Company · Software & Technology Services

Microsoft Corporation

Federal civil lawsuits naming Microsoft Corporation, a Software & Technology Services company.

Public CompanySoftware & Technology Services

Ticker: Nasdaq: MSFT
Business: Services-Prepackaged Software
Headquarters: Redmond, WA
Incorporated in: Washington
SEC CIK: 789019

Microsoft Corporation is a public company in Services-Prepackaged Software, based in Redmond, WA (traded on Nasdaq as MSFT, incorporated in Washington). It appears in 2,296 federal civil lawsuits in this index, most often as a plaintiff (1,371 of 2,296). These cases are most often Copyright and Patent matters, filed between 1990 and 2026, most frequently in District Court, W.D. Washington. The most common causes of action are Patent Infringement, Copyright Infringement, and Trademark. Frequent opposing parties include Does, John Does 1-10, and Uniloc 2017 LLC.

2,296

Lawsuits

925

As Defendant

1,371

As Plaintiff

Open

2,215

Terminated

1990–2026

Span

8 mo

Median Duration

62 cases/yrNamed as plaintiff in 60% of casesRecent filings steady

Cases by State

HI · 1PR · 22

Open Cases Over Time

1990peak 229 open2026

Case Types Over Time

19902026

CopyrightPatentTrademarkAntitrustContract

Filings by Year

19902026

Case Types filter →

Where Filed filter →

Frequent Opposing Parties

Filtered Antitrust Clear

146 Cases — Newest First

Rockman v. Microsoft Corporation

Antitrust Open District Court, W.D. WashingtonNo. 2:26-cv-01876Filed 05/31/2026
Bryant v. Microsoft Corporation

Antitrust Open District Court, N.D. CaliforniaNo. 5:25-cv-08733Filed 10/13/2025
Federal Trade Commission v. Microsoft Corporation

Antitrust Terminated District Court, N.D. CaliforniaNo. 3:23-cv-02880Filed 06/12/2023
Emrit v. Microsoft Corporation

Antitrust Terminated District Court, District of ColumbiaNo. 1:22-cv-00638Filed 03/07/2022
Deserae Ryan v. Microsoft Corporation

Antitrust Terminated District Court, N.D. CaliforniaNo. 5:14-cv-04634Filed 10/16/2014
Miniframe Ltd v. Microsoft Corporation

Antitrust Terminated District Court, S.D. New YorkNo. 1:11-cv-07419Filed 10/19/2011
MedioStream, Inc v. Microsoft Corporation

Antitrust Terminated District Court, N.D. CaliforniaNo. 5:11-cv-03095Filed 06/23/2011
Datel Holdings Ltd v. Microsoft Corporation

Antitrust Terminated District Court, N.D. CaliforniaNo. 3:09-cv-05535Filed 11/20/2009
Tangent Computer Inc v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:06-cv-01026Filed 05/08/2006
Edward Michael OBrien v. Microsoft Corporation

Antitrust Terminated District Court, C.D. CaliforniaNo. 2:06-cv-00939Filed 02/16/2006
Tangent Computer Inc v. Microsoft Corporation

Antitrust Terminated District Court, N.D. CaliforniaNo. 3:06-cv-00953Filed 02/14/2006
Edward Michael O'Brien v. Microsoft Corporation

Antitrust Terminated District Court, C.D. CaliforniaNo. 2:05-cv-08130Filed 11/15/2005
Walsh v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:05-cv-01277Filed 05/16/2005
Novell, Inc v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:05-cv-01087Filed 05/13/2005
Walsh v. Microsoft Corporation

Antitrust Terminated District Court, D. South CarolinaNo. 1:05-cv-00900Filed 03/24/2005
Hood v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiFiled 09/30/2004
City and County of San Francisco v. Microsoft Corporation

Antitrust Terminated District Court, N.D. CaliforniaNo. 3:04-cv-04077Filed 09/27/2004
Realnetworks, Inc v. Microsoft Corp

Antitrust Terminated District Court, D. MarylandNo. 1:04-cv-00968Filed 04/13/2004
Realnetworks, Inc v. Microsoft Corp

Antitrust Terminated District Court, N.D. CaliforniaNo. 5:03-cv-05717Filed 12/18/2003
Birdsong Tractor and Supply, Inc v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-03460Filed 12/16/2003
Birdsong Tractor v. Microsoft Corp

Antitrust Terminated District Court, E.D. ArkansasNo. 4:03-cv-00474Filed 06/18/2003
O'Brien v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-01035Filed 04/21/2003
Bailey v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00750Filed 04/07/2003
Wyatt v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00756Filed 03/27/2003
Green v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00758Filed 03/27/2003
Walton v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00757Filed 03/27/2003
Calvert v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00755Filed 03/27/2003
Green v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00754Filed 03/27/2003
Harried v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00753Filed 03/27/2003
Pigg v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00751Filed 03/27/2003
Brinkley v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00752Filed 03/27/2003
Lewis v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00749Filed 03/27/2003
McHann v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00748Filed 03/27/2003
Addington v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00747Filed 03/27/2003
Stewart v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00746Filed 03/27/2003
Grubb v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00745Filed 03/27/2003
Gardner v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00744Filed 03/27/2003
Mascagni v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00743Filed 03/27/2003
Lewis v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00742Filed 03/27/2003
Roby v. Microsoft Corporation

Antitrust Terminated District Court, D. MarylandNo. 1:03-cv-00741Filed 03/27/2003
Walton v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiNo. 5:03-cv-00024Filed 01/15/2003
Green v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiNo. 5:03-cv-00025Filed 01/15/2003
Wyatt v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiNo. 5:03-cv-00023Filed 01/15/2003
Calvert v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiNo. 5:03-cv-00022Filed 01/15/2003
Green v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiNo. 5:03-cv-00021Filed 01/15/2003
Brinkley v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiNo. 5:03-cv-00019Filed 01/15/2003
Harried v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiNo. 5:03-cv-00020Filed 01/15/2003
Pigg v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiNo. 3:03-cv-00041Filed 01/15/2003
Bailey v. Microsoft Corp

Antitrust Terminated District Court, S.D. MississippiNo. 3:03-cv-00040Filed 01/15/2003
Roby v. Microsoft Corp

Antitrust Terminated District Court, N.D. MississippiNo. 1:03-cv-00016Filed 01/15/2003

Showing 1–50 of 146