FundWatcher
MFBFX
MFS Corporate Bond Fund
MFS Series Trust IX

Portfolio concentration

As of April 30, 2026 · N-PORT
Holdings
429
Top-10 weight
7.51%
Effective holdings ?
312
Crowding ?
96.8

Holdings

As of April 30, 2026 · N-PORT
#SecurityTickerSharesValue% of fund
1 MFS Institutional Money Market Portfolio, Class A — 77,326,532 $77.33M 1.76%
2 UBS GROUP — 35,561,000 $33.88M 0.77%
3 JPMORGAN CHASE — 37,249,000 $33.15M 0.76%
4 BOEING CO — 33,463,000 $32.61M 0.74%
5 CHARLES SCHWAB — 27,702,000 $27.03M 0.62%
6 BERMUDA GOVERNMENT OF 5% 07/15/2032 144A BERMUD 25,609,000 $25.69M 0.59%
7 MORGAN STANLEY — 25,841,000 $25.28M 0.58%
8 SUMITOMO MITSUI — 28,730,000 $25.14M 0.57%
9 UBS GROUP — 23,300,000 $23.70M 0.54%
10 CAIXABANK SA REGD V/R 144A P/P 6.84000000 — 21,476,000 $23.47M 0.54%
11 AMERICAN HOMES 4 — 22,341,000 $22.12M 0.50%
12 AIB V6.608 09/13/29 144A AIB 21,135,000 $22.08M 0.50%
13 SPIRE INC — 21,871,000 $21.66M 0.49%
14 NXP BV/NXP FDG — 21,622,000 $21.62M 0.49%
15 MARS INC — 19,768,000 $20.05M 0.46%
16 BACARDI LTD / MARTINI BV SR UNSECURED 144A 06/33 5.4 BACARD 20,190,000 $20.01M 0.46%
17 Element Fleet Management Corp. — 19,070,000 $19.88M 0.45%
18 Bank Hapoalim BM — 20,030,000 $19.80M 0.45%
19 JPMORGAN CHASE — 19,973,000 $19.75M 0.45%
20 NATL AUSTRALIABK — 21,704,000 $19.67M 0.45%
21 Jane Street Group / JSG Finance Inc. — 19,354,000 $19.46M 0.44%
22 CG 5.05 09/19/35 CGMS 20,053,000 $19.38M 0.44%
23 MXPRLL 7.75 07/15/30 144A MXPRLL 18,665,000 $19.29M 0.44%
24 Boston Gas Co — 18,170,000 $19.02M 0.43%
25 SCIH SALT HOLDINGS INC SR SECURED 144A 05/28 4.875 MORTON 18,888,000 $18.70M 0.43%
26 PIONEER NATURAL — 20,530,000 $18.54M 0.42%
27 Flutter Treasury DAC — 18,564,000 $18.49M 0.42%
28 HIGHWOODS REALTY — 18,586,000 $18.41M 0.42%
29 AMAZON.COM INC — 18,459,000 $18.20M 0.42%
30 STORE CAPITAL LLC SR UNSECURED 12/31 2.7 STOR 20,677,000 $18.14M 0.41%
31 ICON Investments Six DAC — 17,938,000 $18.07M 0.41%
32 JPMORGAN CHASE — 18,465,000 $18.00M 0.41%
33 NSTAU 6.125 04/11/33 144A NSTAU 17,231,000 $17.86M 0.41%
34 SMBC AVIATION CAPITAL FI REGD 144A P/P 5.30000000 SMBCAC 17,593,000 $17.84M 0.41%
35 MUFG V5.188 09/12/36 MUFG 17,847,000 $17.73M 0.40%
36 PRMWCN 4.375 04/30/29 144a PRMWCN 18,150,000 $17.71M 0.40%
37 Citadel Securities Global Holdings LLC — 17,888,000 $17.65M 0.40%
38 TARGA RESOURCES — 20,769,000 $17.47M 0.40%
39 US TREASURY N/B — 18,081,000 $17.41M 0.40%
40 TransDigm, Inc. — 16,762,000 $17.28M 0.39%
41 CHENIERE ENERGYP — 16,893,000 $17.24M 0.39%
42 EASTERN ENERGY — 18,259,000 $17.21M 0.39%
43 US TREASURY N/B — 16,964,000 $17.03M 0.39%
44 AMERICAN INTERNA — 16,737,000 $16.93M 0.39%
45 DANSKE BANK A/S — 16,262,000 $16.71M 0.38%
46 FERGUSON ENTERPR — 16,803,000 $16.70M 0.38%
47 SUNOCO LP SR UNSECURED 144A 08/32 6.625 SUN 16,278,000 $16.64M 0.38%
48 NORDEA BANK ABP — 16,788,000 $16.60M 0.38%
49 JERSEY CENTRAL PWR + LT SR UNSECURED 144A 03/32 2.75 FE 18,451,000 $16.58M 0.38%
50 ARDN Mortgage Trust, Series 2025-ARCP, Class A — 16,374,000 $16.40M 0.37%
1 / 9 Next ›

Machine-readable: JSON · Markdown. Programmatic access via the agent surface.