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MFS New Discovery Fund

Filed by MFS Series Trust I. What this fund reported holding in its latest quarterly NPORT-P. Positions are ordered by share of the fund rather than by size, because that is what separates a conviction from a rounding error.

Positions
50
matched to a ticker
Fund size
$2.2B
the filing's own figure
Matched value
$1B
of the positions below
As of
2026-08-31
S000000765

What it holds

Largest share of the fund first.

Company% of fundValue
CACICACI International Inc2.53%$54.1M
LGNDLigand Pharmaceuticals Inc2.33%$50M
MMSIMerit Medical Systems Inc2.10%$44.9M
CRLCharles River Laboratories International Inc1.96%$41.9M
MOG.AMoog Inc1.64%$35.1M
AEISAdvanced Energy Industries Inc1.63%$34.9M
GFLGFL Environmental Inc1.48%$31.8M
LFUSLittelfuse Inc1.48%$31.7M
DCIDonaldson Company Inc1.47%$31.6M
BOXBox Inc1.42%$30.4M
ESIElement Solutions Inc1.37%$29.4M
CCCCCC Intelligent Solutions Holdings Inc1.28%$27.4M
VSATViasat Inc1.23%$26.4M
TRNOTerreno Realty Corp1.21%$26M
TKRTimken Co1.21%$26M
MTDRMatador Resources Co1.12%$24M
SSDSimpson Manufacturing Co Inc1.11%$23.7M
BCBrunswick Corp1.07%$22.8M
SITESiteOne Landscape Supply Inc1.00%$21.4M
RHPRyman Hospitality Properties Inc0.99%$21.2M
GHGuardant Health Inc0.89%$19.1M
IBPInstalled Building Products Inc0.89%$19.1M
SMTCSemtech Corp0.86%$18.4M
PATKPatrick Industries Inc0.84%$17.9M
ARAntero Resources Corp0.80%$17.2M
DRSLeonardo DRS Inc0.78%$16.8M
PRAXPraxis Precision Medicines Inc0.78%$16.7M
ATRCAtriCure Inc0.77%$16.5M
IONSIonis Pharmaceuticals Inc0.74%$15.8M
IRTCiRhythm Holdings, Inc0.74%$15.8M
COGTCogent Biosciences Inc0.74%$15.8M
MIAXMiami International Holdings Inc0.68%$14.5M
CYTKCytokinetics Inc0.67%$14.3M
UECUranium Energy Corp0.63%$13.5M
OLLIOllie's Bargain Outlet Holdings Inc0.60%$12.9M
XPOXPO Inc0.58%$12.3M
BELFBBel Fuse Inc0.55%$11.8M
QNTQuantinuum Inc0.54%$11.6M
LGNLegence Corp0.54%$11.6M
WMSAdvanced Drainage Systems Inc0.53%$11.4M
VNOMViper Energy Inc0.52%$11.1M
NBIXNeurocrine Biosciences Inc0.49%$10.6M
KNXKnight-Swift Transportation Holdings Inc0.49%$10.4M
SFMSprouts Farmers Market Inc0.48%$10.3M
QTWOQ2 Holdings Inc0.46%$9.9M
MTSIMACOM Technology Solutions Holdings Inc0.43%$9.2M
AZTAAzenta Inc0.40%$8.6M
LTHLife Time Group Holdings, Inc0.40%$8.6M
BLFSBioLife Solutions Inc0.31%$6.7M
RAREUltragenyx Pharmaceutical Inc0.21%$4.4M

Source: NPORT-P filings, via EDGAR. Positions arrive by CUSIP, and only a CUSIP verified against a ticker is kept — so this is what we could match, not everything the fund holds, and the matched value is therefore below the fund's own size. A balance is shares where the filing says `NS` and a principal amount where it says `PA`, which is why it is not labelled shares in both cases.

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