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MASSACHUSETTS FINANCIAL SERVICES COMPANY

DBA: MFS INVESTMENT MANAGEMENT

BOSTON, MACRD #110045SEC #801-17352As of 2026-03-31

AUM Over Time

Discretionary
Non-Discretionary

At a Glance

Total AUM$514.05B
Discretionary$476.82B93% of AUM
Non-Discretionary$37.23B
Client Accounts355
Avg Account Size$1.45B
Employees1,244
Peak AUM$556.80BMar 2022
AUM CAGR+5.3% /yrover 25 yrs · 92 filings

AUM by Client Type

Total AUM

$514.1B

Firm Change Matrix

MetricLatest1Y3Y CAGR5Y CAGRTrend
Firm Scale
Total AUM$514.1B+8.7%+7.2%+0.7%
Discretionary AUM$476.8B+6.9%+6.0%0.3%
Non-Disc. AUM$37.2B+37.4%+30.6%+29.1%
Total Accounts355+3.2%+0.7%+2.7%
Avg Account Size$1.4B+5.3%+6.5%2.0%
Employees1k2.1%+1.2%3.7%
AUM / Employee$413M+11.0%+5.9%+4.6%
Client AUM Segments
Institutional AUM$6.7B+18.8%1.4%17.3%
Fund / Pooled AUM$507.3B+8.6%+7.3%+1.2%
Client Count Segments
Institutional533.6%+2.6%+4.3%
Pooled / Fund302+4.5%+0.3%+1.6%

Key Metrics

Total AUM$514.05B
Discretionary$476.82B
Employees1244
Client Accounts355

Contact & Location

Address

111 HUNTINGTON AVENUE
BOSTON MA 02199-7618

Phone

617-954-5000

Filing History

92 ADV Part 1 submissions

Fee Structure

% of AUM

Advisory Services

Portfolio Mgmt (Pooled)Portfolio Mgmt (Institutional)Pension Consulting
Growth

AUM Growth Rate (Annualized YoY %)

Firm Profile

Normalized 0–100 scores across six dimensions.

Discretionary vs Non-Discretionary

Discretionary

$476.8B

92.8% of AUM

Non-Discretionary

$37.2B

7.2% of AUM

Disc. mix ▼ 1.5pp vs 1 year ago

Discretionary
Non-Discretionary

Average Account Size

AUM per Employee

Headcount Over Time

Total Employees
Advisory Staff
Clients

Client Account Growth

Total Accounts
Discretionary
Non-Discretionary

Clients by Type (Latest)

Client Type Mix Over Time

Pooled Vehicles
Pension Plans
Corporations
Government
Insurance Cos.
Risk & Structure

Regulatory Disclosures

⚠ Disclosures Reportedfirst noted Feb 2004
•SRO proceeding/bar

Custody

Bank CustodyBroker-Dealer Custody

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