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ETF · holdings as filed 2026-05-31

What's inside MFSB?

MFS Active Core Plus Bond ETF
Holdings
409
positions in the fund
Top 10
26%
of fund assets
Expense ratio
0.34%
net, per year
Fund size
$424M
total net assets

Top 20 holdings

RankLogoTicker / NameWeight
1
T
T 4.625 11.15.45US TREASURY N/B
7.60%
2
T
T 4.625 11.15.55US TREASURY N/B
3.77%
3
T
T 3.875 07.31.30US TREASURY N/B
3.42%
4
T
T 4.125 10.31.29US TREASURY N/B
3.16%
5
G
GVMXXSTATE ST INST US GOV MM-PREM
2.77%
6
T
T 4.625 11.15.44US TREASURY N/B
1.21%
7
T
T 4.875 08.15.45US TREASURY N/B
1.17%
8
T
T 4.5 11.15.54US TREASURY N/B
1.16%
9
F
FNCL 6 6.11FNCL 6 6/11
0.77%
10
T
T 4.25 02.15.54US TREASURY N/B
0.71%
11
N
NRZT 2025.NQM3 A1NRZT 2025-NQM3 A1
0.64%
12
F
FNCL 5.5 6.11FNCL 5.5 6/11
0.62%
13
B
BXP 5.75 01.15.35BOSTON PROPERTIES LP
0.60%
14
H
HIW 5.35 01.15.33HIGHWOODS REALTY LP
0.58%
15
S
STWD 2025.FL4 ASSTWD 2025-FL4 AS
0.58%
16
E
ELMW8 2021.1A CRRELMW8 2021-1A CRR
0.58%
17
B
BCC 2019.1A CR3BCC 2019-1A CR3
0.58%
18
L
LNCR 2025.CRE9 ASLNCR 2025-CRE9 AS
0.58%
19
M
MF1 2026.FL21 CMF1 2026-FL21 C
0.57%
20
B
BX 2026-CSMO ABX 2026-CSMO A
0.55%
Sectors
Top holdings — Bonds & Fixed Income
Your 10 largest positions in this sector
1
T
T 4.625 11.15.45US TREASURY N/B
7.60%
2
T
T 4.625 11.15.55US TREASURY N/B
3.77%
3
T
T 3.875 07.31.30US TREASURY N/B
3.42%
4
T
T 4.125 10.31.29US TREASURY N/B
3.16%
5
T
T 4.625 11.15.44US TREASURY N/B
1.21%
6
T
T 4.875 08.15.45US TREASURY N/B
1.17%
7
T
T 4.5 11.15.54US TREASURY N/B
1.16%
8
T
T 4.25 02.15.54US TREASURY N/B
0.71%
9
N
NRZT 2025.NQM3 A1NRZT 2025-NQM3 A1
0.64%
10
B
BXP 5.75 01.15.35BOSTON PROPERTIES LP
0.60%
Geography
Top holdings — United States
Your 10 largest positions in this country
1
T
T 4.625 11.15.45US TREASURY N/B
7.60%
2
T
T 4.625 11.15.55US TREASURY N/B
3.77%
3
T
T 3.875 07.31.30US TREASURY N/B
3.42%
4
T
T 4.125 10.31.29US TREASURY N/B
3.16%
5
G
GVMXXSTATE ST INST US GOV MM-PREM
2.77%
6
T
T 4.625 11.15.44US TREASURY N/B
1.21%
7
T
T 4.875 08.15.45US TREASURY N/B
1.17%
8
T
T 4.5 11.15.54US TREASURY N/B
1.16%
9
F
FNCL 6 6.11FNCL 6 6/11
0.77%
10
T
T 4.25 02.15.54US TREASURY N/B
0.71%
Geography reflects each issuer's registered business address per SEC EDGAR filings where available, falling back to the exchange or listing where no SEC filing exists — not necessarily where a company's stock is primarily listed (e.g. TSMC is classified as Taiwan even though its ADR trades on the NYSE).
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Data source: official SEC Form N-PORT filings (as of 2026-05-31); expense ratio from SEC prospectus (risk/return) filings. Fund holdings are disclosed quarterly and may reflect a 60-day reporting delay.
Informational and educational only — not investment advice.