Montrose Environmental Group, Inc
ent_f21c4ed00a8d8893c15feecb
Disclosures
4
SEC 10-K Item 1C · State AG · Leak Site · 4 jurisdictions
Incidents
1
filings grouped by incident
Max affected reported
269
nationwide · State AG ME
Leak-site claims
1
unverified actor claims
Identity resolution
- Canonical name
- Montrose Environmental Group, Inc
- Normalized
- montrose environmental— dedupe via name-norm; Microsoft / MSFT collapse to one row
- GLEIF LEI
- No match
- SEC EDGAR CIK
- None — not an SEC registrant
- Domain
- None on record
- Corporate parent
- Onterris, Inc.— per SEC Exhibit 21 filing
Disclosure history (4)newest first
- FEDERALSEC 10-K Item 1Cas reporting2026-02-26
Montrose Environmental Group, Inc. filed its 10-K Item 1C disclosing no known cybersecurity threats as of December 31, 2025. The company describes its cybersecurity risk management program, governance structure, and incident response plan, noting no material incidents affecting business strategy or financial condition.
- 🦞Maine State AGas victim2022-09-06
Montrose Environmental Group, Inc. reported an external system breach (hacking) occurring between June 8 and June 11, 2022, discovered on August 4, 2022. The incident affected 269 individuals, including 1 Maine resident. Acquired data included names and financial account or credit/debit card numbers (with security codes/PINs). The company provided written notification and offered 12 months of credit monitoring and identity protection services via Experian.
- 🦬Montana State AGas victim2022-09-06
Montrose Environmental Group, Inc. reported a data breach to the Montana Attorney General. The breach was reported on 2022-09-06. The breach occurred from 6/8/2022 to 6/11/2022. 2 Montana residents were affected.
- GLOBALLeak Siteas victim2022-08-06