Amnesty bill protesters are urging a boycott of products and services with links to the Shinawatra clan, posting a long list online.
The list covers various items, from internet services, hospitals, restaurants and coffee shops to commercial banks, hotels and golf courses.
A group of anti-government demonstrators also turned up at Shinawatra Tower 2 on Phahon Yothin Road yesterday to protest against Shinawatra family businesses.
Thaksin Shinawatra (AP File Photo)
They also broke up an SIM card of the AIS telecom giant, a company which was formerly controlled by former prime minister Thaksin Shinawatra, as a symbol of their boycott.
Ex-Democrat MP Suthep Thaugsuban, a leader of the anti-government rally at Democracy Document, on Friday announced four new protest measures.
One of them is for supporters to boycott any products or services sold by firms affiliated with the Shinawatra business empire.
The other measures are a signature campaign to impeach the 310 MPs and senators who supported the amnesty bill; to condemn people he described as Thaksin "sidekicks", and a nationwide strike by civil servants.
The list, created by an unidentified person, comprises about 40 goods and services which have owners, co-owners or shareholders that are currently or formerly linked to the Shinawatra family and the Pheu Thai government.
Among them are housing estates and condominiums of the SC Asset company, the SC Park hotel, Capital OK, a personal finance company, and Shinawatra University.
Also included on the list are businesses owned by Thaksin's son, Panthongtae, such as How Come Entertainment and She @ Mood photo shop.
Advanced Info Service chief Wichian Mektrakarn said the company and its parent company Intouch have not been connected to the Shinawatra family for years, since the family sold its stake to Temasek Holdings of Singapore.
"The company operates its business professionally with transparency as a listed company of the Stock Exchange of Thailand," Mr Wichian said.
He declined to comment on how the boycott was affecting the company.
"To be fair to the company, AIS operates its business under normal mechanisms to ensure the best quality of service to customers," he said.
"I personally respect the beliefs of people and hope they will look at us with fairness."