![Ellen Costello](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Ellen Costello
Director/Board Member at
CITIGROUP INC.
Net worth: 10 M $ as of 2026-07-30
Profile
Currently, Ellen M.
Costello is Chairman at Finastra USA Corp., Inc., Independent Director at Citigroup, Inc. since 2016, Director at The Chicago Council on Global Affairs, Citibank Maghreb SA, The Chicago Public Education Fund, Diebold Nixdorf Holding Germany GmbH, and a Member-Governors Board at St. Francis Xavier University.
Also holds membership positions at The Chicago Network and The Commercial Club of Chicago.
Formerly, Chief Executive Officer at Harris Bankcorp, Inc. from 1983 to 2011, President & Chief Executive Officer at BMO Bank NA from 2006 to 2011, Vice Chairman at BMO Nesbitt Burns, Inc. (US) and BMO Capital Markets Corp.
(Broker), Vice Chairman at BMO Financial Corp.
from 2000 to 2006, Independent Director at Diebold Nixdorf, Inc., Director at Citibank NA (New York), The Chicago Community Trust, Citibank NA (Auckland Branch), Chicago Symphony Orchestra Association, After School Matters, Inc., United Way of Metro Chicago, Inc., Independent Director at DH Corporation from 2015 to 2017, Head-United States Country at Bank of Montreal from 2011 to 2013, and member of The Economic Club of Chicago (Illinois), The Financial Services Roundtable, and The Chicago Club.
Education includes an MBA from Dalhousie University and an undergraduate degree from St. Francis Xavier University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-03-22 | 74,569 ( 0% ) | 10 M $ | 2026-07-30 |
Ellen Costello active positions
| Companies | Position | Start |
|---|---|---|
| CITIGROUP INC. | Director/Board Member | 2016-01-14 |
Citibank Maghreb SA
 Citibank Maghreb SA Major BanksFinance Operates as a nationally chartered commercial bank | Director/Board Member | - |
Finastra USA Corp., Inc.
 Finastra USA Corp., Inc. Packaged SoftwareTechnology Services Develops software for financial institutions | Chairman | - |
The Chicago Council on Global Affairs
 The Chicago Council on Global Affairs Miscellaneous Commercial ServicesCommercial Services Operates as independent nonpartisan membership organization that provides insight and influence the public disclosure on critical global issues | Director/Board Member | - |
The Commercial Club of Chicago
 The Commercial Club of Chicago Miscellaneous Commercial ServicesCommercial Services Operates as a membership organization | Corporate Officer/Principal | - |
The Chicago Network
 The Chicago Network Miscellaneous Commercial ServicesCommercial Services Operates as a professional organization for women's | Corporate Officer/Principal | - |
St. Francis Xavier University
 St. Francis Xavier University Other Consumer ServicesConsumer Services Functions as a College/University | Director/Board Member | - |
The Chicago Public Education Fund
 The Chicago Public Education Fund Miscellaneous Commercial ServicesCommercial Services Operates non-profit organization working to build public schools | Director/Board Member | - |
Diebold Nixdorf Holding Germany GmbH
 Diebold Nixdorf Holding Germany GmbH Financial ConglomeratesFinance Functions as an investment holding company | Director/Board Member | - |
Former positions of Ellen Costello
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Training of Ellen Costello
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
85
1st degree connections
27
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 27 |
|---|---|
Bank of Montreal
 Bank of Montreal Major BanksFinance Provides national banking services | Finance |
Diebold Nixdorf, Inc.
 Diebold Nixdorf, Inc. Electronic Equipment/InstrumentsElectronic Technology Operates multinational financial and retail technology company which develops and sells automatic teller machines and point-of-sale terminals & provides transaction systems software solutions | Electronic Technology |
Harris Bankcorp, Inc.
 Harris Bankcorp, Inc. Financial ConglomeratesFinance Operates as a bank holding company | Finance |
Citigroup, Inc.
 Citigroup, Inc. Major BanksFinance Provides retail, investment, commercial banking, brand cards, securities sale & exchanges services | Finance |
Citibank NA (New York)
 Citibank NA (New York) Major BanksFinance Provides national commercial banking services | Finance |
BMO Nesbitt Burns, Inc. (US) | Finance |
Finastra USA Corp., Inc.
Finastra USA Corp., Inc. Packaged SoftwareTechnology Services Develops software for financial institutions | Technology Services |
Dalhousie University
 Dalhousie University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
St. Francis Xavier University
St. Francis Xavier University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
The Chicago Community Trust
 The Chicago Community Trust Miscellaneous Commercial ServicesCommercial Services Provides charity services | Commercial Services |
BMO Capital Markets Corp. (Broker)
 BMO Capital Markets Corp. (Broker) Investment Banks/BrokersFinance Provides brokerage services | Finance |
Citibank NA (Auckland Branch)
 Citibank NA (Auckland Branch) Regional BanksFinance Citibank NA provides commercial banking services. The company was founded in 1947 and is headquartered in Auckland, New Zealand. | Finance |
The Commercial Club of Chicago
The Commercial Club of Chicago Miscellaneous Commercial ServicesCommercial Services Operates as a membership organization | Commercial Services |
Chicago Symphony Orchestra Association
 Chicago Symphony Orchestra Association Movies/EntertainmentConsumer Services Operates music bands and orchestra | Consumer Services |
The Financial Services Roundtable
 The Financial Services Roundtable Miscellaneous Commercial ServicesCommercial Services Provides advisory services to financial service industry | Commercial Services |
The Chicago Network
The Chicago Network Miscellaneous Commercial ServicesCommercial Services Operates as a professional organization for women's | Commercial Services |
The Economic Club of Chicago (Illinois)
 The Economic Club of Chicago (Illinois) Miscellaneous Commercial ServicesCommercial Services Engages in fostering connections among leaders to encourage dialogue on important economic and social issues | Commercial Services |
BMO Bank NA
 BMO Bank NA Major BanksFinance Provides national charted banking services | Finance |
The Chicago Council on Global Affairs
The Chicago Council on Global Affairs Miscellaneous Commercial ServicesCommercial Services Operates as independent nonpartisan membership organization that provides insight and influence the public disclosure on critical global issues | Commercial Services |
The Chicago Public Education Fund
The Chicago Public Education Fund Miscellaneous Commercial ServicesCommercial Services Operates non-profit organization working to build public schools | Commercial Services |
Citibank Maghreb SA
Citibank Maghreb SA Major BanksFinance Operates as a nationally chartered commercial bank | Finance |
The Chicago Club
 The Chicago Club Miscellaneous Commercial ServicesCommercial Services Operates as a social club that provides catering and event services | Commercial Services |
After School Matters, Inc.
 After School Matters, Inc. Miscellaneous Commercial ServicesCommercial Services Provides after-school and summer programs for high school teens | Commercial Services |
United Way of Metro Chicago, Inc.
 United Way of Metro Chicago, Inc. Miscellaneous Commercial ServicesCommercial Services Operate as non-profit organization, which allocate funds for health, education, financial stability and safety | Commercial Services |
DH Corporation/Societe DH
 DH Corporation/Societe DH Miscellaneous Commercial ServicesCommercial Services Provides financial technology solutions | Commercial Services |
BMO Financial Corp.
 BMO Financial Corp. Major BanksFinance Operates as a bank holding company whose subsidiary provides commercial banking services | Finance |
Diebold Nixdorf Holding Germany GmbH
Diebold Nixdorf Holding Germany GmbH Financial ConglomeratesFinance Functions as an investment holding company | Finance |
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