Flutter Entertainment PLC's stock experienced a significant decline of 5.69% during intraday trading on Monday. The sharp drop reflected heightened selling pressure on the shares.

The downturn was primarily triggered by a regulatory filing from a major shareholder. According to public documents, a significant shareholder submitted a Form 144 with the U.S. Securities and Exchange Commission, signaling plans to sell a portion of their holdings. This announcement raised immediate market concerns about potential large-scale selling pressure, prompting accelerated profit-taking from investors.

The selling sentiment was further amplified by broad weakness across the Casinos and Gaming sector. Peer companies, including DraftKings Inc. and MGM Resorts International, also traded lower during the session, indicating industry-wide pressure that contributed to the downward move in Flutter's share price.