Boston Scientific Sinks 12% as Cyberattack Forces Guidance Cut: “A Challenging Year”
Published . Updated .
Key TakeawaysBoston Scientific shares fell as much as 12% after it cut its 2026 adjusted EPS outlook to $3. 16 to $3.
Directly affected
- BSX Boston Scientific+2.6% 30d
Named in this report.
Indirectly affected
- CIBR First Trust NASDAQ Cybersecurity ETF+9.3% 30d
First Trust NASDAQ Cybersecurity ETF: it holds cybersecurity firms. Linked by “cyberattack” (cybersecurity) in this story.
- CRWD CrowdStrike Holdings+19.4% 15d
CrowdStrike Holdings (prepackaged software): hacks and breaches raise demand for security software. Linked by “cyberattack” (cybersecurity) in this story.
- PANW Palo Alto Networks+6.9% 30d
Palo Alto Networks (computer peripheral equipment): hacks and breaches raise demand for security software. Linked by “cyberattack” (cybersecurity) in this story.
- FTNT Fortinet+7.7% 30d
Fortinet (computer peripheral equipment): hacks and breaches raise demand for security software. Linked by “cyberattack” (cybersecurity) in this story.
- XLV Health Care Select Sector SPDR
Health Care Select Sector SPDR holds the health sector that Boston Scientific belongs to, so it often moves with news about it.
- SYK Stryker+5.8% 30d
Stryker is a peer of Boston Scientific in surgical and medical instruments and apparatus; rivals often move on the same news.
- MMM 3M+0.8% 30d
3M is a peer of Boston Scientific in surgical and medical instruments and apparatus; rivals often move on the same news.
- BDX Becton, Dickinson and+10.6% 30d
Becton, Dickinson and is a peer of Boston Scientific in surgical and medical instruments and apparatus; rivals often move on the same news.
Price reaction, T-5 to T+3
| Ticker | T-5 | T-3 | T-1 | T0 | T+1 | T+2 | T+3 |
|---|---|---|---|---|---|---|---|
| BSX | -1.26% | +1.31% | base | -5.93% | after close | after close | after close |
| CIBRNo price data for this ticker | — | — | — | — | — | — | — |
| CRWDNo price data for this ticker | — | — | — | — | — | — | — |
| PANWNo price data for this ticker | — | — | — | — | — | — | — |
| FTNTNo price data for this ticker | — | — | — | — | — | — | — |
| XLVNo price data for this ticker | — | — | — | — | — | — | — |
| SYKNo price data for this ticker | — | — | — | — | — | — | — |
| MMMNo price data for this ticker | — | — | — | — | — | — | — |
| BDXNo price data for this ticker | — | — | — | — | — | — | — |
Closing-price change versus T-1, the last close before the story. T0 to T+3 fill in after each market close. Prices: Alpaca IEX.
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Boston Scientific Sinks 12% as Cyberattack Forces Guidance Cut: “A Challenging Year” Yahoo Finance
Source: Yahoo Finance
Semiconductors
| Company | When | Move | Status |
|---|---|---|---|
| BSX | that day | -5.93% | final price |
| BSX | three days earlier | +1.31% | final price |
| BSX | five days earlier | -1.26% | final price |
Trades by members of Congress and officials in the stocks in this story
- Rep. Kevin Hern sold Boston Scientific (BSX) (jointly held), worth $50,001 - $100,000 on 9 Sep 2026. That is 49 days before publication. Filed 25 Sep 2026. View the filing.
- Rep. Kevin Hern sold Boston Scientific (BSX) (jointly held), worth $50,001 - $100,000 on 4 Sep 2026. That is 54 days before publication. Filed 25 Sep 2026. View the filing.
- Rep. Kevin Hern sold Boston Scientific (BSX) (held by a dependent child), worth $1,001 - $15,000 on 3 Sep 2026. That is 55 days before publication. Filed 25 Sep 2026. View the filing.
- Donald J Trump, an executive branch official, sold CrowdStrike Holdings (CRWD), worth $100,001 - $250,000 on 21 Aug 2026. That is 68 days before publication. Filed 8 Oct 2026. View the filing.
- Rep. Gilbert Cisneros bought CrowdStrike Holdings (CRWD), worth $1,001 - $15,000 on 7 Aug 2026. That is 82 days before publication. Filed 10 Sep 2026. View the filing.
- Donald J Trump, an executive branch official, sold Palo Alto Networks (PANW), worth $15,001 - $50,000 on 28 Aug 2026. That is 61 days before publication. Filed 8 Oct 2026. View the filing.
- Donald J Trump, an executive branch official, sold Palo Alto Networks (PANW), worth $500,001 - $1,000,000 on 21 Aug 2026. That is 68 days before publication. Filed 8 Oct 2026. View the filing.
- Rep. John J McGuire III sold Palo Alto Networks (PANW) (held by a spouse), worth $1,001 - $15,000 on 31 Jul 2026. That is 89 days before publication. Filed 10 Aug 2026. View the filing.
- Donald J Trump, an executive branch official, sold Fortinet (FTNT), worth $500,001 - $1,000,000 on 21 Aug 2026. That is 68 days before publication. Filed 8 Oct 2026. View the filing.
- Rep. Rohit Khanna sold Stryker (SYK) (held by a spouse), worth $1,001 - $15,000 on 25 Sep 2026. That is 33 days before publication. Filed 7 Oct 2026. View the filing.
- Rep. Rohit Khanna sold Stryker (SYK) (held by a dependent child), worth $15,001 - $50,000 on 11 Sep 2026. That is 47 days before publication. Filed 7 Oct 2026. View the filing.
- Rep. Rohit Khanna bought Stryker (SYK) (held by a spouse), worth $1,001 - $15,000 on 4 Sep 2026. That is 54 days before publication. Filed 7 Oct 2026. View the filing.
Public disclosure filings, not a recommendation. The filing link is the source document. News use of these reports still sits under 5 U.S.C. § 13107(c).
How solid the semiconductors case looks
12 out of 100
“Boston Scientific Sinks 12% as Cyberattack Forces Guidance Cut: “A Challenging Year”” scores 12 out of 100. The score uses 1 sources.