Q3 2026 13F · SEC CIK 1164632

Chesley Taft & Associates LLC

Wealth managerFiled 2026-10-13 for Q3 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $2.6B
Reported positions: 365
Top holdings a year, 3 yrs: +21.6%
Assets under management: $3.0B

Chesley Taft & Associates LLC is a wealth manager that reported 365 positions worth $2.6B in its Q3 2026 13F, filed 2026-10-13. Its largest holdings were Alphabet Inc (GOOG, 5.4%), Microsoft Corp (MSFT, 4.3%), Nvidia Corporation (NVDA, 4.1%). A portfolio copying its top holdings returned 21.6% a year over the last 3 years, against 20.4% for the S&P 500.

Chesley Taft & Associates LLC holdings largest 50 of 365 positions.

Weights are shares of the filer's total reported 13F value, compared with Q2 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.

Chesley Taft & Associates LLC 13F holdings
Stock	% of 13F value	Q2 2026	Shares	Share change	Reported value
GOOGAlphabet Inc	5.4%	5.8%	409,124	-2.2%	$139.4M
MSFTMicrosoft Corp	4.3%	3.2%	213,746	-1.6%	$109.6M
NVDANvidia Corporation	4.1%	3.6%	463,267	-0.3%	$105.8M
AAPLApple Inc	3.6%	3.2%	278,953	-1.9%	$92.9M
AMZNAmazon Com Inc	3.3%	3.2%	336,775	-1.0%	$83.9M
AVGOBroadcom Inc	2.9%	3.1%	211,031	-0.9%	$74.1M
PANWPalo Alto Networks Inc	2.4%	2.4%	157,154	-13.7%	$62.4M
COSTCostco Wholesale Corporation	2.3%	2.4%	64,951	-1.6%	$59.1M
JPMJpmorgan Chase & Co	2.2%	2.2%	168,747	-1.4%	$55.8M
JNJJohnson & Johnson	2.2%	2.1%	208,339	-0.7%	$55.2M
IXUSIshares Tr	2.0%	2.0%	550,684	+1.9%	$52.3M
IJRIshares Tr	1.9%	2.1%	366,778	-1.3%	$49.9M
SPYState Str Spdr S&p 500 ETF T	1.8%	1.8%	60,649	-1.3%	$46.3M
VVisa Inc	1.7%	1.6%	121,436	-0.9%	$43.6M
IJHIshares Tr	1.7%	1.8%	601,627	-0.1%	$43.3M
SYKStryker Corporation	1.5%	1.7%	137,980	-0.6%	$38.0M
GLDSpdr Gold Tr	1.5%	1.3%	99,356	+6.1%	$37.8M
GOOGLAlphabet Inc	1.3%	1.4%	98,667	-2.1%	$33.9M
CBChubb Limited	1.3%	1.4%	104,214	+0.5%	$33.9M
APHAmphenol Corp	1.3%	1.4%	393,350	+94.7%	$33.2M
TMOThermo Fisher Scientific Inc	1.1%	0.8%	42,278	-0.1%	$28.5M
MAMastercard Incorporated	1.1%	1.0%	50,818	+0.6%	$28.0M
ABTAbbott Laboratories	1.1%	1.0%	282,519	+1.0%	$27.9M
METAMeta Platforms Inc	1.0%	0.8%	36,394	-2.3%	$26.4M
VEAVanguard Ftse Developed Markets Index Fu	1.0%	1.0%	361,112	+1.7%	$25.5M
AXPAmerican Express Co	1.0%	1.1%	81,243	-0.8%	$24.7M
IVVIshares Tr	0.9%	1.0%	31,191	-6.6%	$23.9M
LLYEli Lilly & Co	0.9%	0.9%	20,302	-0.2%	$23.5M
RTXRtx Corporation	0.9%	0.9%	125,803	+1.1%	$23.4M
KOCoca Cola Co	0.9%	0.8%	264,146	-1.3%	$22.7M
VEUVanguard Intl Equity Index F	0.8%	0.9%	259,794	-1.3%	$21.6M
COFCapital One Finl Corp	0.8%	0.8%	110,914	+2.0%	$21.4M
ORCLOracle Corp	0.8%	0.8%	146,265	-0.6%	$20.1M
PEPPepsico Inc	0.8%	0.9%	157,864	-2.6%	$20.0M
CCitigroup Inc	0.8%	0.8%	153,002	+0.6%	$19.8M
WMWaste Mgmt Inc Del	0.8%	0.8%	94,353	+2.0%	$19.2M
ITWIllinois Tool Wks Inc	0.7%	0.8%	73,883	-0.7%	$19.0M
AZOAutozone Inc	0.7%	0.8%	6,599	+0.5%	$18.7M
CRMSalesforce Inc	0.7%	—	79,545	—	$18.3M
WFCWells Fargo & Co	0.7%	0.7%	213,495	-2.6%	$17.1M
ACNAccenture PLC Ireland	0.6%	—	89,447	—	$16.4M
JMUBJ P Morgan Exchange Traded F	0.6%	0.6%	331,298	+6.1%	$15.8M
JMSTJ P Morgan Exchange Traded F	0.6%	0.6%	301,115	+5.5%	$15.2M
DISDisney Walt Co	0.6%	0.5%	141,913	-2.0%	$14.9M
AZNAstrazeneca PLC	0.6%	0.6%	91,361	+12.4%	$14.8M
EQTEqt Corp	0.6%	0.7%	300,828	-12.4%	$14.6M
UNPUnion Pac Corp	0.6%	—	53,202	—	$14.5M
HONAHoneywell Aerospace Inc	0.6%	—	93,068	—	$14.4M
EFAIshares Tr	0.6%	0.5%	135,428	+0.0%	$14.1M
MUBIshares Tr	0.5%	0.6%	134,801	-3.0%	$13.6M

What Chesley Taft & Associates LLC bought and sold in Q3 2026, against Q2 2026.

New positions

Q2 2026's filing was too long to tell new positions apart.

Added to

APH Amphenol Corp+94.7% shares
AZN Astrazeneca PLC+12.4% shares
JMUB J P Morgan Exchange Traded F+6.1% shares
GLD Spdr Gold Tr+6.1% shares
JMST J P Morgan Exchange Traded F+5.5% shares

Reduced

PANW Palo Alto Networks Inc-13.7% shares
EQT Eqt Corp-12.4% shares
IVV Ishares Tr-6.6% shares

Left the top 50

Share counts compared with the Q2 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: +22.4% /yr; S&P 500 +20.1%
3 years: +21.6% /yr; S&P 500 +20.4%
5 years: +11.3% /yr; S&P 500 +11.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 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
Q3 2026	$2.6B	365
Q2 2026	$2.6B	369
Q1 2026	$2.4B	370
Q4 2025	$2.5B	371
Q3 2025	$2.4B	348
Q2 2025	$2.2B	334
Q1 2025	$2.1B	330
Q4 2024	$2.2B	326
Q3 2024	$2.1B	323
Q2 2024	$2.0B	309
Q1 2024	$2.0B	311
Q4 2023	$1.8B	301

Questions about Chesley Taft & Associates LLC's portfolio

What stocks does Chesley Taft & Associates LLC own?

Chesley Taft & Associates LLC's latest 13F, for Q3 2026 and filed Oct 13, 2026, lists 365 positions worth $2.6B. The largest are Alphabet Inc (GOOG) at 5.4%, Microsoft Corp (MSFT) at 4.3%, Nvidia Corporation (NVDA) at 4.1%, Apple Inc (AAPL) at 3.6% and Amazon Com Inc (AMZN) at 3.3%.

What did Chesley Taft & Associates LLC buy last quarter?

In Q3 2026, Chesley Taft & Associates LLC added Amphenol Corp (APH) (+94.7% shares), Astrazeneca PLC (AZN) (+12.4% shares) and J P Morgan Exchange Traded F (JMUB) (+6.1% shares), compared with its Q2 2026 filing.

What did Chesley Taft & Associates LLC sell last quarter?

In Q3 2026, Chesley Taft & Associates LLC cut from its top 50 Home Depot Inc (HD), cut from its top 50 Uber Technologies Inc (UBER), cut from its top 50 Exxon Mobil Corp (XOM), cut from its top 50 Select Sector Spdr Tr (XLF), Palo Alto Networks Inc (PANW) (-13.7% shares), Eqt Corp (EQT) (-12.4% shares) and Ishares Tr (IVV) (-6.6% shares), compared with its Q2 2026 filing.

How has Chesley Taft & Associates LLC's portfolio performed?

A portfolio copying Chesley Taft & Associates LLC's 20 largest 13F holdings each quarter, from the day each filing was public, returned +21.6% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +22.4% against +20.1%. Over 5 years: +11.3% a year against +11.6%.

When is Chesley Taft & Associates LLC's next 13F filing due?

13F filings are due 45 days after each quarter ends. Chesley Taft & Associates LLC's filing for the quarter ending Dec 31, 2026 is due by Feb 14, 2027; this page updates the day after it is published.

How much money does Chesley Taft & Associates LLC manage?

Chesley Taft & Associates LLC reported $3.0B of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $2.6B.