norm: telephone data systems inc deNAICS Telephone Communications (No Radiotelephone) · USno LEI · CIK 0001051512Max severity: Low

Canonical registry

TELEPHONE & DATA SYSTEMS INC /DE/

ent_019fa23312ed419fabb4bc6f896aba5a

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Disclosures

1

SEC 10-K Item 1C · 1 jurisdiction

Incidents

—

no linked incident in sample

Max affected reported

—

no filed count in sample

Leak-site claims

0

none in sample

Identity resolution

Canonical name: TELEPHONE & DATA SYSTEMS INC /DE/
Normalized: telephone data systems inc de— dedupe via name-norm; Microsoft / MSFT collapse to one row
GLEIF LEI: No match
SEC EDGAR CIK: 0001051512
Domain: tds.net

Disclosure history (1)newest first

FEDERALSEC 10-K Item 1Cas victim2026-02-24
TDS, Inc. (CIK 0001736229) filed its 10-K Item 1C disclosing its cybersecurity program. The filing explicitly states that no cybersecurity incidents have occurred that are material or reasonably likely to be material to its financial condition or operations. The document describes governance, risk assessment, and third-party oversight but reports zero actual breaches.