Carderock Capital Management Inc.
In its 13F for Q2 2026 (holdings as of June 30, 2026, filed July 7, 2026), Carderock Capital Management Inc. reported 67 stock positions worth $455.8 million. Its top holding was Lam Research (LRCX) at 7.0% of the portfolio, followed by Alphabet Class A (GOOGL, 4.4%) and Amphenol Class A (APH, 4.1%). Compared with Q1 2026, it opened 3 new positions, sold out of 9, added to 25 and reduced 28. The biggest buy was Fortinet (FTNT, shares +0%) and the biggest sale Intuit (INTU, shares −78%).
- Most Recent 13F
- Q2 2026
- Location
- CHEVY CHASE, MD
- CIK
- 0001168889
- Portfolio Value
- $455.8M (Q2 2026)
- SEC Filing
- 0001941040-26-000409 ↗ filed Jul 7, 2026
Holdings Value
Holdings 67 stocks · $455.8M
| LRCX Lam Research Corp. | 7.02% | 73,797 | $32.0M | Reduce -23.0% |
| GOOGL Alphabet Inc. Class A | 4.43% | 56,486 | $20.2M | Reduce -2.2% |
| APH Amphenol Corp. Class A | 4.12% | 106,575 | $18.8M | Reduce -6.1% |
| LLY Eli Lilly & Co. | 3.37% | 12,818 | $15.4M | Add +1.9% |
| AAPL Apple Inc. | 3.30% | 51,909 | $15.0M | Reduce -1.5% |
| HEI Heico Corp. | 3.13% | 40,081 | $14.3M | Add +6.8% |
| MPWR Monolithic Power Systems Inc. | 3.12% | 10,301 | $14.2M | Reduce -11.7% |
| PWR Quanta Services Inc. | 3.10% | 19,621 | $14.1M | Reduce -14.2% |
| FTNT Fortinet Inc. | 3.08% | 91,400 | $14.0M | Add +0.3% |
| MA Mastercard Inc. Class A | 2.74% | 24,357 | $12.5M | Add +6.1% |
| MNST Monster Beverage Corp. | 2.62% | 124,341 | $12.0M | Add +6.7% |
| NVDA Nvidia Corp. | 2.48% | 56,544 | $11.3M | Add +5.5% |
| AME Ametek Inc. | 2.43% | 45,841 | $11.1M | Add +0.8% |
| PH Parker Hannifin Corp. | 2.38% | 11,112 | $10.9M | Reduce -1.8% |
| TMO Thermo Fisher Scientific Inc. | 2.29% | 20,860 | $10.5M | Reduce -1.9% |
| MSFT Microsoft Corp. | 2.25% | 27,435 | $10.2M | Add +1.9% |
| COST Costco Wholesale Corp. | 2.22% | 10,821 | $10.1M | Add +11.4% |
| FSS Federal Signal Corp. | 2.11% | 74,774 | $9.6M | Add +118.6% |
| GWW WW Grainger Inc. | 2.05% | 6,874 | $9.4M | Add +12.4% |
| CDNS Cadence Design SYS Inc. | 2.05% | 24,899 | $9.3M | Reduce -8.8% |
| ORLY O'reilly Automotive Inc. | 2.04% | 101,093 | $9.3M | Reduce -1.2% |
| IDXX Idexx Laboratories Inc. | 1.92% | 16,627 | $8.8M | Add +1.0% |
| SHW The Sherwin-Williams Co. | 1.92% | 25,398 | $8.7M | Add +6.0% |
| STE Steris PLC | 1.85% | 40,090 | $8.4M | Add +3.5% |
| LIN Linde PLC | 1.78% | 15,606 | $8.1M | Add +5.1% |
| MSI Motorola Solutions Inc. | 1.74% | 19,069 | $7.9M | Add +6.8% |
| AON Aon PLC Class A | 1.71% | 23,559 | $7.8M | Add +9.1% |
| CTAS Cintas Corp. | 1.64% | 43,970 | $7.5M | Reduce -3.4% |
| ISRG Intuitive Surgical Inc. | 1.59% | 18,207 | $7.2M | Reduce -1.8% |
| HD Home Depot Inc. | 1.55% | 20,032 | $7.1M | Reduce -0.8% |
| APD Air Products & Chemicals Inc. | 1.51% | 23,505 | $6.9M | Reduce -5.1% |
| ACGL Arch Capital Group Ltd. | 1.50% | 70,348 | $6.8M | Reduce -1.5% |
| SYK Stryker Corp. | 1.50% | 21,642 | $6.8M | Add +6.4% |
| SPGI S&P Global Inc. | 1.46% | 16,357 | $6.7M | Reduce -27.5% |
| ITW Illinois Tool Works | 1.45% | 24,420 | $6.6M | Add +0.9% |
| MCO Moody's Corp. | 1.37% | 13,750 | $6.2M | Reduce -19.4% |
| WCN Waste Connections Inc. | 1.28% | 35,027 | $5.8M | Add +4.2% |
| IR Ingersoll-Rand Inc. | 1.17% | 65,223 | $5.3M | Add +0.9% |
| ADP Automatic Data Processing | 1.16% | 23,646 | $5.3M | Reduce -31.2% |
| TJX TJX Companies Inc. filed as TJX COS INC NEW | 1.15% | 34,486 | $5.2M | Add +22.6% |
| WMT Walmart Inc. | 1.11% | 44,837 | $5.1M | Add +12.0% |
| WSO Watsco Inc. | 1.05% | 11,519 | $4.8M | Add +215.6% |
| INTC Intel Corp. | 0.98% | 32,000 | $4.5M | No change |
| ETN Eaton Corp. PLC | 0.86% | 9,160 | $3.9M | New |
| AJG Arthur J Gallagher & Co. filed as GALLAGHER ARTHUR J & CO | 0.82% | 16,330 | $3.7M | New |
| WAT Waters Corp. | 0.61% | 7,417 | $2.8M | New |
| BRK.A Berkshire Hathaway Inc. Class A | 0.49% | 3 | $2.2M | No change |
| L Loews Corp. | 0.30% | 12,000 | $1.4M | No change |
| XOM Exxon Mobil Corp. | 0.22% | 7,233 | $989K | Reduce -29.1% |
| INTU Intuit Inc. | 0.20% | 3,407 | $889K | Reduce -78.1% |
| CHD Church & Dwight Co. Inc. | 0.19% | 8,898 | $862K | Reduce -7.3% |
| IYW iShares Ustechnology ETF | 0.16% | 2,875 | $725K | No change |
| MAR Marriott International Class A | 0.15% | 1,818 | $674K | Reduce -11.0% |
| LDOS Leidos Holdings Inc. | 0.14% | 6,251 | $644K | Reduce -82.6% |
| DRI Darden Restaurants Inc. | 0.14% | 3,000 | $618K | No change |
| BRK.B Berkshire Hathaway Inc. Class B | 0.13% | 1,200 | $600K | Reduce -20.0% |
| CVX Chevron Corp. | 0.13% | 3,582 | $594K | Reduce -14.3% |
| JPM JPMorgan Chase & Co. | 0.12% | 1,651 | $540K | Reduce -26.6% |
| CMG Chipotle Mexican Grill Inc. | 0.12% | 15,597 | $530K | Add +120.0% |
| TROW T Rowe Price Group Inc. filed as PRICE T ROWE GROUP INC | 0.09% | 3,450 | $392K | No change |
| WDFC WD-40 Co. | 0.08% | 1,500 | $365K | Reduce -25.0% |
| PAYX Paychex Inc. | 0.06% | 2,950 | $290K | No change |
| CSX CSX Corp. | 0.06% | 5,700 | $271K | No change |
| DNP DNP Select Income Fund Inc. | 0.06% | 23,604 | $255K | No change |
| KO The Coca-Cola Co. | 0.05% | 2,850 | $232K | No change |
| DHR Danaher Corp. | 0.05% | 1,106 | $211K | Reduce -95.7% |
| AZO AutoZone Inc. | 0.05% | 65 | $208K | No change |
Portfolio Sells Q1 2026 → Q2 2026
| INTU Intuit Inc. | Reduce -78.1% | 0.20% | −1.47 |
| LDOS Leidos Holdings Inc. | Reduce -82.6% | 0.14% | −1.24 |
| DHR Danaher Corp. | Reduce -95.7% | 0.05% | −1.15 |
| SPGI S&P Global Inc. | Reduce -27.5% | 1.46% | −0.91 |
| FICO Fair Isaac Corp. | Sold out | 0.00% | −0.72 |
| ADP Automatic Data Processing | Reduce -31.2% | 1.16% | −0.56 |
| ISRG Intuitive Surgical Inc. | Reduce -1.8% | 1.59% | −0.52 |
| MCO Moody's Corp. | Reduce -19.4% | 1.37% | −0.47 |
| ORLY O'reilly Automotive Inc. | Reduce -1.2% | 2.04% | −0.29 |
| TMO Thermo Fisher Scientific Inc. | Reduce -1.9% | 2.29% | −0.29 |
| APD Air Products & Chemicals Inc. | Reduce -5.1% | 1.51% | −0.26 |
| CTAS Cintas Corp. | Reduce -3.4% | 1.64% | −0.26 |
| XOM Exxon Mobil Corp. | Reduce -29.1% | 0.22% | −0.21 |
| ACGL Arch Capital Group Ltd. | Reduce -1.5% | 1.50% | −0.20 |
| PH Parker Hannifin Corp. | Reduce -1.8% | 2.38% | −0.12 |
| HD Home Depot Inc. | Reduce -0.8% | 1.55% | −0.09 |
| CVX Chevron Corp. | Reduce -14.3% | 0.13% | −0.08 |
| JNJ Johnson & Johnson | Sold out | 0.00% | −0.08 |
| GIS General Mills Inc. | Sold out | 0.00% | −0.07 |
| DLR Digital Realty Trust Inc. | Sold out | 0.00% | −0.07 |
| HON Honeywell International Inc. | Sold out | 0.00% | −0.06 |
| BMY Bristol-Myers Squibb Co. | Sold out | 0.00% | −0.06 |
| DVY iShares Select Dividend ETF | Sold out | 0.00% | −0.06 |
| ACN Accenture PLC Class A | Sold out | 0.00% | −0.06 |
| RTX RTX Corp. | Sold out | 0.00% | −0.05 |
| BRK.B Berkshire Hathaway Inc. Class B | Reduce -20.0% | 0.13% | −0.05 |
| JPM JPMorgan Chase & Co. | Reduce -26.6% | 0.12% | −0.04 |
| CHD Church & Dwight Co. Inc. | Reduce -7.3% | 0.19% | −0.03 |
| MPWR Monolithic Power Systems Inc. | Reduce -11.7% | 3.12% | −0.03 |
| WDFC WD-40 Co. | Reduce -25.0% | 0.08% | −0.02 |
| MAR Marriott International Class A | Reduce -11.0% | 0.15% | −0.02 |
| AAPL Apple Inc. | Reduce -1.5% | 3.30% | −0.01 |
| PWR Quanta Services Inc. | Reduce -14.2% | 3.10% | −0.00 |
| CDNS Cadence Design SYS Inc. | Reduce -8.8% | 2.05% | +0.18 |
| GOOGL Alphabet Inc. Class A | Reduce -2.2% | 4.43% | +0.32 |
| APH Amphenol Corp. Class A | Reduce -6.1% | 4.12% | +0.58 |
| LRCX Lam Research Corp. | Reduce -23.0% | 7.02% | +1.96 |
Portfolio Buys Q1 2026 → Q2 2026
| FTNT Fortinet Inc. | Add +0.3% | 3.08% | +1.24 |
| FSS Federal Signal Corp. | Add +118.6% | 2.11% | +1.19 |
| ETN Eaton Corp. PLC | New | 0.86% | +0.86 |
| AJG Arthur J Gallagher & Co. | New | 0.82% | +0.82 |
| WSO Watsco Inc. | Add +215.6% | 1.05% | +0.73 |
| WAT Waters Corp. | New | 0.61% | +0.61 |
| HEI Heico Corp. | Add +6.8% | 3.13% | +0.59 |
| MNST Monster Beverage Corp. | Add +6.7% | 2.62% | +0.54 |
| LLY Eli Lilly & Co. | Add +1.9% | 3.37% | +0.51 |
| GWW WW Grainger Inc. | Add +12.4% | 2.05% | +0.40 |
| NVDA Nvidia Corp. | Add +5.5% | 2.48% | +0.17 |
| CMG Chipotle Mexican Grill Inc. | Add +120.0% | 0.12% | +0.06 |
| TJX TJX Companies Inc. | Add +22.6% | 1.15% | +0.04 |
| AME Ametek Inc. | Add +0.8% | 2.43% | +0.02 |
| SHW The Sherwin-Williams Co. | Add +6.0% | 1.92% | +0.02 |
| AON Aon PLC Class A | Add +9.1% | 1.71% | −0.01 |
| LIN Linde PLC | Add +5.1% | 1.78% | −0.04 |
| WCN Waste Connections Inc. | Add +4.2% | 1.28% | −0.07 |
| MA Mastercard Inc. Class A | Add +6.1% | 2.74% | −0.09 |
| IR Ingersoll-Rand Inc. | Add +0.9% | 1.17% | −0.11 |
| ITW Illinois Tool Works | Add +0.9% | 1.45% | −0.11 |
| WMT Walmart Inc. | Add +12.0% | 1.11% | −0.12 |
| SYK Stryker Corp. | Add +6.4% | 1.50% | −0.16 |
| COST Costco Wholesale Corp. | Add +11.4% | 2.22% | −0.17 |
| MSI Motorola Solutions Inc. | Add +6.8% | 1.74% | −0.18 |
| MSFT Microsoft Corp. | Add +1.9% | 2.25% | −0.22 |
| STE Steris PLC | Add +3.5% | 1.85% | −0.26 |
| IDXX Idexx Laboratories Inc. | Add +1.0% | 1.92% | −0.36 |
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 |