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Sun Life

Life & Health InsuranceFounded 1865
Reviewed by Swet Parvadiya
Company data updated: November 2026

Company History

Sun Life History: Founding, Growth & Key Milestones

Founded 1865 in Montreal, Quebec, Canada

When was Sun Life founded?

Sun Life was founded in 1865 in Montreal, Quebec, Canada by Mathew Hamilton Gault, Robertson Macaulay and Thomas Bassett Macaulay, making it 161 years old.

Founded
1865
Founding place
Montreal, Quebec, Canada
Founders
Mathew Hamilton Gault, Robertson Macaulay and Thomas Bassett Macaulay
Headquarters today
1 York Street, Toronto, Ontario, Canada
Milestones documented
14 (1865–2025)
Current CEO
Kevin Strain
Acquisitions
4
YearEvent
1865Chartered as The Sun Insurance Company of Montreal
1882Global International Expansion
1918Sun Life Building Construction in Montreal
1940Operation Fish WWII British Securities Vault
1962Mutualization Completed
1978Headquarters Relocation to Toronto
1982Landmark Acquisition of MFS Investment Management
2000Demutualization and TSX/NYSE IPO
2002Clarica Life Insurance Megamerger ($7.3B)
2014Creation of SLC Management (Institutional Alternatives)
2019Majority Stake in BentallGreenOak (BGO)
2021Kevin Strain Appointed President & CEO
2022Acquisition of DentaQuest for USD $2.475B
2025AUM Surpasses CAD $1.47 Trillion
Where was Sun Life founded?
Sun Life was founded in Montreal, Quebec, Canada in 1865. sunlife.com
Who founded Sun Life?
Sun Life was founded by Mathew Hamilton Gault, Robertson Macaulay and Thomas Bassett Macaulay.
When did Sun Life start?
Sun Life was founded in 1865.
How old is Sun Life?
Sun Life is 161 years old as of 2026.

Founding Story

Sun Life's origins date back to 1865, when Irish-born Montreal businessman and civic leader Mathew Hamilton Gault spearheaded an act of parliament incorporating The Sun Insurance Company of Montreal. Due to economic uncertainties surrounding Canadian Confederation, the company commenced formal underwriting in May 1871. Under the visionary stewardship of Robertson Macaulay and his son Thomas Bassett Macaulay, Sun Life pioneered the revolutionary 'unconditional policy' in 1880, eliminating restrictive travel, occupational, and residency clauses that previously voided life coverage. This consumer-centric innovation fueled rapid international expansion across the British West Indies, Latin America, Europe, and Asia. In 1919, Sun Life underwrote Canada's first employer group life policy, and by the mid-20th century, it had evolved into one of the world's most trusted mutual life underwriters, laying the foundation for its modern demutualization and global asset management leadership.

Founders

Mathew Hamilton Gault

Mathew Hamilton Gault was an Irish-born Canadian financier, industrialist, and Member of Parliament who secured the parliamentary charter for The Sun Insurance Company of Montreal in 1865, driving its initial growth.

Robertson Macaulay

Robertson Macaulay joined Sun Life in 1874, serving as secretary, managing director, and president, instituting non-forfeiture insurance principles and expanding throughout the Americas.

Thomas Bassett Macaulay

Son of Robertson Macaulay and world-renowned actuary who served as Sun Life's president from 1908 to 1934, spearheading its historic expansion across Asia, the UK, and the British Empire.

Key Milestones

1865

Chartered as The Sun Insurance Company of Montreal

Mathew Hamilton Gault secured a parliamentary charter in Montreal, beginning active underwriting operations in 1871.

Source: sunlife.com
1882

Global International Expansion

Sun Life expanded into the West Indies, China, Japan, and India, becoming a major underwriter across the British Empire.

Source: sunlife.com
1918

Sun Life Building Construction in Montreal

Began construction of the iconic Sun Life Building in downtown Montreal, which became the largest office building in the British Empire.

Source: sunlife.com
1940

Operation Fish WWII British Securities Vault

Sun Life's Montreal subterranean vaults secretly housed the United Kingdom's gold and securities reserves to fund the war effort.

Source: sunlife.com
1962

Mutualization Completed

Completed a full mutualization process, converting company ownership entirely to participating policyholders.

Source: sunlife.com
1978

Headquarters Relocation to Toronto

Moved corporate headquarters from Montreal to Toronto following political tensions surrounding Quebec language legislation.

Source: sunlife.com
1982

Landmark Acquisition of MFS Investment Management

Acquired Boston-based Massachusetts Financial Services (MFS), establishing a world-class global institutional and mutual fund engine.

Source: sunlife.com
2000

Demutualization and TSX/NYSE IPO

Demutualized and listed on the Toronto and New York Stock Exchanges, distributing shares and cash to policyholders.

Source: sunlife.com
2002

Clarica Life Insurance Megamerger ($7.3B)

Acquired Waterloo-based Clarica (formerly Mutual Life of Canada) for CAD $7.3 billion, creating Canada's largest domestic insurer at the time.

Source: sunlife.com
2014

Creation of SLC Management (Institutional Alternatives)

Consolidated institutional asset management under SLC Management, expanding into private debt, real estate, and infrastructure.

Source: sunlife.com
2019

Majority Stake in BentallGreenOak (BGO)

Merged Sun Life's real estate group with GreenOak Real Estate, forming BentallGreenOak with over CAD $60B in real estate assets.

Source: sunlife.com
2021

Kevin Strain Appointed President & CEO

Kevin Strain succeeded Dean Connor as CEO, prioritizing digital client solutions, capital-light growth, and global health leadership.

Source: sunlife.com
2022

Acquisition of DentaQuest for USD $2.475B

Acquired DentaQuest, making Sun Life the second-largest dental benefits provider in the U.S. covering 33 million members.

Source: sunlife.com
2025

AUM Surpasses CAD $1.47 Trillion

Delivered record net income of CAD $3.85 billion on CAD $28.20 billion in revenue, with exceptional fee-income stability from MFS and SLC.

Source: sunlife.com

Major Acquisitions

DentaQuest LLC

2022

Massachusetts Financial Services (MFS)

1982

Clarica Life Insurance Company

2002

BentallGreenOak (BGO)

2019

Keep researching Sun Life

Sun Life Company History FAQ

When was Sun Life founded?

Sun Life was chartered in Montreal in 1865 as The Sun Insurance Company of Montreal by Mathew Hamilton Gault.

What was Sun Life's secret role during World War II?

Under Operation Fish, Sun Life's Montreal headquarters vaults securely stored the United Kingdom's gold and marketable securities reserves during the Battle of Britain.

When did Sun Life acquire MFS Investment Management?

Sun Life acquired Boston-based MFS Investment Management in 1982, establishing a world-class active asset management franchise.

Related Strategic History

Compare founding milestones and corporate evolution

Content is for informational purposes only. Not financial advice. Data sourced from SEC filings, annual reports, and public records. See our full disclaimer and methodology.