Form 4 Filing for Sun Jian David

This filing details transactions made by Sun Jian David, a director at 111, Inc., involving Restricted Stock Units (RSUs) for Class A ordinary shares. On September 12, 2018, 18,366 RSUs were acquired. Subsequent acquisitions occurred on May 11, 2026 (378,737 RSUs) and May 12, 2026 (413,168 RSUs). The filing also reports the disposal of RSUs to cover tax withholding obligations on May 26, 2026 (29,280 RSUs at $0.27), May 27, 2026 (70,440 RSUs at $0.25), June 9, 2026 (12,000 RSUs at $0.23), June 10, 2026 (115,440 RSUs at $0.22), and June 11, 2026 (111,100 RSUs at $0.23). As of the report date, all reported RSUs have fully vested.