David Siang Hai Teoh is an Australian businessman. Until March 26, 2021, he was the executive chairman of TPG, a company he founded with his Taiwanese wife Vicky in 1992 after emigrating from Malaysia in 1986. ^[1] He is also the founder and executive chairman of Tuas Limited, who owns Simba Telecom, a telecommunications company in Singapore. ^[2]

TPG started off as a computer retail company, but several acquisitions including the purchase of a mobile spectrum licence, have contributed to its success as a major internet service provider. ^[3]

In August 2018, Teoh announced TPG was in discussions with Vodafone Hutchinson Australia about a proposed $13 billion merger. ^[4] Teoh's only comment about the proposed merger was the pricing would be “very aggressive” and that it would bring value to the customer. ^[5] It was blocked by the Australian Competition & Consumer Commission on the grounds that it would lessen consumer choice in both the internet and mobile phone markets. ^[6] In early 2020 Vodafone and TPG were granted permission by the Federal Court to merge, paving the way for the stalled $15 billion deal to finally proceed. ^[7]

Reclusive, Teoh has only been photographed in public twice. A photographer staked out his house for three days in 2015, ^[6] and in 2019 the proposed merger with Vodafone obliged him to attend court.

His four sons, Shane, Jack, John and Bob, have launched more than a dozen startup companies dealing in clothing, furniture, technology, and eyeglasses. In 2016 it was reported that his wife, Vicky, had substantial investments, including Vita Life Sciences Ltd, a pharmaceutical and healthcare company. ^[8]

According to Forbes magazine, in 2019 Teoh was the 25th-richest person in Australia, estimated to have a net worth of approximately US$1.62  billion. ^[9] As of May 2023 ^[update], the net worth of Teoh and his wife was assessed in the Australian Financial Review Rich List at A$1.70 billion. ^[10]

Year	Financial Review Rich List		Forbes Australia's 50 Richest
	Rank	Net worth ( A$)	Rank	Net worth ( US$)
2013 [11]			29	$0.91  billion
2014 [12]			17	$1.50 billion
2015 [13]			17	$1.60 billion
2016 [14]			9	$1.95 billion
2017 [15] [16] [17]		$1.91  billion	29
2018 [18]	38	$1.76 billion
2019 [19] [9]	38	$2.03 billion	25	$1.62 billion
2020 [20]	32	$2.54 billion
2021 [21]	40	$2.55 billion
2022	43	$2.60 billion
2023 [10]	82	$1.70 billion

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	Has not changed from the previous year
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