David Tanner

Director/Board Member at WHITE MOUNTAINS INSURANCE GROUP, LTD.

Net worth: 4 M $ as of 2026-06-29

67 year

52 connections

Finance

Commercial Services

Consumer Services

Profile

David Allen Tanner is Deputy Chairman at White Mountains Insurance Group Ltd. since 2020.
He is Chairman at New York University School of Law, Chairman-Emeritus at Montefiore Einstein, Inc., Director at Carroll & Milton Petrie Foundation, Inc., Excelline Food Products LLC, Coastal Sunbelt Produce LLC since 2015, CiCi's Holdings, Inc., Lawyers for Children, Inc., Wholesome Sweeteners, Inc., Top Aces Corp., and Northeast Bank (Maine) as Independent Director since 2010.
He is Managing Director at Three Mile Capital LLC since 2017 and Director at Northeast Bank (Maine) since 2010.
He is Trustee at New York University and Central Synagogue and Member at Council on Foreign Relations, Inc. Former roles include Chairman-Executive Committee at Jewish Communal Fund, Chairman at Montefiore Medical Center, Director at Protection One, Inc. from 2005 to 2008, Managing Director at Warburg Pincus LLC from 1986 to 1997, Director at Protection One Alarm Monitoring, Inc., Managing Director at Lazard Frères & Co. LLC from 1998 to 2000, Independent Director at Northeast Bancorp (Maine) from 2011 to 2019, Director at Carlile Bancshares, Inc., Managing Director at Arlon Group LLC from 2006 to 2017, Managing Director at Arlon Capital Partners Management Co. LLC, Executive Vice President at Continental Grain Company Corp.
from 2011 to 2017, Senior Advisor at Quadrangle Group LLC from 2000 to 2006, Managing Principal at Corporate Partners & Co. LLC from 1998 to 2000, Trustee at Citizens Budget Commission, Inc., and Managing Principal at Lazard Capital Partners from 1998 to 2000.
Education includes undergraduate degree from Princeton University and graduate degree from New York University School of Law.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
WHITE MOUNTAINS INSURANCE GROUP LTD 0.08%	2026-05-20	2,014 ( 0.08% )	4 M $	2026-06-29

David Tanner active positions

Companies	Position	Start
NORTHEAST BANK	Director/Board Member	2010-12-28
WHITE MOUNTAINS INSURANCE GROUP, LTD.	Director/Board Member	2018-08-23
Wholesome Sweeteners, Inc. Wholesome Sweeteners, Inc. Agricultural Commodities/MillingProcess Industries Provides organic sweeteners	Director/Board Member	-
Top Aces Corp. Top Aces Corp. Miscellaneous Commercial ServicesCommercial Services Provides advanced airborne training services	Director/Board Member	-
Carroll & Milton Petrie Foundation, Inc.	Director/Board Member	-
Montefiore Medicine Academic Health System, Inc. Montefiore Medicine Academic Health System, Inc. Hospital/Nursing ManagementHealth Services Provides health care services for charity	Director/Board Member	-
New York University New York University Other Consumer ServicesConsumer Services Functions as a College/University	Director/Board Member	-
Council on Foreign Relations, Inc. Council on Foreign Relations, Inc. Investment Trusts/Mutual FundsMiscellaneous Functions as a foundation or endowment	Corporate Officer/Principal	-
Three Mile Capital LLC Three Mile Capital LLC Financial ConglomeratesFinance Provides investment services	Corporate Officer/Principal	2017-05-31
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All active positions of David Tanner

Former positions of David Tanner

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See the detail of David Tanner's experience

Training of David Tanner

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

See the detail of David Tanner's experience

Connections

1st degree connections

1st degree companies

Male

Female

Members of the board

Executives

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Linked companies

Private companies	31
Protection One, Inc. Protection One, Inc. Miscellaneous Commercial ServicesCommercial Services Provides electronic security alarm monitoring systems	Commercial Services
Warburg Pincus LLC Warburg Pincus LLC Investment ManagersFinance Warburg Pincus invests in companies located across the globe. The firm focuses on a broad range of sectors and industries. It provides financing for buyout transactions.	Finance
Protection One Alarm Monitoring, Inc. Protection One Alarm Monitoring, Inc. Miscellaneous Commercial ServicesCommercial Services Provides installation, maintenance and monitoring of electronic security systems	Commercial Services
Lazard Frères & Co. LLC Lazard Frères & Co. LLC Investment ManagersFinance Provides corporate advisory, capital market, and asset management services	Finance
Northeast Bancorp (Maine) Northeast Bancorp (Maine) Regional BanksFinance Operates as a bank holding company whose subsidiary provides banking services	Finance
White Mountains Insurance Group Ltd. White Mountains Insurance Group Ltd. Multi-Line InsuranceFinance Provides property and casualty insurance services	Finance
Carroll & Milton Petrie Foundation, Inc.
Carlile Bancshares, Inc. Carlile Bancshares, Inc. Financial ConglomeratesFinance Provides commercial and personal banking services	Finance
Jewish Communal Fund Jewish Communal Fund Services to the Health IndustryHealth Services Provides public charity services	Health Services
Continental Grain Company Corp. Continental Grain Company Corp. Financial ConglomeratesFinance Provides investment services and operates food production businesses	Finance
Quadrangle Group LLC Quadrangle Group LLC Investment ManagersFinance Quadrangle Group invests in middle market companies located in the United States. The firm focuses on sectors such as media and communication. It participates in buyouts and distressed capital requirements. It also takes minority controlling interest.	Finance
Excelline Food Products LLC Excelline Food Products LLC Food: Specialty/CandyConsumer Non-Durables Manufactures and markets specialty frozen foods	Consumer Non-Durables
Northeast Bank (Maine) Northeast Bank (Maine) Regional BanksFinance Functions as a state chartered commercial bank	Finance
New York University New York University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Princeton University Princeton University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Montefiore Medical Center Montefiore Medical Center Miscellaneous Commercial ServicesCommercial Services Provides healthcare, clinical and surgical services	Commercial Services
Council on Foreign Relations, Inc. Council on Foreign Relations, Inc. Investment Trusts/Mutual FundsMiscellaneous Functions as a foundation or endowment	Miscellaneous
Coastal Sunbelt Produce LLC Coastal Sunbelt Produce LLC Food DistributorsDistribution Services Supplies fruits and vegetables	Distribution Services
CiCi's Holdings, Inc. CiCi's Holdings, Inc. RestaurantsConsumer Services Operates as a holding company	Consumer Services
Corporate Partners & Co. LLC Corporate Partners & Co. LLC Investment ManagersFinance Corporate Partners invests in public and private companies located in Europe and North America. The firm focuses on companies operating across a broad range of sectors. It provides financing in the form of common stock, options/warrants, convertible preferred stock, and convertible debt for buyout transactions with an investment size of USD 25 - 100 million. It makes co-investments. It acquires minority stakes in companies and takes a seat on the board of directors.	Finance
Citizens Budget Commission, Inc. Citizens Budget Commission, Inc. Miscellaneous Commercial ServicesCommercial Services Operates non-profit civic organization whose mission is to achieve constructive change in the finances and services	Commercial Services
Central Synagogue	Commercial Services
Lawyers for Children, Inc. Lawyers for Children, Inc. Miscellaneous Commercial ServicesCommercial Services Operates as a children's law office	Commercial Services
Wholesome Sweeteners, Inc. Wholesome Sweeteners, Inc. Agricultural Commodities/MillingProcess Industries Provides organic sweeteners	Process Industries
Arlon Group LLC Arlon Group LLC Investment ManagersFinance Provides investment services	Finance
Arlon Capital Partners Management Co. LLC Arlon Capital Partners Management Co. LLC Investment ManagersFinance Arlon Capital Partners invests in middle market companies located in the United States, Latin America, Western Europe and China. The firm focuses on broad range of sectors and industries. It provides financing in form of growth and buyout capital requirements.	Finance
New York University School of Law New York University School of Law Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Top Aces Corp. Top Aces Corp. Miscellaneous Commercial ServicesCommercial Services Provides advanced airborne training services	Commercial Services
Montefiore Medicine Academic Health System, Inc. Montefiore Medicine Academic Health System, Inc. Hospital/Nursing ManagementHealth Services Provides health care services for charity	Health Services
Three Mile Capital LLC Three Mile Capital LLC Financial ConglomeratesFinance Provides investment services	Finance
Lazard Capital Partners