Company · Insurance

Marsh & Mclennan Companies, Inc

Federal civil lawsuits naming Marsh & Mclennan Companies, Inc, a Insurance company.

Public CompanyInsurance

Ticker: NYSE: MRSH
Business: Insurance Agents, Brokers & Service
Headquarters: New York, NY
Incorporated in: Delaware
SEC CIK: 62709

Marsh & Mclennan Companies, Inc is a public company in Insurance Agents, Brokers & Service, based in New York, NY (traded on NYSE as MRSH, incorporated in Delaware). It appears in 212 federal civil lawsuits in this index, most often as a defendant (197 of 212). These cases are most often Contract and Securities / Commodities matters, filed between 1990 and 2025, most frequently in District Court, S.D. New York. The most common causes of action are Securities, Antitrust, and Employment. Frequent opposing parties include Marsh & McLennan Inc, Slay Industries, and Robinson.

212

Lawsuits

197

As Defendant

As Plaintiff

Open

203

Terminated

1990–2025

Span

16 mo

Median Duration

5.9 cases/yrPredominantly defendant · 93%Activity declining

Cases by State

AK · 2HI · 1

Open Cases Over Time

1990peak 60 open2025

Case Types Over Time

19902025

ContractSecurities / CommoditiesLaborCivil RightsAntitrust

Filings by Year

19902025

Case Types filter →

Contract56

Securities / Commodities44

Labor35

Civil Rights32

Antitrust24

Personal Property / Fraud8

Where Filed filter →

Frequent Opposing Parties

212 Cases — Newest First

Marsh & McLennan Agency LLC v. Alliant Insurance Services, Inc

Federal Tax / Statutory Actions Open District Court, S.D. New YorkNo. 1:25-cv-09837Filed 11/25/2025
Marsh & McLennan Agency LLC v. Southern III

Contract Open District Court, S.D. New YorkNo. 1:25-cv-09080Filed 10/31/2025
Oldenburg v. Marsh & McLennan Agency LLC

Contract Open District Court, S.D. New YorkNo. 1:25-cv-08335Filed 10/08/2025
Marsh & McLennan Agency LLC v. Alliant Insurance Services, Inc

Contract Open District Court, S.D. New YorkNo. 1:25-cv-06936Filed 08/21/2025
Fortune-HR, LLC v. Marsh & McLennan Agency, LLC

Trademark Open District Court, S.D. OhioNo. 2:25-cv-00931Filed 08/18/2025
Marsh & Mclennan Agency, LLC v. Ima Financial Group, Inc

Contract Open District Court, M.D. North CarolinaNo. 1:25-cv-00222Filed 03/20/2025
Mac Flipper, LLC v. Marsh & McLennan Agency LLC

Contract Open District Court, S.D. FloridaNo. 1:25-cv-21084Filed 03/07/2025
Marsh & McLennan Agency LLC v. Stedman

Contract Open District Court, S.D. New YorkNo. 1:24-cv-01671Filed 03/05/2024
Xanthopoulos, PhD v. Marsh & McLennan Companies, Inc

Civil Rights Terminated District Court, N.D. IllinoisNo. 1:22-cv-06792Filed 12/02/2022
Antoine v. Marsh & McLennan Companies Inc

Labor Terminated District Court, S.D. New YorkNo. 1:22-cv-06637Filed 08/04/2022
Coopers Creek Chemical Corp v. Marsh & Mclennan Agency LLC

Personal Property / Fraud Terminated District Court, E.D. PennsylvaniaNo. 2:22-cv-01275Filed 04/04/2022
Halo Synergy Group v. Marsh and McLennan Agency, LLC

Contract Open District Court, D. NebraskaNo. 8:21-cv-00386Filed 09/30/2021
Barnard v. Marsh & McLennan Agency

Civil Rights Terminated District Court, S.D. OhioNo. 3:20-cv-00041Filed 02/03/2020
Johns v. Marsh & McLennan Agency LLC

Civil Rights Terminated District Court, M.D. AlabamaNo. 3:19-cv-00687Filed 09/18/2019
Hendricks v. Marsh & McLennan Companies, Inc

Labor Terminated District Court, S.D. IowaNo. 3:18-cv-00128Filed 12/27/2018
Parker v. Marsh & McLennan Agency, LLC

Civil Rights Terminated District Court, W.D. TexasNo. 1:18-cv-00765Filed 09/06/2018
Leap Agency, LLC v. Marsh & McLennan Companies, Inc

Contract Terminated District Court, W.D. KentuckyNo. 3:18-cv-00450Filed 07/12/2018
Williams v. Marsh & McLennan Companies, Inc

Civil Rights Terminated District Court, N.D. IllinoisNo. 1:18-cv-02842Filed 04/20/2018
Cat Express, Inc v. Marsh & McLennan Agency LLC

Contract Terminated District Court, N.D. IllinoisNo. 1:17-cv-08380Filed 11/20/2017
Santana v. Marsh & McLennan Companies, Inc

Civil Rights Terminated District Court, S.D. New YorkNo. 1:17-cv-05755Filed 07/28/2017
Russell v. Marsh & McLennan Agency, LLC

Contract Terminated District Court, E.D. VirginiaNo. 3:17-cv-00511Filed 07/18/2017
Marsh & McLennan Agency, LLC v. Kolkhorst

Contract Terminated District Court, S.D. New YorkNo. 1:17-cv-03975Filed 05/25/2017
E.S v. Marsh & Mclennan Companies, Inc. Benefits Administration Committee

Labor Terminated District Court, D. New JerseyNo. 2:17-cv-03351Filed 05/15/2017
Crowe v. Marsh & McLennan Companies, Inc

Labor Terminated District Court, S.D. OhioNo. 2:16-cv-01053Filed 11/04/2016
Holly v. Marsh & McLennan Companies, LLC

Labor Terminated District Court, D. ColoradoNo. 1:16-cv-00743Filed 03/31/2016
Marsh & McLennan Agency, LLC v. Connors

Contract Terminated District Court, D. MassachusettsNo. 1:16-cv-10248Filed 02/12/2016
Tallen v. Marsh & McLennan Companies, Inc

Contract Terminated District Court, D. MinnesotaNo. 0:15-cv-02415Filed 05/06/2015
Guruswamy v. Marsh & McLennan Companies Inc

Civil Rights Terminated District Court, S.D. New YorkNo. 1:13-cv-07598Filed 10/25/2013
Fantasia v. Marsh & McLennan Companies, Inc

Labor Terminated District Court, D. MassachusettsNo. 1:13-cv-12627Filed 10/17/2013
McBurnie v. Marsh & McLennan Companies, Inc

Civil Rights Terminated District Court, S.D. New YorkNo. 1:12-cv-03621Filed 05/08/2012
Payne v. Marsh & McLennan Agency LLC

Contract Terminated District Court, E.D. VirginiaNo. 1:12-cv-00001Filed 01/03/2012
Marsh & McLennan Companies, Inc v. Gio Insurance Limited

Contract Terminated District Court, S.D. New YorkNo. 1:11-cv-08391Filed 11/18/2011
Coon v. Marsh & McLennan Agency, LLC

Contract Terminated District Court, E.D. VirginiaNo. 3:11-cv-00463Filed 07/20/2011
Voltz v. Marsh & McLennan Companies, Inc

Labor Terminated District Court, M.D. PennsylvaniaNo. 1:11-cv-01144Filed 06/15/2011
Saltzman v. Marsh and McLennan Companies

Civil Rights Terminated District Court, E.D. New YorkNo. 2:11-cv-01621Filed 04/04/2011
Doyle v. Marsh & McLennan Companies, Inc

Labor Terminated District Court, S.D. IowaNo. 4:10-cv-00488Filed 10/20/2010
Crowe v. Marsh & McLennan Agency, LLC

Contract Terminated District Court, E.D. VirginiaNo. 1:10-cv-01016Filed 09/09/2010
Smith v. Marsh McLennan Companies Optional Long Term Disability

Contract Terminated District Court, W.D. WashingtonNo. 2:09-cv-01158Filed 08/14/2009
Slay Industries v. Marsh & Mclennan Companies Inc

Antitrust Terminated District Court, E.D. MissouriNo. 4:09-cv-01273Filed 08/11/2009
Edwards v. Marsh & McLennan Companies

Civil Rights Terminated District Court, S.D. IowaNo. 4:09-cv-00242Filed 06/16/2009
Sarni v. Marsh & McLennan Co., Inc

Labor Terminated District Court, D. MassachusettsNo. 1:09-cv-10218Filed 02/13/2009
Consolidated Electrical Distributors,inc v. Marsh & Mclennan Companies, Inc

Antitrust Terminated District Court, D. New JerseyNo. 2:08-cv-06381Filed 12/31/2008
McManus v. J&H Marsh & McLennan, Inc

Civil Rights Terminated District Court, W.D. New YorkNo. 6:08-cv-06562Filed 12/12/2008
Tiara Condominium Association, Inc v. Marsh & McLennan Companies, Inc

Personal Property / Fraud Terminated District Court, S.D. FloridaNo. 9:08-cv-80254Filed 03/11/2008
Anderson v. Marsh & McLennan Companies Inc

Labor Terminated District Court, S.D. New YorkNo. 1:08-cv-02378Filed 03/07/2008
Jurik v. Marsh and McLennan Companies, Inc

Civil Rights Terminated District Court, N.D. IllinoisNo. 1:08-cv-00544Filed 01/24/2008
La Rocco v. Marsh & McLennan Companies, Inc

Labor Terminated District Court, S.D. New YorkNo. 1:08-cv-00439Filed 01/17/2008
Sears, Roebuck and Co., Et Al v. Marsh & Mclennan Compan, Et Al

Antitrust Terminated District Court, D. New JerseyFiled 12/03/2007
Sears v. Marsh & Mclennan Companies, Inc

Antitrust Terminated District Court, D. New JerseyNo. 2:07-cv-05736Filed 12/03/2007
Tiara Condominium Association, Inc v. Marsh & McLennan Conpanies, Inc

Personal Property / Fraud Terminated District Court, S.D. New YorkNo. 1:07-cv-09392Filed 10/19/2007

Showing 1–50 of 212