become one of the largest players in the U.K. shale sector after entering the market in 2014.

Stefano Pessina heads the world's largest drugstore chain, Walgreens Boots Alliance. Pessina bought over 1,500 rival companies across Europe, merged his UniChem Group with Alliance Boots and took it private in a $22 billion deal. Between 2012 and 2014, Walgreens bought 100% of his pharmacy chain, creating Walgreens Boots Alliance.

Eyal Ofer inherited part of his late father's shipping empire in 2011 and has expanded the holdings significantly. 

Brothers Richard and Ian Livingstone own properties throughout London including high-end shops, swanky hotels and tony apartments. Among their signature projects is Panama Pacifico, a master planned city they're developing in Panama with Colombian billionaire Jaime Gilinski Bacal. When finished, Panama Pacifico will include 20,000 residential properties, industrial parks and retail and commercial space. 

An heir to a Belgian sugar fortune, Eric Wittouck is a descendant of the family that founded Tiense Suicker. 

Simon Reuben shares a real estate, technology and investments fortune with his brother David Reuben.

Rybolovlev's fortune comes from Uralkali, Russia's largest producer of potassium fertilizers. He sold his stake for $6.5 billion in 2010

Sir David Barclay (born 27 October 1934) and Sir Frederick Barclay (born 27 October 1934) are British billionaire businessmen, jointly known as the Barclay Twins. They started their business journey by flipping houses in the 1950s and later ventured into the hotel industry with a notable acquisition of the Ritz Hotel in 1995. They have diversified their wealth into shipping, retail, and media. Beyond business, the brothers have made significant contributions to medical research, leading to their knighting in 2000.

According to Forbes' 2023 Billionaire List, the Barclay brothers rank #305, with a net worth of $5.6 billion.

John David Caudwell (born 7 October 1952) is a British billionaire businessman who founded the now defunct mobile phone retailer Phones 4u. He also invests in fashion, real estate and other industries, and chairs Caudwell Children, a children's charity, and Caudwell LymeCo, promoting chronic Lyme disease beliefs in the UK.

According to the Sunday Times Rich List in 2022, Caudwell is worth £1.58 billion. On the Forbes 2022 list of the world's billionaires, he was ranked #984 with a net worth of US$2.8 billion.

Steve Wynn (born January 27, 1942) is an American billionaire businessman, famed for his significant influence in the luxury real estate market. Wynn created a legacy with his high-rise resorts and casinos that have become landmarks in Las Vegas, Macau, and Monaco. Known for his ventures such as Mirage, Bellagio, and Wynn, he has greatly impacted the style of Las Vegas. Apart from his business interests, Wynn is also recognized for his vegan lifestyle, which he promotes through the menus of his restaurants.

As per the Forbes 2023 Billionaire List, Wynn ranks #679, boasting a net worth of $3 billion.

 Cristina Green own Topshop, Topman, Dorothy Perkins, Miss Selfridge and other British retailers through their Arcadia Group.

Bahaa Hariri (born 1966) is a Lebanese-Saudi billionaire investor, renowned for his business interests in real estate and logistics. The eldest son of former Lebanese Prime Minister Rafik Hariri, he parted ways from the family construction business, Saudi Oger, to establish Horizon Group. Hariri has invested heavily in real estate markets such as Jordan, Beirut, Amman, and Monaco. He is recognized for his role in the $5 billion revitalization project in Amman.

The Forbes 2023 Billionaire List ranks Hariri at #1157, with his net worth standing at $2.1 billion.

Sol and Eddie Zakay are chairman and deputy-chairman of Topland Group, an investment group with a substantial real estate portfolio.

An accountant by training, Farhad Moshiri once worked for such firms as Ernst & Young and Deloitte Touche. After meeting Russian billionaire Usmanov in the early 90's, he became his minority partner in several projects.

Maria Franca Fissolo is the widow of Michele Ferrero, who built Ferrero Group into one of the world's leading sweets companies

Megadealer David Nahmad with brother Ezra owns a stockpile of modern and impressionist art, stored in a duty-free warehouse in Geneva, Switzerland

Billionaire heiress Tatiana Casiraghi joined Monaco's royal family in 2013 after marrying Andrea Casiraghi, reportedly second in line to the throne.

Together with brother David, Ezra Nahmad is an international megadealer of modern and impressionist art, which they trade mostly at auction.

Manfredi Lefebvre d'Ovidio is the executive chairman of Silversea Cruises. In 1994, his father started the cruise line in Italy with two ships.

The son of a Greek Cypriot shipping magnate, Stelios Haji-Ioannou gets the bulk of his fortune from his stake in budget airline easyJet.

Brazil-born, Monaco-based billionaire Lily Safra inherited most of her fortune from her fourth husband, the late Edmond J. Safra, a banker.

Clelia Haji-Ioannou is the daughter of Loucas Haji-Ioannou, the late Greek Cypriot shipping magnate.

In 2010 David Yakobashvili together with his long-time partner Gavril Yushvaev and other shareholders sold the biggest Russian food producer Wimm-Bill-Dann (WBD) to US PepsiCo. For his 10.5% stake in the company Yakobashvili got more than $600m. He invested the money among other projects into Petrocas Energy Group: 135 gas stations chain in Georgia, Armenia, Azerbaijan and Kazakhstan and two oil terminals in Georgia ? in Poti and Batumi. In the end of 1980s became partner of Yushvaev. They own together popular casinos and dance clubs in Moscow. Yakobashvili married Yushvaev's niece. Yakobashvili has a collection of self-playing music instruments - pianos, grand pianos, street-organs, etc.

Polys is the son of Cypriot shipping magnate Loucas Haji-Ioannou, who at one point owned the largest private tanker fleet in the world.

Yiannakis Theophani "John" Christodoulou (born 24 May 1965) is a Monaco-based British billionaire property developer, the owner of Yianis Group, a privately held company with a portfolio of residential, hotel, retail and leisure properties in the UK and Europe.His Yianis Group employs over 7,000 people in the UK alone. As of May 2021, Christodoulou's estimated net worth is £2.35 billion. Through Yianis Group, Christodoulou is reportedly one of England's biggest freeholder landlords.

Alexander Vik comes from a wealthy family of fur merchants and has dabbled in everything from closed-end country funds to insurance and tech startups.

Malkin built his fortune in the banking sector, notably with his business partner Bidzina Ivanishvili. The two men founded Rossiysky Kredit, which was the third largest Russian bank until the financial crisis of 1998. He officially retired from business in 2004, when he became a member of Federation Council, representing the east Siberian republic of Buryatia (from 2004 to 2013). In 2012, headed a delegation of four Russian senators in Washington lobbying against the Magnitsky Act. Vitaly Malkin and his colleagues tried to convince American senators that Sergei Magnitsky was a criminal and that he died from pancreatitis.