Sebi said it had also issued notices to the company's erstwhile executive vice chairman K V L Narayan Rao, but proceedings against him abated due to his death late last year.

The regulator said the persons in charge of a company or the principal officer are liable for the compliance of clause 36 of the listing agreement, which deals with disclosure by a listed company of any share price sensitive information.

Sebi noted that Prannoy and Radhika Roy were the Executive Co-Chairpersons and Chandra was the Group CEO and Executive Director constituting the top management of the company, while Juneha was the Company Secretary and Compliance Officer.

"These people constitute the management of the company who are responsible for the day-to-day and overall operations of the company. Further, it is an admitted fact that the decision not to disclose the tax demand was a conscious decision taken by the management of NDTV," the Sebi order said, while finding the four persons to have violated the listing agreement and therefore liable to a penalty.

Sebi said it has taken note of NDTV having been already penalised of Rs 20 million through a different proceeding with respect to non-disclosure of the said income tax demand of Rs 4.50 billion.

"For the purpose of imposing penalty, I have taken cognisance of the fact that for the same violation, Noticee no-1 (NDTV) was already penalised and therefore I am inclined to take a lenient view and impose a penalty of Rs 3 lakh on each Noticee nos 3 to 5 (Prannoy Roy, Radhika Roy and Chandra) for violation of Clause 36 of the Listing Agreement...," the adjudicating officer said in the order.

Besides, Juneja was fined Rs 3 lakh for violations of Clause 36 of the Listing Agreement and of another clause relating to Code of Corporate Disclosure Practices under Sebi's insider trading regulations.

Sebi said it conducted investigation based on a complaint received from Quantum Securities, a shareholder of NDTV, that NDTV did not disclose the order of Dispute Resolution Panel-II of the Income Tax Department, within 2 days of receipt of information, to the stock exchanges.

There was also allegation that Vice Chairperson of NDTV had engaged in insider trading by selling his shares based on the information about DRP-II order and did not make the required disclosures to the stock exchanges regarding the sale of his shares as required under Sebi (Prohibition of Insider Trading) Regulations, the order said about the case.

The first adjudicating officer for the case was appointed in August 2015, while show-cause notices were also issued in the same month.

The allegations included about Rao having made delayed disclosure to the stock exchanges about share sale transactions worth Rs 5 lakh, and NDTV having made delayed disclosure regarding the tax demand of Rs 450 crore raised against the company by the Income Tax Department.

NDTV was also accused of making delayed disclosures about Rao's disclosures, while it was alleged that Roys, Chandra and Juneja were also liable for these infractions being the executives in-charge of the firm.

In their submissions, Rao and others denied any lapses on their part and had said they had made all the required disclosures in a timely manner and it had found the tax demand "devoid of any merit in law".