CASE STUDY

High-Speed, High-Stakes Premerger Notification HSR Collection

Sandline was engaged by a prominent AM Law 100 firm’s Southwest office to support a high-priority matter under the new premerger notification filing requirements of the Hart-Scott-Rodino (HSR) Act. These fast-paced engagements focus on defensible, targeted data collections—primarily mailbox and file share data—for antitrust premerger review. This was the first in a series of HSR-related matters Sandline has supported, setting a strong precedent for future engagements with both the firm and their corporate clients.
7
Data collected from seven custodians
21
Twenty-one different collections performed
195 GB
Total date across email, Teams and OneDrive

Challenges

  • The legal team needed a reliable partner to:
  • Quickly assess and scope the data landscape
  • Upgrade Microsoft 365 licenses for seven targeted custodians
  • Collect critical data, including:
  • Email and Microsoft Teams content (including modern attachments)
  • Custodian OneDrive accounts

The timeline was non-negotiable, with only four days to complete the full scope of work from consultation through collection and delivery.

Expertise

Led by Sandline’s Forensics team, the project unfolded in close collaboration with the AM Law 100 attorneys and their corporate client. Our approach prioritized speed, precision, and real-time communication.

  • Hosted internal and external scoping calls to clarify requirements
  • Provided advisory support for upgrading M365 licenses to enable targeted collections
  • Executed 21 separate collections across seven custodians
  • Delivered rolling productions via KiteWorks to keep downstream review moving
  • Maintained ongoing communication with the law firm team through morning, afternoon, and evening updates
  • Compiled detailed documentation of each collection for defensibility

Results

  • Total Data Collected: 195 GB across email, Teams, and OneDrive
  • Turnaround Time: Initiated on Wednesday; final deliverable sent Saturday less than 4 days later.
  • Post-Engagement Collaboration: Secondary consulting with the AM Law 100 team on workflows for handling modern attachments in Microsoft Teams

Why it Matters

This successful outcome not only met tight regulatory and client deadlines but also established a collaborative rhythm with the AM Law 100 team that continues today. As HSR matters grow in frequency and complexity, Sandline remains a trusted partner for forensic collection and advisory support under urgent timelines.