0001752724-20-117355.txt : 20200612
0001752724-20-117355.hdr.sgml : 20200612
20200612094036
ACCESSION NUMBER: 0001752724-20-117355
CONFORMED SUBMISSION TYPE: N-CEN
PUBLIC DOCUMENT COUNT: 2
CONFORMED PERIOD OF REPORT: 20200331
FILED AS OF DATE: 20200612
DATE AS OF CHANGE: 20200612
EFFECTIVENESS DATE: 20200612
FILER:
COMPANY DATA:
COMPANY CONFORMED NAME: MFS MUNICIPAL SERIES TRUST
CENTRAL INDEX KEY: 0000751656
IRS NUMBER: 000000000
STATE OF INCORPORATION: MA
FISCAL YEAR END: 0331
FILING VALUES:
FORM TYPE: N-CEN
SEC ACT: 1940 Act
SEC FILE NUMBER: 811-04096
FILM NUMBER: 20959112
BUSINESS ADDRESS:
STREET 1: 111 HUNTINGTON AVENUE
STREET 2: 24TH FLOOR
CITY: BOSTON
STATE: MA
ZIP: 02199
BUSINESS PHONE: 18006372929
MAIL ADDRESS:
STREET 1: 111 HUNTINGTON AVENUE
STREET 2: 24TH FLOOR
CITY: BOSTON
STATE: MA
ZIP: 02199
FORMER COMPANY:
FORMER CONFORMED NAME: MFS MANAGED MULTI STATE MUNICIPAL BOND TRUST
DATE OF NAME CHANGE: 19920703
FORMER COMPANY:
FORMER CONFORMED NAME: MFS MANAGED MULTI STATE TAX EXEMPT TRUST
DATE OF NAME CHANGE: 19890410
0000751656
S000002521
MFS Alabama Municipal Bond Fund
C000006957
A
MFALX
C000006958
B
MBABX
C000169758
I
MLALX
C000194226
R6
MPOLX
C000194227
T
0000751656
S000002522
MFS New York Municipal Bond Fund
C000006959
A
MSNYX
C000006960
B
MBNYX
C000006961
C
MCNYX
C000169759
I
MNYLX
C000194228
R6
MPNYX
C000194229
T
0000751656
S000002523
MFS North Carolina Municipal Bond Fund
C000006962
A
MSNCX
C000006963
B
MBNCX
C000006964
C
MCNCX
C000169760
I
MNCLX
C000194230
R6
MPNCX
C000194231
T
0000751656
S000002524
MFS Pennsylvania Municipal Bond Fund
C000006965
A
MFPAX
C000006966
B
MBPAX
C000169761
I
MPALX
C000194232
R6
MPPAX
C000194233
T
0000751656
S000002525
MFS South Carolina Municipal Bond Fund
C000006967
A
MFSCX
C000006968
B
MBSCX
C000169762
I
MTSCX
C000194234
R6
MPOCX
C000194235
T
0000751656
S000002526
MFS Tennessee Municipal Bond Fund
C000006969
A
MSTNX
C000006970
B
MBTNX
C000169763
I
MTNLX
C000194236
R6
MPONX
C000194237
T
0000751656
S000002527
MFS Virginia Municipal Bond Fund
C000006971
A
MSVAX
C000006972
B
MBVAX
C000006973
C
MVACX
C000169764
I
MIVAX
C000194238
R6
MPVOX
C000194239
T
0000751656
S000002528
MFS West Virginia Municipal Bond Fund
C000006974
A
MFWVX
C000006975
B
MBWVX
C000169765
I
MWVIX
C000194240
R6
MPWVX
C000194241
T
0000751656
S000002529
MFS Arkansas Municipal Bond Fund
C000006976
A
MFARX
C000006977
B
MBARX
C000169766
I
MARLX
C000194242
R6
MPRAX
C000194243
T
0000751656
S000002530
MFS California Municipal Bond Fund
C000006978
A
MCFTX
C000006979
B
MBCAX
C000006980
C
MCCAX
C000169767
I
MCAVX
C000194244
R6
MPOAX
C000194245
T
0000751656
S000002532
MFS Georgia Municipal Bond Fund
C000006983
A
MMGAX
C000006984
B
MBGAX
C000169768
I
MGATX
C000194246
R6
MPGOX
C000194247
T
0000751656
S000002533
MFS Maryland Municipal Bond Fund
C000006985
A
MFSMX
C000006986
B
MBMDX
C000169769
I
MMDIX
C000194248
T
C000194249
R6
MPMDX
0000751656
S000002534
MFS Massachusetts Municipal Bond Fund
C000006987
A
MFSSX
C000006988
B
MBMAX
C000169770
I
MTALX
C000194250
R6
MPMAX
C000194251
T
0000751656
S000002535
MFS Mississippi Municipal Bond Fund
C000006989
A
MISSX
C000006990
B
MBMSX
C000169771
I
MMSTX
C000194252
R6
MPMSX
C000194253
T
0000751656
S000002536
MFS Municipal Income Fund
C000006991
A
MFIAX
C000006992
B
MMIBX
C000006993
C
MMICX
C000042676
A1
MMIDX
C000042677
B1
MMIGX
C000105400
I
MIMIX
C000194254
R6
MPMNX
C000194255
T
N-CEN
1
primary_doc.xml
X0201
N-CEN
LIVE
0000751656
XXXXXXXX
811-04096
true
true
false
N-1A
true
MFS MUNICIPAL SERIES TRUST
811-04096
0000751656
5493001Q9KE7H84Z5340
111 Huntington Avenue
Boston
02199
US-MA
US
617-954-5000
DST Systems,Inc
333 West 11thStreet
Kansas City
64105
18164351000
Technology Vendor
JPMorgan Chase
270 Park Avenue
New York
10017
12122706000
Custodian record
Institutional Shareholder Services Inc
702 King Farm Boulevard Suite 400
Rockville
20850
13015560500
Proxy voting administrator
MFS Service Center Inc.
100 Hancock Street
North Quincy
02171
16179545000
Transfer agency record
Iron Mountain Inc
1 Federal Street
Boston
02110
18008994766
Storage Vendor
Charles River Development
700 District Avenue
Burlington
01803
17812380099
Investment related records
The Depository Trust Company
55 Water Street
New York
10041
12128551000
DTC
MFS Fund Distributors,Inc
111 Huntington Avenue
Boston
02199
16179545000
Principal underwriter record
Ropes&Gray
800 Boylston Street
Boston
02199
16179517000
Counsel record
Autonomy Corporation Limited
1140 Enterprise Way
Sunnyvale
94089
441223448000
Storage Vendor
TerraNua U.S. Corp d.b.a. My Compliance Office
535 5th Avenue 4th floor
New York
10017
18669512280
Personal Trading System
Massachusetts Financial Services Company
111 Huntington Avenue
Boston
02199
16179545000
Investment adviser record
N
N
N-1A
15
Y
Clarence Otis, Jr.
N/A
N
James W. Kilman, Jr.
N/A
N
Robin A. Stelmach
N/A
Y
John A. Caroselli
N/A
N
Robert J. Manning
004646484
Y
Steven E. Buller
N/A
N
Maureen R. Goldfarb
N/A
N
Laurie J. Thomsen
N/A
N
Maryanne L. Roepke
N/A
N
John P. Kavanaugh
N/A
N
Peter D. Jones
N/A
N
Martin J. Wolin
004331075
111 Huntington Avenue
Boston
02199
XXXXXX
N
N
N
N
N
N
N
MFS FUND DISTRIBUTORS, INC.
8-45321
000031052
N/A
Y
N
DELOITTE & TOUCHE LLP
34
N/A
N
N
N
N
N
N
MFS Georgia Municipal Bond Fund
S000002532
D6T6CE9XSLIZ37D0OB07
N
4
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 22d-1 (17 CFR 270.22d-1)
Rule 32a-4 (17 CFR 270.32a-4)
Rule 12d1-1 (17 CFR 270.12d1-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
IHS Markit
549300HLPTRASHS0E726
GB
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
964.16000000
964.16000000
First Horizon Advisors, Inc.
8-35061
000017117
COOWI3L2W9TPYR3WJX37
3042992.40000000
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
3984109.75000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
11746470.63000000
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
7466861.50000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
5946302.28000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
5091570.76000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
11424249.21999999
NATIONAL FINANCIAL SERVICES LLC
8-26740-1
000013041
549300JRHF1MHHWUAW04
2474195.00000000
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
3907603.50000000
Raymond James & Associates, Inc.
8-10999
000000705
U4ONQX15J3RO8XCKE979
9047949.00000000
80795154.34999999
N
109824883.53
Uncommitted
200000000.00000000
N
Uncommitted
100000000.00000000
N
Committed
1250000000.00000000
N
N
N
N
MFS New York Municipal Bond Fund
S000002522
VBDLXONWHCNFU9SKO405
N
5
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 32a-4 (17 CFR 270.32a-4)
Rule 22d-1 (17 CFR 270.22d-1)
Rule 12d1-1 (17 CFR 270.12d1-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
IHS Markit
549300HLPTRASHS0E726
GB
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
1858.40000000
1858.40000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
21689526.15000000
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
16158641.46999999
NATIONAL FINANCIAL SERVICES LLC
8-26740-1
000013041
549300JRHF1MHHWUAW04
15710687.60000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
13147783.23000000
Samuel A. Ramirez & Company, Inc.
8-19014
000006963
254900CBKVW7O2ENQA21
5986620.00000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
29085112.78000000
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
15826774.65000000
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
4886893.70000000
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
9298805.08999999
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
12989606.05000000
161611650.07999998
N
273030264.25
Committed
1250000000.00000000
N
Uncommitted
100000000.00000000
N
Uncommitted
200000000.00000000
N
N
N
N
MFS California Municipal Bond Fund
S000002530
HJJE4BDRSB2UZB44II16
N
5
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 32a-4 (17 CFR 270.32a-4)
Rule 12d1-1 (17 CFR 270.12d1-1)
Rule 22d-1 (17 CFR 270.22d-1)
Rule 17a-7 (17 CFR 270.17a-7)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
IHS Markit
549300HLPTRASHS0E726
GB
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
4217.28000000
4217.28000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
41356909.07000000
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
10427658.40000000
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
19555016.80000000
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
26886416.82000000
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
49821265.92000000
Robert W. Baird & Co.
8-00497
000008158
549300TWB23RB5LVZG34
10095334.50000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
16535271.41000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
25300922.66999999
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
20925203.55999999
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
96155539.90999999
348464368.75
N
519290522.92
Uncommitted
200000000.00000000
N
Uncommitted
100000000.00000000
N
Committed
1250000000.00000000
N
N
N
N
MFS Maryland Municipal Bond Fund
S000002533
NDK106CDS4LPS37O1K93
N
4
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 32a-4 (17 CFR 270.32a-4)
Rule 22d-1 (17 CFR 270.22d-1)
Rule 12d1-1 (17 CFR 270.12d1-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
IHS Markit
549300HLPTRASHS0E726
GB
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
923.68000000
923.68000000
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
4221896.80000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
4687828.47000000
BANK OF NEW YORK MELLON CORP.
8-35255
000017454
WFLLPEPC7FZXENRZV188
5989327.00000000
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
3077692.63999999
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
13570649.84000000
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
7766135.71999999
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
2749605.10000000
NATIONAL FINANCIAL SERVICES LLC
8-26740-1
000013041
549300JRHF1MHHWUAW04
5000000.00000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
4745016.12000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
4399332.08000000
65952804.71999998
N
101232734.83
Uncommitted
100000000.00000000
N
Uncommitted
200000000.00000000
N
Committed
1250000000.00000000
N
N
N
N
MFS Massachusetts Municipal Bond Fund
S000002534
MI3C3CKY7VNRDNDWCO87
N
4
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 32a-4 (17 CFR 270.32a-4)
Rule 22d-1 (17 CFR 270.22d-1)
Rule 12d1-1 (17 CFR 270.12d1-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
IHS Markit
549300HLPTRASHS0E726
GB
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
1766.40000000
1766.40000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
22823582.93000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
18516925.03000000
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
20721480.07999999
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
20444914.80999999
BANK OF NEW YORK MELLON CORP.
8-35255
000017454
WFLLPEPC7FZXENRZV188
23104582.30000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
36850767.77000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
31474182.52000000
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
8016424.35999999
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
19340050.80000000
Janney Montgomery Scott LLC
8-00462
000000463
549300QQRY1JCFQHYS08
9797940.09999999
236320290.91999996
N
340153784.52
Uncommitted
200000000.00000000
N
Committed
1250000000.00000000
N
Uncommitted
100000000.00000000
N
N
N
N
MFS North Carolina Municipal Bond Fund
S000002523
Y3HMANBD6AL3XSXU2W16
N
5
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 32a-4 (17 CFR 270.32a-4)
Rule 12d1-1 (17 CFR 270.12d1-1)
Rule 22d-1 (17 CFR 270.22d-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
IHS Markit
549300HLPTRASHS0E726
GB
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
4651.84000000
4651.84000000
BANK OF NEW YORK MELLON CORP.
8-35255
000017454
WFLLPEPC7FZXENRZV188
13273031.50000000
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
29031704.99000000
Robert W. Baird & Co.
8-00497
000008158
549300TWB23RB5LVZG34
13637292.75000000
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
43452885.10000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
39204309.20000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
19739247.41000000
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
14830452.59000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
51065786.38000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
10418466.53999999
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
13219332.40000000
281323593.80000001
N
459630695.82
Uncommitted
200000000.00000000
N
Committed
1250000000.00000000
N
Uncommitted
100000000.00000000
N
N
N
N
MFS Virginia Municipal Bond Fund
S000002527
ZBE08E46OUHKF4OZUH15
N
5
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 22d-1 (17 CFR 270.22d-1)
Rule 12d1-1 (17 CFR 270.12d1-1)
Rule 32a-4 (17 CFR 270.32a-4)
Rule 17a-7 (17 CFR 270.17a-7)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
IHS Markit
549300HLPTRASHS0E726
GB
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
1972.48000000
1972.48000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
19516687.91000000
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
8398428.09999999
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
14079623.45999999
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
5300302.89999999
BANK OF NEW YORK MELLON CORP.
8-35255
000017454
WFLLPEPC7FZXENRZV188
6006647.54999999
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
36811684.71999999
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
15002222.13000000
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
24033227.26000000
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
5420463.82000000
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
11537662.69999999
172323540.03000003
N
332942438.68
Committed
1250000000.00000000
N
Uncommitted
100000000.00000000
N
Uncommitted
200000000.00000000
N
N
N
N
MFS Alabama Municipal Bond Fund
S000002521
M7CC6KLX5LX4YG4Z0676
N
4
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 12d1-1 (17 CFR 270.12d1-1)
Rule 32a-4 (17 CFR 270.32a-4)
Rule 22d-1 (17 CFR 270.22d-1)
Rule 17a-7 (17 CFR 270.17a-7)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
IHS Markit
549300HLPTRASHS0E726
GB
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
666.80000000
666.80000000
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
4944612.60000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
6195905.65000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
1826558.31000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
6437001.75999999
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
6237033.82000000
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
3188036.50000000
Hilltop Securities Inc.
8-45123
000006220
549300IXU82PMU6XZT45
1882578.65000000
Stifel, Nicolaus & Company, Incorporated
8-01447
000000793
5WUVMA08EYG4KEUPW589
5708707.84999999
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
1616516.77000000
Janney Montgomery Scott LLC
8-00462
000000463
549300QQRY1JCFQHYS08
3760913.20000000
52699456.16000002
N
75422440.76
Committed
1250000000.00000000
N
Uncommitted
100000000.00000000
N
Uncommitted
200000000.00000000
N
N
N
N
MFS Pennsylvania Municipal Bond Fund
S000002524
8MG4769ZL455HON5LD92
N
4
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 12d1-1 (17 CFR 270.12d1-1)
Rule 22d-1 (17 CFR 270.22d-1)
Rule 32a-4 (17 CFR 270.32a-4)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
IHS Markit
549300HLPTRASHS0E726
GB
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
772.80000000
772.80000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
5730420.85999999
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
15606018.70999999
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
7052691.91000000
BANK OF NEW YORK MELLON CORP.
8-35255
000017454
WFLLPEPC7FZXENRZV188
4277545.00000000
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
2629776.25000000
Deutsche Bank Securities Inc.
8-17822
000002525
9J6MBOOO7BECTDTUZW19
5362589.75000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
7642481.87000000
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
3884326.83000000
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
2484991.04000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
5734347.20000000
63170333.17000000
N
153432058.23
Committed
1250000000.00000000
N
Uncommitted
200000000.00000000
N
Uncommitted
100000000.00000000
N
N
N
N
MFS South Carolina Municipal Bond Fund
S000002525
08HGTHG281BFQRFCD148
N
4
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 32a-4 (17 CFR 270.32a-4)
Rule 22d-1 (17 CFR 270.22d-1)
Rule 12d1-1 (17 CFR 270.12d1-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
IHS Markit
549300HLPTRASHS0E726
GB
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
732.32000000
732.32000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
16999583.34999999
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
12764558.90000000
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
7827125.40000000
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
7724117.88000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
11204894.64000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
5630880.37999999
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
13111413.19999999
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
15199811.30000000
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
9529510.76999999
BANK OF NEW YORK MELLON CORP.
8-35255
000017454
WFLLPEPC7FZXENRZV188
7610230.69999999
130622507.4
N
217500270.02
Uncommitted
100000000.00000000
N
Uncommitted
200000000.00000000
N
Committed
1250000000.00000000
N
N
N
N
MFS Tennessee Municipal Bond Fund
S000002526
8XTSH5JIRK5W5OS40M06
N
4
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 22d-1 (17 CFR 270.22d-1)
Rule 32a-4 (17 CFR 270.32a-4)
Rule 12d1-1 (17 CFR 270.12d1-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
IHS Markit
549300HLPTRASHS0E726
GB
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
434.24000000
434.24000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
6545504.72000000
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
2502507.65000000
Raymond James & Associates, Inc.
8-10999
000000705
U4ONQX15J3RO8XCKE979
5072989.75000000
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
4566799.67000000
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
2031549.68000000
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
2395960.54000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
8597501.73000000
BANK OF NEW YORK MELLON CORP.
8-35255
000017454
WFLLPEPC7FZXENRZV188
8149522.50000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
6090171.16000000
First Horizon Advisors, Inc.
8-35061
000017117
COOWI3L2W9TPYR3WJX37
3501350.50000000
59037099.29999999
N
99866217.78
Uncommitted
200000000.00000000
N
Uncommitted
100000000.00000000
N
Committed
1250000000.00000000
N
N
N
N
MFS Municipal Income Fund
S000002536
EX1INFNFQVRO3N97PT04
N
7
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 12d1-1 (17 CFR 270.12d1-1)
Rule 32a-4 (17 CFR 270.32a-4)
Rule 22d-1 (17 CFR 270.22d-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
IHS Markit
549300HLPTRASHS0E726
GB
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
0
Goldman Sachs & Co. LLC
8-00129
000000361
FOR8UP27PHTHYVLBNG30
255912206.04000002
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
177918668.55000001
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
523190108.75000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
285829634.39999998
BANK OF NEW YORK MELLON CORP.
8-35255
000017454
WFLLPEPC7FZXENRZV188
108287173.59999995
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
90067111.29999999
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
349035050.76999998
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
77491249.79000000
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
113895630.00000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
464562757.00000000
2638012551.86999890
N
4326664718.97
Committed
1250000000.00000000
N
Uncommitted
100000000.00000000
N
Uncommitted
200000000.00000000
N
N
N
N
MFS West Virginia Municipal Bond Fund
S000002528
W36WJXZ97WII7K64W483
N
4
0
0
N/A
Y
N
N
N
N/A
N/A
N/A
Rule 12d1-1 (17 CFR 270.12d1-1)
Rule 32a-4 (17 CFR 270.32a-4)
Rule 22d-1 (17 CFR 270.22d-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
IHS Markit
549300HLPTRASHS0E726
GB
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
257.60000000
257.60000000
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
3065191.45000000
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
6711752.01999999
RBC Capital Markets, LLC
8-45411
000031194
549300LCO2FLSSVFFR64
1405618.21
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
4263019.76000000
Keybanc Capital Markets Inc.
8-30177
000000566
2EQWV0180Z211YVAD813
3327677.50000000
BANK OF NEW YORK MELLON CORP.
8-35255
000017454
WFLLPEPC7FZXENRZV188
3916297.50000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
1654426.7
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
3500324.93000000
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
1694303.25000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
7750478.43999999
43223910.11000001
N
108478014.45
Uncommitted
200000000.00000000
N
Uncommitted
100000000.00000000
N
Committed
1250000000.00000000
N
N
N
N
MFS Mississippi Municipal Bond Fund
S000002535
4GAB1OTSRRZ89GG72J95
N
4
0
0
N/A
Y
N
N
N
N/A
N/A
N/A
Rule 12d1-1 (17 CFR 270.12d1-1)
Rule 32a-4 (17 CFR 270.32a-4)
Rule 22d-1 (17 CFR 270.22d-1)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
IHS Markit
549300HLPTRASHS0E726
GB
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
415.84000000
415.84000000
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
4202512.78000000
First Horizon Advisors, Inc.
8-35061
000017117
COOWI3L2W9TPYR3WJX37
1791806.40000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
12739240.26000000
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
2157256.50000000
Robert W. Baird & Co.
8-00497
000008158
549300TWB23RB5LVZG34
1628920.65000000
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
3473488.95000000
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
3585443.84999999
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
7234397.39000000
Raymond James & Associates, Inc.
8-10999
000000705
U4ONQX15J3RO8XCKE979
7519705.59999999
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
4753823.51000000
59468563.71000002
N
95615124.38
Committed
1250000000.00000000
N
Uncommitted
200000000.00000000
N
Uncommitted
100000000.00000000
N
N
N
N
MFS Arkansas Municipal Bond Fund
S000002529
IBCRCKLUQF4H2CCTDD70
N
4
0
0
N/A
N
N
N
N
N/A
N/A
N/A
Rule 22d-1 (17 CFR 270.22d-1)
Rule 12d1-1 (17 CFR 270.12d1-1)
Rule 32a-4 (17 CFR 270.32a-4)
Rule 17a-7 (17 CFR 270.17a-7)
Y
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES COMPANY
801-17352
000110045
1G3OSH3GLGJ7X1JC5I61
N
MFS SERVICE CENTER, INC.
84-1316
N/A
Y
N
N
Refinitiv U.S. Holdings Inc.
5490300NF240HXJO7N016
N
IHS Markit
549300HLPTRASHS0E726
GB
N
PricingDirect Inc.
549300WIC0TOJ7N7GD54
N
ICE Data Pricing & Reference Data, LLC
000110037
CRD
N
N
JPMORGAN CHASE BANK
7H6GLXDRUGQFU57RNE97
N
N
Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1))
N
MFS Service Center, Inc.
N/A
Y
N
N
MASSACHUSETTS FINANCIAL SERVICES
1G3OSH3GLGJ7X1JC5I61
Y
N
N
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
658.72000000
658.72000000
Morgan Stanley & Co. LLC
8-15869
000008209
9R7GPTSO7KV3UQJZQ078
6533347.60999999
Citigroup Global Markets Inc.
8-8177
000007059
MBNUM2BPBDO7JBLYG310
3420211.15000000
BANK OF AMERICA CORP
8-07221
000007691
9DJT3UXIJIZJI4WXO774
8296294.56000000
First Horizon Advisors, Inc.
8-35061
000017117
COOWI3L2W9TPYR3WJX37
2756325.00000000
Stephens Inc.
8-01927
000003496
213800LH6T9XDYZCA534
4485376.40000000
J.P. Morgan Securities LLC
8-35008
000000079
ZBUT11V806EZRVTWT807
7478118.16000000
Wells Fargo Securities, LLC
8-65876
000126292
VYVVCKR63DVZZN70PB21
4130116.75000000
Jefferies LLC
8-15074
000002347
58PU97L1C0WSRCWADL48
3089077.11000000
Barclays Capital, Inc.
8-41342
000019714
AC28XWWI3WIBK2824319
2593749.45000000
Crews & Associates, Inc.
8-24075
000008052
5493001BWSV3E82LZ446
4393200.00000000
62074667.03000000
N
156733201.46
Uncommitted
200000000.00000000
N
Uncommitted
100000000.00000000
N
Committed
1250000000.00000000
N
N
N
N
false
false
true
false
false
false
INTERNAL CONTROL RPT
2
Audit_letter.txt
AUDIT LETTER
REPORT OF INDEPENDENT REGISTERED PUBLIC
ACCOUNTING FIRM
To the Board of Trustees of MFS Municipal Series Trust
and the Shareholders of MFS Alabama Municipal Bond
Fund, MFS Arkansas Municipal Bond Fund, MFS California
Municipal Bond Fund, MFS Georgia Municipal Bond Fund,
MFS Maryland Municipal Bond Fund, MFS Massachusetts
Municipal Bond Fund, MFS Mississippi Municipal Bond
Fund, MFS New York Municipal Bond Fund, MFS North
Carolina Municipal Bond Fund, MFS Pennsylvania
Municipal Bond Fund, MFS South Carolina Municipal Bond
Fund, MFS Tennessee Municipal Bond Fund, MFS Virginia
Municipal Bond Fund, MFS West Virginia Municipal Bond
Fund and MFS Municipal Income Fund:
In planning and performing our audits of the financial
statements of MFS Alabama Municipal Bond Fund, MFS
Arkansas Municipal Bond Fund, MFS California Municipal
Bond Fund, MFS Georgia Municipal Bond Fund, MFS
Maryland Municipal Bond Fund, MFS Massachusetts
Municipal Bond Fund, MFS Mississippi Municipal Bond
Fund, MFS New York Municipal Bond Fund, MFS North
Carolina Municipal Bond Fund, MFS Pennsylvania
Municipal Bond Fund, MFS South Carolina Municipal Bond
Fund, MFS Tennessee Municipal Bond Fund, MFS Virginia
Municipal Bond Fund, MFS West Virginia Municipal Bond
Fund and MFS Municipal Income Fund (each a series of
MFS Municipal Series Trust) (the "Funds") as of and for
the year ended March 31, 2020, in accordance with the
standards of the Public Company Accounting Oversight
Board (United States) (PCAOB), we considered the Funds'
internal control over financial reporting, including controls
over safeguarding securities, as a basis for designing our
auditing procedures for the purpose of expressing our
opinions on the financial statements and to comply with
the requirements of Form N-CEN, but not for the purpose
of expressing an opinion on the effectiveness of the
Funds' internal control over financial
reporting. Accordingly, we express no such opinion.
The management of the Funds is responsible for
establishing and maintaining effective internal control
over financial reporting. In fulfilling this responsibility,
estimates and judgments by management are required to
assess the expected benefits and related costs of
controls. A fund's internal control over financial reporting
is a process designed to provide reasonable assurance
regarding the reliability of financial reporting and the
preparation of financial statements for external purposes
in accordance with generally accepted accounting
principles. A fund's internal control over financial
reporting includes those policies and procedures that (1)
pertain to the maintenance of records that, in reasonable
detail, accurately and fairly reflect the transactions and
dispositions of the assets of the fund; (2) provide
reasonable assurance that transactions are recorded as
necessary to permit preparation of financial statements in
accordance with generally accepted accounting principles,
and that receipts and expenditures of the fund are being
made only in accordance with authorizations of
management of the fund and trustees of the trust; and
(3) provide reasonable assurance regarding prevention or
timely detection of unauthorized acquisition, use, or
disposition of a fund's assets that could have a material
effect on the financial statements.
Because of its inherent limitations, internal control over
financial reporting may not prevent or detect
misstatements. Also, projections of any evaluation of
effectiveness to future periods are subject to the risk that
controls may become inadequate because of changes in
conditions or that the degree of compliance with the
policies or procedures may deteriorate.
A deficiency in internal control over financial reporting
exists when the design or operation of a control does not
allow management or employees, in the normal course of
performing their assigned functions, to prevent or detect
misstatements on a timely basis. A material weakness is
a deficiency, or a combination of deficiencies, in internal
control over financial reporting, such that there is a
reasonable possibility that a material misstatement of a
fund's annual or interim financial statements will not be
prevented or detected on a timely basis.
Our consideration of the Funds' internal control over
financial reporting was for the limited purpose described
in the first paragraph and would not necessarily disclose
all deficiencies in internal control that might be material
weaknesses under standards established by the
PCAOB. However, we noted no deficiencies in the Funds'
internal control over financial reporting and their
operation, including controls for safeguarding securities,
that we consider to be a material weakness, as defined
above, as of March 31, 2020.
This report is intended solely for the information and use
of management, the Board of Trustees of MFS Municipal
Series Trust and the Securities and Exchange Commission
and is not intended to be and should not be used by
anyone other than these specified parties.
DELOITTE & TOUCHE LLP
Boston, Massachusetts
May 15, 2020