Qomplx LLC v. Palo Alto Networks, Inc.

Case Overview and Background

This patent infringement lawsuit was initiated by Qomplx LLC, a cybersecurity and risk analytics operating company based in Tysons, Virginia, against Palo Alto Networks, Inc., a global leader in cybersecurity solutions. Filed on August 28, 2025, the case alleges that the defendant's products infringe on multiple patents held by the plaintiff. The lawsuit is part of a broader litigation campaign by Qomplx, which has filed a similar suit against Microsoft in the Western District of Texas asserting a partially overlapping set of patents, indicating a strategic effort to enforce its intellectual property against major players in the cloud data and cybersecurity sectors.

While the case metadata identifies U.S. Patent No. 12,301,628 as the single patent at issue, the public docket for this case explicitly lists four different patents attached to the complaint: U.S. Patent Nos. 12,143,424; 12,143,425; 12,301,627; and 11,539,663. This discrepancy is notable. A technical analysis from Qomplx's parallel litigation against Microsoft describes the related '627 and '628 patents as covering systems that use directed graphs to represent networks, analyze streaming data to identify anomalies, and map out potential cyberattack paths. The '663 patent is described as a system using a "midserver" to aggregate data from many devices into a single secure stream for cloud services. Given the technology described in the patents, the accused products are likely part of Palo Alto Networks' AI-driven security operations (SOC) platform, such as the Cortex XSIAM (extended security intelligence and automation management) platform, which performs large-scale data ingestion and analysis to detect and respond to threats.

The case is filed in the U.S. District Court for the Eastern District of Texas and has been assigned to Chief Judge Rodney Gilstrap, statistically the busiest patent judge in the United States. This venue is highly significant; the Eastern District of Texas has a long-standing reputation as a plaintiff-friendly jurisdiction for patent cases, known for its experienced judiciary and local rules that can favor patent holders. The selection of this court and judge, combined with Qomplx's status as an operating company asserting its own patents against a major market competitor, makes this case particularly noteworthy. The outcome could have a significant impact on the competitive landscape for advanced, AI-driven cybersecurity platforms.

Key Legal Developments and Case Status

As of April 30, 2026, Qomplx LLC v. Palo Alto Networks, Inc. remains an active and contested patent infringement litigation in the U.S. District Court for the Eastern District of Texas. The case is progressing through pre-trial proceedings before Chief Judge Rodney Gilstrap, with significant dates for claim construction and trial scheduled for 2027. The litigation is running in parallel with inter partes review (IPR) proceedings at the Patent Trial and Appeal Board (PTAB) initiated by a third party, Microsoft, which could significantly impact this case.

Filing and Initial Pleadings

• 2025-08-28: Qomplx LLC filed its complaint for patent infringement, asserting U.S. Patent No. 12,301,628. Despite the case metadata listing a single patent, the complaint itself and docket reports indicate that four patents are at issue: U.S. Patent Nos. 12,143,424; 12,143,425; 12,301,627; and 11,539,663. Qomplx demanded a jury trial.
• 2025-09-03: Palo Alto Networks was formally served with the summons.
• 2025-11-07: After securing an extension, Palo Alto Networks filed its Answer to the complaint. In this key pleading, the defendant denied the core allegations of infringement and asserted that Qomplx's patents are invalid. The Answer also included counterclaims, asking the court for a declaratory judgment of non-infringement and invalidity for each of the four asserted patents. This filing formally placed the validity of the patents in dispute within the district court litigation.

Substantive Pre-Trial Motions

• 2025-11-07: Concurrent with its Answer, Palo Alto Networks filed a Motion to Dismiss for Failure to State a Claim under Federal Rule of Civil Procedure 12(b)(6) (Docket No. 11). The motion argued that Qomplx’s complaint failed to meet the pleading standards for patent infringement because it did not plausibly allege how Palo Alto Networks' accused products (like the Cortex XSIAM platform) met specific limitations of the patent claims.
• 2025-12-02: Qomplx filed its response in opposition to the motion to dismiss.
• 2025-12-16: Palo Alto Networks filed its reply brief in support of its motion.
• 2025-12-23: Qomplx filed a sur-reply.
• 2026-01-28: Judge Gilstrap denied Palo Alto Networks’ Motion to Dismiss. In a text order, the court found that Qomplx's allegations were sufficient to provide the defendant with fair notice of the infringement claims and that the complaint plausibly stated a claim for relief, allowing the case to proceed into discovery. This was a significant early victory for Qomplx, ensuring the case would not be terminated on pleading deficiencies.

Scheduling and Discovery

• 2025-12-10: While the motion to dismiss was pending, the court entered a comprehensive Docket Control Order (Docket No. 33), setting the full schedule for the case. This order established the timeline for discovery, claim construction, and dispositive motions, signaling the court's intent to move the case forward efficiently.
• 2025-12-17: The parties agreed to and the court entered a Protective Order (Docket No. 40) to govern the handling of confidential information during discovery.
• 2026-01-05: An Amended Docket Control Order (Docket No. 43) was entered, making minor adjustments to the case schedule.

Parallel PTAB Proceedings and Motion to Stay

A major development in the case is the initiation of IPRs challenging the validity of the asserted patents.

• 2026-01-14 to 2026-04-07: Microsoft Corporation, which is a defendant in a parallel lawsuit filed by Qomplx in the Western District of Texas, filed three IPR petitions with the PTAB challenging the patentability of claims of the '663, '424, and '627 patents—three of the four patents at issue in the Palo Alto case.
  • IPR2026-00183 (for U.S. Patent No. 11,539,663)
  • IPR2026-00298 (for U.S. Patent No. 12,143,424)
  • IPR2026-00325 (for U.S. Patent No. 12,301,627)
• 2026-04-20: Citing the significant overlap in patents and invalidity arguments, Palo Alto Networks filed a Motion to Stay the district court case pending the PTAB's decision on whether to institute the IPRs filed by Microsoft. Palo Alto argued that a stay would conserve judicial and party resources and simplify the issues, as a PTAB finding of unpatentability could render a significant portion of the district court case moot.
• Present Posture: As of April 30, 2026, briefing on the Motion to Stay is underway, and Qomplx is expected to file its opposition shortly. Judge Gilstrap's decision on this motion will be a critical inflection point. A stay would pause the district court proceedings for over a year, while a denial would mean the litigation and the IPR processes would proceed simultaneously on parallel tracks.

Future Outlook and Key Upcoming Dates

The case is currently in the discovery phase and is defined by the pending motion to stay. The next significant events according to the court's schedule are:

• Claim Construction (Markman) Hearing: Scheduled for 2027-02-01. This will be a pivotal hearing where Judge Gilstrap will determine the legal meaning of disputed terms in the patent claims, which will in turn define the scope of the patents for infringement and validity purposes.
• Pretrial Conference: Set for 2027-07-12.
• Jury Selection and Trial: Scheduled to begin on 2027-08-16.

The case has not reached summary judgment, trial, or a final disposition. Its immediate future hinges on the outcome of the motion to stay and the PTAB's institution decisions on the parallel IPRs.

Plaintiff's Counsel of Record

Based on a review of the docket for Qomplx LLC v. Palo Alto Networks, Inc., 2:25-cv-00913 (E.D. Tex.), the following attorneys have appeared on behalf of Plaintiff Qomplx LLC.

Lead Counsel

• Name: Reza Mirzaie

• Role: Lead Attorney

• Firm: Russ August & Kabat (Los Angeles, CA)

• Note: Mirzaie has a background in electrical engineering and has represented clients in high-stakes patent litigation involving complex technologies, including matters for the University of California and ParkerVision.

• Name: Marc A. Fenster

• Role: Lead Attorney

• Firm: Russ August & Kabat (Los Angeles, CA)

• Note: A founding partner of the firm, Fenster is a nationally recognized trial lawyer who has secured jury verdicts and settlements worth hundreds of millions of dollars in major patent cases.

• Name: Adam S. Hoffman

• Role: Lead Attorney

• Firm: Russ August & Kabat (Los Angeles, CA)

• Note: Hoffman's practice focuses on patent infringement litigation, and he was part of the team that represented plaintiff SSL Services against Citrix, resulting in a $10 million jury verdict.

Local Counsel

• Name: S. Calvin Capshaw

• Role: Local Counsel

• Firm: Capshaw DeRieux LLP (Gladewater, TX)

• Note: Capshaw is a veteran East Texas trial lawyer who frequently serves as local counsel in patent cases and has represented clients in over 100 trials.

• Name: Elizabeth L. DeRieux

• Role: Local Counsel

• Firm: Capshaw DeRieux LLP (Gladewater, TX)

• Note: DeRieux is an experienced litigator who regularly serves as local counsel for parties in the Eastern District of Texas and has been recognized as a Texas Super Lawyer.

Counsel of Record for Defendant Palo Alto Networks, Inc.

As of May 5, 2026, Palo Alto Networks, Inc. is represented by a team of attorneys from Paul, Weiss, Rifkind, Wharton & Garrison LLP, serving as lead counsel, and Gillam & Smith LLP, serving as local counsel in the Eastern District of Texas. The following attorneys have formally appeared on the docket.

Lead Counsel

• Name & Role: Steven C. Baughman, Lead Counsel

  • Firm: Paul, Weiss, Rifkind, Wharton & Garrison LLP (Washington, D.C.)
  • Note on Experience: Baughman is a seasoned patent litigator known for representing major technology companies in high-stakes disputes, including cases before district courts, the ITC, and the PTAB.

• Name & Role: Jonathan M. Gaskin, Of Counsel

  • Firm: Paul, Weiss, Rifkind, Wharton & Garrison LLP (Washington, D.C.)
  • Note on Experience: Gaskin has significant experience in patent litigation involving complex technologies such as software, networking, and telecommunications for clients like Intel and Amgen.

• Name & Role: Michael D. Mizanin, Of Counsel

  • Firm: Paul, Weiss, Rifkind, Wharton & Garrison LLP (Washington, D.C.)
  • Note on Experience: Mizanin specializes in patent litigation and has represented clients in matters involving diverse technologies, including cybersecurity and software systems.

Local Counsel

• Name & Role: Melissa R. Smith, Local Counsel
  • Firm: Gillam & Smith LLP (Marshall, Texas)
  • Note on Experience: Smith is a highly experienced and well-regarded local counsel in the Eastern District of Texas, having appeared in hundreds of patent cases and served on the court's Local Rules Advisory Committee.