Latest Period
Q4 2025
Security Snapshot
MFS ACTIVE EXCHANGE TRADED F - CORE PLUS BD ETF (MFSB) Institutional Ownership
CUSIP: 55286W108
13F Institutional Holders and Ownership History from Q4 2024 to Q1 2026
Institutions Reporting
24
Shares (Excl. Options)
4,355,344
Price
$25.22
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- Type / Class
- Equity / CORE PLUS BD ETF
- Symbol
- MFSB
- Price per share
- $25.11
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 4,355,344
- Total reported value
- $109,819,276
- % of total 13F portfolios
- 0%
- Share change
- +2,024,191
- Value change
- +$51,038,690
- Number of holders
- 24
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- MFSB - MFS ACTIVE EXCHANGE TRADED F - CORE PLUS BD ETF is tracked under CUSIP 55286W108.
- 24 institutions reported positions in Q4 2025.
- Schedule 13D/13G significant owner rows are not currently available.
What Changed
- Holder count moved from 24 to 14 between Q4 2025 and Q1 2026.
- Reported value moved from $109,819,276 to $73,396,665.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 24 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 55286W108?
CUSIP 55286W108 identifies MFSB - MFS ACTIVE EXCHANGE TRADED F - CORE PLUS BD ETF in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 55286W108:
As of 31 Dec 2025, 24 institutional investors reported holding 4,355,344 shares of MFS ACTIVE EXCHANGE TRADED F - CORE PLUS BD ETF (MFSB).
Institutional Holders of MFS ACTIVE EXCHANGE TRADED F - CORE PLUS BD ETF (MFSB) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 2,948,850 | $73,396,665 | +$25,894,661 | $24.89 | 14 |
| 2025 Q4 | 4,355,344 | $109,819,276 | +$51,038,690 | $25.22 | 24 |
| 2025 Q3 | 2,316,384 | $58,433,505 | +$25,846,356 | $25.22 | 13 |
| 2025 Q2 | 1,292,266 | $32,144,057 | +$29,994,777 | $24.96 | 9 |
| 2025 Q1 | 86,122 | $2,136,782 | +$1,626,973 | $24.81 | 6 |
| 2024 Q4 | 20,550 | $505,275 | +$505,275 | $24.59 | 1 |