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Holdings (Monthly) Guide ↗

MFS Municipal High Income Fund

· MFS Series Trust III
Monthly Holdings $5.6B AUM 177 positions Period Jul 2026 Filed Sep 28, 2026 EDGAR ↗ ← All Funds
All 177 New 15 Added 178 Reduced 56 Exited · Jul 2026 vs Jan 2026
# Name Ticker Since Shares Shares Δ Value Val Δ% % Port Cat
1 Black Belt Energy Gas District 09182TJX6 Jul 2026 26,150,000 NEW $27.5M — 0.49% DBT
2 Black Belt Energy Gas District 09182TJC2 Jul 2026 18,150,000 NEW $18.5M — 0.33% DBT
3 Kentucky Public Energy Authority 74440DGM0 Jul 2026 15,000,000 NEW $15.4M — 0.28% DBT
4 Black Belt Energy Gas District 09182TKW6 Jul 2026 14,385,000 NEW $14.8M — 0.27% DBT
5 City of San Antonio TX Airport System 796242WD3 Jul 2026 14,170,000 NEW $14.8M — 0.27% DBT
6 California Community Choice Financing Authority 13013JJK3 Jul 2026 11,405,000 NEW $12.1M — 0.22% DBT
7 County of Mobile AL 607341AH7 Jul 2026 12,000,000 NEW $11.5M — 0.21% DBT
8 Southern California Public Power Authority 84247PPF2 Jul 2026 10,255,000 NEW $10.7M — 0.19% DBT
9 South Carolina Jobs-Economic Development Authority 83704NAE4 Jul 2026 10,000,000 NEW $9.8M — 0.18% DBT
10 Main Street Energy, Inc. 560354AF9 Jul 2026 8,715,000 NEW $9.1M — 0.16% DBT
11 Main Street Energy, Inc. 560354AG7 Jul 2026 8,440,000 NEW $8.7M — 0.16% DBT
12 California Community Choice Financing Authority 13013JJE7 Jul 2026 7,200,000 NEW $7.7M — 0.14% DBT
13 California Community Choice Financing Authority 13013JHM1 Jul 2026 6,935,000 NEW $7.1M — 0.13% DBT
14 Albany Hospital Facility Authority 01250EAD6 Jul 2026 7,050,000 NEW $7.1M — 0.13% DBT
15 New Hampshire Business Finance Authority 63607WBW3 Jul 2026 4,125,000 NEW $6.0M — 0.11% DBT
16 Utah Charter School Finance Authority 91754T8A4 Jul 2026 5,560,000 NEW $5.4M — 0.10% DBT
17 King County Public Hospital District No. 2 494791UL8 Jul 2026 5,000,000 NEW $5.2M — 0.09% DBT
18 Kentucky Bond Development Corp. 49121HAQ6 Jul 2026 5,000,000 NEW $5.1M — 0.09% DBT
19 Jefferson Center Metropolitan District No. 2 472483AE6 Jul 2026 5,000,000 NEW $5.0M — 0.09% DBT
20 Lomond Heights Public Infrastructure District 54173BAA1 Jul 2026 4,600,000 NEW $4.6M — 0.08% DBT
21 City of Houston TX Airport System Revenue 442349KL9 Jul 2026 4,120,000 NEW $4.4M — 0.08% DBT
22 Sunbridge Stewardship District 86709HAM7 Jul 2026 4,325,000 NEW $4.2M — 0.08% DBT
23 Utah Charter School Finance Authority 91754T7Y3 Jul 2026 4,155,000 NEW $4.1M — 0.07% DBT
24 Oak Hills Local School District 671392JA7 Jul 2026 3,920,000 NEW $4.0M — 0.07% DBT
25 Mission Economic Development Corp. 605155CA6 Jul 2026 3,915,000 NEW $4.0M — 0.07% DBT
26 New Hampshire Business Finance Authority 63608TBL3 Jul 2026 10,000,000 NEW $4.0M — 0.07% DBT
27 New Hampshire Business Finance Authority 63608TBM1 Jul 2026 10,663,000 NEW $4.0M — 0.07% DBT
28 Montana Facility Finance Authority 61204KPZ8 Jul 2026 4,000,000 NEW $4.0M — 0.07% DBT
29 California Municipal Finance Authority 130483LY4 Jul 2026 4,000,000 NEW $4.0M — 0.07% DBT
30 Public Finance Authority 74449EAB9 Jul 2026 3,717,167 NEW $3.8M — 0.07% DBT
31 Public Finance Authority 74442PY25 Jul 2026 7,500,000 NEW $3.8M — 0.07% DBT
32 Trinity River Public Facility Corp. 89658RAF5 Jul 2026 3,750,000 NEW $3.8M — 0.07% DBT
33 Illinois Finance Authority 45204FW84 Jul 2026 3,540,000 NEW $3.7M — 0.07% DBT
34 Energy Southeast A Cooperative District 292723CZ4 Jul 2026 3,420,000 NEW $3.6M — 0.06% DBT
35 Public Finance Authority 74449CAD9 Jul 2026 3,668,609 NEW $3.5M — 0.06% DBT
36 Esplanade at Wellen Park Community Development District 29667QAC9 Jul 2026 3,535,000 NEW $3.5M — 0.06% DBT
37 Illinois Finance Authority 45204FW92 Jul 2026 3,260,000 NEW $3.4M — 0.06% DBT
38 Tender Option Bond Trust Receipts/Certificates 88035UKG1 Jul 2026 3,000,000 NEW $3.4M — 0.06% DBT
39 Tender Option Bond Trust Receipts/Certificates 88035UKE6 Jul 2026 3,000,000 NEW $3.4M — 0.06% DBT
40 Connecticut State Health & Educational Facilities Authority 20775DU91 Jul 2026 3,260,000 NEW $3.3M — 0.06% DBT
41 Omaha Airport Authority 681725PH4 Jul 2026 3,090,000 NEW $3.3M — 0.06% DBT
42 Indiana Finance Authority 45470YKA8 Jul 2026 3,045,000 NEW $3.2M — 0.06% DBT
43 PEFA, Inc. 70556CAL8 Jul 2026 2,995,000 NEW $3.1M — 0.06% DBT
44 Municipality of Anchorage AK 033252DN4 Jul 2026 2,900,000 NEW $3.1M — 0.06% DBT
45 Massachusetts Educational Financing Authority 57563RUK3 Jul 2026 3,215,000 NEW $3.1M — 0.06% DBT
46 Esplanade at Wellen Park Community Development District 29667QAD7 Jul 2026 3,135,000 NEW $3.1M — 0.06% DBT
47 Omaha Airport Authority 681725PJ0 Jul 2026 2,920,000 NEW $3.1M — 0.05% DBT
48 California Municipal Finance Authority 130483ME7 Jul 2026 3,000,000 NEW $3.0M — 0.05% DBT
49 Woodlands Section 9 Community Development District 97968MAD9 Jul 2026 3,000,000 NEW $2.9M — 0.05% DBT
50 California Pollution Control Financing Authority 130536RN7 Jul 2026 2,930,000 NEW $2.9M — 0.05% DBT
51 County of Lee FL Airport Revenue 523470JR4 Jul 2026 2,780,000 NEW $2.9M — 0.05% DBT
52 DeKalb County Housing Authority 240471PQ9 Jul 2026 2,935,000 NEW $2.9M — 0.05% DBT
53 Albany Hospital Facility Authority 01250EAC8 Jul 2026 2,845,000 NEW $2.9M — 0.05% DBT
54 Georgia Housing & Finance Authority 37353PVK2 Jul 2026 2,830,000 NEW $2.8M — 0.05% DBT
55 Washington State Housing Finance Commission 9397833N4 Jul 2026 2,750,000 NEW $2.8M — 0.05% DBT
56 County of Lee FL Airport Revenue 523470JQ6 Jul 2026 2,650,000 NEW $2.8M — 0.05% DBT
57 Black Belt Energy Gas District 09182TKE6 Jul 2026 2,605,000 NEW $2.7M — 0.05% DBT
58 New Hampshire Business Finance Authority 63608TBG4 Jul 2026 4,351,000 NEW $2.5M — 0.05% DBT
59 California Municipal Finance Authority 130483LG3 Jul 2026 2,500,000 NEW $2.5M — 0.04% DBT
60 Texas Municipal Gas Acquisition & Supply Corp. VI 88256FAV4 Jul 2026 2,355,000 NEW $2.5M — 0.04% DBT
61 California School Finance Authority 13058TVS6 Jul 2026 2,530,000 NEW $2.4M — 0.04% DBT
62 Public Finance Authority 74441XJV2 Jul 2026 2,480,000 NEW $2.4M — 0.04% DBT
63 California Public Finance Authority 13057GBE8 Jul 2026 2,200,000 NEW $2.2M — 0.04% DBT
64 Resort Core Public Infrastructure District No. 1 76091EAF6 Jul 2026 2,818,000 NEW $2.2M — 0.04% DBT
65 New Hampshire Business Finance Authority 63608TBQ2 Jul 2026 2,056,000 NEW $2.1M — 0.04% DBT
66 Indiana Finance Authority 45470YJZ5 Jul 2026 1,945,000 NEW $2.1M — 0.04% DBT
67 Fayetteville Public Facilities Board 31267GAD9 Jul 2026 2,025,000 NEW $2.0M — 0.04% DBT
68 California Municipal Finance Authority 13050WAJ0 Jul 2026 2,000,000 NEW $2.0M — 0.04% DBT
69 Arizona Industrial Development Authority 04052MAA8 Jul 2026 2,000,000 NEW $2.0M — 0.04% DBT
70 Panorama Public Infrastructure District No. 1 69863GAA3 Jul 2026 2,000,000 NEW $2.0M — 0.04% DBT
71 Connecticut State Health & Educational Facilities Authority 20775DU75 Jul 2026 1,930,000 NEW $1.9M — 0.03% DBT
72 Indiana Finance Authority 45470EGY5 Jul 2026 2,000,000 NEW $1.9M — 0.03% DBT
73 City of New Orleans LA 64763FM30 Jul 2026 1,810,000 NEW $1.9M — 0.03% DBT
74 Municipality of Anchorage AK 033252DP9 Jul 2026 1,835,000 NEW $1.9M — 0.03% DBT
75 Bartlett Industrial Development Board 069394AA2 Jul 2026 1,888,000 NEW $1.9M — 0.03% DBT
76 Oak Hills Local School District 671392HZ4 Jul 2026 1,845,000 NEW $1.9M — 0.03% DBT
77 Collier County Industrial Development Authority 194641BU9 Jul 2026 1,830,000 NEW $1.9M — 0.03% DBT
78 Portage County Port Authority 73567PBB1 Jul 2026 1,800,000 NEW $1.8M — 0.03% DBT
79 Virginia Small Business Financing Authority 928103BT6 Jul 2026 1,775,000 NEW $1.8M — 0.03% DBT
80 Saginaw Hospital Finance Authority 786744JR4 Jul 2026 1,735,000 NEW $1.8M — 0.03% DBT
81 Wyandotte County-Kansas City Unified Government 98267VDP5 Jul 2026 1,820,000 NEW $1.8M — 0.03% DBT
82 Resort Core Public Infrastructure District No. 1 76091EAE9 Jul 2026 2,224,000 NEW $1.7M — 0.03% DBT
83 Woodlands Section 9 Community Development District 97968MAC1 Jul 2026 1,750,000 NEW $1.7M — 0.03% DBT
84 Public Finance Authority 74442P4G7 Jul 2026 5,000,000 NEW $1.7M — 0.03% DBT
85 Michigan Strategic Fund 59471CAC3 Jul 2026 1,675,000 NEW $1.7M — 0.03% DBT
86 City of New Orleans LA 64763FM22 Jul 2026 1,600,000 NEW $1.7M — 0.03% DBT
87 Utah City West Public Infrastructure District No. 1 91735EAD2 Jul 2026 1,600,000 NEW $1.6M — 0.03% DBT
88 Florida Development Finance Corp. 34061ULN6 Jul 2026 1,810,000 NEW $1.6M — 0.03% DBT
89 Connecticut State Health & Educational Facilities Authority 20775DU83 Jul 2026 1,585,000 NEW $1.6M — 0.03% DBT
90 Massachusetts Development Finance Agency 57585BYP7 Jul 2026 1,600,000 NEW $1.6M — 0.03% DBT
91 Public Finance Authority 74442P2E4 Jul 2026 3,991,000 NEW $1.6M — 0.03% DBT
92 Massachusetts Development Finance Agency 57585BYL6 Jul 2026 1,605,000 NEW $1.5M — 0.03% DBT
93 Jordanelle Ridge Public Infrastructure District No. 3 480792AB6 Jul 2026 2,150,000 NEW $1.5M — 0.03% DBT
94 Downtown Daybreak Public Infrastructure District No. 1 26114MAB5 Jul 2026 1,500,000 NEW $1.5M — 0.03% DBT
95 Downtown Daybreak Public Infrastructure District No. 1 26114MAC3 Jul 2026 1,500,000 NEW $1.5M — 0.03% DBT
96 Wisconsin Health & Educational Facilities Authority 97712JSB0 Jul 2026 1,500,000 NEW $1.5M — 0.03% DBT
97 Resort Core Public Infrastructure District No. 1 76091EAC3 Jul 2026 1,491,000 NEW $1.5M — 0.03% DBT
98 Point Clear Club Improvement District (The) 73052SAA0 Jul 2026 1,500,000 NEW $1.5M — 0.03% DBT
99 California Statewide Communities Development Authority 13079PC27 Jul 2026 1,500,000 NEW $1.4M — 0.03% DBT
100 Sunbridge Stewardship District 86709HAL9 Jul 2026 1,465,000 NEW $1.4M — 0.03% DBT
101 Reagan Hospital District of Reagan County 755783AP2 Jul 2026 1,400,000 NEW $1.4M — 0.03% DBT
102 Miami-Dade County Industrial Development Authority 59334GAY3 Jul 2026 1,295,000 NEW $1.3M — 0.02% DBT
103 Waterset South Community Development District 94186HAQ4 Jul 2026 1,280,000 NEW $1.3M — 0.02% DBT
104 Reagan Hospital District of Reagan County 755783AQ0 Jul 2026 1,200,000 NEW $1.2M — 0.02% DBT
105 Kentucky Bond Development Corp. 49121EBE9 Jul 2026 1,250,000 NEW $1.2M — 0.02% DBT
106 Bucks County Industrial Development Authority 118612PD6 Jul 2026 1,275,000 NEW $1.2M — 0.02% DBT
107 Portage County Port Authority 73567PBA3 Jul 2026 1,140,000 NEW $1.2M — 0.02% DBT
108 California Municipal Finance Authority 13048V6W3 Jul 2026 1,110,000 NEW $1.2M — 0.02% DBT
109 Montana Facility Finance Authority 61204KPY1 Jul 2026 1,125,000 NEW $1.1M — 0.02% DBT
110 Public Finance Authority 74446DAS7 Jul 2026 1,120,000 NEW $1.1M — 0.02% DBT
111 Fayetteville Public Facilities Board 31267GAC1 Jul 2026 1,100,000 NEW $1.1M — 0.02% DBT
112 Jordanelle Ridge Public Infrastructure District No. 3 480792AA8 Jul 2026 1,100,000 NEW $1.1M — 0.02% DBT
113 Public Finance Authority 74446DAT5 Jul 2026 1,100,000 NEW $1.1M — 0.02% DBT
114 Public Finance Authority 74442EPL8 Jul 2026 1,100,000 NEW $1.0M — 0.02% DBT
115 California School Finance Authority 13058TVR8 Jul 2026 1,045,000 NEW $1.0M — 0.02% DBT
116 City of Whiting IN 96634RBA9 Jul 2026 1,000,000 NEW $1.0M — 0.02% DBT
117 Public Finance Authority 74446DAU2 Jul 2026 1,000,000 NEW $991K — 0.02% DBT
118 City of Anna TX 035713BJ4 Jul 2026 1,000,000 NEW $986K — 0.02% DBT
119 Massachusetts Development Finance Agency 57585BYM4 Jul 2026 1,000,000 NEW $974K — 0.02% DBT
120 Saginaw Hospital Finance Authority 786744JQ6 Jul 2026 870,000 NEW $898K — 0.02% DBT
121 Louisiana Public Facilities Authority 546399VY9 Jul 2026 930,000 NEW $893K — 0.02% DBT
122 Dowden Central Community Development District 26083AAD4 Jul 2026 915,000 NEW $880K — 0.02% DBT
123 North Carolina Medical Care Commission 65820YWL6 Jul 2026 885,000 NEW $869K — 0.02% DBT
124 Wyandotte County-Kansas City Unified Government 98267VDN0 Jul 2026 895,000 NEW $866K — 0.02% DBT
125 Public Finance Authority 74442EPK0 Jul 2026 880,000 NEW $843K — 0.02% DBT
126 Waterset South Community Development District 94186HAP6 Jul 2026 845,000 NEW $842K — 0.02% DBT
127 Public Finance Authority 74442EPF1 Jul 2026 850,000 NEW $841K — 0.02% DBT
128 New Jersey Higher Education Student Assistance Authority 646080ZV6 Jul 2026 815,000 NEW $793K — 0.01% DBT
129 Tender Option Bond Trust Receipts/Certificates 88035USH1 Jul 2026 675,000 NEW $759K — 0.01% DBT
130 California Municipal Finance Authority 13048V6V5 Jul 2026 750,000 NEW $758K — 0.01% DBT
131 City of Anna TX 035713BH8 Jul 2026 740,000 NEW $733K — 0.01% DBT
132 LT Ranch South Community Development District 54912TAH3 Jul 2026 715,000 NEW $709K — 0.01% DBT
133 Public Finance Authority 74442EPG9 Jul 2026 720,000 NEW $703K — 0.01% DBT
134 City of Whiting IN 96634RBB7 Jul 2026 700,000 NEW $699K — 0.01% DBT
135 Build NYC Resource Corp. 12008EYA8 Jul 2026 710,000 NEW $690K — 0.01% DBT
136 Public Finance Authority 74443DNS6 Jul 2026 675,000 NEW $654K — 0.01% DBT
137 North Carolina Medical Care Commission 65820YVZ6 Jul 2026 640,000 NEW $638K — 0.01% DBT
138 Delaware State Economic Development Authority 246372BN5 Jul 2026 665,000 NEW $638K — 0.01% DBT
139 Tender Option Bond Trust Receipts/Certificates 88035USE8 Jul 2026 575,000 NEW $635K — 0.01% DBT
140 North Carolina Medical Care Commission 65820YWA0 Jul 2026 645,000 NEW $630K — 0.01% DBT
141 Delaware State Economic Development Authority 246372BP0 Jul 2026 620,000 NEW $588K — 0.01% DBT
142 Arizona Industrial Development Authority 04052BUH5 Jul 2026 600,000 NEW $583K — 0.01% DBT
143 Louisiana Public Facilities Authority 546399VX1 Jul 2026 595,000 NEW $576K — 0.01% DBT
144 Willow Creek II Community Development District 97112BAC0 Jul 2026 590,000 NEW $573K — 0.01% DBT
145 Aquarion Water Authority 03843TCB5 Jul 2026 1,400,000 NEW $561K — 0.01% DBT
146 Willow Creek II Community Development District 97112BAD8 Jul 2026 580,000 NEW $560K — 0.01% DBT
147 LT Ranch South Community Development District 54912TAG5 Jul 2026 560,000 NEW $559K — 0.01% DBT
148 Aquarion Water Authority 03843TCA7 Jul 2026 1,300,000 NEW $555K — 0.01% DBT
149 Dowden Central Community Development District 26083AAC6 Jul 2026 530,000 NEW $511K — 0.01% DBT
150 Development Authority of Cobb County (The) 190778LA6 Jul 2026 500,000 NEW $501K — 0.01% DBT
151 Delaware State Economic Development Authority 246372BM7 Jul 2026 525,000 NEW $501K — 0.01% DBT
152 Mesa Del Sol Public Improvement District No. 1 59065CAE1 Jul 2026 500,000 NEW $496K — 0.01% DBT
153 Mesa Del Sol Public Improvement District No. 1 59065CAF8 Jul 2026 500,000 NEW $495K — 0.01% DBT
154 Aquarion Water Authority 03843TBZ3 Jul 2026 1,050,000 NEW $476K — 0.01% DBT
155 Bucks County Industrial Development Authority 118612PC8 Jul 2026 495,000 NEW $467K — 0.01% DBT
156 Build NYC Resource Corp. 12008EYB6 Jul 2026 460,000 NEW $453K — 0.01% DBT
157 Creekside Community Development District 225508AF7 Jul 2026 450,000 NEW $443K — 0.01% DBT
158 Aquarion Water Authority 03843TCG4 Jul 2026 1,480,000 NEW $428K — 0.01% DBT
159 Massachusetts Development Finance Agency 57585BTF5 Jul 2026 325,000 NEW $351K — 0.01% DBT
160 Delaware County Finance Authority 24587SAL3 Jul 2026 300,000 NEW $325K — 0.01% DBT
161 New Hampshire Business Finance Authority 644684HX3 Jul 2026 335,000 NEW $323K — 0.01% DBT
162 Miami-Dade County Industrial Development Authority 59334GAZ0 Jul 2026 320,000 NEW $316K — 0.01% DBT
163 Aquarion Water Authority 03843TCJ8 Jul 2026 1,200,000 NEW $308K — 0.01% DBT
164 Delaware County Finance Authority 24587SAK5 Jul 2026 270,000 NEW $284K — 0.01% DBT
165 Delaware County Finance Authority 24587SAM1 Jul 2026 225,000 NEW $242K — 0.00% DBT
166 Arizona Industrial Development Authority 04052BUG7 Jul 2026 250,000 NEW $238K — 0.00% DBT
167 New Hampshire Business Finance Authority 644684HW5 Jul 2026 225,000 NEW $216K — 0.00% DBT
168 Aquarion Water Authority 03843TCE9 Jul 2026 635,000 NEW $206K — 0.00% DBT
169 North Carolina Medical Care Commission 65820YWM4 Jul 2026 200,000 NEW $196K — 0.00% DBT
170 New Hampshire Business Finance Authority 644684HV7 Jul 2026 180,000 NEW $174K — 0.00% DBT
171 St Clair County Community Unit School District No. 187 Cahokia 788550PD7 Jul 2026 155,000 NEW $173K — 0.00% DBT
172 New Hampshire Business Finance Authority 644684HS4 Jul 2026 125,000 NEW $130K — 0.00% DBT
173 Public Finance Authority 74443DNR8 Jul 2026 120,000 NEW $117K — 0.00% DBT
174 New Hampshire Business Finance Authority 644684HR6 Jul 2026 110,000 NEW $115K — 0.00% DBT
175 New Hampshire Business Finance Authority 644684HT2 Jul 2026 105,000 NEW $108K — 0.00% DBT
176 New Hampshire Business Finance Authority 644684HU9 Jul 2026 110,000 NEW $106K — 0.00% DBT
177 St Clair County Community Unit School District No. 187 Cahokia 788550PE5 Jul 2026 75,000 NEW $78K — 0.00% DBT