Carderock Capital Management Inc.
In its 13F for Q4 2025 (holdings as of December 31, 2025, filed January 9, 2026), Carderock Capital Management Inc. reported 69 stock positions worth $412.7 million. Its top holding was Alphabet Class A (GOOGL) at 4.4% of the portfolio, followed by Lam Research (LRCX, 4.4%) and Amphenol Class A (APH, 4.1%). Compared with Q3 2025, it opened 5 new positions, sold out of 8, added to 23 and reduced 31. The biggest buy was Alphabet Class A (GOOGL, shares +13%) and the biggest sale Fiserv (FISV, shares −85%).
- Most Recent 13F
- Q2 2026
- Location
- CHEVY CHASE, MD
- CIK
- 0001168889
- Portfolio Value
- $412.7M (Q4 2025)
- SEC Filing
- 0001941040-26-000007 ↗ filed Jan 9, 2026
Holdings Value
Holdings 69 stocks · $412.7M
| GOOGL Alphabet Inc. Class A | 4.45% | 58,651 | $18.4M | Add +12.9% |
| LRCX Lam Research Corp. | 4.39% | 105,936 | $18.1M | Reduce -12.7% |
| APH Amphenol Corp. Class A | 4.05% | 123,775 | $16.7M | Reduce -7.6% |
| AAPL Apple Inc. | 3.38% | 51,335 | $14.0M | Add +12.8% |
| LLY Eli Lilly & Co. | 3.17% | 12,184 | $13.1M | Add +9.2% |
| MA Mastercard Inc. Class A | 3.10% | 22,443 | $12.8M | Add +14.6% |
| MSFT Microsoft Corp. | 3.08% | 26,269 | $12.7M | Add +5.2% |
| TMO Thermo Fisher Scientific Inc. | 2.95% | 21,017 | $12.2M | Add +36.9% |
| SPGI S&P Global Inc. | 2.94% | 23,241 | $12.1M | Add +14.6% |
| HEI Heico Corp. | 2.93% | 37,313 | $12.1M | Add +0.9% |
| IDXX Idexx Laboratories Inc. | 2.75% | 16,775 | $11.3M | Reduce -1.2% |
| MPWR Monolithic Power Systems Inc. | 2.52% | 11,469 | $10.4M | Add +34.6% |
| ISRG Intuitive Surgical Inc. | 2.50% | 18,244 | $10.3M | Reduce -0.6% |
| PWR Quanta Services Inc. | 2.45% | 23,914 | $10.1M | Reduce -2.0% |
| PH Parker Hannifin Corp. | 2.40% | 11,256 | $9.9M | Reduce -2.6% |
| STE Steris PLC | 2.28% | 37,085 | $9.4M | Add +24.7% |
| ORLY O'reilly Automotive Inc. | 2.27% | 102,914 | $9.4M | Reduce -1.0% |
| AME Ametek Inc. | 2.18% | 43,789 | $9.0M | Reduce -0.9% |
| MCO Moody's Corp. | 2.17% | 17,568 | $9.0M | Add +2.0% |
| FICO Fair Isaac Corp. | 2.15% | 5,241 | $8.9M | Add +0.6% |
| NVDA Nvidia Corp. | 2.14% | 47,258 | $8.8M | Add +35.7% |
| MNST Monster Beverage Corp. | 2.12% | 114,024 | $8.7M | Add +41.2% |
| CTAS Cintas Corp. | 2.09% | 45,958 | $8.6M | Reduce -0.1% |
| ADP Automatic Data Processing | 2.09% | 33,507 | $8.6M | Add +4.9% |
| CDNS Cadence Design SYS Inc. | 2.06% | 27,161 | $8.5M | Reduce -0.7% |
| COST Costco Wholesale Corp. | 1.98% | 9,488 | $8.2M | Add +1.2% |
| AON Aon PLC Class A | 1.92% | 22,438 | $7.9M | Add +3.7% |
| INTU Intuit Inc. | 1.90% | 11,868 | $7.9M | Reduce -1.0% |
| SHW The Sherwin-Williams Co. | 1.88% | 24,004 | $7.8M | Reduce -1.1% |
| FTNT Fortinet Inc. | 1.81% | 94,124 | $7.5M | Add +6.3% |
| HD Home Depot Inc. | 1.68% | 20,202 | $7.0M | Reduce -0.8% |
| SYK Stryker Corp. | 1.66% | 19,452 | $6.8M | Reduce -1.4% |
| ACGL Arch Capital Group Ltd. | 1.62% | 69,879 | $6.7M | Reduce -12.4% |
| LDOS Leidos Holdings Inc. | 1.55% | 35,498 | $6.4M | Add +3.6% |
| GWW WW Grainger Inc. | 1.47% | 5,999 | $6.1M | Reduce -0.2% |
| WCN Waste Connections Inc. | 1.41% | 33,212 | $5.8M | Reduce -28.5% |
| ITW Illinois Tool Works | 1.41% | 23,638 | $5.8M | Add +5.5% |
| DHR Danaher Corp. | 1.36% | 24,465 | $5.6M | Add +15.9% |
| APD Air Products & Chemicals Inc. | 1.26% | 20,994 | $5.2M | Reduce -20.8% |
| IR Ingersoll-Rand Inc. | 1.21% | 62,858 | $5.0M | Reduce -0.0% |
| MSI Motorola Solutions Inc. | 1.06% | 11,408 | $4.4M | Add +16.7% |
| LIN Linde PLC | 1.03% | 9,971 | $4.3M | Add +17.5% |
| ROP Roper Technologies Inc. | 0.72% | 6,673 | $3.0M | Reduce -46.1% |
| BMI Badger Meter Inc. | 0.59% | 14,010 | $2.4M | Reduce -24.2% |
| TJX TJX Companies Inc. filed as TJX COS INC NEW | 0.44% | 11,853 | $1.8M | New |
| FSS Federal Signal Corp. | 0.41% | 15,586 | $1.7M | New |
| WMT Walmart Inc. | 0.40% | 14,739 | $1.6M | New |
| CHD Church & Dwight Co. Inc. | 0.35% | 17,418 | $1.5M | Reduce -62.6% |
| XOM Exxon Mobil Corp. | 0.31% | 10,608 | $1.3M | No change |
| ACN Accenture PLC Class A | 0.30% | 4,600 | $1.2M | Reduce -77.3% |
| WSO Watsco Inc. | 0.23% | 2,822 | $951K | Reduce -80.5% |
| MAR Marriott International Class A | 0.16% | 2,143 | $665K | Reduce -7.5% |
| CVX Chevron Corp. | 0.15% | 4,182 | $637K | Reduce -0.3% |
| IYW iShares Ustechnology ETF | 0.14% | 2,875 | $574K | No change |
| FISV Fiserv Inc. | 0.10% | 6,024 | $405K | Reduce -85.4% |
| BRK.B Berkshire Hathaway Inc. Class B | 0.10% | 785 | $395K | No change |
| TROW T Rowe Price Group Inc. filed as PRICE T ROWE GROUP INC | 0.09% | 3,450 | $353K | Reduce -49.5% |
| PAYX Paychex Inc. | 0.08% | 2,950 | $331K | No change |
| JNJ Johnson & Johnson | 0.07% | 1,325 | $274K | No change |
| DLR Digital Realty Trust Inc. | 0.06% | 1,600 | $248K | No change |
| ABT Abbott Laboratories | 0.06% | 1,975 | $247K | Reduce -31.3% |
| DNP DNP Select Income Fund Inc. | 0.06% | 23,604 | $236K | New |
| CMG Chipotle Mexican Grill Inc. | 0.06% | 6,194 | $229K | Reduce -93.2% |
| DVY iShares Select Dividend ETF | 0.05% | 1,600 | $226K | No change |
| AZO AutoZone Inc. | 0.05% | 65 | $220K | No change |
| HON Honeywell International Inc. | 0.05% | 1,114 | $217K | No change |
| JPM JPMorgan Chase & Co. | 0.05% | 654 | $211K | Reduce -2.1% |
| CSX CSX Corp. | 0.05% | 5,700 | $207K | No change |
| RTX RTX Corp. | 0.05% | 1,125 | $206K | New |
Portfolio Sells Q3 2025 → Q4 2025
| FISV Fiserv Inc. | Reduce -85.4% | 0.10% | −1.20 |
| WSO Watsco Inc. | Reduce -80.5% | 0.23% | −1.19 |
| LMT Lockheed Martin Corp. | Sold out | 0.00% | −1.03 |
| ACN Accenture PLC Class A | Reduce -77.3% | 0.30% | −0.92 |
| CMG Chipotle Mexican Grill Inc. | Reduce -93.2% | 0.06% | −0.81 |
| ROP Roper Technologies Inc. | Reduce -46.1% | 0.72% | −0.78 |
| VFIAX Vanguard 500 Index-Adm | Sold out | 0.00% | −0.65 |
| CHD Church & Dwight Co. Inc. | Reduce -62.6% | 0.35% | −0.64 |
| WCN Waste Connections Inc. | Reduce -28.5% | 1.41% | −0.57 |
| APD Air Products & Chemicals Inc. | Reduce -20.8% | 1.26% | −0.50 |
| ORLY O'reilly Automotive Inc. | Reduce -1.0% | 2.27% | −0.45 |
| HD Home Depot Inc. | Reduce -0.8% | 1.68% | −0.32 |
| CDNS Cadence Design SYS Inc. | Reduce -0.7% | 2.06% | −0.28 |
| BMI Badger Meter Inc. | Reduce -24.2% | 0.59% | −0.21 |
| CTAS Cintas Corp. | Reduce -0.1% | 2.09% | −0.20 |
| SHW The Sherwin-Williams Co. | Reduce -1.1% | 1.88% | −0.16 |
| NPRTX Neuberger Large CP Value-Inv | Sold out | 0.00% | −0.14 |
| ACGL Arch Capital Group Ltd. | Reduce -12.4% | 1.62% | −0.14 |
| SYK Stryker Corp. | Reduce -1.4% | 1.66% | −0.12 |
| NBGNX Neuberger Genesis Fund | Sold out | 0.00% | −0.12 |
| INTU Intuit Inc. | Reduce -1.0% | 1.90% | −0.08 |
| TROW T Rowe Price Group Inc. | Reduce -49.5% | 0.09% | −0.08 |
| AJG Arthur J Gallagher & Co. | Sold out | 0.00% | −0.08 |
| Duff & Phelps Util Income | Sold out | 0.00% | −0.06 |
| IR Ingersoll-Rand Inc. | Reduce -0.0% | 1.21% | −0.06 |
| DFEOX Dfa US Core Eqty 1 Port-Inst | Sold out | 0.00% | −0.06 |
| MTD Mettler-Toledo International | Sold out | 0.00% | −0.05 |
| ABT Abbott Laboratories | Reduce -31.3% | 0.06% | −0.03 |
| PWR Quanta Services Inc. | Reduce -2.0% | 2.45% | −0.01 |
| CVX Chevron Corp. | Reduce -0.3% | 0.15% | −0.00 |
| JPM JPMorgan Chase & Co. | Reduce -2.1% | 0.05% | −0.00 |
| MAR Marriott International Class A | Reduce -7.5% | 0.16% | +0.01 |
| APH Amphenol Corp. Class A | Reduce -7.6% | 4.05% | +0.02 |
| GWW WW Grainger Inc. | Reduce -0.2% | 1.47% | +0.07 |
| IDXX Idexx Laboratories Inc. | Reduce -1.2% | 2.75% | +0.11 |
| AME Ametek Inc. | Reduce -0.9% | 2.18% | +0.16 |
| PH Parker Hannifin Corp. | Reduce -2.6% | 2.40% | +0.27 |
| LRCX Lam Research Corp. | Reduce -12.7% | 4.39% | +0.44 |
| ISRG Intuitive Surgical Inc. | Reduce -0.6% | 2.50% | +0.51 |
Portfolio Buys Q3 2025 → Q4 2025
| GOOGL Alphabet Inc. Class A | Add +12.9% | 4.45% | +1.38 |
| TMO Thermo Fisher Scientific Inc. | Add +36.9% | 2.95% | +1.14 |
| LLY Eli Lilly & Co. | Add +9.2% | 3.17% | +1.10 |
| MNST Monster Beverage Corp. | Add +41.2% | 2.12% | +0.80 |
| MPWR Monolithic Power Systems Inc. | Add +34.6% | 2.52% | +0.61 |
| AAPL Apple Inc. | Add +12.8% | 3.38% | +0.56 |
| NVDA Nvidia Corp. | Add +35.7% | 2.14% | +0.56 |
| SPGI S&P Global Inc. | Add +14.6% | 2.94% | +0.54 |
| STE Steris PLC | Add +24.7% | 2.28% | +0.49 |
| TJX TJX Companies Inc. | New | 0.44% | +0.44 |
| FSS Federal Signal Corp. | New | 0.41% | +0.41 |
| WMT Walmart Inc. | New | 0.40% | +0.40 |
| MA Mastercard Inc. Class A | Add +14.6% | 3.10% | +0.40 |
| DHR Danaher Corp. | Add +15.9% | 1.36% | +0.34 |
| FICO Fair Isaac Corp. | Add +0.6% | 2.15% | +0.25 |
| MCO Moody's Corp. | Add +2.0% | 2.17% | +0.18 |
| DNP DNP Select Income Fund Inc. | New | 0.06% | +0.06 |
| RTX RTX Corp. | New | 0.05% | +0.05 |
| LIN Linde PLC | Add +17.5% | 1.03% | +0.05 |
| AON Aon PLC Class A | Add +3.7% | 1.92% | +0.04 |
| HEI Heico Corp. | Add +0.9% | 2.93% | +0.02 |
| FTNT Fortinet Inc. | Add +6.3% | 1.81% | +0.00 |
| ITW Illinois Tool Works | Add +5.5% | 1.41% | −0.01 |
| LDOS Leidos Holdings Inc. | Add +3.6% | 1.55% | −0.02 |
| MSI Motorola Solutions Inc. | Add +16.7% | 1.06% | −0.03 |
| MSFT Microsoft Corp. | Add +5.2% | 3.08% | −0.07 |
| COST Costco Wholesale Corp. | Add +1.2% | 1.98% | −0.13 |
| ADP Automatic Data Processing | Add +4.9% | 2.09% | −0.19 |
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 |