FundWatcher
MIOBX
MFS Income Fund
MFS Series Trust VIII

Portfolio concentration

As of April 30, 2026 · N-PORT
Holdings
525
Top-10 weight
20.24%
Effective holdings ?
149
Crowding ?
109.2

Holdings

As of April 30, 2026 · N-PORT
#SecurityTickerSharesValue% of fund
1 US TREASURY N/B — 253,875,000 $240.57M 2.93%
2 US TREASURY N/B — 198,700,000 $194.56M 2.37%
3 US TREASURY N/B — 176,000,000 $179.48M 2.19%
4 US TREASURY N/B — 164,250,000 $162.22M 1.98%
5 US TREASURY N/B — 157,000,000 $152.86M 1.86%
6 MFS Institutional Money Market Portfolio, Class A — 150,218,970 $150.23M 1.83%
7 US TREASURY N/B — 168,300,000 $148.85M 1.82%
8 US TREASURY N/B — 142,100,000 $142.80M 1.74%
9 US TREASURY N/B — 141,400,000 $142.37M 1.74%
10 US TREASURY N/B — 152,100,000 $140.31M 1.71%
11 US TREASURY N/B — 141,408,000 $132.34M 1.61%
12 US TREASURY N/B — 148,700,000 $128.78M 1.57%
13 US TREASURY N/B — 162,300,000 $96.54M 1.18%
14 US TREASURY N/B — 67,600,000 $68.24M 0.83%
15 JEFFERIES GROUP JEF 52,674,000 $50.73M 0.62%
16 US TREASURY N/B — 47,500,000 $45.61M 0.56%
17 New Residential Mortgage Loan Trust, Series 2026-NQM3, Class A1 — 39,917,050 $39.62M 0.48%
18 PMT Loan Trust, Series 2026-INV2, Class A35 — 39,467,048 $39.59M 0.48%
19 MF1 2025-FL19 LLC MF1 2025-FL19 AS — 39,130,655 $39.23M 0.48%
20 Enel SPA 7.50 10/14/2032 ENELIM 34,169,000 $38.53M 0.47%
21 Venture Global LNG Inc — 37,335,000 $38.40M 0.47%
22 STORE Master Funding LLC, Series 2025-1A, Class A2 — 38,808,433 $37.58M 0.46%
23 SANTOS FINANCE LTD REGD 144A P/P 6.87500000 — 34,136,000 $37.23M 0.45%
24 US TREASURY N/B — 43,474,000 $36.90M 0.45%
25 AUTONATION INC — 36,027,000 $36.89M 0.45%
26 PFP Ltd., Series 2024-11, Class AS PFP 35,292,589 $35.36M 0.43%
27 MF1 2025-FL19 LLC SER 2025-FL19 CL B V/R REGD 144A P/P 6.07586000 — 34,783,347 $34.91M 0.43%
28 SAMMONS FINL. GRP. 6.875% SAMMON 32,695,000 $34.62M 0.42%
29 C V6.875 PERP GG C 33,948,000 $34.47M 0.42%
30 Bain Capital Credit CLO 2021-4 Ltd — 34,000,000 $34.00M 0.41%
31 US TREASURY N/B — 33,000,000 $32.87M 0.40%
32 VORNADO REALTY LP SR UNSECURED 02/33 5.75 VNO 32,306,000 $32.36M 0.39%
33 TRANSDIGM INC SUB 4.625% 01-15-29 TDG/29 32,500,000 $32.07M 0.39%
34 Northwoods Capital XIV-B Ltd., Series 2018-14BA, Class BR — 31,844,327 $31.86M 0.39%
35 BOOZ ALLEN HAMILTON INC REGD 5.95000000 BAH 31,306,000 $31.55M 0.38%
36 MF1 LLC, Series 2025-FL20, Class C — 31,215,564 $31.32M 0.38%
37 SKX 10 07/15/33 144a SKX 28,332,826 $31.17M 0.38%
38 Provident Funding Mortgage Trust, Series 2025-5, Class A4 — 31,109,192 $31.12M 0.38%
39 Black Diamond CLO Ltd., Series 2019-2A, Class BR — 31,000,000 $31.02M 0.38%
40 Parallel Ltd., Series 2023-1A, Class A2R — 30,959,594 $30.97M 0.38%
41 NH NFAUTL 6.89 04/01/2034 NFAUTL 28,795,000 $30.54M 0.37%
42 COMM Mortgage Trust, Series 2024-CBM, Class B COMM 30,112,500 $30.49M 0.37%
43 Jane Street Group / JSG Finance Inc. — 29,337,000 $30.14M 0.37%
44 FR 5.25 01/15/31 FR 29,162,000 $29.53M 0.36%
45 Venture 43 CLO Ltd — 29,305,532 $28.94M 0.35%
46 CHARLES SCHWAB — 29,485,000 $28.77M 0.35%
47 MASSACHUSETTS ST DEV FIN AGY REVENUE — 27,730,000 $28.54M 0.35%
48 NOMURA HOLDINGS — 29,000,000 $28.33M 0.35%
49 MSRM 2026-NQM2 A1 — 28,517,166 $28.27M 0.34%
50 NOMURA HOLDINGS INC JR SUBORDINA 12/99 VAR — 27,383,000 $28.21M 0.34%
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