Mark Ein

Founder at CAPITOL INVESTMENT CORP. VI

Net worth: 57 M $ as of 2026-05-30

61 year

66 connections

Finance

Commercial Services

Consumer Services

Profile

Mark D.
Ein founded Washington Kastles LLC in 2008, where he is working as Owner, Mde City Paper Holdings LLC in 2018, Washington City Paper in 1981, and various other companies.
Mr. Ein also founded Leland Consulting Group, Inc., where he is working as Chairman & Chief Executive Officer.
Mr. Ein also currently works at Visual Systems Group, Inc., as Chairman from 2015, Kastle Systems International LLC, as Co-Chairman from 2007, District of Columbia Public Education Fund, as Chairman from 2010, and various other companies.
Mr. Ein also formerly worked at Capitol Acquisition Corp., as Chief Executive Officer & Director from 2007 to 2009, Capitol Acquisition Corp.
II, as Chairman & Chief Executive Officer in 2015, Capitol Acquisition Corp.
III, as Chairman & Chief Executive Officer from 2015 to 2017, and various other companies.
Mr. Ein received his Masters Business Admin degree from Harvard Business School and undergraduate degree in 1987 from The Wharton School of the University of Pennsylvania.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
CUSTOM TRUCK ONE SOURCE INC 2.27%	2026-04-15	5,166,178 ( 2.27% )	49 M $	2026-05-30
LINDBLAD EXPEDITIONS HOLDINGS, INC. 0.5%	2026-04-13	328,602 ( 0.5% )	8 M $	2026-05-30

Mark Ein active positions

Companies	Position	Start
LINDBLAD EXPEDITIONS HOLDINGS, INC.	Chairman	2013-02-28
CAPITOL INVESTMENT CORP. VI	Founder	2021-01-18
CAPITOL INVESTMENT CORP. VII	Chief Executive Officer	2021-01-18
CUSTOM TRUCK ONE SOURCE, INC.	Director/Board Member	2021-03-31
SOHO HOUSE & CO INC.	Director/Board Member	2017-12-31
Venturehouse Group LLC Venturehouse Group LLC Investment ManagersFinance Venturehouse Group invests in companies located in the United States. The firm focuses on a broad range of sectors and industries. It provides financing for buyout transactions.	Chief Executive Officer	1999-10-31
Kastle Systems LLC Kastle Systems LLC Miscellaneous Commercial ServicesCommercial Services Operates as security provider and patrol service	Chairman	-
The World Economic Forum USA, Inc. The World Economic Forum USA, Inc. Miscellaneous Commercial ServicesCommercial Services Operates an organization for economic reforms	Corporate Officer/Principal	2015-12-31
Smithsonian National Museum of Natural History Smithsonian National Museum of Natural History Other Consumer ServicesConsumer Services Operates as a museum	Director/Board Member	-
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All active positions of Mark Ein

Former positions of Mark Ein

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See the detail of Mark Ein's experience

Training of Mark Ein

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

See the detail of Mark Ein's experience

Connections

1st degree connections

1st degree companies

Male

Female

Members of the board

Executives

See the personal network

Linked companies

Private companies	55
LCC International, Inc. LCC International, Inc. Information Technology ServicesTechnology Services Provides engineering and network services for the telecommunications industry	Technology Services
Citigroup, Inc. Citigroup, Inc. Major BanksFinance Provides retail, investment, commercial banking, brand cards, securities sale & exchanges services	Finance
Capitol Acquisition Corp. Capitol Acquisition Corp. Financial ConglomeratesFinance Blank Check Company with focus on the technology, media and telecommunications industry	Finance
Capitol Acquisition Corp. II Capitol Acquisition Corp. II Financial ConglomeratesFinance Operates as a blank check company	Finance
The Carlyle Group LP (Corporate Private Equity) The Carlyle Group LP (Corporate Private Equity) Investment ManagersFinance The Carlyle Group focuses on companies located across the globe. The firm targets companies operating across a broad range of sectors and industries. It provides financing for buyouts and growth stage capital requirements.[[ [[Carlyle Group reorganized its operating segments on January 8, 2021, by combining Corporate Private Equity and Real Assets into a single segment called - The Carlyle Group (Global Private Equity).	Finance
Venturehouse Group LLC Venturehouse Group LLC Investment ManagersFinance Venturehouse Group invests in companies located in the United States. The firm focuses on a broad range of sectors and industries. It provides financing for buyout transactions.	Finance
Visual Systems Group, Inc. Visual Systems Group, Inc. Information Technology ServicesTechnology Services Provides AV integration solutions	Technology Services
MACH SARL MACH SARL Information Technology ServicesTechnology Services Provides data and financial clearing mobile exchange solutions	Technology Services
National Gallery of Art National Gallery of Art Other Consumer ServicesConsumer Services Operates art museum	Consumer Services
National Institutes of Health National Institutes of Health General GovernmentGovernment Engages in the improvement of health and saving lives	Government
Kastle Systems International LLC Kastle Systems International LLC Miscellaneous Commercial ServicesCommercial Services Provides managed security solutions	Commercial Services
United States Tennis Association, Inc. United States Tennis Association, Inc. Movies/EntertainmentConsumer Services Promotes and develops the growth of tennis	Consumer Services
The Federal City Council The Federal City Council Miscellaneous Commercial ServicesCommercial Services Operates membership-based organization for advancement of civic life	Commercial Services
The Economic Club of Washington The Economic Club of Washington Miscellaneous Commercial ServicesCommercial Services Operates forum for distinguished global leaders to share the insights about major issues	Commercial Services
Wolf Trap Foundation for the Performing Arts Wolf Trap Foundation for the Performing Arts Miscellaneous Commercial ServicesCommercial Services Operates as a nonprofit organization that provides performing arts program services	Commercial Services
Potomac Officers Club Potomac Officers Club Miscellaneous Commercial ServicesCommercial Services Operates as a membership organization dedicated to connecting and empowering executives	Commercial Services
International Tennis Hall of Fame, Inc. International Tennis Hall of Fame, Inc. Other Consumer ServicesConsumer Services The International Tennis Hall of Fame (ITHF) is a non-profit organization that preserves and promotes the history of tennis and celebrates its champions. The ITHF is located in Newport, RI, with Hall of Famers hailing from 27 nations around the world. The Hall of Fame honors these legends and chronicles the sport's history in a comprehensive interactive museum and programming to celebrate the sport around the world.	Consumer Services
Foundation for the National Institutes of Health, Inc. Foundation for the National Institutes of Health, Inc. Miscellaneous Commercial ServicesCommercial Services Provides healthcare services	Commercial Services
The World Economic Forum USA, Inc. The World Economic Forum USA, Inc. Miscellaneous Commercial ServicesCommercial Services Operates an organization for economic reforms	Commercial Services
District of Columbia College Access Program District of Columbia College Access Program Miscellaneous Commercial ServicesCommercial Services Provides assistance to the students	Commercial Services
Washington City Paper Washington City Paper Publishing: NewspapersConsumer Services Publishes newspapers	Consumer Services
United States Export Council United States Export Council Miscellaneous Commercial ServicesCommercial Services Operates as an association of renewable energy trade organizations	Commercial Services
Washington Tennis & Education Foundation Washington Tennis & Education Foundation Washington Tennis & Education Foundation seeks to keep children off city streets during out-of-school time in a safe environment they can trust. Washington Tennis & Education Foundation is based in Washington, DC. The company engages children in productive activities that teach discipline, build confidence, improve school performance, and encourage a healthy lifestyle. WTEF empowers students to achieve their highest potential by helping them develop meaningful values and critical life skills that will lead them to make constructive life choices. The mission of WTEF is to improve the life prospects of low-income, underserved children and youth in the District of Columbia through athletic and academic enrichment.
The Seed Foundation The Seed Foundation Miscellaneous Commercial ServicesCommercial Services Provides scholarships to school students	Commercial Services
World Teamtennis International, Inc. World Teamtennis International, Inc. Movies/EntertainmentConsumer Services Operates professional tennis leagues	Consumer Services
Washington Kastles LLC Washington Kastles LLC Movies/EntertainmentConsumer Services Operates sports club	Consumer Services
Two Harbors Investment Corp. Two Harbors Investment Corp. Real Estate Investment TrustsFinance Operates as a real estate investment trust with a focus on residential mortgage-backed securities	Finance
Smithsonian National Museum of Natural History Smithsonian National Museum of Natural History Other Consumer ServicesConsumer Services Operates as a museum	Consumer Services
District of Columbia Public Education Fund
Leland Investments, Inc.
Reed Krakoff LLC Reed Krakoff LLC Apparel/FootwearConsumer Non-Durables Distributes women's clothing	Consumer Non-Durables
Kastle Holding Co. LLC
Kastle Systems LLC Kastle Systems LLC Miscellaneous Commercial ServicesCommercial Services Operates as security provider and patrol service	Commercial Services
The Wharton School of the University of Pennsylvania The Wharton School of the University of Pennsylvania Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Harvard Business School Harvard Business School Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
AgroFresh Solutions, Inc. AgroFresh Solutions, Inc. Agricultural Commodities/MillingProcess Industries Provides post-harvest solutions	Process Industries
Lindblad Expeditions Holdings, Inc. Lindblad Expeditions Holdings, Inc. Hotels/Resorts/Cruise linesConsumer Services Provides sea and land based expedition services	Consumer Services
Capitol Acquisition Corp. III Capitol Acquisition Corp. III Financial ConglomeratesFinance Operates as a blank check company	Finance
Cision Ltd. Cision Ltd. Packaged SoftwareTechnology Services Provides consumer and media intelligence, engagement & communication solutions	Technology Services
Capitol Investment Corp. IV Capitol Investment Corp. IV Finance/Rental/LeasingFinance Operates as an investment vehicle	Finance
Doma Holdings, Inc. (California) Doma Holdings, Inc. (California) Packaged SoftwareTechnology Services Develops machine intelligence technology for residential and commercial real estate transactions	Technology Services
District of Columbia Policy Center
Washington E-Sports Ventures LLC Washington E-Sports Ventures LLC Movies/EntertainmentConsumer Services Engages in managing professional e-sports team	Consumer Services
Mde City Paper Holdings LLC Mde City Paper Holdings LLC Mde City Paper Holdings LLC is a local news source that has been connecting residents and newcomers to since 1981. The company's journalism and events provide a platform for exploring the city, investigating corruption and exposing wrongdoing, analyzing the District's biggest issues, holding elected officials accountable, and spotlighting the vibrant arts and culture scene. With the support of their members, they offer award-winning photography and in-depth reporting on local news, events, and arts coverage. The company is committed to providing real local journalism and making their readers feel like part of the community. The company is based in Washington. The company was founded by Mark D. Ein.
Soho House Holdings Ltd. Soho House Holdings Ltd. RestaurantsConsumer Services Operates restaurants	Consumer Services
Nesco Holdings, Inc. Nesco Holdings, Inc. Finance/Rental/LeasingFinance Rents and sells specialty equipment	Finance
Leland Consulting Group, Inc. Leland Consulting Group, Inc. Real Estate DevelopmentFinance Provides real estate services	Finance
Capitol Investment Corp. V Capitol Investment Corp. V Financial ConglomeratesFinance Operates as a blank check company	Finance
The Gridiron Club & Foundation The Gridiron Club & Foundation Miscellaneous Commercial ServicesCommercial Services The Gridiron Club & Foundation is a company that operates in the Membership Organizations industry. It is headquartered in Washington.	Commercial Services
Capitol Investment Corp. VII Capitol Investment Corp. VII Financial ConglomeratesFinance Operates as blank check company	Finance
Capitol Investment Corp. VI Capitol Investment Corp. VI Financial ConglomeratesFinance Operates as a blank check company	Finance
BrightSpark Capitol Corp. BrightSpark Capitol Corp. Financial ConglomeratesFinance Operates as a blank check company	Finance
Soho House & Co., Inc. Soho House & Co., Inc. Miscellaneous Commercial ServicesCommercial Services Operates as a platform of physical and digital spaces that connects global group of members	Commercial Services
Custom Truck One Source, Inc. Custom Truck One Source, Inc. Finance/Rental/LeasingFinance Custom Truck One Source, Inc. engages in the sale and rental of truck and heavy equipment. The firm offers aftermarket parts and service, equipment customization, remanufacturing, financing solutions, and asset disposal services. The company was founded in 1996 and is headquartered in Kansas City, MO.	Finance
Doma Holdings, Inc. Doma Holdings, Inc. Specialty InsuranceFinance Provides title insurance and escrow services	Finance