ASOS Shares Plunge 13% After App Push Notification Claims Hackers Breached Systems

ASOS (LON: ASC) shares fell as much as 13% on Tuesday, October 6, 2026, after customers of the British online fashion retailer received a push notification through its app claiming hackers had breached the company's systems. The message, directed at ASOS's data protection officer and IT department, stated the attackers had "fully compromised the Snowflake instance" and threatened to leak data unless contacted. The notification included a link to a Telegram chat. An ASOS spokesperson declined to confirm or elaborate. Snowflake did not respond to requests for comment. Snowflake (NYSE: SNOW) shares fell as much as 3.2% in premarket trading in New York. The selloff marked ASOS's steepest single-day move since September 2025. The stock recovered some ground after the initial drop. Before Tuesday, ASOS shares had gained over 60% in 2026. At the close of its 2026 fiscal year, ASOS counted 16.4 million active customers across more than 100 markets.