Smith & Nephew PLC (SNN) shares tumbled 5.54% in pre-market trading, driven by a pronounced sell-side order imbalance on the New York Stock Exchange.

The NYSE reported a sell-side imbalance of 41,040 shares for SNN, meaning sell orders significantly outweighed buy orders. This exerted heavy downward pressure on the stock, with no other company-specific developments or broader market catalysts surfacing to account for the move.

The medical device maker’s pre-market plunge reflects the weight of the order imbalance as sellers dominated the session.