Swaminathan Gurumurthy is an Indian journalist editing the Tamil political weekly Thuglaq and chartered accountant.He is the co-convenor of the Swadeshi Jagaran Manch.

He was unhappy with the aggressive corporate "empire building" by Dhirubhai Ambani and believed Ambani's business practices were unhealthy for the nation. Goenka entrusted Gurumurthy with fighting Reliance Industries. Gurumurthy's articles in The Indian Express created stirs in the corporate world as they made publicly denounced a culture of corruption within the troubled conglomerate. India Today magazine ranked him #30th in India's 50 Most powerful people of 2017 list.

He has written articles in The New Indian Express highlighting the disadvantages of globalization. His articles espoused the mission of the Swadeshi Jagran Manch and the Rashtriya Swayamsevak Sangh as well as an uncompromising commitment to the unity of India.

He was the subject of media coverage when he publicly accused two then-senior Indian bureaucrats of being American moles. He indirectly named them in the New Indian Express article titled, "US plots Gujral-Sharif show" dated 20-09-1997. Later, in his article "Not one mole, Mr Prime Minister and Mr Jaswant, but Two!" dated 27-07-2006, he explicitly named Dr. V S Arunachalam and Naresh Chandra Saxena as the two moles.

Gurumurthy has never contested any election. In the 2014 General Election another person, a namesake of Gurumurthy who spelled his name differently ("S Gurumoorthy") was chosen by the Bharatiya Janata Party as its candidate in the Nilgiris parliamentary constituency in Tamil Nadu. Gurumurthy denied that he was the candidate in Nilgiris through tweets and interviews. The 4 September 2014 issue of The Hindu carried a news item titled, "Baffled by the unexpected spotlight,"in which it said "First his friends called to congratulate him for contesting from Nilgiris Lok Sabha Constituency. Even as he explained that he was not in the fray, another round of calls came on Monday from many who wondered why his nomination papers were rejected. Gurumurthy, Chartered Accountant and columnist, was baffled when his photo was flashed in some television channels which claimed that he was the BJP's candidate in the Nilgiris constituency." The New Indian Express on 8 April 2014 published a clarification, "1 Name, 2 Persons, Too Many Queries", for various news channel's faux pas in mentioning chartered accountant, S Gurumurthy as the candidate who was disqualified from Nilgiris.