Carderock Capital Management Inc.
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed October 17, 2025), Carderock Capital Management Inc. reported 72 stock positions worth $411.3 million. Its top holding was Amphenol Class A (APH) at 4.0% of the portfolio, followed by Lam Research (LRCX, 4.0%) and Microsoft (MSFT, 3.1%). Compared with Q2 2025, it sold out of 67, added to 40 and reduced 14. The biggest buy was Lam Research (LRCX, shares +3%) and the biggest sale Fortinet (FTNT, shares −0%).
- Most Recent 13F
- Q2 2026
- Location
- CHEVY CHASE, MD
- CIK
- 0001168889
- Portfolio Value
- $411.3M (Q3 2025)
- SEC Filing
- 0001168889-25-000007 ↗ filed Oct 17, 2025
Holdings Value
Holdings 72 stocks · $411.3M
| APH Amphenol Corp. Class A | 4.03% | 133,993 | $16.6M | Reduce -2.4% |
| LRCX Lam Research Corp. | 3.95% | 121,370 | $16.3M | Add +2.6% |
| MSFT Microsoft Corp. | 3.15% | 24,976 | $12.9M | Add +2.1% |
| GOOGL Alphabet Inc. Class A | 3.07% | 51,932 | $12.6M | Add +3.4% |
| HEI Heico Corp. | 2.90% | 36,978 | $11.9M | Add +3.0% |
| AAPL Apple Inc. | 2.82% | 45,530 | $11.6M | Add +2.9% |
| ORLY O'reilly Automotive Inc. | 2.73% | 103,961 | $11.2M | Reduce -3.6% |
| MA Mastercard Inc. Class A | 2.71% | 19,581 | $11.1M | Add +2.6% |
| IDXX Idexx Laboratories Inc. | 2.64% | 16,984 | $10.9M | Add +3.3% |
| PWR Quanta Services Inc. | 2.46% | 24,399 | $10.1M | Add +4.4% |
| SPGI S&P Global Inc. | 2.40% | 20,278 | $9.9M | Add +1.5% |
| CDNS Cadence Design SYS Inc. | 2.34% | 27,361 | $9.6M | Add +0.2% |
| CTAS Cintas Corp. | 2.30% | 46,011 | $9.4M | Add +1.2% |
| ADP Automatic Data Processing | 2.28% | 31,942 | $9.4M | Reduce -0.1% |
| PH Parker Hannifin Corp. | 2.13% | 11,561 | $8.8M | Add +3.6% |
| COST Costco Wholesale Corp. | 2.11% | 9,379 | $8.7M | Add +1.8% |
| LLY Eli Lilly & Co. | 2.07% | 11,162 | $8.5M | Add +1.1% |
| SHW The Sherwin-Williams Co. | 2.04% | 24,265 | $8.4M | Reduce -3.1% |
| AME Ametek Inc. | 2.02% | 44,187 | $8.3M | Add +0.1% |
| HD Home Depot Inc. | 2.01% | 20,375 | $8.3M | Reduce -0.0% |
| ISRG Intuitive Surgical Inc. | 2.00% | 18,357 | $8.2M | Add +2.6% |
| MCO Moody's Corp. | 2.00% | 17,225 | $8.2M | Add +3.7% |
| INTU Intuit Inc. | 1.99% | 11,983 | $8.2M | Add +5.6% |
| WCN Waste Connections Inc. | 1.98% | 46,435 | $8.2M | Add +0.9% |
| MPWR Monolithic Power Systems Inc. | 1.91% | 8,523 | $7.8M | Add +50.4% |
| FICO Fair Isaac Corp. | 1.90% | 5,209 | $7.8M | Add +12.1% |
| AON Aon PLC Class A | 1.88% | 21,641 | $7.7M | Add +6.9% |
| TMO Thermo Fisher Scientific Inc. | 1.81% | 15,355 | $7.4M | Add +10.0% |
| FTNT Fortinet Inc. | 1.81% | 88,521 | $7.4M | Reduce -0.1% |
| STE Steris PLC | 1.79% | 29,741 | $7.4M | Add +4.8% |
| SYK Stryker Corp. | 1.77% | 19,724 | $7.3M | Add +2.3% |
| ACGL Arch Capital Group Ltd. | 1.76% | 79,772 | $7.2M | Reduce -1.5% |
| APD Air Products & Chemicals Inc. | 1.76% | 26,507 | $7.2M | Add +1.7% |
| NVDA Nvidia Corp. | 1.58% | 34,836 | $6.5M | Add +59.2% |
| LDOS Leidos Holdings Inc. | 1.57% | 34,273 | $6.5M | Add +15.0% |
| ROP Roper Technologies Inc. | 1.50% | 12,371 | $6.2M | Reduce -2.2% |
| WSO Watsco Inc. | 1.43% | 14,499 | $5.9M | Add +0.1% |
| ITW Illinois Tool Works | 1.42% | 22,412 | $5.8M | Add +6.5% |
| GWW WW Grainger Inc. filed as GRAINGER W W INC | 1.39% | 6,009 | $5.7M | Add +8.1% |
| MNST Monster Beverage Corp. | 1.32% | 80,772 | $5.4M | Add +23.1% |
| FISV Fiserv Inc. | 1.30% | 41,327 | $5.3M | Add +0.3% |
| IR Ingersoll-Rand Inc. | 1.26% | 62,874 | $5.2M | Add +10.9% |
| ACN Accenture PLC Class A | 1.22% | 20,281 | $5.0M | Reduce -7.4% |
| MSI Motorola Solutions Inc. | 1.09% | 9,775 | $4.5M | Add +149.3% |
| LMT Lockheed Martin Corp. | 1.03% | 8,508 | $4.2M | Reduce -8.2% |
| DHR Danaher Corp. | 1.02% | 21,103 | $4.2M | Add +7.0% |
| CHD Church & Dwight Co. Inc. | 0.99% | 46,613 | $4.1M | Reduce -6.4% |
| LIN Linde PLC | 0.98% | 8,488 | $4.0M | Add +65.2% |
| CMG Chipotle Mexican Grill Inc. | 0.87% | 90,831 | $3.6M | Reduce -8.7% |
| BMI Badger Meter Inc. | 0.80% | 18,492 | $3.3M | Add +71.4% |
| VFIAX Vanguard 500 Index-Adm | 0.65% | 4,352 | $2.7M | No change |
| XOM Exxon Mobil Corp. | 0.29% | 10,608 | $1.2M | Reduce -21.5% |
| TROW T Rowe Price Group Inc. filed as PRICE T ROWE GROUP INC | 0.17% | 6,825 | $701K | Reduce -17.0% |
| CVX Chevron Corp. | 0.16% | 4,194 | $651K | Add +0.3% |
| MAR Marriott International Class A | 0.15% | 2,318 | $604K | No change |
| NPRTX Neuberger Large CP Value-Inv | 0.14% | 11,195 | $571K | No change |
| IYW iShares Ustechnology ETF | 0.14% | 2,875 | $563K | No change |
| NBGNX Neuberger Genesis Fund | 0.12% | 7,559 | $477K | No change |
| BRK.B Berkshire Hathaway Inc. Class B | 0.10% | 785 | $395K | No change |
| ABT Abbott Laboratories | 0.09% | 2,875 | $385K | No change |
| PAYX Paychex Inc. | 0.09% | 2,950 | $374K | No change |
| AJG Arthur J Gallagher & Co. filed as GALLAGHER ARTHUR J & CO | 0.08% | 1,050 | $325K | No change |
| AZO AutoZone Inc. | 0.07% | 65 | $279K | No change |
| DLR Digital Realty Trust Inc. | 0.07% | 1,600 | $277K | No change |
| JNJ Johnson & Johnson | 0.06% | 1,325 | $246K | No change |
| Duff & Phelps Util Income | 0.06% | 23,604 | $236K | No change |
| HON Honeywell International Inc. | 0.06% | 1,114 | $234K | 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 | $232K | No change |
| DVY iShares Select Dividend ETF | 0.06% | 1,600 | $227K | No change |
| MTD Mettler-Toledo International | 0.05% | 175 | $215K | No change |
| JPM JPMorgan Chase & Co. | 0.05% | 668 | $211K | Add +11.3% |
| CSX CSX Corp. | 0.05% | 5,700 | $202K | No change |
Portfolio Sells Q2 2025 → Q3 2025
| FTNT Fortinet Inc. | Reduce -0.1% | 1.81% | −0.59 |
| CMG Chipotle Mexican Grill Inc. | Reduce -8.7% | 0.87% | −0.57 |
| ACN Accenture PLC Class A | Reduce -7.4% | 1.22% | −0.46 |
| ROP Roper Technologies Inc. | Reduce -2.2% | 1.50% | −0.34 |
| ADP Automatic Data Processing | Reduce -0.1% | 2.28% | −0.25 |
| CHD Church & Dwight Co. Inc. | Reduce -6.4% | 0.99% | −0.23 |
| SHW The Sherwin-Williams Co. | Reduce -3.1% | 2.04% | −0.16 |
| ACGL Arch Capital Group Ltd. | Reduce -1.5% | 1.76% | −0.13 |
| ANSS Ansys Inc. | Sold out | 0.00% | −0.11 |
| UNP Union Pacific Corp. | Sold out | 0.00% | −0.10 |
| XOM Exxon Mobil Corp. | Reduce -21.5% | 0.29% | −0.08 |
| LMT Lockheed Martin Corp. | Reduce -8.2% | 1.03% | −0.07 |
| DE Deere & Co. | Sold out | 0.00% | −0.07 |
| KO The Coca-Cola Co. | Sold out | 0.00% | −0.05 |
| NFLX Netflix Inc. | Sold out | 0.00% | −0.05 |
| HIG Hartford Insurance Group Inc. | Sold out | 0.00% | −0.05 |
| PG The Procter & Gamble Co. | Sold out | 0.00% | −0.04 |
| RTX RTX Corp. | Sold out | 0.00% | −0.04 |
| IRT Independence Realty Trust Inc. | Sold out | 0.00% | −0.04 |
| TFC Truist Financial Corp. | Sold out | 0.00% | −0.03 |
| XLV SS Health Care Select Sector | Sold out | 0.00% | −0.03 |
| ABBV Abbvie Inc. | Sold out | 0.00% | −0.03 |
| TROW T Rowe Price Group Inc. | Reduce -17.0% | 0.17% | −0.03 |
| MPC Marathon Petroleum Corp. | Sold out | 0.00% | −0.03 |
| V Visa Inc. Class A | Sold out | 0.00% | −0.03 |
| JOHIX Johcm International Sel-Inst | Sold out | 0.00% | −0.03 |
| NTRS Northern Trust Corp. | Sold out | 0.00% | −0.03 |
| PGR Progressive Corp. | Sold out | 0.00% | −0.03 |
| ADC Agree Realty Corp. | Sold out | 0.00% | −0.02 |
| RPBAX T Rowe Price Balanced-Inv | Sold out | 0.00% | −0.02 |
| GS Goldman Sachs Group Inc. | Sold out | 0.00% | −0.02 |
| WFC Wells Fargo & Co. | Sold out | 0.00% | −0.02 |
| DGRO iShares Core Dividend Growth | Sold out | 0.00% | −0.02 |
| MET Metlife Inc. | Sold out | 0.00% | −0.02 |
| TRV The Travelers Cos Inc. | Sold out | 0.00% | −0.02 |
| PFE Pfizer Inc. | Sold out | 0.00% | −0.02 |
| GE General Electric | Sold out | 0.00% | −0.02 |
| SU Suncor Energy Inc. | Sold out | 0.00% | −0.02 |
| CL Colgate-Palmolive Co. | Sold out | 0.00% | −0.02 |
| PEP Pepsico Inc. | Sold out | 0.00% | −0.02 |
| XLU St Sr Utl SL SE SPDR ETF-Usd | Sold out | 0.00% | −0.02 |
| ERASX Eaton Vance Atl Cap Smid-R6 | Sold out | 0.00% | −0.02 |
| BN Brookfield Corp. | Sold out | 0.00% | −0.02 |
| NEE Nextera Energy Inc. | Sold out | 0.00% | −0.02 |
| MRK Merck & Co. Inc. | Sold out | 0.00% | −0.02 |
| CARR Carrier Global Corp. | Sold out | 0.00% | −0.01 |
| MFC Manulife Financial Corp. | Sold out | 0.00% | −0.01 |
| TQAIX T Rowe PR Intg S/C GR Eq-I | Sold out | 0.00% | −0.01 |
| OPPENHEIMER MLP SELECT 40-I | Sold out | 0.00% | −0.01 |
| GOOG Alphabet Inc. Class C | Sold out | 0.00% | −0.01 |
Portfolio Buys Q2 2025 → Q3 2025
| LRCX Lam Research Corp. | Add +2.6% | 3.95% | +1.00 |
| MPWR Monolithic Power Systems Inc. | Add +50.4% | 1.91% | +0.85 |
| GOOGL Alphabet Inc. Class A | Add +3.4% | 3.07% | +0.80 |
| NVDA Nvidia Corp. | Add +59.2% | 1.58% | +0.69 |
| MSI Motorola Solutions Inc. | Add +149.3% | 1.09% | +0.66 |
| AAPL Apple Inc. | Add +2.9% | 2.82% | +0.49 |
| IDXX Idexx Laboratories Inc. | Add +3.3% | 2.64% | +0.38 |
| LDOS Leidos Holdings Inc. | Add +15.0% | 1.57% | +0.37 |
| LIN Linde PLC | Add +65.2% | 0.98% | +0.36 |
| TMO Thermo Fisher Scientific Inc. | Add +10.0% | 1.81% | +0.36 |
| MNST Monster Beverage Corp. | Add +23.1% | 1.32% | +0.27 |
| PWR Quanta Services Inc. | Add +4.4% | 2.46% | +0.19 |
| CDNS Cadence Design SYS Inc. | Add +0.2% | 2.34% | +0.18 |
| PH Parker Hannifin Corp. | Add +3.6% | 2.13% | +0.13 |
| BMI Badger Meter Inc. | Add +71.4% | 0.80% | +0.13 |
| ITW Illinois Tool Works | Add +6.5% | 1.42% | +0.09 |
| IR Ingersoll-Rand Inc. | Add +10.9% | 1.26% | +0.06 |
| STE Steris PLC | Add +4.8% | 1.79% | +0.04 |
| MSFT Microsoft Corp. | Add +2.1% | 3.15% | +0.03 |
| AON Aon PLC Class A | Add +6.9% | 1.88% | +0.03 |
| DHR Danaher Corp. | Add +7.0% | 1.02% | +0.02 |
| JPM JPMorgan Chase & Co. | Add +11.3% | 0.05% | +0.01 |
| CVX Chevron Corp. | Add +0.3% | 0.16% | +0.00 |
| AME Ametek Inc. | Add +0.1% | 2.02% | −0.03 |
| MA Mastercard Inc. Class A | Add +2.6% | 2.71% | −0.04 |
| GWW WW Grainger Inc. | Add +8.1% | 1.39% | −0.09 |
| HEI Heico Corp. | Add +3.0% | 2.90% | −0.12 |
| APD Air Products & Chemicals Inc. | Add +1.7% | 1.76% | −0.13 |
| LLY Eli Lilly & Co. | Add +1.1% | 2.07% | −0.13 |
| MCO Moody's Corp. | Add +3.7% | 2.00% | −0.14 |
| SYK Stryker Corp. | Add +2.3% | 1.77% | −0.18 |
| WSO Watsco Inc. | Add +0.1% | 1.43% | −0.21 |
| WCN Waste Connections Inc. | Add +0.9% | 1.98% | −0.22 |
| COST Costco Wholesale Corp. | Add +1.8% | 2.11% | −0.22 |
| FICO Fair Isaac Corp. | Add +12.1% | 1.90% | −0.28 |
| SPGI S&P Global Inc. | Add +1.5% | 2.40% | −0.30 |
| CTAS Cintas Corp. | Add +1.2% | 2.30% | −0.30 |
| INTU Intuit Inc. | Add +5.6% | 1.99% | −0.30 |
| ISRG Intuitive Surgical Inc. | Add +2.6% | 2.00% | −0.49 |
| FISV Fiserv Inc. | Add +0.3% | 1.30% | −0.52 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 67 | $455.8M | LRCX, GOOGL, APH, LLY, AAPL |
| Q1 2026 | 73 | $404.8M | LRCX, GOOGL, APH, AAPL, MPWR |
| Q4 2025 | 69 | $412.7M | GOOGL, LRCX, APH, AAPL, LLY |
| Q3 2025 | 72 | $411.3M | APH, LRCX, MSFT, GOOGL, HEI |
| Q2 2025 | 139 | $390.4M | APH, MSFT, HEI, LRCX, MA |
| Q1 2025 | 70 | $377.3M | MA, AAPL, ISRG, FISV, CTAS |
| Q4 2024 | 73 | $398.7M | AAPL, MSFT, MA, GOOGL, APH |
| Q3 2024 | 73 | $423.6M | AAPL, MSFT, CTAS, PH, FICO |
| Q2 2024 | 69 | $382.2M | MSFT, AAPL, GOOGL, APH, LRCX |
| Q1 2024 | 68 | $356.8M | MSFT, MA, PH, CTAS, LRCX |