CIK: 0001168889
Total reported value
$455.8M
Reporting period: 2026-06-30 · Number of holdings: 67
CARDEROCK CAPITAL MANAGEMENT INC disclosed 67 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $455.8M and a quarterly turnover rate of 25.9%.
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Carderock Capital Management INC's disclosed holdings carry a Herfindahl concentration index of 0.026 — mathematically equivalent to about 38 equally-sized positions, well below its 67 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.88), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Add LRCX
-23.0% $11.5M
Trim INTU
-78.1% -$5.8M
Add FTNT
+0.3% $6.6M
Trim LDOS
-82.6% -$4.9M
Add FSS
+118.6% $5.9M
Trim DHR
-95.7% -$4.6M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | LRCX | Lam Research CORP | Stock-Tech | 7.02% | +1.96% | -22.97% | |
| 2 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 4.43% | +0.33% | -2.24% | |
| 3 | APH | Amphenol Corp-cl A | Stock-Tech | 4.12% | +0.58% | -6.06% | |
| 4 | LLY | Eli Lilly & Co | Stock-Healthcare | 3.37% | +0.51% | +1.88% | |
| 5 | AAPL | Apple INC | Stock-Tech | 3.30% | — | -1.52% | |
| 6 | HEI | Heico CORP | Stock-Industrials | 3.13% | +0.59% | +6.81% | |
| 7 | MPWR | Monolithic Power Systems INC | Stock-Tech | 3.12% | -0.03% | -11.69% | |
| 8 | PWR | Quanta Services INC | Stock-Industrials | 3.10% | — | -14.20% | |
| 9 | FTNT | Fortinet INC | Stock-Tech | 3.08% | +1.24% | +0.32% | |
| 10 | MA | Mastercard INC - A | Stock-Financials | 2.74% | -0.09% | +6.07% | |
| 11 | MNST | Monster Beverage CORP | Stock-Consumer Staples | 2.62% | +0.53% | +6.73% | |
| 12 | NVDA | Nvidia CORP | Stock-Tech | 2.48% | +0.17% | +5.47% | |
| 13 | AME | Ametek INC | Stock-Industrials | 2.43% | +0.02% | +0.76% | |
| 14 | PH | Parker Hannifin CORP | Stock-Industrials | 2.38% | -0.12% | -1.83% | |
| 15 | TMO | Thermo Fisher Scientific INC | Stock-Healthcare | 2.29% | — | -1.92% | |
| 16 | MSFT | Microsoft CORP | Stock-Tech | 2.25% | -0.21% | +1.88% | |
| 17 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 2.22% | -0.17% | +11.37% | |
| 18 | FSS | Federal Signal CORP | Stock-Industrials | 2.11% | +1.20% | +118.62% | |
| 19 | GWW | Ww Grainger INC | Stock-Industrials | 2.05% | +0.40% | +12.43% | |
| 20 | CDNS | Cadence Design Sys INC | Stock-Tech | 2.05% | +0.18% | -8.82% | |
| 21 | ORLY | O'reilly Automotive INC | Stock-Consumer Disc | 2.04% | — | -1.18% | |
| 22 | IDXX | Idexx Laboratories INC | Stock-Healthcare | 1.92% | -0.37% | +0.98% | |
| 23 | SHW | Sherwin-williams Co/the | Stock-Materials | 1.92% | +0.02% | +6.05% | |
| 24 | STE | STERIS plc | Stock-Healthcare | 1.85% | — | +3.46% | |
| 25 | LIN | Linde plc | Stock-Materials | 1.78% | -0.04% | +5.13% | |
| 26 | MSI | Motorola Solutions INC | Stock-Tech | 1.74% | — | +6.79% | |
| 27 | AON | Aon plc | Stock-Financials | 1.71% | -0.01% | +9.14% | |
| 28 | CTAS | Cintas CORP | Stock-Industrials | 1.64% | — | -3.42% | |
| 29 | ISRG | Intuitive Surgical INC | Stock-Healthcare | 1.59% | -0.52% | -1.79% | |
| 30 | HD | Home Depot INC | Stock-Consumer Disc | 1.55% | -0.09% | -0.78% | |
| 31 | APD | Air Products & Chemicals INC | Stock-Materials | 1.51% | -0.27% | -5.06% | |
| 32 | ACGL | Arch Capital Group Ltd. | Stock-Financials | 1.50% | — | -1.52% | |
| 33 | SYK | Stryker CORP | Stock-Healthcare | 1.50% | — | +6.41% | |
| 34 | SPGI | S&p Global INC | Stock-Financials | 1.46% | -0.91% | -27.52% | |
| 35 | ITW | Illinois Tool Works | Stock-Industrials | 1.45% | -0.11% | +0.94% | |
| 36 | MCO | Moody's CORP | Stock-Financials | 1.37% | -0.47% | -19.42% | |
| 37 | WCN | Waste Connections INC | Stock-Industrials | 1.28% | -0.07% | +4.16% | |
| 38 | IR | Ingersoll-rand INC | Stock-Industrials | 1.17% | — | +0.92% | |
| 39 | ADP | Automatic Data Processing | Stock-Tech | 1.16% | -0.57% | -31.21% | |
| 40 | TJX | Tjx Companies INC | Stock-Consumer Disc | 1.15% | +0.04% | +22.65% | |
| 41 | WMT | Walmart INC | Stock-Consumer Staples | 1.11% | — | +11.98% | |
| 42 | WSO | Watsco INC | Stock-Industrials | 1.05% | +0.72% | +215.59% | |
| 43 | INTC | Intel CORP | Stock-Tech | 0.98% | +0.63% | — | |
| 44 | ETN | Eaton Corporation plc | Stock-Industrials | 0.86% | +0.86% | NEW | |
| 45 | AJG | Arthur J Gallagher & Co | Stock-Financials | 0.82% | +0.82% | NEW | |
| 46 | WAT | Waters CORP | Stock-Healthcare | 0.61% | +0.61% | NEW | |
| 47 | BRK-A | Berkshire Hathaway Inc-cl A | Stock-Other | 0.49% | — | — | |
| 48 | L | Loews CORP | Stock-Financials | 0.30% | — | — | |
| 49 | XOM | Exxon Mobil CORP | Stock-Energy | 0.22% | -0.21% | -29.14% | |
| 50 | INTU | Intuit INC | Stock-Tech | 0.20% | -1.46% | -78.12% |
Performance for Q3 2026
+5.6%
Performance Last 4 Quarters
+19%
Based on 72% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-06-30 | 67 | $455.8M | 26 | |
| 2026-03-31 | 73 | $404.8M | 20 | |
| 2025-12-31 | 69 | $412.7M | 37 | |
| 2025-09-30 | 72 | $411.3M | 26 | |
| 2025-06-30 | 139 | $390.4M | 0 | |
| 2025-03-31 | 70 | $377.3M | 100 | |
| 2024-12-31 | 73 | $398.7M | 0 | |
| 2024-09-30 | 73 | $423.6M | 0 | |
| 2024-06-30 | 69 | $382.2M | 0 | |
| 2024-03-31 | 68 | $356.8M | 0 | |
| 2023-12-31 | 61 | $362.1M | 0 | |
| 2023-09-30 | 57 | $298.0M | 0 | |
| 2023-06-30 | 58 | $322.5M | 0 | |
| 2023-03-31 | 125 | $286.9M | 0 | |
| 2022-12-31 | 64 | $241.1M | 0 | |
| 2022-09-30 | 65 | $195.9M | 0 | |
| 2022-06-30 | 67 | $239.4M | 0 | |
| 2022-03-31 | 72 | $309.7M | 0 | |
| 2021-12-31 | 80 | $416.4M | 0 | |
| 2021-09-30 | 154 | $354.9M | 0 | |
| 2021-06-30 | 79 | $364.7M | 100 | |
| 2021-03-31 | 78 | $334.7M | 10 | |
| 2020-12-31 | 73 | $331.3M | 18 | |
| 2020-09-30 | 69 | $296.0M | 15 | |
| 2020-06-30 | 69 | $271.3M | 25 | |
| 2020-03-31 | 67 | $218.1M | 34 | |
| 2019-12-31 | 76 | $298.0M | 11 | |
| 2019-09-30 | 74 | $271.7M | 12 | |
| 2019-06-30 | 71 | $264.9M | 12 | |
| 2019-03-31 | 74 | $245.2M | 25 | |
| 2018-12-31 | 69 | $193.6M | 28 | |
| 2018-09-30 | 82 | $253.5M | 10 | |
| 2018-06-30 | 79 | $231.8M | 14 | |
| 2018-03-31 | 76 | $226.5M | 15 | |
| 2017-12-31 | 75 | $226.9M | 14 | |
| 2017-09-30 | 72 | $221.7M | 13 | |
| 2017-06-30 | 75 | $221.7M | 9 | |
| 2017-03-31 | 75 | $216.2M | 17 | |
| 2016-12-31 | 77 | $200.5M | 17 | |
| 2016-09-30 | 78 | $199.7M | 23 | |
| 2016-06-30 | 75 | $189.0M | 9 | |
| 2016-03-31 | 71 | $194.8M | 24 | |
| 2015-12-31 | 76 | $192.1M | 23 | |
| 2015-09-30 | 76 | $179.3M | 16 | |
| 2015-06-30 | 84 | $199.2M | 11 | |
| 2015-03-31 | 85 | $206.5M | 10 | |
| 2014-12-31 | 87 | $203.1M | 13 | |
| 2014-09-30 | 90 | $194.8M | 25 | |
| 2014-06-30 | 95 | $191.7M | 13 | |
| 2014-03-31 | 264 | $196.8M | 16 | |
| 2013-12-31 | 92 | $190.7M | 16 | |
| 2013-09-30 | 89 | $172.5M | 17 | |
| 2013-06-30 | 87 | $169.3M | — |
Carderock Capital Management INC's most significant position changes for 2026-06-30: New buy: Eaton Corporation plc (ETN); New buy: Arthur J Gallagher & Co (AJG); Sold out: Fair Isaac CORP (FICO); New buy: Waters CORP (WAT); Sold out: Johnson & Johnson (JNJ).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | LRCX | Lam Research CORP | +2% | -22.97% | Trim |
| 2 | FTNT | Fortinet INC | +1.2% | +0.32% | Add |
| 3 | FSS | Federal Signal CORP | +1.2% | +118.62% | Add |
| 4 | ETN | Eaton Corporation plc | +0.9% | NEW | New buy |
| 5 | AJG | Arthur J Gallagher & Co | +0.8% | NEW | New buy |
| 6 | WSO | Watsco INC | +0.7% | +215.59% | Add |
| 7 | INTC | Intel CORP | +0.6% | — | Unchanged |
| 8 | WAT | Waters CORP | +0.6% | NEW | New buy |
| 9 | HEI | Heico CORP | +0.6% | +6.81% | Add |
| 10 | APH | Amphenol Corp-cl A | +0.6% | -6.06% | Trim |
| 11 | MNST | Monster Beverage CORP | +0.5% | +6.73% | Add |
| 12 | LLY | Eli Lilly & Co | +0.5% | +1.88% | Add |
| 13 | GWW | Ww Grainger INC | +0.4% | +12.43% | Add |
| 14 | GOOGL | Alphabet Inc-cl A | +0.3% | -2.24% | Trim |
| 15 | CDNS | Cadence Design Sys INC | +0.2% | -8.82% | Trim |
| 16 | NVDA | Nvidia CORP | +0.2% | +5.47% | Add |
| 17 | CMG | Chipotle Mexican Grill INC | +0.1% | +119.95% | Add |
| 18 | TJX | Tjx Companies INC | 0% | +22.65% | Add |
| 19 | AME | Ametek INC | 0% | +0.76% | Add |
| 20 | SHW | Sherwin-williams Co/the | 0% | +6.05% | Add |
| 21 | AAPL | Apple INC | — | -1.52% | Trim |
| 22 | PWR | Quanta Services INC | — | -14.20% | Trim |
| 23 | AON | Aon plc | 0% | +9.14% | Add |
| 24 | MPWR | Monolithic Power Systems INC | 0% | -11.69% | Trim |
| 25 | LIN | Linde plc | 0% | +5.13% | Add |
| 26 | HON | Honeywell International INC | -0.1% | EXIT | Sold out |
| 27 | BMY | Bristol-myers Squibb Co | -0.1% | EXIT | Sold out |
| 28 | DVY | Ishares Select Dividend ETF | -0.1% | EXIT | Sold out |
| 29 | WCN | Waste Connections INC | -0.1% | +4.16% | Add |
| 30 | GIS | General Mills INC | -0.1% | EXIT | Sold out |
| 31 | DLR | Digital Realty Trust INC | -0.1% | EXIT | Sold out |
| 32 | JNJ | Johnson & Johnson | -0.1% | EXIT | Sold out |
| 33 | CVX | Chevron CORP | -0.1% | -14.35% | Trim |
| 34 | MA | Mastercard INC - A | -0.1% | +6.07% | Add |
| 35 | HD | Home Depot INC | -0.1% | -0.78% | Trim |
| 36 | ITW | Illinois Tool Works | -0.1% | +0.94% | Add |
| 37 | PH | Parker Hannifin CORP | -0.1% | -1.83% | Trim |
| 38 | COST | Costco Wholesale CORP | -0.2% | +11.37% | Add |
| 39 | XOM | Exxon Mobil CORP | -0.2% | -29.14% | Trim |
| 40 | MSFT | Microsoft CORP | -0.2% | +1.88% | Add |
| 41 | APD | Air Products & Chemicals INC | -0.3% | -5.06% | Trim |
| 42 | IDXX | Idexx Laboratories INC | -0.4% | +0.98% | Add |
| 43 | MCO | Moody's CORP | -0.5% | -19.42% | Trim |
| 44 | ISRG | Intuitive Surgical INC | -0.5% | -1.79% | Trim |
| 45 | ADP | Automatic Data Processing | -0.6% | -31.21% | Trim |
| 46 | FICO | Fair Isaac CORP | -0.7% | EXIT | Sold out |
| 47 | SPGI | S&p Global INC | -0.9% | -27.52% | Trim |
| 48 | DHR | Danaher CORP | -1.1% | -95.65% | Trim |
| 49 | LDOS | Leidos Holdings INC | -1.2% | -82.61% | Trim |
| 50 | INTU | Intuit INC | -1.5% | -78.12% | Trim |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-06-30 | 2026-07-07 | 13F-HR | View on EDGAR |
| 2026-03-31 | 2026-04-10 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-01-09 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-10-17 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-07-10 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-27 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-01-15 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-10-16 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-07-22 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-04-23 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-01-23 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-10-23 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-07-25 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-04-19 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-01-20 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-04 | Amendment | View on EDGAR |
| 2022-09-30 | 2022-10-21 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-07-21 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-04-28 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-01-31 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-10-29 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-07-30 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-07 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-05 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-10-27 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-04 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-11 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-04 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-10-24 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-07-15 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-04-23 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-14 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-13 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-07-16 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-04-27 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-01-25 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-15 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-10 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-04-18 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-08 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-02 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-15 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-03 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-11 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-04 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-07-31 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-04-28 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-11 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-06 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-06 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-09 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-11 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-14 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-02 | 13F-HR | View on EDGAR |
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