Thomas MacMillan

Director/Board Member at SONOR INVESTMENTS LIMITED

Net worth: 6 250 $ as of 2026-06-29

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Profile

Thomas Carey MacMillan is President & Chief Executive Officer at The Corporation of Massey Hall & Roy Thomson Hall.
Mr. MacMillan is Director & Chairman of the Investment Committee at Private Debt Partners, Inc. since 2020.
Mr. MacMillan is Independent Director at Sonor Investments Ltd. since 2000.
Former roles include Chairman, President & Chief Executive Officer at Mellon Bank, NA; President & Chief Executive Officer at ONEX Canada Asset Management, Inc. from 2016 to 2017; Chairman, President & Chief Executive Officer at CIBC Mellon Global Securities Services Co. from 1998 to 2009; Chairman, President & Chief Executive Officer at Onex Canada Asset Management, Inc. from 2016 to 2017; Chairman at I3 Advisors, Inc.; Chairman at Blair Franklin Asset Management, Inc.; Regional Director at The Bank of New York Mellon Corp.; Director at The Guarantee Co. of North America; Principal at Bank of Montreal; Principal at Montreal Trust Company of Canada; Principal at The Chase Manhattan Bank of Canada.
Education includes undergraduate degree from Princeton University and graduate degree from London School of Economics & Political Science.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
SONOR INVESTMENTS LTD 9 % CUM RED 1ST PREF SHS 0.82%	2025-04-21	1,600 ( 0.82% )	6 250 $	2026-06-29

Thomas MacMillan active positions

Companies	Position	Start
SONOR INVESTMENTS LIMITED	Director/Board Member	1999-12-31
The Corporation of Massey Hall & Roy Thomson Hall The Corporation of Massey Hall & Roy Thomson Hall Miscellaneous Commercial ServicesCommercial Services Operates charitable organization for concert halls	Chief Executive Officer	-
Private Debt Partners, Inc. Private Debt Partners, Inc. Investment ManagersFinance Private Debt Partners, Inc. is an active manager.	Investment Committee Member	2020-02-29

All active positions of Thomas MacMillan

Former positions of Thomas MacMillan

Companies	Position	End
GLUSKIN SHEFF + ASSOCIATES INC	Chief Executive Officer	2017-09-19
ONEX Canada Asset Management, Inc. (Investment Management) ONEX Canada Asset Management, Inc. (Investment Management) Investment ManagersFinance OCAM-IM seeks to preserve clients' capital, manage risk and deliver outstanding long-term investment returns through varying economic and market cycles. The firm focuses on generating strong absolute, rather than relative, investment returns. They employ bottom-up security selection based on fundamental analysis and in-depth research, coupled with their top-down macroeconomic view.	Chief Executive Officer	2017-09-18
CIBC Mellon Global Securities Services Co. CIBC Mellon Global Securities Services Co. Investment Banks/BrokersFinance Provides securities transfer services	Chief Executive Officer	2008-12-31
The Guarantee Company of North America The Guarantee Company of North America Specialty InsuranceFinance Provides insurance services	Director/Board Member	-
BANK OF NEW YORK MELLON CORPORATION (THE)	Corporate Officer/Principal	-

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Linked companies

Private companies	16
Bank of Montreal Bank of Montreal Major BanksFinance Provides national banking services	Finance
Mellon Bank, NA Mellon Bank, NA Regional BanksFinance Provides commercial banking services	Finance
Sonor Investments Ltd. Sonor Investments Ltd. MiscellaneousMiscellaneous Operates as an investment management company	Miscellaneous
The Bank of New York Mellon Corp. The Bank of New York Mellon Corp. Investment Banks/BrokersFinance Provides securities, investment and wealth management services	Finance
Montreal Trust Company of Canada Montreal Trust Company of Canada Regional BanksFinance Operates as a transfer agent, corporate trustee and fiduciary	Finance
ONEX Canada Asset Management, Inc. (Investment Management) ONEX Canada Asset Management, Inc. (Investment Management) Investment ManagersFinance OCAM-IM seeks to preserve clients' capital, manage risk and deliver outstanding long-term investment returns through varying economic and market cycles. The firm focuses on generating strong absolute, rather than relative, investment returns. They employ bottom-up security selection based on fundamental analysis and in-depth research, coupled with their top-down macroeconomic view.	Finance
The Guarantee Company of North America The Guarantee Company of North America Specialty InsuranceFinance Provides insurance services	Finance
CIBC Mellon Global Securities Services Co. CIBC Mellon Global Securities Services Co. Investment Banks/BrokersFinance Provides securities transfer services	Finance
Princeton University Princeton University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
London School of Economics & Political Science London School of Economics & Political Science Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
ONEX Canada Asset Management, Inc. ONEX Canada Asset Management, Inc. Investment ManagersFinance Provides investment advisory services	Finance
The Chase Manhattan Bank of Canada The Chase Manhattan Bank of Canada Regional BanksFinance Provides banking services	Finance
The Corporation of Massey Hall & Roy Thomson Hall The Corporation of Massey Hall & Roy Thomson Hall Miscellaneous Commercial ServicesCommercial Services Operates charitable organization for concert halls	Commercial Services
I3 Advisors, Inc. I3 Advisors, Inc. Miscellaneous Commercial ServicesCommercial Services Provides risk management services	Commercial Services
Blair Franklin Asset Management, Inc. Blair Franklin Asset Management, Inc. Investment ManagersFinance Blair Franklin Asset Management specializes in fixed income-focused alternative asset management services. The firm seeks to deliver positive absolute returns to clients through its two funds: the Blair Franklin Global Credit Fund LP and the Blair Franklin Global Rates LP. The funds employ relative value strategies that are not directly dependent on either the absolute level of interest rates or a rising/falling rate environment. The Blair Franklin Global Credit Fund generates returns through long and short exposure to credit spreads globally. Foreign exchange exposure and interest rate exposure are minimized. The fund’s investment universe is global corporate and government fixed income products. The Blair Franklin Global Rates Fund generates returns from interest rate changes in major global markets. Foreign exchange exposure is minimized. The fund’s investment universe is G20 government and agency bonds, futures and derivatives. Returns are not dependent on the absolute level of interest rates.	Finance
Private Debt Partners, Inc. Private Debt Partners, Inc. Investment ManagersFinance Private Debt Partners, Inc. is an active manager.	Finance