HFT Solutions LLC v. Optiver US LLC et al.

This patent infringement litigation, HFT Solutions LLC v. Optiver US LLC et al., involves HFT Solutions LLC, a wholly-owned subsidiary of publicly traded patent assertion entity (PAE) Network-1 Technologies, Inc. (NYSE:NTIP), asserting its "HFT Patent Portfolio" against Optiver US LLC and Optiver Trading US LLC. Optiver US LLC and Optiver Trading US LLC are global high-frequency trading (HFT) firms specializing in market making and proprietary trading across various asset classes, known for leveraging advanced technology and quantitative research in their operations. The lawsuit alleges that Optiver's high-frequency trading platforms, which utilize Field-Programmable Gate Arrays (FPGAs) for low-latency operations, infringe the asserted patents.

The case, filed on September 8, 2025, in the United States District Court for the Western District of Texas (Case No. 7:25-cv-00415), asserts U.S. Patent Nos. 10,931,286, 11,128,305, and 11,575,381. All three patents are titled "Field programmable gate array with external phase-locked loop" and generally describe an FPGA system designed to provide phase control with minimal latency by employing an external phase controller to synchronize receiver-side and transmitter-side clocks, thereby avoiding internal clock domain crossing circuits that introduce processing delays critical in high-speed applications like HFT. The Western District of Texas has historically been a popular venue for patent plaintiffs, particularly the Waco division under Judge Alan Albright, due to its patentee-friendly rules and efficient dockets. While a 2022 order changed patent case assignment to a random distribution across judges, cases related to existing portfolios or parties may still be assigned to a specific judge. A trial date has been scheduled for June 7, 2027.

This case is notable as part of HFT Solutions LLC's broader patent assertion campaign against the high-frequency trading industry, with the company actively litigating similar patents from its HFT Patent Portfolio against other major financial trading firms like Citadel Securities and Jump Trading in different districts. The patents-in-suit address technologies that provide "critical transaction latency gains" and "nanosecond speed" capabilities, which are paramount for competitive advantage in high-frequency trading, indicating the potential for significant industry impact. The HFT Patent Portfolio comprises eleven issued U.S. patents and two pending applications, with patent terms expected to extend until 2040, suggesting a long-term strategy for intellectual property monetization.

HFT Solutions LLC initiated patent infringement litigation against Optiver US LLC and Optiver Trading US LLC on September 8, 2025, in the U.S. District Court for the Western District of Texas. The case, 7:25-cv-00415, alleges infringement of U.S. Patent Nos. 10,931,286, 11,128,305, and 11,575,381, all related to high-frequency trading platforms utilizing Field-Programmable Gate Arrays (FPGAs) to reduce processing latency. The patents broadly relate to FPGA systems with external phase-locked loops for phase control and minimal latency.

Here's a chronological overview of the key legal developments:

• Filing & Initial Pleadings:

  • 2025-09-08: HFT Solutions LLC filed the complaint against Optiver US LLC and Optiver Trading US LLC, alleging infringement of three patents. The complaint claims Optiver's high-frequency trading platforms infringe the patents by using FPGAs to achieve low-latency trade execution.
  • Specific dates for Optiver's answer or counterclaims in this particular case are not explicitly available in the provided sources, though activity suggests pleadings have advanced beyond the initial complaint.

• Pre-Trial Motions of Substance:

  • 2026-02-10 (approx.): HFT Solutions LLC filed an unopposed motion for an extension of time for the parties' claim construction briefing.
  • By 2026-04-06 (approx.): The court reviewed a Joint Status Report where parties indicated claim construction briefing was underway and suggested a date for a Markman hearing. The parties were directed to file a further joint status report by April 6, 2026, updating the court on discovery and settlement interest.

• Claim Construction (Markman) Outcomes:

  • As of May 29, 2026, claim construction briefing is underway in the case. No Markman hearing has been held or an outcome rendered yet in this specific case. For a related case, HFT Solutions LLC v. Citadel Securities LLC (1:24-cv-13213 N.D. Illinois), claim construction deadlines were set, including an opening brief due by May 13, 2026, responsive brief by June 17, 2026, reply brief by July 1, 2026, and a joint chart by July 8, 2026. These dates suggest a similar, ongoing phase of litigation for the Optiver case.

• Discovery Milestones:

  • The parties' Joint Status Report indicated that discovery is in progress, with updates on its status to be provided to the court. For the related Citadel Securities case, fact discovery was scheduled to close by October 28, 2026.

• Trial Events, Verdict, and Post-Trial Motions:

  • The case is currently active and in the pre-trial phase (discovery and claim construction). No trial events, verdict, or post-trial motions have occurred.

• Settlement, Dismissal, Judgment, or Appeal:

  • The case remains active. The parties have reported to the court on their interest in settlement discussions, but no settlement, dismissal, or judgment has been reached.

• Parallel PTAB IPR/PGR Proceedings:

  • Several Inter Partes Review (IPR) petitions have been filed against the asserted patents by another defendant in a related litigation, Citadel Securities LLC:
    • 2025-12-03: IPR2026-00151 was filed against U.S. Patent No. 11,575,381 B1.
    • 2026-01-09: IPR2026-00212 was filed against U.S. Patent No. 10,931,286 B1.
  • The third patent in suit, US 11,128,305 B1, also has related IPRs that are not explicitly detailed in the provided search results. The institution decisions for IPR2026-00151 and IPR2026-00212 were not available in the provided information as of the current date. The USPTO's Patent Trial and Appeal Board (PTAB) institution rates for IPRs and PGRs have seen a downward trend in fiscal year 2026, standing at 37% year-to-date through February 2026. Recent USPTO policy changes by Director John A. Squires, particularly from March 2025 and October 2025, and a new memorandum on March 11, 2026, have introduced additional discretionary factors for institution decisions, focusing on domestic manufacturing, investment, and small business use of AIA proceedings, and requiring identification of all real parties in interest.

Plaintiff HFT Solutions LLC is represented by counsel from Russ August & Kabat.

Here are the identified attorneys:

• Peter Tong

  • Role: Counsel, likely local counsel (heads the firm's Texas office with an emphasis on Western District of Texas matters).
  • Firm: Russ August & Kabat, Dallas, Texas.
  • Experience: Partner specializing in intellectual property litigation in the Western District of Texas; previously served as a law clerk to Judge Alan D. Albright. He has represented companies in numerous patent lawsuits, secured jury verdicts, and handled Inter Partes Review (IPR) proceedings.

• James N. Pickens

  • Role: Counsel
  • Firm: Russ August & Kabat, Los Angeles, California (firm's main office).
  • Experience: Partner in the patent litigation group, with strong trial advocacy skills. He has assisted in obtaining jury verdicts for patent infringement in the U.S. District Court for the Western District of Texas and the Eastern District of Texas.

• Philip Wang

  • Role: Counsel
  • Firm: Russ August & Kabat, Los Angeles, California (firm's main office).
  • Experience: Partner practicing in intellectual property and litigation departments, specializing in patent litigation and PTAB proceedings with a focus on high-technology. He has trial experience before district courts, the International Trade Commission, and the Patent Office.

• James S. Tsuei

  • Role: Counsel
  • Firm: Russ August & Kabat, Los Angeles, California (firm's main office).
  • Experience: Partner specializing in intellectual property litigation, representing clients in patent litigation, trade secret matters, and complex business disputes across a wide range of technologies. He has significant litigation experience in federal and state courts, and before the Patent Trial and Appeal Board.

• Minna Y. Jay

  • Role: Counsel
  • Firm: Russ August & Kabat, Los Angeles, California (firm's main office).
  • Experience: Partner representing clients in high-stakes patent litigation with significant experience in all phases of litigation before federal district courts, the ITC, and the PTAB, achieving favorable settlement and trial outcomes across various technologies.

• Susan Y. Tull

  • Role: Counsel
  • Firm: Russ August & Kabat, Washington D.C. (firm has multiple offices).
  • Experience: Seasoned intellectual property trial lawyer, experienced in complex patent and trade secret disputes across various industries. She has successfully tried cases in U.S. district courts, the ITC, and the Federal Circuit, and has experience defending against patent infringement actions in the Western District of Texas.

The initial complaint analysis from September 8, 2025, identified Russ August & Kabat as Plaintiff's Counsel. [cite: 10 in previous turn for case 7:25-cv-00415] The firm has also opened a Texas office headed by Peter Tong, specifically targeting patent litigation in the Western District of Texas.

I have repeatedly searched for the counsel of record for Optiver US LLC and Optiver Trading US LLC in case 7:25-cv-00415, but the public search results (snippets) have not yielded direct attorney names or their firms for the defendants in this specific case.

While I found a "Notice of Attorney Appearance" in one snippet [3, previous step], the snippet itself did not provide the attorney's name or firm, and subsequent searches to identify who made that appearance for Optiver were unsuccessful within the given constraints. I also confirmed that Susan Yates Tull, initially a potential lead, is counsel for the plaintiff, not the defendant.

Without direct access to PACER or a more comprehensive legal database that provides full docket entries, I cannot definitively identify the counsel of record for the defendants in this active case.

Therefore, I must state that the information isn't readily available through web search snippets.

Conclusion:

The counsel of record representing the defendant(s), Optiver US LLC and Optiver Trading US LLC, in HFT Solutions LLC v. Optiver US LLC et al. (7:25-cv-00415) cannot be definitively identified from the available web search results. While docket entries indicate appearances by counsel for Optiver, the names of the attorneys and their affiliated firms are not explicitly stated in the provided snippets.