Q2 2026 13F · SEC CIK 1168889

Carderock Capital Management Inc

Wealth managerFiled 2026-07-07 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $455.8M
Reported positions: 67
Top holdings a year, 3 yrs: +19.6%
Assets under management: $677.0M

Carderock Capital Management Inc is a wealth manager that reported 67 positions worth $455.8M in its Q2 2026 13F, filed 2026-07-07. Its largest holdings were Lam Research Corp (LRCX, 7.0%), Alphabet Inc (GOOGL, 4.4%), Amphenol Corp (APH, 4.1%). A portfolio copying its top holdings returned 19.6% a year over the last 3 years, against 20.4% for the S&P 500.

Carderock Capital Management Inc holdings largest 50 of 67 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Carderock Capital Management Inc 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
LRCXLam Research Corp	7.0%	5.1%	73,797	-23.0%	$32.0M
GOOGLAlphabet Inc	4.4%	4.1%	56,486	-2.2%	$20.2M
APHAmphenol Corp	4.1%	3.5%	106,575	-6.1%	$18.8M
LLYLilly Eli & Co	3.4%	2.9%	12,818	+1.9%	$15.4M
AAPLApple Inc	3.3%	3.3%	51,909	-1.5%	$15.0M
HEIHeico Corp New	3.1%	2.5%	40,081	+6.8%	$14.3M
MPWRMonolithic Power Systms Inc	3.1%	3.2%	10,301	-11.7%	$14.2M
PWRQuanta Svcs Inc Com	3.1%	3.1%	19,621	-14.2%	$14.1M
FTNTFortinet Inc	3.1%	1.8%	91,400	+0.3%	$14.0M
MAMastercard Inc.	2.7%	2.8%	24,357	+6.1%	$12.5M
MNSTMonster Beverage Corp New	2.6%	2.1%	124,341	+6.7%	$12.0M
NVDANvidia Corporation Com	2.5%	2.3%	56,544	+5.5%	$11.3M
AMEAmetek Inc	2.4%	2.4%	45,841	+0.8%	$11.1M
PHParker-Hannifin Corp	2.4%	2.5%	11,112	-1.8%	$10.9M
TMOThermo Fisher Scientific Inc	2.3%	2.6%	20,860	-1.9%	$10.5M
MSFTMicrosoft Corp	2.2%	2.5%	27,435	+1.9%	$10.2M
COSTCostco Whsl Corp New	2.2%	2.4%	10,821	+11.4%	$10.1M
FSSFederal Signal Corp	2.1%	0.9%	74,774	+118.6%	$9.6M
GWWWw Grainger Inc	2.1%	1.6%	6,874	+12.4%	$9.4M
CDNSCadence Design System Inc	2.0%	1.9%	24,899	-8.8%	$9.3M
ORLYO'Reilly Automotive Inc	2.0%	2.3%	101,093	-1.2%	$9.3M
IDXXIdexx Labs Inc	1.9%	2.3%	16,627	+1.0%	$8.8M
SHWSherwin Williams Co Com	1.9%	1.9%	25,398	+6.1%	$8.7M
STESteris Corp	1.9%	2.1%	40,090	+3.5%	$8.4M
LINLinde PLC	1.8%	1.8%	15,606	+5.1%	$8.1M
MSIMotorola Solutions Inc	1.7%	1.9%	19,069	+6.8%	$7.9M
AONAon PLC	1.7%	1.7%	23,559	+9.1%	$7.8M
CTASCintas Corp	1.6%	1.9%	43,970	-3.4%	$7.5M
ISRGIntuitive Surgical Inc	1.6%	2.1%	18,207	-1.8%	$7.2M
HDHome Depot Inc Com	1.6%	1.6%	20,032	-0.8%	$7.1M
APDAir Products and Chemicals Inc	1.5%	1.8%	23,505	-5.1%	$6.9M
ACGLArch Capital Group Ltd	1.5%	1.7%	70,348	-1.5%	$6.8M
SYKStryker Corporation	1.5%	1.7%	21,642	+6.4%	$6.8M
SPGIS&P Global Inc.	1.5%	2.4%	16,357	-27.5%	$6.7M
ITWIllinois Tool Works Inc.	1.4%	1.6%	24,420	+0.9%	$6.6M
MCOMoodys Corp	1.4%	1.8%	13,750	-19.4%	$6.2M
WCNWaste Connections Inc	1.3%	1.3%	35,027	+4.2%	$5.8M
IRIngersoll Rand Inc	1.2%	1.3%	65,223	+0.9%	$5.3M
ADPAutomatic Data Processing Inc Com	1.2%	1.7%	23,646	-31.2%	$5.3M
TJXTjx Cos Inc New Com	1.1%	1.1%	34,486	+22.6%	$5.2M
WMTWalmart Inc	1.1%	1.2%	44,837	+12.0%	$5.1M
WSOWatsco Inc	1.1%	0.3%	11,519	+215.6%	$4.8M
INTCIntel Corp	1.0%	0.3%	32,000	+0.0%	$4.5M
ETNEaton Corp PLC	0.9%	—	9,160	—	$3.9M
AJGGallagher Arthur J & Co	0.8%	—	16,330	—	$3.7M
WATWaters Corp.	0.6%	—	7,417	—	$2.8M
BRK-ABerkshire Hathaway Inc Del	0.5%	0.5%	3	+0.0%	$2.2M
LLoews Corp	0.3%	0.3%	12,000	+0.0%	$1.4M
XOMExxon Mobil Corp	0.2%	0.4%	7,233	-29.1%	$989K
INTUIntuit	0.2%	1.7%	3,407	-78.1%	$889K

What Carderock Capital Management Inc bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Added to

WSO Watsco Inc+215.6% shares
FSS Federal Signal Corp+118.6% shares
TJX Tjx Cos Inc New Com+22.6% shares
GWW Ww Grainger Inc+12.4% shares
WMT Walmart Inc+12.0% shares
COST Costco Whsl Corp New+11.4% shares
AON Aon PLC+9.1% shares
HEI Heico Corp New+6.8% shares

Reduced

INTU Intuit-78.1% shares
ADP Automatic Data Processing Inc Com-31.2% shares
XOM Exxon Mobil Corp-29.1% shares
SPGI S&P Global Inc.-27.5% shares
LRCX Lam Research Corp-23.0% shares
MCO Moodys Corp-19.4% shares
PWR Quanta Svcs Inc Com-14.2% shares
MPWR Monolithic Power Systms Inc-11.7% shares

Left the top 50

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +25.9% /yr; S&P 500 +20.1%
3 years: +19.6% /yr; S&P 500 +20.4%
5 years: +9.1% /yr; S&P 500 +11.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value and rebuilt each quarter on the day the filing became public. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$455.8M	67
Q1 2026	$404.8M	73
Q4 2025	$412.7M	69
Q3 2025	$411.3M	72
Q2 2025	$390.4M	139
Q1 2025	$377.3M	70
Q4 2024	$398.7M	73
Q3 2024	$423.6M	73
Q2 2024	$382.2M	69
Q1 2024	$356.8M	68
Q4 2023	$362.1M	61
Q3 2023	$298.0M	57

Questions about Carderock Capital Management Inc's portfolio

What stocks does Carderock Capital Management Inc own?

Carderock Capital Management Inc's latest 13F, for Q2 2026 and filed Jul 7, 2026, lists 67 positions worth $455.8M. The largest are Lam Research Corp (LRCX) at 7.0%, Alphabet Inc (GOOGL) at 4.4%, Amphenol Corp (APH) at 4.1%, Lilly Eli & Co (LLY) at 3.4% and Apple Inc (AAPL) at 3.3%.

What did Carderock Capital Management Inc buy last quarter?

In Q2 2026, Carderock Capital Management Inc added Watsco Inc (WSO) (+215.6% shares), Federal Signal Corp (FSS) (+118.6% shares) and Tjx Cos Inc New Com (TJX) (+22.6% shares), compared with its Q1 2026 filing.

What did Carderock Capital Management Inc sell last quarter?

In Q2 2026, Carderock Capital Management Inc cut from its top 50 Leidos Holdings Inc (LDOS), cut from its top 50 Danaher Corporation (DHR), cut from its top 50 Fair Isaac Corp (FICO), Intuit (INTU) (-78.1% shares), Automatic Data Processing Inc Com (ADP) (-31.2% shares) and Exxon Mobil Corp (XOM) (-29.1% shares), compared with its Q1 2026 filing.

How has Carderock Capital Management Inc's portfolio performed?

A portfolio copying Carderock Capital Management Inc's 20 largest 13F holdings each quarter, from the day each filing was public, returned +19.6% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +25.9% against +20.1%. Over 5 years: +9.1% a year against +11.6%.

When is Carderock Capital Management Inc's next 13F filing due?

13F filings are due 45 days after each quarter ends. Carderock Capital Management Inc's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does Carderock Capital Management Inc manage?

Carderock Capital Management Inc reported $677.0M of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $455.8M.