Panthongtae Shinawatra (born December 2, 1979) (Thai: พานทองแท้ ชินวัตร; RTGS: Phanthongthae Chinnawat), nickname Oak, is the only son of former Thai Prime Minister Thaksin Shinawatra.
He became a billionaire after having been given a large portion of his father's stock in Shin Corporation which transferred to him shortly before Thaksin ascended to the position of prime minister.
Panthongtae was admitted to the Faculty of Engineering at prestigious Thammasat University in 1998. However, he dropped out after one year. In 2000, he enrolled in Ramkhamhaeng University, an open admission government university, where he studied political science. In August 2002, his studies attracted media attention when he was accused of cheating in an exam. A three-week university investigation concluded that Panthongtae had made a mistake by carrying unrelated notes into the exam room and he was cleared of wrongdoing, yet he automatically failed the political science subject he was sitting. He graduated with a bachelor's degree in 2003.
An amateur photographer, Panthongtae founded a production company called How Come Entertainment, which was awarded an exclusive advertising contract for the Bangkok Metro and many other government contracts when his father was prime minister. This caused controversy and drew charges of nepotism, as How Come was a new firm and the advertising concession for the subway had previously been awarded to the long established Triad Networks Company.
In early 2006, Panthongtae was involved in his family's sale of Shin Corporation stock to Temasek Holdings of Singapore. Thailand's Securities and Exchange Commission ruled that Panthongtae, as director of Ample Rich Investments (a shell company set up in the British Virgin Islands to control Shin stock), had failed to properly notify the regulators of his holdings in Shin and sale of Shin shares, in transactions that occurred in 2000, 2001 and 2002.
Prasong Vinaiphiat, deputy director of the Thailand Securities and Exchange Commission, said: "The case is not severe because Panthongtae did inform the SEC but his report was not totally correct." He was fined 5.982 million baht (about 150,000USD) for three violations of the Securities and Exchange Act.
Panthongtae has joined his father in self-imposed exile and now lives abroad.
In November 2009, Panthongtae founding VoiceTV (internet TV) with 3 hundred million Baht.