In Re Mosaic LLM Litigation
- Charles Breyer
- 3:24-cv-01451
- U.S. District Court · Northern District of California
- 4
In Re Mosaic LLM Litigation: Magistrate Judge Cisneros ordered Databricks CEO Ali Ghodsi added as a document custodian in discovery.
The ruling affects Plaintiffs, Defendants, Databricks, and Dr. Ali Ghodsi. Ghodsi must be treated as one of the document custodians for the discovery process, subject to the parties’ electronic-discovery protocol.
What happened
In Re Mosaic LLM Litigation concerns Plaintiffs’ request to designate Databricks CEO Dr. Ali Ghodsi as a document custodian. Plaintiffs said his leadership and role in Databricks’ acquisition of MosaicML gave him relevant information about the alleged infringement and the companies’ relationship.
Defendants objected under the rule limiting discovery from high-level executives, arguing that Plaintiffs were speculating that Ghodsi had unique documents. The court considered his role in the acquisition, his possible access to strategic-level information, the possible overlap with other custodians’ files, and the absence of any claim that searching his files would be unusually burdensome.
Magistrate Judge Liga M. Cisneros granted Plaintiffs’ request and designated Ghodsi as a document custodian. The order did not decide the underlying infringement claims.
The detailed version
- In Re Mosaic LLM Litigation · No. 3:24-cv-01451
- Charles Breyer
- June 26, 2025
Background
The court resolved the parties’ joint discovery letter concerning whether Dr. Ali Ghodsi, Databricks’ CEO, could be designated as a document custodian. The parties’ electronic-discovery protocol allowed Plaintiffs to select three additional custodians after Defendants selected the first ten, subject to objections based only on “Apex considerations.”
Plaintiffs argued that Ghodsi was uniquely positioned to have relevant information because of his leadership role and involvement in Databricks’ acquisition of MosaicML. Plaintiffs relied in part on an interview in which Ghodsi discussed meeting MosaicML’s CEO, deciding to pursue the acquisition, and the value of MosaicML’s generative artificial-intelligence models.
Court’s Analysis
The court explained that the apex doctrine recognizes the burden that discovery involving high-level corporate executives can impose. In this dispute, the court considered the executive’s access to relevant information, whether the information was unique, and the burden of producing the information.
The court found it credible that Ghodsi would have documents about Databricks’ acquisition of MosaicML. Those documents could be relevant to Databricks’ knowledge of Mosaic’s alleged infringing activity and to the financial benefit Databricks believed it could obtain from that activity. The court also found it highly plausible, though somewhat more speculative, that Ghodsi had information about Databricks’ and MosaicML’s post-acquisition relationship.
The court rejected Defendants’ argument that Ghodsi should not be designated because his documents might overlap with documents held by other custodians, including former MosaicML CEO Dr. Rao. It noted that Ghodsi’s leadership role differed from that of most other agreed-upon custodians, who were members or directors of MosaicML’s research and engineering teams. Ghodsi might have unique information about strategic-level large-language-model development and commercialization, including communications with Databricks’ board and investors.
Defendants did not argue that producing Ghodsi’s custodial file would be unduly burdensome. Because the parties had agreed to identify up to thirteen custodians, and no unique burden was shown, the court found no reason to exclude Ghodsi on burden grounds.
Disposition
Magistrate Judge Liga M. Cisneros granted Plaintiffs’ request to designate Ghodsi as a document custodian. This was a discovery ruling and did not resolve the parties’ underlying claims, including the alleged infringement claims.
Read the full 4-page opinion on CourtListener, the free public archive maintained by the Free Law Project.