MFS New Discovery Fund
MFS SERIES TRUST I · 9 share classes
Fund classification
Classified from what the fund holds · as of 2026 Q2
MFS New Discovery Fund is an actively managed U.S. equity fund.
- Asset class
- Equity
- Region
- United States
- Management
- Actively managed
- Fund type
- Open-end fund
Fund profile
As filed in the prospectus · 2025 Q4
The funds investment objective is to seek capital appreciation.
The fund invests primarily in equity securities of small-capitalization companies selected through fundamental analysis for above-average earnings growth potential, with MFS employing a bottom-up approach that may also use quantitative screening. The fund may invest significantly in foreign securities and concentrate a substantial portion of assets in a single industry or sector. Because the fund's returns depend on the success of individual security selections, performance will diverge from any benchmark if those selections underperform or outperform.
| Share class | Gross | Net |
|---|---|---|
| MNDAX | 1.28% | 1.21% |
| MNDJX | 1.03% | 0.96% |
| MNDBX | 2.03% | 1.96% |
| MNDCX | 2.03% | 1.96% |
| MNDIX | 1.03% | 0.96% |
| MNDGX | 2.03% | 1.96% |
| MNDRX | 1.53% | 1.46% |
| MNDHX | 1.28% | 1.21% |
| MNDKX | 0.91% | 0.85% |
Net is what a holder pays after the adviser's contractual waiver; gross is before it. A waiver can expire.
Portfolio turnover 68.00% · as of 2025 Q4
Allocation
Asset groups · long / short shown separately, never netted · 2026 Q2
| Stocks | 100.03% |
| Cash & short-term | 4.21% |
Derivatives are shown at market value, not notional exposure.
Sector allocation
The same holdings as Allocation above, grouped by market sector instead of asset type · as of 2026 Q2
| Health Care | 24.4% |
| Industrials | 19.9% |
| Information Technology | 17.1% |
| International | 7.4% |
| 9 smaller | 31.2% |
Government, Securitized and Cash are non-corporate buckets; International is foreign holdings we don’t sector-classify, and Other is the residual (held funds, unresolved names).
Latest quarter
What changed since the fund's previous filing
Return profile
Total return as filed — price change plus distributions reinvested · trailing figures to Apr 2026
| Share class | 1-year | 3-year | 5-year | Vol | Worst fall |
|---|---|---|---|---|---|
| +30.48% | +37.65% | -1.65% | 13.94% | -15.76% | |
| +30.82% | +38.68% | -0.42% | 13.94% | -15.72% | |
| +29.55% | +34.54% | -5.29% | 13.95% | -15.92% | |
| +29.53% | +34.48% | -5.29% | 13.94% | -15.91% | |
| +30.84% | +38.63% | -0.41% | 13.95% | -15.73% | |
| +29.56% | +34.54% | -5.27% | 13.98% | -15.93% | |
| +30.21% | +36.60% | -2.83% | 13.98% | -15.77% | |
| +30.53% | +37.64% | -1.62% | 13.98% | -15.76% | |
| +31.01% | +39.19% | +0.18% | 13.98% | -15.67% |
These classes hold the same portfolio, so the 5.47pp spread over 5 years is the cost difference between them — roughly 1.09pp a year — not a difference in what they own.
May 2026 has been filed since the trailing figures were struck, so it is not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
Holdings
By % of NAV · equity positions carry filed share counts · every resolvable issuer links to its company page
| Ticker | Issuer | %NAV | Reported price | Value | Shares |
|---|---|---|---|---|---|
| MGMXX | JP Morgan US Government Money Market FundMGMXX | 4.21% | — | $90.19M | — |
| — | MFS Institutional Money Market Portfolio | 3.99% | $1.00 | $85.38M | 85.4M |
| AEIS | Advanced Energy Industries IncAEIS | 2.34% | $302.18 | $50.18M | 166.1K |
| LFUS | Littelfuse IncLFUS | 2.19% | $466.87 | $46.90M | 100.5K |
| TTMI | TTM Technologies IncTTMI | 1.99% | $173.72 | $42.63M | 245.4K |
| ESI | Element Solutions IncESI | 1.93% | $42.43 | $41.30M | 973.3K |
| LGND | Ligand Pharmaceuticals IncLGND | 1.91% | $231.96 | $40.80M | 175.9K |
| CACI | CACI International IncCACI | 1.87% | $513.51 | $40.10M | 78.1K |
| DRS | Leonardo DRS IncDRS | 1.76% | $48.76 | $37.78M | 774.9K |
| BE | Bloom Energy CorpBE | 1.67% | $285.00 | $35.83M | 125.7K |
Reported price is the fund's own reported value divided by its own reported shares at 2026-05-31 — not a live quote, and not what the fund paid.
Top 10 positions are 23.87% of net assets, top 25 44.75%, across 119 issuers.
See more of this fund's book
More positions with filed share counts, and the quarter-over-quarter change list rather than the largest few — free with an account, no card required.
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