Coupang Corp CEO Park Dae-jun has resigned following the company’s serious data breach, considered one of the worst in South Korea.

The company said the attack comprised personal information of about 33.7 million customers, including their names, email addresses, phone numbers, shipping addresses and certain order histories but not payment details or login credentials.

Park joined Coupang Corp in 2012 and became the company’s co-CEO in 2020. He was named the sole CEO in May as the company restructured its top leadership.

“I am very sorry that we disappointed the public with the recent personal data incident,” Park said in a statement. “I share the grave responsibility regarding the occurrence of the leakage and how it was handled, and decided to step down from all my positions.”

The e-commerce giant said it “deeply apologises for the worries the recent personal data leak has caused” and will work to recover customer trust and enhance security measures to prevent recurrences.

Coupang Corp’s US-based parent company, Coupang Inc, has appointed Harold Rogers, its chief administrative officer, as interim CEO of the Korean entity.

The resignation comes after the company was hit by one of South Korea’s worst data breaches, which is believed to have started in June.

Earlier this week, South Korean Prime Minister Kim Min-seok said the government would investigate any legal violations committed by the company. Police later launched a raid on the company’s office in Seoul as part of an investigation.

Coupang said the new interim CEO will focus on alleviating customer anxiety, settling the data breach issue both internally and externally, and stabilising the organisation.

The leadership shift indicates that the US-based parent company is actively addressing the personal data leak incident.