CoStar Group, Inc., et al.
IN RE: CoStar Group, Inc., et al., Antitrust Litigation was centralized in the Eastern District of Virginia on 2026-08-11, making it the most recently formed docket among the currently pending antitrust MDLs as of the JPML's September 2026 report. With only 3 pending actions, the matter is in its opening days as a consolidated proceeding, and no meaningful procedural history — motion practice, market-definition rulings, or case-management structure — has yet developed.
At this earliest possible phase, duration and resolution risk cannot be meaningfully assessed beyond the general observation that apply to any newly centralized matter: initial case-management conferences, responses to the complaint, and early coordination among the parties typically precede any substantive ruling by several months at minimum, and whether additional related actions are filed and consolidated into this docket will itself shape how the litigation develops.
For anyone tracking the earliest stage of the MDL lifecycle, this docket is a clean example of what a matter looks like at the moment of centralization, before any of the structural signals — class certification posture, market-definition rulings, bellwether sequencing — that typically inform duration assessments have emerged. Criterica Intelligence's platform tracks every active MDL from this earliest point forward, and this docket's entry will be updated as its own procedural record develops.
Very new — it was centralized on 2026-08-11, just weeks before the JPML's September 2026 pending-dockets report, making it the most recently formed docket among the currently active antitrust MDLs.
Very little beyond the centralization facts themselves. No motion practice, market-definition ruling, or case-management structure has yet developed, since the docket has existed as a consolidated proceeding for only a few weeks.
Initial case-management conferences, responses to the complaint, and coordination among the parties on how discovery will proceed — the foundational steps that precede any substantive ruling on the merits.
As the docket develops its own procedural record over the coming months — through motion practice, market-definition rulings, and case-management orders — the structural signals needed to assess duration and resolution path will emerge.
Statistics shown reflect historical or illustrative model outputs derived from real case data. They are not predictions or guarantees of any individual outcome. Litigation results depend on facts, jurisdiction, judge, and counsel, and vary case by case. Model accuracy is subject to selection effects and changing legal dynamics.