account_balance
Investment manager · 13F filer · SEC CIK 1803227
Mattern Capital Management, LLC
Reported value$856Mas of Sep 30, 2026
Positions166 6 new, 6 sold out
Top 10 weight16.9%AAPL alone is 3%
FiledNov 233 days after quarter end
Portfolio · as of Sep 30, 2026
Where the money is
New or addedTrimmedHeld
AAPLApple Inc.
2.8%Trimmed −7%
MSFTMicrosoft Corp
2.3%Trimmed −7%
GWWW.W. Grainger, Inc.
1.6%Trimmed −5%
CORCencora, Inc.
1.5%Trimmed −7%
COSTCostco Wholesale Corp
1.5%
AVGOBroadcom Inc.
1.5%
UNHUnitedHealth Group Inc
1.5%Trimmed −4%
ADPAutomatic Data Processing Inc
1.4%Trimmed −5%
AFLAflac Inc
1.4%Trimmed −2%
FDSFactSet Research Systems Inc
1.4%Trimmed −7%
LINLinde PLC
1.3%
CBChubb Ltd
1.3%Trimmed −3%
AAPLApple Inc.
2.8%Trimmed −7%
MSFTMicrosoft Corp
2.3%Trimmed −7%
GWWW.W. Grainger, Inc.
1.6%
CORCencora, Inc.
1.5%
COSTCostco Wholesale Corp
1.5%
AVGOBroadcom Inc.
1.5%
UNHUnitedHealth Group Inc
1.5%
ADPAutomatic Data Processing Inc
1.4%−5%
AFLAflac Inc
1.4%
FDS1.4%LIN1.3%CB1.3%Boxes show the top 12 stocks, sized against each other. The bar above shows how much of the fund they are. 13F only covers US-listed stocks, so foreign holdings and short positions are missing.
Show the top 12 as a list
AAPL Apple Inc. 2.8% Trimmed −7%MSFT Microsoft Corp 2.3% Trimmed −7%GWW W.W. Grainger, Inc. 1.6% Trimmed −5%COR Cencora, Inc. 1.5% Trimmed −7%COST Costco Wholesale Corp 1.5% HeldAVGO Broadcom Inc. 1.5% HeldUNH UnitedHealth Group Inc 1.5% Trimmed −4%ADP Automatic Data Processing Inc 1.4% Trimmed −5%AFL Aflac Inc 1.4% Trimmed −2%FDS FactSet Research Systems Inc 1.4% Trimmed −7%LIN Linde PLC 1.3% HeldCB Chubb Ltd 1.3% Trimmed −3%
What changed
Biggest moves since Jun 30, 2026
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