FEDERALMalwareTechnologyInformationRansomwareData EncryptedLowContained

SITEONE LANDSCAPE SUPPLY, INC.

bd_3c464d841c7a2970 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Feb 19, 2026

To disclose

—

Affected

Not disclosed

Confidence

66%

Full breach record for SITEONE LANDSCAPE SUPPLY, INC. →2 incidents on file

The Company disclosed a July 2020 ransomware attack on its IT systems in its 10-K Item 1C. The incident resulted in no material financial impact. The Company maintains a comprehensive cybersecurity program including NIST framework alignment, third-party penetration testing, employee training, and incident response retainers. No specific malware family or threat actor was named.

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Incident timeline

Jul 1, 2020

Begins

Feb 19, 2026

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.No incident reportedView incident

Name: SITEONE LANDSCAPE SUPPLY, INC.
norm: siteone landscape supply
SEC CIK: 1650729

Name: SITEONE LANDSCAPE SUPPLY, INC.
norm: siteone landscape supply
SEC CIK: 1650729
Industry: Technologyllm

Discovered: —
Breach occurred: Jul 1, 2020
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: —
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: ExternalFinancial

During the incident: Engaged a leading cybersecurity incident response firm to provide immediate support
Changes made: Maintain an information security program based on NIST framework
Utilize Geo-IP blocking to restrict access from outside North America
Provide regular security and privacy workforce training
Deploy regular network and endpoint software updates
Maintain a disaster recovery plan and perform at least four disaster recovery exercises annually
Conduct quarterly phishing exercises
Regularly engage third-party cybersecurity experts to conduct vulnerability assessments and penetration testing
Maintain a retainer with a top-tier cybersecurity partner
Maintain cybersecurity liability insurance
Manage cybersecurity risks related to third-party IT providers through vendor security protocol
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statementThis record

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.sec.gov/Archives/edgar/data/1650729/000165072926000005/site-20251228.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Feb 19, 2026
Raw hash: 4434c2b2da86fd9f6c882e80fbaa8513b0ff976d2a1107365a56a0c3d7cec990

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Reporting entitySITEONE LANDSCAPE SUPPLY, INC.

Victim entitySITEONE LANDSCAPE SUPPLY, INC.

IncidentRansomware

Stated responseEngaged a leading cybersecurity incident response firm to provide immediate support

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing