---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-276827"
form_type: "8-K"
ticker: "MMI"
cik: "0001578732"
company_name: "Marcus & Millichap, Inc."
filed_at: "2021-09-20T23:59:59+00:00"
generated_at: "2026-06-29T02:38:54.447576+00:00"
event_type: "cyber"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Marcus & Millichap discloses cybersecurity attack; systems restored with no material disruption

## Summary
- Cybersecurity attack on IT systems identified; external experts engaged immediately.
- Systems restored with no material disruption to business; investigation ongoing.
- No evidence of material risk or misuse of personal information to date.
- Company expects cyber insurance to cover majority of incident costs.

## SEC filing metadata
- accession: 0001193125-21-276827
- form_type: 8-K
- ticker: MMI
- cik: 0001578732
- company_name: Marcus & Millichap, Inc.
- filed_at: 2021-09-20T23:59:59+00:00
- event_type: cyber
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1578732/000119312521276827/0001193125-21-276827-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1578732/000119312521276827/d231857d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-276827
- JSON: https://secwatch.observer/filing/0001193125-21-276827.json
- Plain text: https://secwatch.observer/filing/0001193125-21-276827.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.