Chesley Taft & Associates LLC

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CIK 1164632

13F portfolio (2026-Q1)

$2.4B

Positions

370

Implied 1Y CAGR

modeled · as filed

Long positions in SEC Section 13(f) securities (US-listed stocks, ADRs and ETFs), largest first · Δ vs 2025-Q4. A lagged quarterly snapshot (filed ≤45 days after quarter-end); excludes shorts, options, cash, and shares listed only on non-US exchanges — foreign companies held via a US listing or ADR (e.g. Alibaba, TSMC) ARE included.

Implied return what this book implies · modeled, not advice methodology →

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As filed = each book applied at its quarter-end (what the reported book did) · As copyable = applied at its statutory 45-day filing deadline (what a 13F follower could have earned).

Computing…

Hypothetical modeled performance constructed with hindsight — not actual results, and not indicative of future results. See the Disclaimer.

Exposures · what this manager owns, by sector & size (2026-Q1)

Holdings

370

Top 5

18.2%

Top 10

30.1%

Effective N

66.1

HHI

0.015

This quarter

24 new · 0 exit →

By sector

Unclassified23.1%

Information Technology20.6%

Financials13.3%

Consumer Discretionary10.0%

Communication Services8.7%

Health Care8.4%

Industrials7.2%

Energy2.5%

Other6.1%

By market cap

Mega (>$200B)46.8%

Large ($10–200B)28.6%

Unknown24.1%

Mid ($2–10B)0.5%

Small ($300M–2B)0.0%

By region

North America75.9%

Other23.1%

Europe1.0%

Middle East0.0%

By industry group GICS — finer than sector

Industry group	Weight	Names
Unclassified	23.15%	117
Specialty Retail	8.53%	13
Semiconductors & Semiconductor Equipment	8.01%	15
Software & IT Services	7.50%	7
Technology Hardware & Equipment	6.18%	15
Banks	6.15%	11
Pharmaceuticals & Biotechnology	6.10%	14
Commercial Services & Supplies	5.49%	12
Software	5.41%	9
Insurance	2.83%	16
Oil, Gas & Consumable Fuels	2.53%	10
Health Care Equipment & Supplies	2.21%	5
Aerospace & Defense	2.08%	7
Beverages	1.95%	2
Chemicals	1.81%	10
Capital Markets	1.63%	11
Machinery	1.40%	12
Utilities	1.21%	18
Hotels, Restaurants & Leisure	0.70%	5
Electrical Equipment & Components	0.67%	5
Distributors	0.64%	4
Road & Rail	0.62%	5
Entertainment	0.60%	1
Media & Entertainment	0.47%	2
Equity Real Estate Investment Trusts (REITs)	0.47%	7
Diversified Telecommunication Services	0.39%	3
Food Products	0.29%	6
Metals & Mining	0.18%	4
Automobiles & Components	0.13%	3
Tobacco	0.10%	2
Communications Equipment	0.10%	2
Transportation Infrastructure	0.08%	1
Airlines	0.07%	3
Health Care Providers & Services	0.07%	2
Life Sciences Tools & Services	0.05%	2
Agricultural Products	0.05%	1
Diversified Consumer Services	0.03%	1
Paper & Forest Products	0.03%	1
Professional Services	0.02%	1
Construction & Engineering	0.02%	1
Marine	0.01%	1
Textiles, Apparel & Luxury Goods	0.01%	1
Construction Materials	0.01%	1
Food & Staples Retailing	0.01%	1

Top holdings

#	Ticker	Name	Sector	Weight
1	GOOG	Alphabet Inc.	Communication Services	5.11%
2	MSFT	MICROSOFT CORP	Information Technology	3.68%
3	NVDA	NVIDIA CORP	Information Technology	3.45%
4	AAPL	Apple Inc.	Information Technology	3.02%
5	AMZN	AMAZON COM INC	Consumer Discretionary	2.96%
6	AVGO	Broadcom Inc.	Information Technology	2.83%
7	COST	COSTCO WHOLESALE CORP /NEW	Consumer Discretionary	2.80%
8	JPM	JPMORGAN CHASE & CO	Financials	2.15%
9	JNJ	JOHNSON & JOHNSON	Health Care	2.15%
10	IJR	ISHARES TR	Unclassified	1.92%

254/370 names classified · sector 76.9% of weight · industry 76.9% · mkt cap 75.9%; unclassified names shown, never dropped.

Sector allocation over time · how the GICS mix & top names shifted quarter by quarter

top 5/sector, rest → “Other” · 52 quarters

Information TechnologyMSFT, AAPL, AVGO, GE, NVDA · other

FinancialsJPM, V, UNH, WFC, TFC · other

Health CareJNJ, SYK, ABT, MRK, GILD · other

IndustrialsACN, HON, UNP, MMM, FISV · other

Consumer DiscretionaryAMZN, COST, HD, MCK, LKQ · other

Communication ServicesGOOG, DIS, META, GOOGL, VZ · other

Consumer StaplesPEP, KO, PM, CVS, KHC · other

MaterialsECL, CHD, APD, PG, NKE · other

EnergyXOM, CVX, HAL, MPC, EQT · other

UtilitiesNEE, OKE, D, AWK, SO · other

Real EstateWY, CCI, PSA, WELL, JLL · other

UnclassifiedIJR, IJH, EXPRESS SCRIPTS HLDG CO, CELGENE CORP, Alphabet CL C · other

Sector is classified on each name's CURRENT fundamentals, not point-in-time — apparent sector drift can reflect the market re-rating a holding, not a manager trade. 13F is a lagged quarterly snapshot of long positions in US-listed securities only — foreign companies held via a US listing or ADR ARE included, but shares listed only on non-US exchanges (plus shorts, options and cash) are not. Latest quarter: 76.9% of the book is sector-classified (unclassified names shown, never dropped).

Style box · size × value-growth placement of the reported book (2026-Q1), classified on current fundamentals (not point-in-time) — load it into PORT to overlay your own portfolio

holdings, colored by sector (233 classified)Chesley Taft & Associates LLC centroid (Large Core)

Information TechnologyFinancialsConsumer DiscretionaryCommunication ServicesHealth CareIndustrialsEnergyConsumer StaplesMaterialsUtilitiesReal Estate

Style box summary for Chesley Taft & Associates LLC: centroid Large Core. Heaviest cells: Large Growth 34.1%, Large Core 20.9%, Large Value 11.9%.

Classified: 75.2% of book weight (233/370 names) · unclassified 24.8%: IJR, IXUS, GLD, IJH, SPY, VEA, IVV, VEU, AZN, MUB +127 more. Size: cap 70/20/10 bands; style: value/growth composite on our own metrics — not Morningstar's model.

Contribution holdings-based, any period

No contribution data for this period.

Holdings· 370 positions (2026-Q1) · largest first · Δ vs 2025-Q4

#	Security	Shares	Value	Weight	Δ QoQ
1	GOOGALPHABET INC	426,203	$122M	5.1%	HOLD
2	MSFTMICROSOFT CORP	238,086	$88M	3.7%	HOLD
3	NVDANVIDIA CORPORATION	473,172	$83M	3.4%	HOLD
4	AAPLAPPLE INC	284,387	$72M	3.0%	HOLD
5	AMZNAMAZON COM INC	339,672	$71M	3.0%	ADD 8%
6	AVGOBROADCOM INC	218,422	$68M	2.8%	TRIM −15%
7	COSTCOSTCO WHSL CORP NEW	67,245	$67M	2.8%	TRIM −2%
8	JPMJPMORGAN CHASE & CO	175,119	$52M	2.2%	HOLD
9	JNJJOHNSON & JOHNSON	210,712	$52M	2.2%	HOLD
10	IJRISHARES TR	370,115	$46M	1.9%	HOLD
11	SYKSTRYKER CORPORATION	139,194	$46M	1.9%	HOLD
12	IXUSISHARES TR	521,388	$45M	1.9%	ADD 4%
13	GLDSPDR GOLD TR	95,827	$41M	1.7%	TRIM −17%
14	IJHISHARES TR	603,874	$41M	1.7%	HOLD
15	SPYSTATE STR SPDR S&P 500 ETF T	62,460	$41M	1.7%	HOLD
16	VVISA INC	122,555	$37M	1.5%	TRIM −8%
17	CBCHUBB LIMITED	102,571	$33M	1.4%	HOLD
18	PANWPALO ALTO NETWORKS INC	192,539	$31M	1.3%	HOLD
19	GOOGLALPHABET INC	103,603	$30M	1.2%	TRIM −5%
20	APHAMPHENOL CORP	206,274	$26M	1.1%	HOLD
21	PEPPEPSICO INC	166,969	$26M	1.1%	TRIM −5%
22	MAMASTERCARD INCORPORATED	50,426	$25M	1.1%	TRIM −4%
23	AXPAMERICAN EXPRESS CO	83,211	$25M	1.1%	HOLD
24	ABTABBOTT LABS	242,629	$25M	1.0%	HOLD
25	RTXRTX CORPORATION	121,195	$23M	1.0%	HOLD
26	XOMEXXON MOBIL CORP	134,642	$23M	1.0%	HOLD
27	HONHONEYWELL INTL INC	99,097	$22M	0.9%	HOLD
28	AZOAUTOZONE INC	6,491	$22M	0.9%	HOLD
29	EQTEQT CORP	344,274	$22M	0.9%	ADD 676%
30	ORCLORACLE CORP	148,772	$22M	0.9%	TRIM −18%
31	VEAVANGUARD TAX-MANAGED FDS	339,275	$22M	0.9%	ADD 2%
32	METAMETA PLATFORMS INC	37,386	$21M	0.9%	TRIM −5%
33	HDHOME DEPOT INC	64,917	$21M	0.9%	HOLD
34	WMWASTE MGMT INC DEL	91,900	$21M	0.9%	HOLD
35	KOCOCA COLA CO	273,612	$21M	0.9%	HOLD
36	TMOTHERMO FISHER SCIENTIFIC INC	41,863	$21M	0.9%	HOLD
37	ITWILLINOIS TOOL WKS INC	77,905	$20M	0.8%	HOLD
38	IVVISHARES TR	30,387	$20M	0.8%	ADD 2%
39	VEUVANGUARD INTL EQUITY INDEX F	261,536	$20M	0.8%	HOLD
40	ACNACCENTURE PLC IRELAND	98,061	$19M	0.8%	HOLD
41	LLYELI LILLY & CO	20,424	$19M	0.8%	TRIM −9%
42	COFCAPITAL ONE FINL CORP	101,885	$19M	0.8%	ADD 30%
43	WFCWELLS FARGO CO NEW	221,240	$18M	0.7%	HOLD
44	CCITIGROUP INC	148,935	$17M	0.7%	HOLD
45	UBERUBER TECHNOLOGIES INC	226,587	$16M	0.7%	TRIM −9%
46	AZNASTRAZENECA PLC	78,802	$16M	0.6%	NEW
47	MUBISHARES TR	139,393	$15M	0.6%	HOLD
48	DISDISNEY WALT CO	148,683	$14M	0.6%	HOLD
49	JMUBJPMORGAN MUNICIPAL ETF	280,702	$14M	0.6%	ADD 11%
50	EFAISHARES TR	135,426	$13M	0.5%	HOLD
51	NEENEXTERA ENERGY INC	138,533	$13M	0.5%	TRIM −4%
52	XLFSELECT SECTOR SPDR TR	253,435	$13M	0.5%	HOLD
53	ICEINTERCONTINENTAL EXCHANGE IN	77,283	$12M	0.5%	HOLD
54	UNPUNION PAC CORP	48,615	$12M	0.5%	HOLD
55	JMSTJ P MORGAN EXCHANGE TRADED F	229,810	$12M	0.5%	ADD 14%
56	ECLECOLAB INC	39,993	$11M	0.4%	HOLD
57	NFLXNETFLIX INC	105,433	$10M	0.4%	HOLD
58	VBVANGUARD INDEX FDS	37,423	$10M	0.4%	TRIM −2%
59	CVXCHEVRON CORP NEW	47,251	$10M	0.4%	ADD 2%
60	FLOTISHARES TR	191,485	$10M	0.4%	ADD 5%
61	WTWWILLIS TOWERS WATSON PLC LTD	32,406	$9M	0.4%	HOLD
62	CHDCHURCH & DWIGHT CO INC	99,270	$9M	0.4%	HOLD
63	VOVANGUARD INDEX FDS	31,971	$9M	0.4%	ADD 3%
64	VTIVANGUARD INDEX FDS	27,975	$9M	0.4%	TRIM −2%
65	MCDMCDONALDS CORP	28,873	$9M	0.4%	HOLD
66	MDYSPDR S&P MIDCAP 400 ETF TR	14,362	$9M	0.4%	HOLD
67	CRMSALESFORCE INC	43,336	$8M	0.3%	ADD 11%
68	CBOECBOE GLOBAL MKTS INC	28,563	$8M	0.3%	TRIM −4%
69	AGGISHARES TR	80,375	$8M	0.3%	HOLD
70	GWWWW GRAINGER INC	6,951	$8M	0.3%	HOLD
71	VTEBVANGUARD MUN BD FDS	151,937	$8M	0.3%	HOLD
72	BXBLACKSTONE INC	64,873	$7M	0.3%	TRIM −28%
73	SUBISHARES TR	69,747	$7M	0.3%	HOLD
74	DHRDANAHER CORP DEL	37,545	$7M	0.3%	ADD 2%
75	CMCANADIAN IMPERIAL BANK OF CO	74,964	$7M	0.3%	TRIM −12%
76	MRKMERCK & CO INC	58,833	$7M	0.3%	TRIM −3%
77	AMGNAMGEN INC	20,088	$7M	0.3%	HOLD
78	UNHUNITEDHEALTH GROUP INC	24,947	$7M	0.3%	TRIM −13%
79	TJXTJX COS INC NEW	41,050	$7M	0.3%	HOLD
80	PGPROCTER AND GAMBLE CO	45,045	$7M	0.3%	HOLD
81	APDAIR PRODS & CHEMS INC	21,225	$6M	0.3%	HOLD
82	ADBEADOBE INC	24,967	$6M	0.3%	TRIM −6%
83	GEVGE VERNOVA INC	6,695	$6M	0.2%	ADD 102%
84	SBUXSTARBUCKS CORP	64,931	$6M	0.2%	HOLD
85	PFEPFIZER INC	203,828	$6M	0.2%	TRIM −2%
86	OKEONEOK INC NEW	62,069	$6M	0.2%	ADD 7%
87	LINLINDE PLC	11,169	$6M	0.2%	HOLD
88	TMUST-MOBILE US INC	26,204	$6M	0.2%	HOLD
89	FBNDFIDELITY TOTAL BOND ETF	116,590	$5M	0.2%	ADD 12%
90	TFCTRUIST FINL CORP	115,276	$5M	0.2%	HOLD
91	VTVVANGUARD INDEX FDS	26,812	$5M	0.2%	TRIM −3%
92	TSCOTRACTOR SUPPLY CO	114,324	$5M	0.2%	HOLD
93	NVSNOVARTIS AG	32,730	$5M	0.2%	HOLD
94	ETNEATON CORP PLC	13,494	$5M	0.2%	HOLD
95	BNDVANGUARD BD INDEX FDS	60,777	$4M	0.2%	TRIM −3%
96	MCKMCKESSON CORP	5,164	$4M	0.2%	ADD 535%
97	JPSTJ P MORGAN EXCHANGE TRADED F	87,200	$4M	0.2%	ADD 5%
98	ABBVABBVIE INC	20,111	$4M	0.2%	TRIM −12%
99	FTVFORTIVE CORP	78,975	$4M	0.2%	HOLD
100	BLKBLACKROCK INC	4,460	$4M	0.2%	HOLD
101	IGSBISHARES TR	78,693	$4M	0.2%	ADD 3%
102	LOWLOWES COS INC	17,492	$4M	0.2%	TRIM −10%
103	IBBISHARES TR	23,808	$4M	0.2%	TRIM −10%
104	SHWSHERWIN WILLIAMS CO	12,524	$4M	0.2%	HOLD
105	PGRPROGRESSIVE CORP	20,126	$4M	0.2%	TRIM −2%
106	ZTSZOETIS INC	33,198	$4M	0.2%	TRIM −11%
107	IBMINTERNATIONAL BUSINESS MACHS	15,864	$4M	0.2%	HOLD
108	WELLWELLTOWER INC	19,335	$4M	0.2%	HOLD
109	JPIEJ P MORGAN EXCHANGE TRADED F	82,549	$4M	0.2%	ADD 3%
110	CDNSCADENCE DESIGN SYSTEM INC	13,678	$4M	0.2%	TRIM −8%
111	EMREMERSON ELEC CO	28,748	$4M	0.2%	TRIM −12%
112	VWOVANGUARD INTL EQUITY INDEX F	69,296	$4M	0.2%	ADD 20%
113	WYWEYERHAEUSER CO	153,095	$4M	0.2%	HOLD
114	IGIBISHARES TR	70,256	$4M	0.2%	HOLD
115	GEGE AEROSPACE	12,971	$4M	0.2%	HOLD
116	SPGIS&P GLOBAL INC	8,419	$4M	0.1%	TRIM −32%
117	ADPAUTOMATIC DATA PROCESSING IN	17,557	$4M	0.1%	HOLD
118	VTIPVANGUARD MALVERN FDS	70,819	$4M	0.1%	HOLD
119	VGKVANGUARD INTL EQUITY INDEX F	41,545	$3M	0.1%	HOLD
120	NTRSNORTHERN TR CORP	24,040	$3M	0.1%	HOLD
121	ICSHISHARES TR	65,357	$3M	0.1%	ADD 59%
122	IEFAISHARES TR	36,273	$3M	0.1%	HOLD
123	VUSBVANGUARD BD INDEX FDS	65,930	$3M	0.1%	TRIM −2%
124	SCHBSCHWAB STRATEGIC TR	130,705	$3M	0.1%	HOLD
125	XLRESELECT SECTOR SPDR TR	78,046	$3M	0.1%	HOLD
126	CWISPDR INDEX SHS FDS	86,520	$3M	0.1%	ADD 35%
127	ALCALCON AG	41,279	$3M	0.1%	TRIM −9%
128	STIPISHARES TR	29,407	$3M	0.1%	ADD 11%
129	HSYHERSHEY CO	13,826	$3M	0.1%	HOLD
130	URIUNITED RENTALS INC	3,830	$3M	0.1%	HOLD
131	FSLRFIRST SOLAR INC	14,136	$3M	0.1%	HOLD
132	IWFISHARES TR	6,404	$3M	0.1%	HOLD
133	IEIISHARES TR	22,732	$3M	0.1%	HOLD
134	IBDRISHARES TR	106,627	$3M	0.1%	TRIM −2%
135	TXNTEXAS INSTRS INC	12,991	$3M	0.1%	TRIM −11%
136	SHYISHARES TR	30,410	$3M	0.1%	TRIM −5%
137	AMATAPPLIED MATLS INC	7,138	$2M	0.1%	HOLD
138	IBDTISHARES TR	96,057	$2M	0.1%	ADD 3%
139	IBDUISHARES TR	102,900	$2M	0.1%	HOLD
140	AMPAMERIPRISE FINL INC	5,344	$2M	0.1%	HOLD
141	HQYHEALTHEQUITY INC	27,800	$2M	0.1%	ADD 5%
142	FISVFISERV INC	41,238	$2M	0.1%	HOLD
143	EWJISHARES INC	27,212	$2M	0.1%	TRIM −3%
144	CITHE CIGNA GROUP	8,604	$2M	0.1%	HOLD
145	AFLAFLAC INC	20,867	$2M	0.1%	HOLD
146	VOOVANGUARD INDEX FDS	3,799	$2M	0.1%	TRIM −6%
147	EWEDWARDS LIFESCIENCES CORP	28,151	$2M	0.1%	HOLD
148	SCHWSCHWAB CHARLES CORP	23,239	$2M	0.1%	HOLD
149	IBDSISHARES TR	89,383	$2M	0.1%	ADD 3%
150	BRK.ABERKSHIRE HATHAWAY INC DEL	3	$2M	0.1%	HOLD
151	IEMGISHARES INC	30,705	$2M	0.1%	HOLD
152	NEMNEWMONT CORP	19,534	$2M	0.1%	TRIM −3%
153	IWRISHARES TR	21,558	$2M	0.1%	HOLD
154	TAT&T INC	71,787	$2M	0.1%	HOLD
155	VRTVERTIV HOLDINGS CO	8,145	$2M	0.1%	TRIM −14%
156	QCOMQUALCOMM INC	15,846	$2M	0.1%	TRIM −8%
157	CSCOCISCO SYS INC	25,975	$2M	0.1%	HOLD
158	SHMSPDR SERIES TRUST	41,922	$2M	0.1%	TRIM −9%
159	KLACKLA CORP	1,351	$2M	0.1%	HOLD
160	SCHGSCHWAB U.S. LARGE-CAP GROWTH ETF	68,218	$2M	0.1%	HOLD
161	BKNGBOOKING HOLDINGS INC	453	$2M	0.1%	HOLD
162	CSLCARLISLE COS INC	5,660	$2M	0.1%	ADD 5%
163	CPCANADIAN PACIFIC KANSAS CITY	23,781	$2M	0.1%	TRIM −15%
164	IBDWISHARES TR	88,500	$2M	0.1%	ADD 11%
165	HUBBHUBBELL INC	3,726	$2M	0.1%	HOLD
166	XYLXYLEM INC	15,156	$2M	0.1%	HOLD
167	PMPHILIP MORRIS INTL INC	10,788	$2M	0.1%	TRIM −4%
168	BRK.BBERKSHIRE HATHAWAY INC DEL	3,644	$2M	0.1%	TRIM −16%
169	MRSHMARSH & MCLENNAN COS INC	10,030	$2M	0.1%	HOLD
170	CTSHCOGNIZANT TECHNOLOGY SOLUTIO	27,891	$2M	0.1%	TRIM −4%
171	METMETLIFE INC	24,190	$2M	0.1%	TRIM −4%
172	DELLDELL TECHNOLOGIES INC	10,238	$2M	0.1%	NEW
173	CATCATERPILLAR INC	2,363	$2M	0.1%	HOLD
174	IWVISHARES TR	4,508	$2M	0.1%	HOLD
175	VZVERIZON COMMUNICATIONS INC	32,406	$2M	0.1%	TRIM −2%
176	EMLCVANECK ETF TRUST	64,700	$2M	0.1%	ADD 14%
177	KEYSKEYSIGHT TECHNOLOGIES INC	5,699	$2M	0.1%	HOLD
178	SYYSYSCO CORP	22,508	$2M	0.1%	HOLD
179	IXCISHARES TR	27,772	$2M	0.1%	ADD 8%
180	GLWCORNING INC	11,564	$2M	0.1%	TRIM −8%
181	FERGFERGUSON ENTERPRISES INC	6,732	$2M	0.1%	HOLD
182	FELEFRANKLIN ELEC INC	16,930	$2M	0.1%	HOLD
183	IYWISHARES TR	8,551	$2M	0.1%	HOLD
184	QQQINVESCO QQQ TR	2,610	$2M	0.1%	TRIM −5%
185	IBDVISHARES TR	68,000	$1M	0.1%	HOLD
186	DUKDUKE ENERGY CORP NEW	11,301	$1M	0.1%	TRIM −4%
187	SLBSCHLUMBERGER LTD	28,413	$1M	0.1%	TRIM −7%
188	LMTLOCKHEED MARTIN CORP	2,376	$1M	0.1%	HOLD
189	VOYAVOYA FINANCIAL INC	20,785	$1M	0.1%	HOLD
190	IBDXISHARES TR	55,000	$1M	0.1%	ADD 6%
191	AONAON PLC	4,073	$1M	0.1%	HOLD
192	PAGPPLAINS GP HLDGS L P	54,100	$1M	0.1%	HOLD
193	EMBISHARES TR	13,862	$1M	0.1%	ADD 12%
194	INTCINTEL CORP	29,345	$1M	0.1%	HOLD
195	CTVACORTEVA INC	15,155	$1M	0.1%	TRIM −12%
196	ALBALBEMARLE CORP	7,012	$1M	0.1%	HOLD
197	IRMIRON MTN INC DEL	12,237	$1M	0.1%	TRIM −4%
198	MDLZMONDELEZ INTL INC	21,184	$1M	0.1%	TRIM −5%
199	FLRNSPDR SERIES TRUST	39,600	$1M	0.1%	TRIM −4%
200	OMCOMNICOM GROUP INC	16,091	$1M	0.1%	ADD 9%

showing the top 200 by weight

Position trends· top 15 holdings · shares held over 6 quarters

green added · red trimmed

Security

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

GOOGALPHABET INC

468K

443K

428K

433K

426K

$122M

MSFTMICROSOFT CORP

238K

235K

232K

226K

241K

238K

$88M

NVDANVIDIA CORPORATION

473K

468K

461K

480K

473K

$83M

AAPLAPPLE INC

302K

300K

282K

287K

284K

$72M

AMZNAMAZON COM INC

254K

255K

308K

305K

315K

340K

$71M

AVGOBROADCOM INC

343K

277K

270K

255K

257K

218K

$68M

COSTCOSTCO WHSL CORP NEW

69K

68K

66K

69K

67K

$67M

JPMJPMORGAN CHASE & CO

171K

170K

167K

176K

175K

$52M

JNJJOHNSON & JOHNSON

207K

205K

203K

198K

213K

211K

$52M

IJRISHARES TR

377K

371K

357K

344K

365K

370K

$46M

SYKSTRYKER CORPORATION

147K

145K

143K

138K

141K

139K

$46M

IXUSISHARES TR

433K

436K

427K

451K

504K

521K

$45M

GLDSPDR GOLD TR

108K

104K

116K

96K

$41M

IJHISHARES TR

683K

687K

620K

600K

608K

604K

$41M

SPYSTATE STR SPDR S&P 500 ETF T

58K

57K

56K

63K

62K

$41M

Shares reported each quarter by the largest current holdings. Green = added vs the prior filing of that name, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

☆Chesley Taft & Associates LLC

Implied return what this book implies · modeled, not advice methodology →

Exposures · what this manager owns, by sector & size (2026-Q1)

By sector

By market cap

By region

By industry group GICS — finer than sector

Top holdings

Sector allocation over time · how the GICS mix & top names shifted quarter by quarter

Style box · size × value-growth placement of the reported book (2026-Q1), classified on current fundamentals (not point-in-time) — load it into PORT to overlay your own portfolio

Contribution holdings-based, any period

Holdings· 370 positions (2026-Q1) · largest first · Δ vs 2025-Q4

Position trends· top 15 holdings · shares held over 6 quarters

Chesley Taft & Associates LLC