Citadel Securities LLC vs. HFT Solutions, LLC

Explore the PTAB proceeding IPR2026-00212 filed by Citadel Securities LLC on 2026-01-09. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2026-00212

Filing Date

2026-01-09

Accorded Filing Date

2026-01-09

Institution Decision Date

2026-06-02

Last Modified Date

2026-07-03

Proceeding Type

IPR

Termination Date

2026-06-02

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Citadel Securities LLC

Represented By

Fasulo, Meg

Patent Owner / Respondent

HFT Solutions, LLC

Represented By

Chang, Daleet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 2800 - Semiconductors, Electrical & Optical Systems

Patent Information

1 Patent Involved

Respondent Application Number 16937314

Respondent Patent Number 10931286

External Links

Espacenet

Google Patents

Respondent Inventor Nima Badizadegan

Respondent Tech Center TC 2800 - Semiconductors, Electrical & Optical Systems

Address and Attorney/Agent Information

23 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name AMSTER, ROTHSTEIN & EBENSTEIN LLP

Customer Number 1912

Address 405 LEXINGTON AVENUE, FLOOR 48, NEW YORK, NY, 10174, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
22031	Christopher Dunham	212-278-0400
24490	Jeffrey Schwab	212-885-9215
25871	Philip Gottfried	212-336-8000
27476	Neil Zipkin	212-336-8120
28678	John White	212-336-8193
29403	Anthony Lo Cicero	212-697-5995
30259	Kenneth George	212-336-8090
31643	Douglas Miro	212-336-8000
32781	Charles Macedo	212-336-8000
38557	Marion Metelski	212-336-8077
39992	Gary Gershik	212-336-8000
40837	Paul Teng	516-424-5401
41834	Steven Hertzberg	212-336-8060
42889	Alan Miller	212-336-8000
45343	Brian Comack	212-336-8000
46494	Benjamin Halpern	212-336-8095
51431	Keith Barkaus	212-382--0700
63679	Brian Amos	212-336-8123
69386	Hajime Sakai	212-336-8124
80964	Darren Haber	212-336-8192
81259	Thomas Hart	212-336-8000
81535	Andrew Gorman	212-336-8186
81796	Adam Kravitz	949-292-4912

Proceeding Documents

Director Discretionary Decision: Deny RESPONSE

2026-06-02 FILING PARTY: BOARD

Download

2021

Exhibit 2021 - Declaration of Dale Chang Exhibit

2026-04-15 FILING PARTY: PATENT OWNER

Download

PATENT OWNER'S PRELIMINARY RESPONSE POPR

2026-04-15 FILING PARTY: PATENT OWNER

Download

2022

Exhibit 2022 - Internet Archive Redirect Failure Exhibit

2026-04-15 FILING PARTY: PATENT OWNER

Download

1057

How to Counter BRICS and Preserve Global Dollar Dominance (Hudson Institute) Exhibit

2026-04-10 FILING PARTY: PETITIONER

Download

Citadel Securities LLC vs. HFT Solutions, LLC

Proceeding Overview

Parties & Counsel

Petitioner

Citadel Securities LLC

Represented By

Patent Owner / Respondent

HFT Solutions, LLC

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Director Discretionary Decision: Deny RESPONSE

Exhibit 2021 - Declaration of Dale Chang Exhibit

PATENT OWNER'S PRELIMINARY RESPONSE POPR

Exhibit 2022 - Internet Archive Redirect Failure Exhibit

How to Counter BRICS and Preserve Global Dollar Dominance (Hudson Institute) Exhibit

HFT v Citadel Securities DI 52 Exhibit

Letter from Kelson to Chang Exhibit

Docket Navigator Analytics (Motion Success by Year, National) Exhibit

Citadel Advisors LLC Brochure Exhibit

HFT v Citadel Securities DI 46 Exhibit

Patent Law 101 (M. Sipe) Exhibit

NDIL Local Patent Rules Exhibit

HFT v Citadel Securities DI 66 Exhibit

IPR2026-00151, Paper 10 Exhibit

Citadel Repsonse to HFT First Set of RFPs (excerpt) Exhibit

AMD CEO says U.S.-made TSMC chips are more expensive but worth it (Tom's Hardware) Exhibit

HFT v Citadel Securities DI 34 Exhibit

Lex Machina Patent Litigation Report (June 2025) Exhibit

Email from Kelson to HFT Counsel (March 3, 2026) Exhibit

HFT v Citadel Securities DI 70 Exhibit

Petitioner's Response in Opposition to Patent Owner's Request for Discretionary Denial of Institution RESPONSE

HFT v. Jump Trading, DI 59 Exhibit

IPR2026-00151 Paper 6 Exhibit

U.S. Patent No. 10,826,502 Exhibit

Email from Kelson to Counsel (Feb. 23, 2026) Exhibit

NDIL Default Protective Order (Patent Cases) Exhibit

Citadel Securities Initial Disclosures (HFT v Citadel Securities) Exhibit

HFT v Jump Trading DI 30-1 Exhibit

HFT Initial Disclosures (HFT v Citadel Securities) Exhibit

Email from Tull to Counsel (March 19, 2026) Exhibit

HFT v Jump Trading DI 42 Exhibit

IPR2026-00151 Paper 11 Exhibit

Docket Navigator Analytics (Time to Trial, ND IL) Exhibit

Petitioner's Stipulation NOTICE

Exhibit 2013 - HFT Solutions, LLC v. Citadel Securities LLC - Complaint Exhibit

Exhibit 2012 - HFT Solutions, LLC v Optiver US LLC et al - Preliminary Invalidity Contentions Exhibit

Exhibit 2002 - HFT Solutions, LLC v Optiver US LLC et al - Scheduling Order Exhibit

Exhibit 2014 - A-UL3422-p16G-PQ-G Avnet Listing Exhibit

Exhibit 2006 - HFT Solutions, LLC v. Citadel Securities LLC - Agreed Schedule Exhibit

Exhibit 2019 - Zynq UltraScale+ MP SOC Family Avnet Listing Exhibit

Exhibit 2001 - HFT Solutions, LLC v. Jump Trading LLC - Agreed Schedule Exhibit

Exhibit 2004 - HFT Solutions, LLC v. Citadel Securities LLC - Order Denying Motion to Dismiss Exhibit

Exhibit 2009 - U.S. Patent No. 10,931,286 Exhibit

Exhibit 2003 - HFT Solutions, LLC v. Citadel Securities LLC - Motion to Dismiss Exhibit

Exhibit 2017 - AMD Alveo UL3524 Accelerator Card Datasheet Exhibit

Exhibit 2018 - AMD Alveo UL 3422 FPGA Accelerator Card Datasheet Exhibit

Exhibit 2010 - Counsel emails re Citadel’s Request for Production of Documents, including source code Exhibit

Exhibit 2020 - Citadel Securities LLC 2024 Financial Statement Exhibit

Exhibit 2015 - A-MA35D-P16G-PQ-G Mouser Listing Exhibit

Exhibit 2008 - HFT Solutions, LLC v. Citadel Securities LLC - Citadel Securities Answer, Affirmative Defenses, and Counterclaims Exhibit

Exhibit 2005 - HFT Solutions, LLC v. Citadel Securities LLC - Final Invalidity Contentions Exhibit

PATENT OWNER’S REQUEST FOR DISCRETIONARY DENIAL OF INSTITUTION RESPONSE

Exhibit 2007 - HFT Solutions, LLC v. Citadel Securities LLC - Final Invalidity Contentions Exhibit B-1 Exhibit

Exhibit 2016 - BittWare XUP-VV8 Datasheet Exhibit

PATENT OWNER'S UPDATED MANDATORY NOTICES NOTICE

PATENT OWNER'S UPDATED POWER OF ATTORNEY NOTICE

Order Granting Petitioner’s Motion for Admission Pro Hac Vice of Matthew R. Ford ORDER

Petitioner's Motion for Pro Hac Vice Admission of Matthew R. Ford Under 37 C.F.R. 42.10(c) MOTION

Notice: NOTICE OF FILING DATE ACCORDED TO PETITION AND TIME FOR FILING PATENT OWNER PRELIMINARY RESPONSE NOTICE

Notice: Power of Attorney NOTICE

Notice: Mandatory Notice NOTICE

File History (U.S. Patent No. 10,931,286) Exhibit

Interactive Brokers Founder Changed Trading Forever (Barrons) Exhibit

Affidavit of Mina Chung (Altera) Exhibit

A. Frank D'Souza, Design of Control Systems Exhibit