MASSACHUSETTS FINANCIAL SERVICES CO MA
Q1 2023 Form 13-F

BOSTON, MASSACHUSETTS
CIK 0000912938 · CRD 110045 · SEC-registered investment adviser
Holdings reported by American Beacon Advisors Inc since Q2 2026
Consolidated report · includes 9 managers since Q2 2013
$292.2B Reported Value Total

MFS INVESTMENT MANAGEMENT reports 348 total accounts under management (AUM). There are 317 discretionary accounts valued at $400,692,742,313, and 31 non-discretionary accounts valued at $16,715,329,658.

Source: Form ADV filed * Note that certain holdings are exempt from Form 13-F reporting, so the AUM totals may be greater than the Form 13-F total.
SEC Registered Discretionary & Non-Discretionary
Private funds (Form ADV)
18 funds · $3.8B gross asset value
Securitized Asset Fund: $2.4B · Other: $926.3M · Hedge Fund: $398.5M
Source: Form ADV filed 2026-03-31
Reported value
$292.2B
Quarter over quarter
+3.4%
Holdings
836
Top-10 concentration
18.6%

Reports holdings for

Holdings reported by

Key People

Form ADV owners & control persons
John Malcolm Corcoran
CHIEF FINANCIAL OFFICER
Heidi Walter Hardin
DIRECTOR, EXECUTIVE VICE PRESIDENT, GENERAL COUNSEL, AND SECRETARY
Melissa Jane Kennedy
DIRECTOR
Q4 2022
Q2 2023
Go to latest
Loading 13F Metrics

Q1 2023 13F filing summary

Period of report March 31, 2023
Filed May 10, 2023
Form 13F-HR
Reported value $292.2B
Positions 836
Change in reported value +2.0%
New positions 54
Exited positions 63
Position turnover 13.0%
Top-10 concentration 18.6%

13F filings by quarter

Quarter Positions Value
Q2 2026 13F
Filed Aug 3, 2026
 997 $315.2B
Q1 2026 13F
Filed May 14, 2026
 940 $297.5B
Q4 2025 13F
Filed Jan 22, 2026
 913 $310.1B
Q3 2025 13F
Filed Oct 29, 2025
 854 $322.8B
Q2 2025 13F
Filed Aug 8, 2025
 883 $315.1B
Q1 2025 13F
Filed May 2, 2025
 879 $300.8B
Q4 2024 13F
Filed Feb 12, 2025
 872 $316.9B
Q3 2024 13F
Filed Nov 12, 2024
 844 $334.8B
Q2 2024 13F
Filed Aug 9, 2024
 859 $325.3B
Q1 2024 13F
Filed May 14, 2024
 837 $334.7B
Q4 2023 13F
Filed Feb 8, 2024
 831 $309.6B
Q3 2023 13F
Filed Nov 8, 2023
 833 $285.6B
Q2 2023 13F
Filed Aug 9, 2023
 819 $304.6B
Q1 2023 13F
Filed May 10, 2023
 836 $292.2B
Q4 2022 13F
Filed Feb 13, 2023
 844 $286.5B
Q3 2022 13F
Filed Nov 9, 2022
 847 $267.5B
Q2 2022 13F
Filed Aug 9, 2022
 846 $290.1B
Q1 2022 13F
Filed May 11, 2022
 857 $337.4B
Q4 2021 13F
Filed Feb 10, 2022
 884 $365.3B
Q3 2021 13F
Filed Nov 10, 2021
 903 $341.8B

33 earlier quarters on file — choose one from the quarter menu above.

Top 20 holdings · Q1 2023

# Holding Reported value % of portfolio
1 MSFT MICROSOFT CORP $11.4B 3.91%
2 GOOGL ALPHABET INC $6.4B 2.18%
3 AAPL APPLE INC $5.1B 1.76%
4 V VISA INC $5.1B 1.75%
5 AON AON PLC $4.9B 1.68%
6 TMO THERMO FISHER SCIENTIFIC INC $4.7B 1.6%
7 ACN ACCENTURE PLC IRELAND $4.3B 1.48%
8 LIN LINDE PLC $4.2B 1.45%
9 JPM JPMORGAN CHASE & CO $4.1B 1.42%
10 BSX BOSTON SCIENTIFIC CORP $4.0B 1.36%
11 CMCSA COMCAST CORP NEW $3.9B 1.32%
12 AMZN AMAZON COM INC $3.6B 1.25%
13 JNJ JOHNSON & JOHNSON $3.3B 1.12%
14 HON HONEYWELL INTL INC $3.1B 1.06%
15 MDT MEDTRONIC PLC $2.9B 1.0%
16 CI THE CIGNA GROUP $2.8B 0.96%
17 TXN TEXAS INSTRS INC $2.8B 0.95%
18 COP CONOCOPHILLIPS $2.6B 0.88%
19 ETN EATON CORP PLC $2.5B 0.86%
20 MA MASTERCARD INCORPORATED $2.5B 0.85%

Values as reported on the Q1 2023 Form 13F. Every position is in the holdings table below.

Loading Activities
Loading Sector Allocation
Crunching numbers
Loading Performance
Finding Potential New Buys
Building table
Loading SEC filing data
Loading Form 4 Filings
Loading 13D/G filings