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Security report for berkshirehathaway.com

Berkshire Hathaway Inc. · Finance · United States

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

69/100

Risk levelMedium

0–100, higher is better. How it is calculated

Berkshire Hathaway Inc. operates as a large diversified holding company with significant interests in insurance, energy, manufacturing, and financial services. The website serves primarily as an official corporate information portal targeting investors, shareholders, and the general public interested in company reports, shareholder letters, and governance. The business is well-established with a strong market position and multiple subsidiaries such as GEICO and Wesco Financial Corporation. Technically, the website is basic and lacks modern design elements, mobile optimization, and accessibility features. It uses Google Analytics and Tag Manager for user tracking but does not provide privacy or cookie policies, indicating compliance gaps. Security posture is moderate with domain transfer protections but lacks DNSSEC and security headers. Overall, the site is trustworthy but could benefit from modernization and improved compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

6 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics

      What to do: Document all third-party data sharing in your privacy policy

Need hands-on remediation? Email guard@offseq.com

Keep watching berkshirehathaway.com

This scan found 22 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
67
Security headers
65
Email security
65
DNS health
80
Network security
100
GDPR outside view
35
Average
69

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention berkshirehathaway.com, from OffSeq Breach.

Total records
13,669
Employees
0
Customers
138
Third parties
13,531
Weak passwords
1%

5 subdomains affected

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Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Berkshire Hathaway's website reflects its status as a major conglomerate with a diversified portfolio. The business model is centered on long-term investments and ownership of subsidiaries across multiple sectors, primarily finance and energy. The company targets investors and shareholders with detailed reports and letters from leadership. The website's minimalistic approach suggests a focus on transparency and official communication rather than marketing. The presence of links to SEC filings and annual meetings supports investor relations. The partnership ecosystem includes well-known subsidiaries like GEICO. Growth indicators are not directly visible on the site but the longstanding domain and consistent updates to shareholder letters indicate ongoing corporate activity.

Security posture

The security maturity level is moderate. The domain is protected with clientTransferProhibited status but lacks DNSSEC, which could improve DNS security. No security headers were detected in the HTML content, and SSL configuration details are not visible, which may indicate room for improvement. The absence of privacy and cookie policies is a compliance gap, especially under GDPR. No incident response or vulnerability disclosure information is provided, limiting transparency. The use of Google Analytics introduces moderate user tracking without visible consent mechanisms. Overall, the site is secure enough for informational purposes but should enhance security headers, DNSSEC, and privacy compliance to strengthen its posture.

Recommendations

  1. Enable DNSSEC to enhance domain name system security and prevent DNS spoofing.
  2. Implement standard security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to protect against common web attacks.
  3. Publish clear privacy and cookie policies with GDPR compliance details and implement a cookie consent mechanism.
  4. Provide explicit contact emails and phone numbers for corporate and security incident reporting to improve transparency and trust.
  5. Modernize the website design to improve mobile responsiveness, accessibility, and user experience while maintaining professional content.

Contact details published on the site

Addresses
Legal name
Berkshire Hathaway Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Berkshire Hathaway Inc.
Description
Berkshire Hathaway Inc. is a large diversified holding company with interests in insurance, energy, manufacturing, and other sectors. The website provides official corporate information, shareholder letters, annual reports, SEC filings, and investor presentations.
Key services
Insurance, Energy, Investment and Financial Services, Corporate Governance Information, Shareholder Communications
Content quality
basic
Branding
moderate

Technology

Stack
Google Analytics, Google Tag Manager, JavaScript
Performance
moderate
Mobile
poor
Accessibility
poor
SEO
basic

Security

Observed score
50/100
Good practices seen
  • Domain status clientTransferProhibited

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
poor

Advertising

Transparency
basic

Site quality

Design
poor
User experience
poor
Content relevance
good
Navigation
basic
Professionalism
basic
Trustworthiness
high

Key observations

  1. Website is a basic, informational corporate site with minimal modern design or interactivity.
  2. No privacy or cookie policies are present, which is a compliance gap.
  3. No visible security headers or advanced security features detected.
  4. Content is focused on shareholder and investor information.
  5. No contact emails or phone numbers explicitly provided, only a physical address.
  6. Use of Google Analytics and Tag Manager indicates moderate user tracking without visible consent mechanisms.
  7. No forms or data collection fields detected on the homepage.
  8. No social media links found in the HTML content.
  9. Website uses basic HTML with minimal styling and no CMS detected.
  10. No evidence of GDPR or other privacy compliance measures.
Technical notes

Notes

The website uses basic HTML with minimal styling and no detected CMS or modern frameworks. It includes Google Analytics and Google Tag Manager scripts for tracking. Hosting and registrar information indicate Network Solutions, LLC as the registrar, but hosting provider details are not explicit. Performance is moderate with no advanced optimization or mobile-friendly design. Accessibility features are lacking, and SEO optimization is basic with minimal meta tags. The site does not use DNSSEC and lacks security headers, which are technical risks. There is no evidence of forms or interactive elements collecting user data. Overall, the technical infrastructure is functional but outdated and could benefit from modernization and enhanced security controls.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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