Boston Scientific Corporation (NYSE: BSX), the Marlborough, Massachusetts-based maker of pacemakers, defibrillators and the WATCHMAN heart implant, saw its shares fall sharply after disclosing a cyberattack that has disrupted its ability to process and ship customer orders.
The stock closed down 3.39% at $48.17 yesterday, having fallen as much as 5.9% intraday, versus a previous close of $49.86. That leaves shares close to their 52-week low of $42.20, far below the 52-week high of $109.50.
Boston Scientific said in an SEC filing that it identified a cybersecurity incident on Tuesday affecting IT systems and business applications, causing what it called a global disruption. The company said the incident has limited its ability to process and ship customer orders, and that it has activated incident response protocols and engaged third-party cybersecurity experts. It has not disclosed whether the disruption affects implanted devices. The company said: “While the company is working diligently to restore affected functions and systems access, the timeline for a full restoration is not yet known.”
The scope and financial impact of the incident remain undetermined, leaving markets to price an open-ended shipping disruption at a company already under pressure. The disclosure follows a guidance cut last month, when Boston Scientific lowered full-year 2026 adjusted earnings guidance to $3.28-$3.32 a share and organic sales growth to 5%-6%, citing weaker demand for WATCHMAN and competitive losses in electrophysiology, the field of treating abnormal heart rhythms. Shares had already lost roughly 53% over the preceding twelve months.
Broker TD Cowen maintained a Buy rating and $56 price target on the stock after the disclosure, while noting that the recent guidance cuts had already prompted significant reductions to revenue estimates through 2027.
With the investigation still under way and no restoration timeline confirmed, the extent of any lost sales from the disrupted order and shipping systems remains the key unknown for the stock.