Mathieu Streiff
Net worth: 9 M $ as of 2026-05-30
Net worth: 9 M $ as of 2026-05-30
Mathieu Bernard Streiff was the founder of American Healthcare Investors LLC, founded in 2011, serving as General Counsel & Managing Director from 2011 to 2019.
Current jobs include Director at Hawkhill House Ltd. since 2016, Independent Director at American Healthcare REIT, Inc. since 2026, Director at GAHC3 U.K.
Senior Care Holding Ltd., Director at Coniston Care Centre Ltd. since 2016, Director at Orchard St Albans Housing Portfolio Ltd. since 2015, Member of the New York State Bar Association, Executive Vice President at Griffin-American Healthcare REIT Sub-Advisor, LLC since 2012, and Executive Vice President at Griffin-American Strategic Holdings LLC since 2012.
Former jobs include Director at Trilogy Investors LLC, Executive Vice President & General Counsel at Grubb & Ellis Co. from 2010 to 2011, Executive Vice President & General Counsel at Griffin-American Healthcare REIT II, Inc. from 2012 to 2014, Executive Vice President & General Counsel at Griffin-American Healthcare REIT III, Inc. from 2013 to 2021, Associate at Latham & Watkins LLP from 2002 to 2006, Secretary, Executive VP & General Counsel at Grubb & Ellis Realty Investors LLC in 2011, and Executive Vice President at Griffin American Healthcare Reit Advisor LLC from 2011 to 2014.
Education includes undergraduate studies at the University of California, Berkeley and graduate studies at Columbia Law School.
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-03-31 | 189,779 ( 0.09% ) | 9 M $ | 2026-05-30 |
| Companies | Position | Start |
|---|---|---|
| AMERICAN HEALTHCARE REIT, INC. | Director/Board Member | 2021-09-30 |
Orchard St Albans Housing Portfolio Ltd.
Orchard St Albans Housing Portfolio Ltd. Medical/Nursing ServicesHealth Services Provides residential nursing care services | Director/Board Member | 2015-10-07 |
Coniston Care Centre Ltd.
Coniston Care Centre Ltd. Medical/Nursing ServicesHealth Services Operates care homes | Director/Board Member | 2016-11-14 |
Hawkhill House Ltd.
Hawkhill House Ltd. Hospital/Nursing ManagementHealth Services Operates care homes | Director/Board Member | 2016-11-14 |
GAHC3 U.K. Senior Care Holding Ltd.
GAHC3 U.K. Senior Care Holding Ltd. Real Estate DevelopmentFinance Engages in leasing residential care homes | Director/Board Member | - |
New York State Bar Association
New York State Bar Association Miscellaneous Commercial ServicesCommercial Services Operates as a bar association | Corporate Officer/Principal | 2010-12-21 |
Griffin-American Strategic Holdings LLC
Griffin-American Strategic Holdings LLC Real Estate Investment TrustsFinance Acts as a Real Estate Investment Trust/REIT | Corporate Officer/Principal | 2011-12-31 |
Griffin-American Healthcare REIT Sub-Advisor, LLC
Griffin-American Healthcare REIT Sub-Advisor, LLC Real Estate Investment TrustsFinance Real Estate Investment Trust/REIT | Corporate Officer/Principal | 2011-12-31 |
| Companies | Position | End |
|---|---|---|
Griffin-American Healthcare REIT III, Inc.
Griffin-American Healthcare REIT III, Inc. Real Estate Investment TrustsFinance Acts as a Real Estate Investment Trust/REIT | General Counsel | 2021-09-30 |
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Active
Inactive
Listed companies
Private companies
1st degree connections
1st degree companies
Male
Female
Members of the board
Executives
| Private companies | 18 |
|---|---|
Grubb & Ellis Co.
Grubb & Ellis Co. Real Estate DevelopmentFinance Provides integrated real estate services | Finance |
Trilogy Investors LLC
Trilogy Investors LLC Medical/Nursing ServicesHealth Services Owns and operates purpose-built senior healthcare campuses | Health Services |
Griffin-American Healthcare REIT II, Inc.
Griffin-American Healthcare REIT II, Inc. Real Estate Investment TrustsFinance Real Estate Investment Trust/REIT | Finance |
Griffin-American Healthcare REIT III, Inc.
Griffin-American Healthcare REIT III, Inc. Real Estate Investment TrustsFinance Acts as a Real Estate Investment Trust/REIT | Finance |
Latham & Watkins LLP
Latham & Watkins LLP Miscellaneous Commercial ServicesCommercial Services Provides legal services | Commercial Services |
University of California, Berkeley
University of California, Berkeley Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
New York State Bar Association
New York State Bar Association Miscellaneous Commercial ServicesCommercial Services Operates as a bar association | Commercial Services |
Grubb & Ellis Realty Investors LLC
Grubb & Ellis Realty Investors LLC Real Estate Investment TrustsFinance Provides real estate investment and asset management services | Finance |
Columbia Law School
Columbia Law School Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
American Healthcare Investors LLC
American Healthcare Investors LLC Financial ConglomeratesFinance Acquires and manages healthcare-related real estate | Finance |
Griffin-American Healthcare REIT Sub-Advisor, LLC
Griffin-American Healthcare REIT Sub-Advisor, LLC Real Estate Investment TrustsFinance Real Estate Investment Trust/REIT | Finance |
Hawkhill House Ltd.
Hawkhill House Ltd. Hospital/Nursing ManagementHealth Services Operates care homes | Health Services |
Griffin-American Strategic Holdings LLC
Griffin-American Strategic Holdings LLC Real Estate Investment TrustsFinance Acts as a Real Estate Investment Trust/REIT | Finance |
American Healthcare REIT, Inc.
American Healthcare REIT, Inc. Real Estate Investment TrustsFinance Acts as a Real Estate Investment Trust/REIT | Finance |
Griffin American Healthcare Reit Advisor LLC
Griffin American Healthcare Reit Advisor LLC Real Estate Investment TrustsFinance Real Estate Investment Trust/REIT | Finance |
GAHC3 U.K. Senior Care Holding Ltd.
GAHC3 U.K. Senior Care Holding Ltd. Real Estate DevelopmentFinance Engages in leasing residential care homes | Finance |
Coniston Care Centre Ltd.
Coniston Care Centre Ltd. Medical/Nursing ServicesHealth Services Operates care homes | Health Services |
Orchard St Albans Housing Portfolio Ltd.
Orchard St Albans Housing Portfolio Ltd. Medical/Nursing ServicesHealth Services Provides residential nursing care services | Health Services |
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