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Carderock Capital Management Inc.

CIK 1168889 · latest 13F filed 22 October 2026 · Read the filing on EDGAR

Carderock Capital Management Inc. reported 70 US-listed holdings worth $435.3 million in its 13F for the quarter ended 30 September 2026, filed 22 October 2026. Its largest: Lam Research Corp. (4.8%), Alphabet Inc. (4.5%) and Apple Inc. (3.9%). Against the quarter before, it opened 7 positions, added to 17, trimmed 32 and sold out of 4.

Reported holdings$435.3M-4.5% on Q2 2026
Positions70+3 on Q2 2026
The largest ten36.7%of its reported holdings
Latest 13FQ3 2026filed 22 October 2026
Where the money is
Added toTrimmed
LRCX4.8%GOOGL4.5%AAPL3.9%APH3.9%MSFT3.5%LLY3.4%FTNT3.3%TMO3.3%MA3.3%NVDA2.9%MPWR2.8%HEI2.7%AME2.6%56 more52.5%

The 14 largest of its 70 positions, each sized by its share of the reported holdings, coloured by the change in shares against Q2 2026.

Reported holdings, quarter by quarter
Q3 2024: $423.6 million in 73 positions$424MQ3 24Q4 2024: $398.7 million in 73 positions$399MQ4 24Q1 2025: $377.3 million in 70 positions$377MQ1 25Q2 2025: $390.4 million in 139 positions$390MQ2 25Q3 2025: $411.3 million in 72 positions$411MQ3 25Q4 2025: $412.7 million in 69 positions$413MQ4 25Q1 2026: $404.8 million in 73 positions$405MQ1 26Q2 2026: $455.8 million in 67 positions$456MQ2 26Q3 2026: $435.3 million in 70 positions$435MQ3 26

What the fund reported holding at each quarter's end; hover a bar for the number of positions

What its reported holdings returned

Held through each quarter, the holdings it reported returned +14.3% over the 8 quarters to 30 September 2026, against +32.9% for the S&P 500.

Its reported holdingsThe S&P 500
100110120130Q3 24Q4 24Q1 25Q2 25Q3 25Q4 25Q1 26Q2 26Q3 26Its holdings +14.3%S&P 500 +32.9%

Not the fund's own return: each 13F's holdings are kept unchanged until the next one, so trades inside a quarter, dividends, cash and fees are left out. A rough guide to how its picks have done over time.

What it did on the quarter

Opened 7Added 17Held 14Trimmed 32Sold out 4
Opened: 7Added: 17Held: 14Trimmed: 32Sold out: 4

Its positions against its 13F for the quarter to 30 June 2026; a change under 0.1% of a position counts as held

Opened 7

  1. Amazon.com Inc. AMZN$1.9 million
  2. ExxonMobil Holdings Corp. XOM$1.2 million
  3. Broadridge Financial Solutions, Inc. BR$1.1 million
  4. Vulcan Materials Co. VMC$904,152
  5. AstraZeneca PLC AZN$691,415
  6. Cummins Inc. CMI$611,619
  7. HCA Healthcare, Inc. HCA$504,407

Added to 17

  1. Waters Corp. WAT+6,987 shares · +94%
  2. Microsoft Corp. MSFT+2,521 shares · +9%
  3. Arthur J. Gallagher & Co. AJG+4,617 shares · +28%
  4. Eaton Corp. plc ETN+2,037 shares · +22%
  5. Mastercard Inc. MA+1,367 shares · +6%
  6. Thermo Fisher Scientific Inc. TMO+529 shares · +3%
  7. Motorola Solutions, Inc. MSI+750 shares · +4%
  8. Moody's Corp. MCO+443 shares · +3%

and 9 more in the table below

Trimmed 32

  1. Lam Research Corp. LRCX-10,158 shares · -14%
  2. Home Depot, Inc. HD-8,453 shares · -42%
  3. Fortinet, Inc. FTNT-10,159 shares · -11%
  4. Monolithic Power Systems, Inc. MPWR-1,247 shares · -12%
  5. Quanta Services, Inc. PWR-2,095 shares · -11%
  6. Intuitive Surgical Inc. ISRG-2,905 shares · -16%
  7. Amphenol Corp. APH-13,687 shares · -6%
  8. Parker-Hannifin Corp. PH-1,092 shares · -10%

and 24 more in the table below

Sold out of 4

  1. Watsco Inc. WSO$4.8 million last quarter
  2. ExxonMobil Holdings Corp. XOM$988,896 last quarter
  3. Leidos Holdings, Inc. LDOS$643,665 last quarter
  4. Autozone Inc. AZO$207,736 last quarter

What it holds

CompanySharesValueOf its bookChange in shares
Lam Research Corp. LRCX63.6K$20.9 million4.80%-10.2K
Alphabet Inc. GOOGL56.3K$19.4 million4.45%-153
Apple Inc. AAPL51.0K$17.0 million3.90%-946
Amphenol Corp. APH199.5K$16.8 million3.86%-13.7K
Microsoft Corp. MSFT30.0K$15.4 million3.53%+2.5K
Eli Lilly & Co. LLY12.7K$14.7 million3.37%-139
Fortinet, Inc. FTNT81.2K$14.5 million3.34%-10.2K
Thermo Fisher Scientific Inc. TMO21.4K$14.4 million3.32%+529
Mastercard Inc. MA25.7K$14.2 million3.26%+1.4K
NVIDIA Corp. NVDA55.3K$12.6 million2.90%-1.2K
Monolithic Power Systems, Inc. MPWR9.1K$12.2 million2.80%-1.2K
Heico Corp. New HEI39.1K$11.8 million2.72%-1.0K
AMETEK Inc. AME46.5K$11.5 million2.65%+662
Quanta Services, Inc. PWR17.5K$11.3 million2.59%-2.1K
Monster Beverage Corp. MNST246.9K$10.3 million2.36%-1.8K
Costco Wholesale Corp. COST10.8K$9.9 million2.26%+9
Parker-Hannifin Corp. PH10.0K$9.6 million2.20%-1.1K
Motorola Solutions, Inc. MSI19.8K$8.8 million2.03%+750
Cintas Corp. CTAS44.5K$8.7 million1.99%+525
IDEXX Laboratories Inc. IDXX16.6K$8.7 million1.99%-18
O'Reilly Automotive, Inc. ORLY100.4K$8.6 million1.97%-669
Federal Signal Corp. FSS76.2K$8.4 million1.94%+1.4K
Steris plc STE39.8K$8.4 million1.92%-324
Sherwin Williams Co. SHW25.0K$8.1 million1.86%-368
Cadence Design Systems Inc. CDNS23.7K$7.8 million1.80%-1.2K
W.W. Grainger, Inc. GWW6.2K$7.7 million1.77%-679
Linde plc LIN15.8K$7.5 million1.72%+190
Arch Capital Group Ltd. ACGL71.5K$6.6 million1.52%+1.1K
S&P Global Inc. SPGI16.6K$6.5 million1.50%+221
Illinois Tool Works Inc. ITW25.1K$6.5 million1.48%+659
Moody's Corp. MCO14.2K$6.4 million1.48%+443
Waters Corp. WAT14.4K$6.3 million1.45%+7.0K
Intuitive Surgical Inc. ISRG15.3K$6.2 million1.43%-2.9K
Air Products & Chemicals, Inc. APD21.7K$6.0 million1.38%-1.8K
Automatic Data Processing Inc. ADP23.2K$6.0 million1.37%-469
Stryker Corp. SYK21.5K$5.9 million1.36%-179
Aon plc AON20.9K$5.8 million1.33%-2.7K
Waste Connections Inc. WCN35.5K$5.5 million1.25%+447
Ingersoll Rand Inc. IR67.6K$5.1 million1.17%+2.3K
Eaton Corp. plc ETN11.2K$4.8 million1.11%+2.0K
Arthur J. Gallagher & Co. AJG20.9K$4.8 million1.10%+4.6K
Walmart Inc. WMT44.1K$4.6 million1.05%-749
TJX Companies Inc. TJX29.2K$3.9 million0.89%-5.3K
Intel Corp. INTC32.0K$3.8 million0.88%no change
Home Depot, Inc. HD11.6K$3.3 million0.76%-8.5K
Berkshire Hathaway Inc. Del3$2.2 million0.51%no change
Amazon.com Inc. AMZN7.7K$1.9 million0.44%new
Loews Corp. L12.0K$1.3 million0.29%no change
ExxonMobil Holdings Corp. XOM7.2K$1.2 million0.27%new
Broadridge Financial Solutions, Inc. BR6.9K$1.1 million0.26%new
Intuit Inc. INTU3.4K$924,4560.21%-54
Vulcan Materials Co. VMC3.7K$904,1520.21%new
iShares Trust IYW2.9K$761,5880.17%no change
Chevron Corp. CVX3.5K$721,2700.17%-50
AstraZeneca PLC AZN4.3K$691,4150.16%new
Church & Dwight Co. Inc. CHD7.1K$671,3180.15%-1.8K
Marriott International Inc. MAR1.8K$646,6080.15%no change
Cummins Inc. CMI1.2K$611,6190.14%new
Berkshire Hathaway Inc. Class B BRKB1.2K$597,5400.14%no change
Darden Restaurants Inc. DRI3.0K$579,7500.13%no change
JPMorgan Chase & Co. JPM1.6K$528,3360.12%-54
HCA Healthcare, Inc. HCA1.2K$504,4070.12%new
Chipotle Mexican Grill Inc. CMG13.4K$428,1940.10%-2.2K
T. Rowe Price Group, Inc. TROW3.5K$358,9730.08%no change
WD-40 Co. WDFC1.5K$302,9550.07%no change
Paychex Inc. PAYX3.0K$290,5750.07%no change
CSX Corp. CSX5.7K$265,1070.06%no change
Coca-Cola Co. KO2.9K$245,3280.06%no change
Danaher Corp. DHR1.1K$242,5970.06%-11
DNP Select Income FD Inc. DNP23.6K$225,8900.05%no change
Every US-listed position in the fund's 13F for the quarter ended 30 September 2026, by the value it reported.
Read moreChange is shares against its 13F for the quarter before; the 4 it sold out of are in the box above.