$BSX

Boston Scientific Falls on Sales Hit After August Cyberattack

Boston Scientific Corp. cut its sales forecast, citing a cyberattack in August that disrupted operations. It now expects Q4 sales to decline and full-year adjusted EPS of $3.16-$3.18, below analysts' estimate of $3.23. Shares fell 14% in premarket trading.

Original reporting
Published Oct 28, 2026, 12:56 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Oct 28, 2026, 1:36 PM UTC. Informational, not investment advice.
How this was made
AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
AlphAI market briefEarnings
Primary signal
$BSX
Bearish
high confidence
Mentioned
$BSX
Relevance
8/10
AlphAI data visualization · based on finance.yahoo.com
Decision brief

The 30-second read

$BSXBearishHigh
01

Why it matters

The guidance cut and immediate share decline suggest heightened short‑term risk for the stock.

02

Market read

First‑report of a material guidance downgrade for a large‑cap med‑tech firm, driving a notable pre‑market price drop.

03

What to watch

Potential insurance recoveries or cost‑saving measures post‑attack could mitigate earnings hit.

Relevance 8/10Novelty 8/10Timing: pre‑market today

Background

Boston Scientific disclosed a cyberattack that disrupted operations and prompted a downgrade of its full‑year sales outlook and earnings guidance.

Company-level read

Ticker impact

$BSXBearishHigh confidence
Context

Boston Scientific lowered its full-year adjusted EPS to $3.16‑$3.18 and warned Q4 sales will decline, sending the stock down as much as 14% pre‑market.

Expected impact

likely further downside as investors price in weaker outlook

Evidence & confidence

Guidance revisions are material for a large‑cap med‑tech firm and the stock already fell 14% on the news.

Market effects

May weigh on other med‑device peers as investors reassess demand amid cyber‑risk concerns.

Limited to U.S. markets; no broader regional effect noted.

Modest; primarily a company‑specific catalyst.

Counterpoint

If the cyberattack impact is short‑lived, the stock could rebound once operations normalize.

Key entities

  • Boston Scientific Corp.

    Medical device maker reporting weaker guidance after a cyberattack.

Related articles

$BSXHighAI 9/10

Boston Scientific Shares Fall 3.5% as Earnings Miss and Lower Guidance Offset Revenue Growth

Boston Scientific (BSX) shares fell 3.5% premarket after Q3 2026 earnings of $0.73 EPS missed estimates of $0.75, while revenue grew 1.5% YoY to $5.14B. Guidance for Q4 and full-year EPS was below expectations, with Q4 sales projected to decline 1-3%. The company cited a cybersecurity incident as a factor in operational challenges. Cardiovascular and MedSurg divisions saw revenue growth, but international performance was mixed.

$BSXHighAI 8/10

Boston Scientific cuts annual forecast after quarterly profit falls

Boston Scientific (BSX) reported Q3 net sales of $5.14B, up 1.5%, but GAAP net income fell to $582M. Adjusted EPS declined to $0.73. The company lowered its 2026 sales growth forecast to 4.25% and adjusted EPS guidance to $3.16-$3.18. Q4 sales are expected to fall 1-3%. CEO Mike Mahoney cited challenges, including a cybersecurity incident. Cardiovascular division sales rose 1.9%, while Asia-Pacific sales declined 1.1%.

$BSXHighAI 9/10

Why is Boston Scientific stock plunging today?

Boston Scientific (BSX) stock fell 11.9% in pre-market trading after its Q3 2026 results. The company reported adjusted EPS of $0.73, missing estimates, and lowered its Q4 and full-year 2026 guidance due to a cyberattack and competitive pressures. Net sales grew 1.5% YoY to $5.14B, slightly beating expectations. The stock neared its 52-week low.

$BSXMedAI 8/10

Boston Scientific stock drops on duidance cut (BSX:NYSE)

Boston Scientific (BSX) shares declined in premarket trading Wednesday despite Q3 2026 earnings beating expectations. The company reduced its full-year outlook, attributing the change to a recent cybersecurity incident. According to the company, the incident impacted its financial performance. BSX reported Q3 2026 financials but did not disclose specific figures in the provided text.

$BSXHighAI 8/10

Why is Boston Scientific stock sliding today?

Boston Scientific (BSX) shares fell 3.6% to $43.42 in pre-market trading after reporting Q3 2026 earnings. Adjusted EPS of $0.73 missed estimates by $0.02, while revenue of $5.14B exceeded expectations. The company cut Q4 and full-year 2026 EPS guidance due to a cyberattack and other challenges, citing a 1%-3% expected decline in Q4 sales.