---
ticker: "MFSB"
name: "MFS Active Core Plus Bond ETF"
url: "https://etf.net/etf/MFSB"
grade: null
no_grade_reason: "Too few comparable funds to grade fairly"
price: 24.05
price_as_of: "Oct 21, 2026, 11:30 AM ET"
methodology: "https://etf.net/methodology"
---

# MFSB: MFS Active Core Plus Bond ETF

Not graded: Too few comparable funds to grade fairly. Grades compare a fund with genuinely similar funds. This fund's comparison group currently has too few members for a fair comparison, so no letter is published.

Price $24.05, +0.02 (+0.08%) from the previous close. As of Oct 21, 2026, 11:30 AM ET.

## Top holdings

The fund holds 478 positions. These are the largest 30, by weight.

| # | Ticker | Name | Weight |
| --- | --- | --- | --- |
| 1 | — | Us Treasury N/B | 10.80% |
| 2 | — | Us Treasury N/B | 6.34% |
| 3 | — | Us Treasury N/B | 5.73% |
| 4 | — | Cash & Cash Equivalents | 4.41% |
| 5 | — | Us Treasury N/B | 3.95% |
| 6 | — | Us Treasury N/B | 1.95% |
| 7 | — | Fnma Tba 30 Yr 5.5 | 0.80% |
| 8 | — | Boston Properties Lp | 0.70% |
| 9 | — | Fnma Tba 30 Yr 3 | 0.69% |
| 10 | — | Bank of America Corp | 0.64% |
| 11 | — | JPMorgan Chase & Co | 0.59% |
| 12 | — | Aspire Mortgage Trust | 0.57% |
| 13 | — | Fnma Tba 30 Yr 4.5 | 0.55% |
| 14 | — | Highwoodsrealty Lp | 0.52% |
| 15 | — | Avolon Holdings Fndg Ltd | 0.50% |
| 16 | — | Goldman Sachs Group Inc | 0.49% |
| 17 | — | Corebridgefinancial Inc | 0.48% |
| 18 | — | Jefferiesfin Group Inc | 0.48% |
| 19 | — | Citadel Securities Globa | 0.47% |
| 20 | — | Boeing Co/The | 0.46% |
| 21 | — | Booz Allenhamilton Inc | 0.46% |
| 22 | — | Morgan Stanley | 0.44% |
| 23 | TRGP | Targa Resources Corp | 0.44% |
| 24 | — | Energy Transfer Lp | 0.43% |
| 25 | — | Lpl Holdings Inc | 0.42% |
| 26 | — | Ashtead Capital Inc | 0.42% |
| 27 | — | Plains Allamer Pipeline | 0.41% |
| 28 | — | Morgan Stanley Residential Mor | 0.41% |
| 29 | — | Octagon Investment Partners 52 | 0.41% |
| 30 | — | Arthur J Gallagher & Co | 0.41% |

Source: etf.net, https://etf.net/etf/MFSB. Please cite the page URL.