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Massachusetts Teachers' Retirement System
The Massachusetts Teachers' Retirement System was established in 1914 to provide retirement, disability, and survivor benefits to the Commonwealth's public...
Massachusetts Teachers' Retirement System
The Massachusetts Teachers' Retirement System was established in 1914 to provide retirement, disability, and survivor benefits to the Commonwealth's public school educators. Unlike most large US pension funds, MTRS maintains no internal investment division. Its assets are statutorily pooled within the Pension Reserves Investment Trust, managed day-to-day by the PRIM Board under the Massachusetts state treasury. The Executive Director, currently Jonathan Osimo, oversees member services, benefits administration, and regulatory compliance from the system's Charlestown office. MTRS's investment posture is entirely derivative of the PRIT Fund's asset allocation. PRIT spans equities, fixed income, private equity, real estate, hedge funds, and timberland, with portfolio companies and assets held at the PRIT level rather than directly by the teacher retirement system. The PRIT real estate portfolio includes interests in assets like the Exchange Place Tower in Boston and the Blackstone BioMed Life Science Real Estate Fund in Cambridge, alongside a dedicated timberland portfolio and global completion strategies. The geographic footprint is largely US-centric, with select international exposure through PRIT's external manager roster across developed and emerging markets. MTRS serves over 90,000 active and retired educators. While AUM attributable specifically to the teachers' system is not separately disclosed — all assets are commingled within PRIT — the combined PRIT Fund exceeds $100 billion. Osimo succeeded Erika H. Glaster as Executive Director in January 2025. The system’s governance is shared with the Public Employee Retirement Administration Commission, which provides regulatory oversight, and the Massachusetts state legislature, which sets benefit structures and funding schedules. MTRS is an active participant in industry bodies including the National Council on Teacher Retirement and the Council of Institutional Investors. MTRS's defining structural feature is its atomistic relationship with its capital: the system collects contributions and disburses benefits but touches no investment management function itself. This model shifts all asset-allocation accountability to the PRIM Board, insulating the teacher pension from direct operational risk while also limiting its ability to pursue bespoke allocations or direct co-investments. The arrangement reflects a deliberate state policy choice to centralize investment management across the Commonwealth's public retirement systems rather than empower each system with independent investment authority.
General information
Firm type
Pension Fund
Year founded
1914
Location
Region
North America
Country
United States
City
Charlestown
Corporate office
Charlestown, MA, United States
Principals
Jonathan M. Osimo
Executive Director
Sector focus
Frequently asked questions
Who runs investment decisions at MTRS?
No one employed by MTRS runs investment decisions. All investment authority resides with the Massachusetts Pension Reserves Investment Management Board, which manages the PRIT Fund on behalf of MTRS and other state retirement systems. MTRS's Executive Director focuses exclusively on member services and benefits administration.
Does MTRS have a separate investment team?
No. MTRS does not employ investment professionals, CIOs, or internal analysts. Its assets are commingled within the broader PRIT structure, and all asset allocation, manager selection, and monitoring is handled by the PRIM Board's staff in Boston.
How is MTRS related to the PRIM Board?
MTRS is a statutory participant in the Pension Reserves Investment Trust, which the PRIM Board invests. The relationship is defined by Massachusetts General Laws, which direct MTRS and other state pension systems to transfer all contributory assets into PRIT for pooled investment management. MTRS retains no separate investment authority.
What asset classes is MTRS exposed to?
Through PRIT, MTRS participates in a portfolio spanning global public equities, fixed income, private equity, real estate, hedge funds, infrastructure, and timberland. Specific holdings include the Exchange Place Tower in downtown Boston and interests in the Blackstone BioMed Life Science Real Estate Fund in Cambridge, but MTRS does not hold these assets directly.
What is the AUM specifically for the teachers' pension?
MTRS does not publicly disclose a separate AUM figure. All of its investment assets reside within the commingled PRIT Fund, which totals over $100 billion. The system's assets are not segregated or reported independently by the PRIM Board in routine public disclosures.
How does MTRS's structure differ from other state teacher pensions?
Most large state teacher retirement systems — CalSTRS, Ohio STRS, Texas TRS — maintain internal investment staffs and direct allocation authority. MTRS is unusual in that it has no investment function whatsoever, a governance choice by Massachusetts to consolidate all public pension investment power within the treasury-operated PRIM Board.
Who oversees MTRS governance and benefits?
MTRS is governed by a board that includes elected teacher members, a representative of the state treasurer, and other appointed officials. The Public Employee Retirement Administration Commission provides regulatory oversight, while the Commonwealth of Massachusetts is legally responsible for ensuring the pension system remains actuarially funded and meets all benefit obligations.
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