Topstep Brokerage
ent_a67da6a4365cfce9610f8a65
Disclosures
10
State AG · 5 jurisdictions
Multi-filing incidents
1
incidents joining 2+ filings here
Max affected reported
1,922
nationwide · State AG NH
Leak-site claims
0
none in sample
Identity resolution
- Canonical name
- Topstep Brokerage
- Normalized
- topstep brokerage— dedupe via name-norm; Microsoft / MSFT collapse to one row
- GLEIF LEI
- No match
- SEC EDGAR CIK
- None — not an SEC registrant
- Domain
- topstepbrokerage.com
Disclosure history (10)newest first
- Indiana State AGas victim2026-01-20
Topstep LLC reported a data breach to the Indiana Attorney General. The breach occurred on 2025-12-14 and was reported on 2026-01-20. 11 Indiana residents were affected. 938 individuals affected in total.
- Indiana State AGas victim2026-01-20
Topstep LLC reported a data breach to the Indiana Attorney General. The breach occurred on 2025-12-14 and was reported on 2026-01-20. 11 Indiana residents were affected. 938 individuals affected in total.
- Vermont State AGas victim2026-01-16
Account takeover noticeCustomers notified of unauthorized access to their accounts.
- Massachusetts State AGas victim2026-01-12
Topstep LLC notified Massachusetts residents of a cybersecurity incident involving high-volume traffic attacks blocked at the Web Application Firewall. The company forced password resets for affected accounts and is implementing mandatory multifactor authentication. Complimentary 24-month identity monitoring via Experian is being offered. No specific dates for discovery or occurrence were provided in the sample letter.
- New Hampshire State AGas victim2026-01-05
Account takeover noticeCustomers notified of unauthorized access to their accounts.
- Indiana State AGas victim2025-12-30
Topstep LLC reported a data breach to the Indiana Attorney General. The breach occurred on 2025-09-08 and was reported on 2025-12-30. 4 Indiana residents were affected. 520 individuals affected in total.
- Indiana State AGas victim2025-12-22
Topstep LLC reported a data breach to the Indiana Attorney General. The breach occurred on 2025-11-26 and was reported on 2025-12-22. 14 Indiana residents were affected. 1,920 individuals affected in total.
- New Hampshire State AGas victim2025-12-22
Account takeover noticeCustomers notified of unauthorized access to their accounts.
- Maine State AGas victim2025-12-22
Topstep LLC experienced a data breach due to an external system breach (hacking), affecting 1920 individuals, including 1 Maine resident.
- Indiana State AGas victim2025-12-20
Topstep LLC reported a data breach to the Indiana Attorney General. The breach occurred on 2025-11-21 and was reported on 2025-12-20. 1 Indiana residents were affected. 37 individuals affected in total.