HONG KONG (BLOOMBERG) - In just five years, Hong Kong property tycoon Pan Sutong has gone from ranking among Asia's wealthiest people to having his company's flagship skyscraper seized by creditors chasing more than US$1 billion (S$1.3 billion) of debt.

It is a swift fall from grace for Mr Pan, 57, who was Asia's fourth-richest man in 2015 with a net worth of US$27 billion, according to the Bloomberg Billionaires Index. But after shares of his Goldin Financial Holdings plunged and with most of his properties locked up as collateral for loans, he has fallen off the list of the world's 500 wealthiest people.

Mr Pan's initial wealth came not from property but from dealing in and then manufacturing electronics, an area he ventured into after moving to Hong Kong from California, where he had spent his teens skipping school and hanging out at his family's chain of Chinese restaurants. He transitioned to property investing in 2008, a few years into a red-hot boom that would mint numerous fortunes in Hong Kong and make it one of the world's most expensive real estate markets.

Mr Pan now joins other investors in the city who over-extended themselves during the boom, only to be undone as months of civil unrest and the coronavirus pandemic plunged Hong Kong into its worst recession on record.

Mr Tang Shing-bor, a veteran investor known as the "Shop King" for his vast holdings of retail properties, is seeking to sell billions of dollars of real estate. A group of investors who paid US$5.2 billion for The Center in the world's most-expensive office deal, have been unable to flip floors as the market ground to a halt last year.

Mr Pan, and Goldin Financial, racked up around HK$38 billion (S$6.48 billion) of debt between May 2017 and September 2020 for four Hong Kong properties, according to stock exchange filings and data compiled by Bloomberg. At least US$1 billion of that debt remains outstanding and tied to Goldin, according to company filings last month.

Even a US$1.1 billion loan in September from CK Asset Holdings, backed by Hong Kong's second-wealthiest man Li Ka-shing, was not enough to help Goldin Financial.

Mr Pan moved from manufacturing consumer electronics such as mobile phones and MP3 players to property in 2008, when he renamed his electronics firm Goldin Properties Holding and purchased a listed company, christening it Goldin Financial. Goldin Properties was delisted in 2017 and Mr Pan owns a controlling stake in both firms.

Goldin Financial's downfall can be traced back to Mr Pan's strategy of splitting ownership of properties between the company and his own private interests.

Between 2011 and 2020, Mr Pan and Goldin Financial purchased one commercial and two residential properties. Goldin Financial took a 60 per cent ownership stake, while Mr Pan eventually held 40 per cent privately. There was a similar ownership structure for a majority stake in a third residential plot.

But starting in 2018, Mr Pan decided he wanted to take full ownership of one of the residential properties and a majority stake in another, which are located in Kowloon's prestigious Ho Man Tin neighbourhood and offered good profit potential.

In turn, he sold his share in the other two assets to his listed company. These included 40 per cent stakes in the Goldin Financial Global Centre, his firm's flagship office tower that was saddled with debt, and an expensive land parcel near the former Kai Tak airport that would have been costly to develop.

As a result, Mr Pan became sole guarantor for a HK$7.19 billion loan for one of the residential developments, according to people familiar with the matter. At least four banks involved in the loan did not agree to the terms of the deal and exited, they said. This made it harder for Goldin Financial to close subsequent credit lines.

The Kai Tak project subsequently hit snags. In late 2019, Goldin Financial failed to raise a loan partly to fund development of the site, the people said. The firm later sold the plot for about HK$3.5 billion, less than half what it had paid in 2018.

The company's eponymous skyscraper is at the heart of an asset grab by creditors after Goldin Financial failed to make timely payments on its outstanding debt. In July, lenders of the HK$3.4 billion loan demanded immediate repayment, while holders of a HK$6.8 billion senior bond threatened to take over the office block, which had been pledged as security.

Eventually, the receivers linked to the bonds successfully applied to Hong Kong's High Court to take control of the 27-story building, and were granted ownership in September. They have since entered an agreement to sell the building after a months-long tender.

Goldin said in an exchange filing on Sunday that it has been told by the receivers that the skyscraper's sale will be sufficient to repay both the bond and the outstanding loan. The listed company also said that its board is confident that once the sale is completed, legal proceedings relating to the bond and the loan "will be resolved amicably".

The sale will put Goldin Financial in the unenviable position of going from landlord to tenant as the building housing its headquarters passes from its ownership, a move that mirrors Mr Pan's own decline in fortunes.