Carderock Capital Management Inc.

In its 13F for Q2 2025 (holdings as of June 30, 2025, filed July 10, 2025), Carderock Capital Management Inc. reported 139 stock positions worth $390.4 million. Its top holding was Amphenol Class A (APH) at 3.5% of the portfolio, followed by Microsoft (MSFT, 3.1%) and Heico (HEI, 3.0%). Compared with Q1 2025, it opened 70 new positions, sold out of 1, added to 24 and reduced 29. The biggest buy was Lam Research (LRCX, shares +9%) and the biggest sale an exit from Unitedhealth (UNH).

Most Recent 13F
Q2 2026
Location
CHEVY CHASE, MD
CIK
0001168889
Portfolio Value
$390.4M (Q2 2025)
SEC Filing
0001168889-25-000004 ↗ filed Jul 10, 2025

Holdings Value

0$100.0M$200.0M$300.0M$400.0M$500.0M Q1 2024: $356.8M Q1 2024 Q2 2024: $382.2M Q2 2024 Q3 2024: $423.6M Q3 2024 Q4 2024: $398.7M Q4 2024 Q1 2025: $377.3M Q1 2025 Q2 2025: $390.4M $390.4M Q2 2025 Q3 2025: $411.3M Q3 2025 Q4 2025: $412.7M Q4 2025 Q1 2026: $404.8M Q1 2026 Q2 2026: $455.8M Q2 2026

Holdings 139 stocks · $390.4M
APH Amphenol Corp. Class A 3.47% 137,281 $13.6M Reduce -12.0%
MSFT Microsoft Corp. 3.12% 24,469 $12.2M Add +2.7%
HEI Heico Corp. 3.02% 35,909 $11.8M Add +0.8%
LRCX Lam Research Corp. 2.95% 118,243 $11.5M Add +8.6%
MA Mastercard Inc. Class A 2.75% 19,087 $10.7M Reduce -17.1%
SPGI S&P Global Inc. 2.70% 19,973 $10.5M Add +1.0%
CTAS Cintas Corp. 2.60% 45,464 $10.1M Reduce -10.8%
ADP Automatic Data Processing 2.53% 31,969 $9.9M Add +1.1%
ISRG Intuitive Surgical Inc. 2.49% 17,892 $9.7M Reduce -17.4%
ORLY O'reilly Automotive Inc. 2.49% 107,858 $9.7M Add +2.4%
FTNT Fortinet Inc. 2.40% 88,562 $9.4M Add +3.5%
COST Costco Wholesale Corp. 2.34% 9,210 $9.1M Reduce -14.1%
AAPL Apple Inc. 2.33% 44,256 $9.1M Reduce -16.3%
INTU Intuit Inc. 2.29% 11,350 $8.9M Add +6.1%
GOOGL Alphabet Inc. Class A 2.27% 50,229 $8.9M Reduce -14.0%
PWR Quanta Services Inc. 2.26% 23,379 $8.8M Reduce -17.5%
IDXX Idexx Laboratories Inc. 2.26% 16,446 $8.8M Add +14.0%
LLY Eli Lilly & Co. 2.20% 11,041 $8.6M Add +16.7%
SHW The Sherwin-Williams Co. 2.20% 25,045 $8.6M Add +6.3%
WCN Waste Connections Inc. 2.20% 46,031 $8.6M Add +5.7%
FICO Fair Isaac Corp. 2.18% 4,649 $8.5M Add +0.2%
CDNS Cadence Design SYS Inc. 2.16% 27,301 $8.4M Reduce -4.6%
MCO Moody's Corp. 2.13% 16,613 $8.3M Reduce -17.3%
AME Ametek Inc. 2.05% 44,120 $8.0M Reduce -1.4%
PH Parker Hannifin Corp. 2.00% 11,160 $7.8M Reduce -19.6%
SYK Stryker Corp. 1.95% 19,282 $7.6M Reduce -17.3%
HD Home Depot Inc. 1.91% 20,379 $7.5M Reduce -4.3%
ACGL Arch Capital Group Ltd. 1.89% 80,999 $7.4M Reduce -3.0%
APD Air Products & Chemicals Inc. 1.88% 26,070 $7.4M Reduce -1.5%
AON Aon PLC Class A 1.85% 20,245 $7.2M Add +3.5%
ROP Roper Technologies Inc. 1.84% 12,653 $7.2M Reduce -10.6%
FISV Fiserv Inc. 1.82% 41,193 $7.1M Reduce -13.3%
STE Steris PLC 1.75% 28,387 $6.8M Add +7.5%
ACN Accenture PLC Class A 1.68% 21,892 $6.5M Reduce -1.3%
WSO Watsco Inc. 1.64% 14,486 $6.4M Add +4.6%
GWW WW Grainger Inc. filed as GRAINGER W W INC 1.48% 5,560 $5.8M Add +4.4%
TMO Thermo Fisher Scientific Inc. 1.45% 13,959 $5.7M Add +2.7%
CMG Chipotle Mexican Grill Inc. 1.43% 99,496 $5.6M Reduce -7.6%
ITW Illinois Tool Works 1.33% 21,052 $5.2M Reduce -1.0%
CHD Church & Dwight Co. Inc. 1.23% 49,815 $4.8M Reduce -1.7%
IR Ingersoll-Rand Inc. 1.21% 56,682 $4.7M Reduce -15.7%
LDOS Leidos Holdings Inc. 1.20% 29,806 $4.7M Add +45.4%
LMT Lockheed Martin Corp. 1.10% 9,272 $4.3M Add +11.7%
MPWR Monolithic Power Systems Inc. 1.06% 5,667 $4.1M Reduce -10.9%
MNST Monster Beverage Corp. 1.05% 65,638 $4.1M Add +19.9%
DHR Danaher Corp. 1.00% 19,728 $3.9M Add +1.4%
NVDA Nvidia Corp. 0.89% 21,885 $3.5M Reduce -56.6%
BMI Badger Meter Inc. 0.68% 10,790 $2.6M New
VFIAX Vanguard 500 Index-Adm 0.64% 4,352 $2.5M No change
LIN Linde PLC 0.62% 5,138 $2.4M New
MSI Motorola Solutions Inc. 0.42% 3,921 $1.6M New
XOM Exxon Mobil Corp. 0.37% 13,508 $1.5M No change
TROW T Rowe Price Group Inc. filed as PRICE T ROWE GROUP INC 0.20% 8,225 $794K No change
MAR Marriott International Class A 0.16% 2,318 $633K Reduce -5.2%
CVX Chevron Corp. 0.15% 4,182 $599K No change
NPRTX Neuberger Large CP Value-Inv 0.14% 11,195 $537K No change
IYW iShares Ustechnology ETF 0.13% 2,875 $498K No change
NBGNX Neuberger Genesis Fund 0.12% 7,559 $471K No change
ANSS Ansys Inc. 0.11% 1,249 $439K Add +10.6%
PAYX Paychex Inc. 0.11% 2,950 $429K No change
UNP Union Pacific Corp. 0.10% 1,720 $396K No change
ABT Abbott Laboratories 0.10% 2,875 $391K Reduce -0.9%
BRK.B Berkshire Hathaway Inc. Class B 0.10% 785 $381K Add +15.4%
AJG Arthur J Gallagher & Co. filed as GALLAGHER ARTHUR J & CO 0.09% 1,050 $336K Reduce -4.5%
DLR Digital Realty Trust Inc. 0.07% 1,600 $279K No change
HON Honeywell International Inc. 0.07% 1,114 $259K Reduce -2.2%
DE Deere & Co. 0.07% 500 $254K No change
AZO AutoZone Inc. 0.06% 65 $241K No change
Duff & Phelps Util Income 0.06% 23,604 $231K No change
DFEOX Dfa US Core Eqty 1 Port-Inst filed as DFA INVT DIMENSIONS GROUP IN US CORE EQ 1PT 0.06% 4,781 $216K New
DVY iShares Select Dividend ETF 0.05% 1,600 $212K No change
MTD Mettler-Toledo International 0.05% 175 $206K New
JNJ Johnson & Johnson 0.05% 1,325 $202K No change
KO The Coca-Cola Co. 0.05% 2,850 $202K No change
NFLX Netflix Inc. 0.05% 150 $201K New
CSX CSX Corp. 0.05% 5,700 $186K New
HIG Hartford Insurance Group Inc. 0.05% 1,400 $178K New
JPM JPMorgan Chase & Co. 0.04% 600 $174K New
PG The Procter & Gamble Co. 0.04% 1,075 $171K New
RTX RTX Corp. 0.04% 1,125 $164K New
IRT Independence Realty Trust Inc. 0.04% 9,000 $159K New
TFC Truist Financial Corp. 0.03% 3,137 $135K New
XLV SS Health Care Select Sector 0.03% 980 $132K New
ABBV Abbvie Inc. 0.03% 700 $130K New
MPC Marathon Petroleum Corp. 0.03% 750 $125K New
V Visa Inc. Class A 0.03% 340 $121K New
JOHIX Johcm International Sel-Inst 0.03% 4,150 $109K New
NTRS Northern Trust Corp. 0.03% 850 $108K New
PGR Progressive Corp. 0.03% 375 $100K New
ADC Agree Realty Corp. 0.02% 1,300 $95K New
RPBAX T Rowe Price Balanced-Inv 0.02% 3,329 $93K New
GS Goldman Sachs Group Inc. 0.02% 125 $88K New
WFC Wells Fargo & Co. 0.02% 1,100 $88K New
DGRO iShares Core Dividend Growth 0.02% 1,350 $86K New
MET Metlife Inc. 0.02% 1,000 $80K New
TRV The Travelers Cos Inc. 0.02% 300 $80K New
PFE Pfizer Inc. 0.02% 3,200 $78K New
GE General Electric filed as GE AEROSPACE 0.02% 300 $77K New
SU Suncor Energy Inc. 0.02% 2,000 $75K New
CL Colgate-Palmolive Co. 0.02% 800 $73K New

Show all 139 holdings

Portfolio Sells Q1 2025 → Q2 2025
UNH Unitedhealth Group Inc. Sold out 0.00% −1.44
FISV Fiserv Inc. Reduce -13.3% 1.82% −0.96
AAPL Apple Inc. Reduce -16.3% 2.33% −0.79
MA Mastercard Inc. Class A Reduce -17.1% 2.75% −0.60
NVDA Nvidia Corp. Reduce -56.6% 0.89% −0.56
ROP Roper Technologies Inc. Reduce -10.6% 1.84% −0.37
COST Costco Wholesale Corp. Reduce -14.1% 2.34% −0.35
ISRG Intuitive Surgical Inc. Reduce -17.4% 2.49% −0.35
SYK Stryker Corp. Reduce -17.3% 1.95% −0.35
MCO Moody's Corp. Reduce -17.3% 2.13% −0.34
CHD Church & Dwight Co. Inc. Reduce -1.7% 1.23% −0.25
ACGL Arch Capital Group Ltd. Reduce -3.0% 1.89% −0.24
PH Parker Hannifin Corp. Reduce -19.6% 2.00% −0.24
IR Ingersoll-Rand Inc. Reduce -15.7% 1.21% −0.22
APD Air Products & Chemicals Inc. Reduce -1.5% 1.88% −0.18
CTAS Cintas Corp. Reduce -10.8% 2.60% −0.18
ACN Accenture PLC Class A Reduce -1.3% 1.68% −0.16
HD Home Depot Inc. Reduce -4.3% 1.91% −0.15
GOOGL Alphabet Inc. Class A Reduce -14.0% 2.27% −0.13
ITW Illinois Tool Works Reduce -1.0% 1.33% −0.06
AJG Arthur J Gallagher & Co. Reduce -4.5% 0.09% −0.01
CMG Chipotle Mexican Grill Inc. Reduce -7.6% 1.43% −0.00
ABT Abbott Laboratories Reduce -0.9% 0.10% −0.00
HON Honeywell International Inc. Reduce -2.2% 0.07% +0.00
AME Ametek Inc. Reduce -1.4% 2.05% +0.00
MAR Marriott International Class A Reduce -5.2% 0.16% +0.01
MPWR Monolithic Power Systems Inc. Reduce -10.9% 1.06% +0.08
CDNS Cadence Design SYS Inc. Reduce -4.6% 2.16% +0.23
PWR Quanta Services Inc. Reduce -17.5% 2.26% +0.36
APH Amphenol Corp. Class A Reduce -12.0% 3.47% +0.76

Portfolio Buys Q1 2025 → Q2 2025
LRCX Lam Research Corp. Add +8.6% 2.95% +0.85
MSFT Microsoft Corp. Add +2.7% 3.12% +0.75
BMI Badger Meter Inc. New 0.68% +0.68
IDXX Idexx Laboratories Inc. Add +14.0% 2.26% +0.65
LIN Linde PLC New 0.62% +0.62
INTU Intuit Inc. Add +6.1% 2.29% +0.55
HEI Heico Corp. Add +0.8% 3.02% +0.50
LDOS Leidos Holdings Inc. Add +45.4% 1.20% +0.47
MSI Motorola Solutions Inc. New 0.42% +0.42
FTNT Fortinet Inc. Add +3.5% 2.40% +0.22
MNST Monster Beverage Corp. Add +19.9% 1.05% +0.20
STE Steris PLC Add +7.5% 1.75% +0.16
LLY Eli Lilly & Co. Add +16.7% 2.20% +0.13
LMT Lockheed Martin Corp. Add +11.7% 1.10% +0.12
GWW WW Grainger Inc. Add +4.4% 1.48% +0.09
DFEOX Dfa US Core Eqty 1 Port-Inst New 0.06% +0.06
MTD Mettler-Toledo International New 0.05% +0.05
NFLX Netflix Inc. New 0.05% +0.05
CSX CSX Corp. New 0.05% +0.05
HIG Hartford Insurance Group Inc. New 0.05% +0.05
JPM JPMorgan Chase & Co. New 0.04% +0.04
PG The Procter & Gamble Co. New 0.04% +0.04
RTX RTX Corp. New 0.04% +0.04
IRT Independence Realty Trust Inc. New 0.04% +0.04
SPGI S&P Global Inc. Add +1.0% 2.70% +0.03
TFC Truist Financial Corp. New 0.03% +0.03
XLV SS Health Care Select Sector New 0.03% +0.03
ABBV Abbvie Inc. New 0.03% +0.03
MPC Marathon Petroleum Corp. New 0.03% +0.03
V Visa Inc. Class A New 0.03% +0.03
JOHIX Johcm International Sel-Inst New 0.03% +0.03
NTRS Northern Trust Corp. New 0.03% +0.03
PGR Progressive Corp. New 0.03% +0.03
ADC Agree Realty Corp. New 0.02% +0.02
RPBAX T Rowe Price Balanced-Inv New 0.02% +0.02
GS Goldman Sachs Group Inc. New 0.02% +0.02
WFC Wells Fargo & Co. New 0.02% +0.02
SHW The Sherwin-Williams Co. Add +6.3% 2.20% +0.02
DGRO iShares Core Dividend Growth New 0.02% +0.02
MET Metlife Inc. New 0.02% +0.02
TRV The Travelers Cos Inc. New 0.02% +0.02
PFE Pfizer Inc. New 0.02% +0.02
GE General Electric New 0.02% +0.02
SU Suncor Energy Inc. New 0.02% +0.02
CL Colgate-Palmolive Co. New 0.02% +0.02
PEP Pepsico Inc. New 0.02% +0.02
XLU St Sr Utl SL SE SPDR ETF-Usd New 0.02% +0.02
ANSS Ansys Inc. Add +10.6% 0.11% +0.02
ERASX Eaton Vance Atl Cap Smid-R6 New 0.02% +0.02
BN Brookfield Corp. New 0.02% +0.02

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 67$455.8MLRCX, GOOGL, APH, LLY, AAPL
Q1 2026 73$404.8MLRCX, GOOGL, APH, AAPL, MPWR
Q4 2025 69$412.7MGOOGL, LRCX, APH, AAPL, LLY
Q3 2025 72$411.3MAPH, LRCX, MSFT, GOOGL, HEI
Q2 2025 139$390.4MAPH, MSFT, HEI, LRCX, MA
Q1 2025 70$377.3MMA, AAPL, ISRG, FISV, CTAS
Q4 2024 73$398.7MAAPL, MSFT, MA, GOOGL, APH
Q3 2024 73$423.6MAAPL, MSFT, CTAS, PH, FICO
Q2 2024 69$382.2MMSFT, AAPL, GOOGL, APH, LRCX
Q1 2024 68$356.8MMSFT, MA, PH, CTAS, LRCX