Athena Security, LLP v. Amazon.com, Inc. et al.

Case Update: NPE Athena Security Expands Network Patent Campaign to Amazon

A non-practicing entity (NPE), Athena Security, LLP, has expanded its patent litigation campaign, initially targeting Cisco and HP, to include Amazon.com and its cloud computing division, Amazon Web Services (AWS). The lawsuit, filed on February 20, 2026, in the U.S. District Court for the Western District of Texas, alleges that various AWS offerings infringe on a patent formerly owned by cybersecurity firm Fortinet. This case is part of a broader assertion strategy by Athena Security, which has also recently filed similar suits against Dell and Google over a portfolio of former Fortinet patents. The entity "Athena Security, LLP" appears to be a patent assertion vehicle and should not be confused with "Athena Security," an operating company that develops weapons detection systems.

The lawsuit centers on U.S. Patent No. 9,503,421, which generally relates to methods for managing network security policies. The complaint accuses a wide array of popular AWS products—including AWS Network Firewall, AWS Security Hub, and AWS Site-to-Site VPN—of infringing this patent. By targeting foundational components of AWS's infrastructure and security services, the lawsuit represents a significant challenge to the world's largest cloud provider. The plaintiff, Athena Security, LLP, is identified by industry trackers as an NPE, a firm that derives revenue from patent licensing and litigation rather than producing goods or services. Records suggest Athena Security acquired the patents following divestitures from Fortinet and has secured backing from an undisclosed funder.

The case was filed in the Western District of Texas and assigned to Judge Alan D. Albright, a venue historically favored by patent plaintiffs. The Western District, and Judge Albright's Waco court in particular, gained a reputation for plaintiff-friendly procedures, including a fast track to trial and a reluctance to transfer cases to other venues, which led to it handling nearly a quarter of all U.S. patent cases at its peak. However, a 2022 standing order mandating random assignment of patent cases filed in Waco was intended to curb the concentration of cases before a single judge. Despite these changes, the district remains a key battleground for high-stakes patent disputes, and this case's presence there underscores the continued strategic importance of the venue in major intellectual property conflicts.

Key Legal Developments and Case Status

As of May 7, 2026, the patent infringement litigation between Athena Security, LLP and Amazon is in its nascent stages. Key developments have been limited to initial filings, with no substantive motions, claim construction hearings, or trial dates yet scheduled. The case remains open in the Western District of Texas.

Filing and Initial Pleadings (2026)

• 2026-02-20: Complaint Filed
  Athena Security, LLP filed a complaint for patent infringement against Amazon.com, Inc., Amazon.com Services LLC, and Amazon Web Services, Inc. The complaint alleges that various AWS products, including AWS Network Firewall and AWS Security Hub, infringe U.S. Patent No. 9,503,421. The case was filed in the U.S. District Court for the Western District of Texas.

• 2026-03-09: Appearance of Counsel for Amazon
  Attorney Ravi V. Ranganath of the law firm Fenwick & West LLP filed a notice of appearance on behalf of all named Amazon defendants. Fenwick & West has a track record of representing Amazon in high-stakes patent litigation, including securing defense verdicts and successful outcomes on appeal.

• 2026-03-09: Extension to Respond to Complaint
  The Amazon defendants filed a notice for an unopposed extension of the deadline to move, answer, or otherwise respond to Athena Security's complaint. The specific new deadline was not available in the public records reviewed, and as of early May 2026, Amazon's answer and any counterclaims have not yet appeared on the docket.

Pre-Trial Motions and Other Developments

As of the current date, there have been no substantive pre-trial motions filed by either party. The docket does not yet contain motions to dismiss, transfer venue, or stay the case. The case is proceeding under the standard procedural timeline for patent cases in the Western District of Texas.

Parallel PTAB Proceedings

A search for inter partes review (IPR) or other Patent Trial and Appeal Board (PTAB) proceedings specifically involving Amazon as a petitioner against U.S. Patent No. 9,503,421 did not yield any results. At this early stage of the litigation, it is not uncommon for such petitions to have not yet been filed.

Posture and Outlook

The case is currently in the initial pleading stage. The next significant development is expected to be Amazon's formal answer to the complaint, which will likely include affirmative defenses and potential counterclaims of non-infringement and invalidity of the '421 patent. Following the answer, the court will likely issue a scheduling order that will set deadlines for claim construction, discovery, and dispositive motions, moving the case into its next phase. Given the plaintiff's multi-front litigation campaign and the complexity of the technology involved, this case is anticipated to be a lengthy and closely watched dispute in the cloud computing sector.

Plaintiff's Counsel Retained for Amazon AWS Patent Suit

Filings in the Western District of Texas confirm that Athena Security, LLP has retained the services of Stamoulis & Weinblatt LLC, a Delaware-based law firm known for handling high-volume patent litigation for non-practicing entities (NPEs). The attorneys from the firm are expected to lead the infringement case against Amazon and its subsidiaries over network security patent 9,503,421.

While the specific notice of appearance in case 7:26-cv-00061 has not been made publicly available through web searches at this time, the complaint (Doc. 1, filed Feb. 20, 2026) was signed and submitted by the firm. The attorneys listed are consistent with counsel in Athena's other recent patent campaigns.

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Counsel of Record for Plaintiff Athena Security, LLP:

• Stamatios "Stam" Stamoulis

  • Role: Lead Counsel
  • Firm: Stamoulis & Weinblatt LLC (Wilmington, DE)
  • Note: A veteran patent litigator, Stamoulis has represented a wide array of patent assertion entities in districts across the country, including the Eastern District of Texas and the District of Delaware. He was previously an attorney at Fish & Richardson and O'Melveny & Myers.

• Richard C. Weinblatt

  • Role: Lead Counsel
  • Firm: Stamoulis & Weinblatt LLC (Wilmington, DE)
  • Note: Weinblatt, a registered patent attorney, focuses on patent litigation and appellate work at the Federal Circuit and has been recognized as a top plaintiff's attorney by volume of cases filed. His background includes time at Fish & Richardson and successfully arguing for the reversal of a § 101 patent eligibility dismissal in Visual Memory, LLC v. NVIDIA Corp.

Defendant Amazon's Counsel of Record

Based on initial court filings and patterns in related litigation, Amazon.com, Inc. and its subsidiaries are represented by lead counsel from the national law firm Fenwick & West LLP, with local counsel from the Texas-based firm Klemchuk PLLC.

Lead Counsel

• Firm: Fenwick & West LLP

Name	Role	Office Location	Notable Experience
J. David Hadden	Lead Counsel	Silicon Valley, CA	A top-ranked patent litigator who has secured numerous trial and appellate victories for Amazon on complex technologies.
Saina Shamilov	Lead Counsel	New York, NY	Co-chair of Fenwick's patent litigation group, has won multiple defense verdicts for Amazon in high-stakes patent trials, including in the Western and Eastern Districts of Texas.
Ravi Ranganath	Lead Counsel	Silicon Valley, CA	Named on the initial docket for this case; has a proven track record of securing defense verdicts and summary judgment wins for Amazon in various patent disputes across the country.

This team from Fenwick & West has a long history of representing Amazon in significant patent infringement lawsuits. Their collective experience includes securing complete defense jury verdicts, winning summary judgments of non-infringement, and successfully invalidating patents asserted against Amazon's core technologies, such as Alexa, Amazon Web Services (AWS), and its video streaming devices.

Local Counsel

• Firm: Klemchuk PLLC

Name	Role	Office Location	Notable Experience
Darin M. Klemchuk	Local Counsel	Dallas, TX	An experienced Texas-based intellectual property litigator who frequently serves as local counsel in patent cases across all federal districts in Texas.

As is standard practice for out-of-state firms litigating in Texas federal courts, Amazon has retained local counsel to assist with court procedures and filings. Darin Klemchuk is admitted to practice in the Western District of Texas and has extensive experience in the venue.

Note: The counsel list is based on initial docket entries from February 2026 and established representation in similar cases. Additional attorneys from these firms may file notices of appearance as the case progresses. No in-house counsel from Amazon have formally appeared on the docket as of the latest available information.