Halle L. Dimar
Armstrong Teasdale
- Address of record
- 7700 Forsyth Blvd, Suite 1800, St. Louis, MO 63105, 314-621-5070
- hdimar@atllp.com
- Phone
- (314) 621-5070
Contact details as filed with the court in the cases below.
Case history
Publicly tracked matters where this attorney is listed as counsel.
Ascension Health December 2024 Data Breach Class Action
A proposed class action alleges that Ascension Health experienced a data breach in December 2024 affecting personal information of patients or account holders. The lawsuit apparently concerns claims arising from the unauthorized access or exposure of sensitive data and the resulting harm to class members.
- Filed
- December 23, 2025
- Represents
- Ascension Health
MOVEit Customer Data Security Breach Settlement
Cadence Bank used a third-party file transfer application called MOVEit Transfer that had a security vulnerability. This vulnerability led to a data breach between May 28, 2023 and May 31, 2023, where personally identifying information of customers was compromised. Cadence began notifying affected individuals in September 2023.
- Claim deadline
- June 4, 2026
- Represents
- Ascension Health
MOVEit Nuance Data Security Breach Settlement
Nuance Communications, Inc. experienced a data security breach between May 27-31, 2023, affecting personally identifiable information of customers. The breach resulted from an alleged vulnerability in MOVEit Transfer, third-party file transfer software that Nuance used in its ordinary business operations. Nuance is settling claims related to this 2023 MOVEit Security Incident, though litigation against Progress Software Corporation (the MOVEit software licensor) continues.
- Claim deadline
- March 30, 2026
- Represents
- Ascension Health
“Recovery” and “exposure” refer to total disclosed settlement funds in associated cases, not money personally won or lost by an attorney. Settlements generally resolve disputed allegations without a finding that either side won. Data comes from public court dockets and may be incomplete.