Chesley Taft & Associates LLC

Registered adviser

CIK

1164632

Location

CHICAGO, IL

Portfolio Value

Mid $2,254,222,220

Diversification

Diversified

Filing Date

Global Rank

#1,422 / 8,807 ▼ 114 · as of Jun 2026

Top Industry

Semiconductors 10.3%

Period ended 20 days ago

Filed Oct 13, 2026 · 7d

27 quarters · since Mar 2020

Regulatory profile

From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.

Holder type

Registered adviser

Form ADV roster, Oct 1, 2026

Form ADV adviser

CRD 111578

Roster of Oct 1, 2026

Regulatory AUM

$3,013,514,015

Main clients

Individuals and high net worth (97% of AUM)

Form ADV history

Monthly rosters from Dec 2019; each row is a run with the same figures, newest first.

Rosters	Regulatory AUM	Main clients
Apr 2026 to Oct 2026	$3,013,514,015	Individuals and high net worth (97%)
Apr 2025 to Mar 2026	$2,794,834,551	Individuals and high net worth (95%)
Apr 2024 to Mar 2025	$2,403,798,693	Individuals and high net worth (96%)
May 2023 to Mar 2024	$2,059,313,545	Individuals and high net worth (95%)
Apr 2023	$2,059,313,545	Individuals and high net worth (95%)
Apr 2022 to Mar 2023	$2,492,792,392	Individuals and high net worth (95%)

3 earlier changes not shown.

Portfolio style

Measured from the filed 13F common-share book for Jun 30, 2026, the newest measured quarter, never from the firm's own description.

Style

Diversified active

Top 10 weight 36.9%, 46.7 effective positions, active share 49.4% against the S&P 500 as of 2026-06-30; it meets none of the index-like, systematic-like or concentrated tests

Turnover

Low turnover

9.2% over the last four quarters (under 30%)

Horizon

Long horizon

Value-weighted holding period 23.3 quarters (12+), a floor since 80.8% of the book was already held when coverage starts

Closest benchmark: the S&P 500 as of 2026-06-30, active share 49.4%; sector active share 13.1% against the combined 13F book's sector weights.

Over time 26 measured quarters

How the bands are measured

Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.

Clone Performance

Build a hypothetical price-return history from this filer's public 13F holdings.

View clone backtest

Portfolio Concentration

365 tracked positions · as of Sep 30, 2026 · Δ vs Jun 30, 2026

Top Position

7.7%

−0.3 pts

Top 5

25.1%

+2.5 pts

Top 10

38.7%

+1.8 pts

HHI

227

Diversified+13

Portfolio Trend

27 quarters · across all stocks

Sector Breakdown

As of Sep 30, 2026

Sector	% Portfolio	Value	Positions
Technology	27.0%	$608,136,606	48
Financial Services	14.7%	$331,590,221	43
Unclassified	13.0%	$293,283,788	112
Healthcare	11.4%	$255,951,122	28
Communication Services	10.1%	$228,794,898	12
Industrials	7.4%	$165,859,107	42
Consumer Cyclical	6.4%	$143,302,200	21
Consumer Defensive	5.7%	$127,993,239	17
Energy	1.7%	$38,143,662	13
Basic Materials	1.4%	$31,987,230	10
Utilities	0.8%	$17,919,357	12
Real Estate	0.5%	$11,260,790	7

Last Quarter's Activity

Export CSV

Sep 30, 2026 vs Jun 30, 2026

Added To

Positions the filer increased

25 positions

Ticker	Company	Δ Shares	Shares	Value
APH	Amphenol Corp /De/	+191,288	393,350	$33,159,405
OEF	iShares S&P 100 ETF	+138,250	139,121	$0
JPIE	JPMorgan Income ETF	+23,390	111,280	$4,995,358
JMUB	JPMorgan Municipal ETF	+19,096	331,298	$15,763,158
IBDW	iShares iBonds Dec 2031 Term Corporate ETF	+19,000	116,400	$0
CWI	Spdr Index Shares Funds	+17,095	114,592	$4,630,661
JMST	JPMorgan Ultra-Short Municipal Income ETF	+15,780	301,115	$15,224,374
CVX	Chevron Corp	+14,026	60,655	$12,386,357
IXUS	iShares Core MSCI Total International Stock ETF	+10,505	550,684	$0
AZN	Astrazeneca PLC	+10,085	91,361	$14,752,060
VLO	Valero Energy Corp/Tx	+8,418	10,154	$3,935,791
IBDT	iShares iBonds Dec 2028 Term Corporate ETF	+8,225	109,882	$0
FLOT	iShares Floating Rate Bond ETF	+7,985	210,870	$0
VMBS	VANGUARD MORTGAGE-BACKED SECURITIES INDEX FUND	+6,800	23,631	$1,049,452
SCHZ	Schwab U.S. Aggregate Bond ETF	+6,109	17,719	$391,589
VEA	Vanguard FTSE Developed Markets ETF	+6,071	361,112	$25,498,117
IBDV	iShares iBonds Dec 2030 Term Corporate ETF	+6,000	75,000	$0
GLD	Spdr Gold Trust	+5,683	99,356	$37,838,739
ESGV	VANGUARD ESG U.S. STOCK ETF	+5,500	7,403	$1,003,328
VO	VANGUARD MID-CAP INDEX FUND	+4,962	138,411	$10,854,189
IBDS	iShares iBonds Dec 2027 Term Corporate ETF	+4,634	95,746	$0
VUSB	VANGUARD ULTRA-SHORT BOND ETF	+4,632	73,465	$3,640,190
FBND	Fidelity Total Bond ETF	+4,600	124,815	$5,404,489
VTIP	VANGUARD SHORT-TERM INFLATION-PROTECTED SECURITIES INDEX FUND	+4,550	84,169	$4,142,798
TOST	Toast, Inc.	+4,364	61,964	$1,796,335
No positions match the current search.

Trimmed

Positions the filer reduced

25 positions

Ticker	Company	Δ Shares	Shares	Value
UBER	Uber Technologies, Inc	−161,036	110,641	$7,580,014
EQT	EQT Corp	−42,617	300,828	$14,608,207
NFLX	Netflix Inc	−34,830	69,665	$4,847,290
HD	Home Depot, Inc.	−33,087	27,748	$7,894,028
PANW	Palo Alto Networks Inc	−24,951	157,154	$62,438,855
IBDR	iShares iBonds Dec 2026 Term Corporate ETF	−23,448	57,182	$0
ICSH	iShares Ultra Short Duration Bond Active ETF	−18,774	34,600	$1,743,839
ADBE	Adobe Inc.	−11,787	906	$217,385
SYY	Sysco Corp	−10,065	12,463	$971,614
VTEB	VANGUARD TAX-EXEMPT BOND INDEX FUND	−9,361	143,189	$6,781,431
GOOG	Alphabet Inc.	−9,325	409,124	$139,404,911
WFC	Wells Fargo & Company/Mn	−5,787	213,495	$17,090,273
CRM	Salesforce, Inc.	−5,638	79,545	$18,261,144
AAPL	Apple Inc.	−5,390	278,953	$92,896,927
IJR	iShares Core S&P Small-Cap ETF	−4,934	366,778	$0
PEP	Pepsico Inc	−4,188	157,864	$20,004,525
MUB	iShares National Muni Bond ETF	−4,142	134,801	$0
SPGI	S&P Global Inc.	−4,125	3,051	$1,203,527
KLAC	Kla Corp	−3,529	6,036	$1,176,597
VEU	Vanguard International Equity Index Funds	−3,526	259,794	$21,555,107
KO	Coca Cola Co	−3,495	264,146	$22,737,687
MSFT	Microsoft Corp	−3,425	213,746	$109,630,322
VXUS	Vanguard Total International Stock ETF	−3,389	8,424	$715,702
AMZN	Amazon Com Inc	−3,255	336,775	$83,907,490
DIS	Walt Disney Co	−2,960	141,913	$14,886,673
No positions match the current search.

New Positions

Positions the filer opened this quarter

13 positions

Ticker	Company	Shares	Value
HONA	Honeywell Aerospace Inc.	93,068	$14,422,746
HON	Honeywell International Inc	52,529	$11,080,466
SPCX	Space Exploration Technologies Corp	4,716	$711,455
VSGX	VANGUARD ESG INTERNATIONAL STOCK ETF	5,751	$466,233
GPN	Global Payments Inc	5,165	$421,825
TTWO	Take Two Interactive Software Inc	1,139	$236,342
NOW	ServiceNow, Inc.	1,749	$234,383
IBIT	iShares Bitcoin Trust ETF	4,850	$229,599
EL	Estee Lauder Companies Inc	2,471	$229,234
VCEB	VANGUARD ESG U.S. CORPORATE BOND ETF	3,700	$220,446
NUBD	Nuveen ESG U.S. Aggregate Bond ETF	10,200	$215,934
GOVT	iShares U.S. Treasury Bond ETF	11,982	$0
IBTI	iShares iBonds Dec 2028 Term Treasury ETF	19,400	$0
No positions match the current search.

Sold Out

Positions the filer fully exited

17 positions

Ticker	Company	Shares	Value
XOM	ExxonMobil Holdings Corp	129,699	$17,732,446
OKE	Oneok Inc /New/	62,253	$5,412,275
—		41,922	$2,010,998
FISV	Fiserv Inc	38,641	$1,895,341
GFS	GLOBALFOUNDRIES Inc.	3,590	$295,851
XEL	Xcel Energy Inc	3,403	$273,260
HYD	VanEck High Yield Muni ETF	4,800	$247,248
XTEN	BondBloxx Bloomberg Ten Year Target Duration US Treasury ETF	4,827	$220,014
RWR	State Street(R) SPDR(R) Dow Jones(R) REIT ETF	1,900	$214,643
KMB	Kimberly Clark Corp	1,936	$212,514
BAC	Bank Of America Corp /De/	3,682	$209,800
DHI	Horton D R Inc /De/	1,268	$206,531
CVS	CVS HEALTH Corp	1,989	$205,762
BRBR	Bellring Brands, Inc.	11,863	$153,507
IBTG	iShares iBonds Dec 2026 Term Treasury ETF	18,600	$0
IBDU	iShares iBonds Dec 2029 Term Corporate ETF	113,900	$0
IBDY	iShares iBonds Dec 2033 Term Corporate ETF	9,000	$0
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

365 tracked positions · $2,254,222,220 total · filing declares 629 positions · $2,558,837,177 · as of Sep 30, 2026

All sectors Basic Materials Communication Services Consumer Cyclical Consumer Defensive Energy Financial Services Healthcare Industrials Real Estate Technology Utilities

Showing 1–50 of 365 positions by value · page 1 of 8

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
GOOG	Alphabet Inc. Communication Services	Reduced	409,124	-9,325	$139,404,911	−5.7%	6.18%
MSFT	Microsoft Corp Technology	Reduced	213,746	-3,425	$109,630,322	+35.3%	4.86%
NVDA	Nvidia Corp Technology	Reduced	463,267	-1,422	$105,800,916	+13.8%	4.69%
AAPL	Apple Inc. Technology	Reduced	278,953	-5,390	$92,896,927	+12.9%	4.12%
AMZN	Amazon Com Inc Consumer Cyclical	Reduced	336,775	-3,255	$83,907,490	+3.5%	3.72%
AVGO	Broadcom Inc. Technology	Reduced	211,031	-1,928	$74,111,976	−7.9%	3.29%
PANW	Palo Alto Networks Inc Technology	Reduced	157,154	-24,951	$62,438,855	+0.5%	2.77%
COST	Costco Wholesale Corp /New Consumer Defensive	Reduced	64,951	-1,081	$59,127,492	−4.3%	2.62%
JPM	Jpmorgan Chase & Co Financial Services	Reduced	168,747	-2,322	$55,826,569	−0.3%	2.48%
JNJ	Johnson & Johnson Healthcare	Reduced	208,339	-1,396	$55,155,666	+3.5%	2.45%
SPY	Spdr S&P 500 ETF Trust	Reduced	60,649	-817	$46,252,746	+0.8%	2.05%
V	Visa Inc. Financial Services	Reduced	121,436	-1,106	$43,635,597	+3.8%	1.94%
SYK	Stryker Corp Healthcare	Reduced	137,980	-769	$37,998,312	−13.0%	1.69%
GLD	Spdr Gold Trust	Added	99,356	+5,683	$37,838,739	+9.7%	1.68%
GOOGL	Alphabet Inc. Communication Services	Reduced	98,667	-2,158	$33,949,340	−5.8%	1.51%
CB	Chubb Ltd Financial Services	Added	104,214	+539	$33,895,602	−4.0%	1.50%
APH	Amphenol Corp /De/ Technology	Added	393,350	+191,288	$33,159,405	−53.5%	1.47%
TMO	Thermo Fisher Scientific Inc. Healthcare	Reduced	42,278	-55	$28,539,763	+34.5%	1.27%
MA	Mastercard Inc Financial Services	Added	50,818	+300	$28,024,602	+8.0%	1.24%
ABT	Abbott Laboratories Healthcare	Added	282,519	+2,835	$27,921,352	+10.0%	1.24%
META	Meta Platforms, Inc. Communication Services	Reduced	36,394	-868	$26,392,200	+25.7%	1.17%
VEA	Vanguard FTSE Developed Markets ETF	Added	361,112	+6,071	$25,498,117	+0.8%	1.13%
AXP	American Express Co Financial Services	Reduced	81,243	-695	$24,705,996	−10.9%	1.10%
LLY	ELI LILLY & Co Healthcare	Reduced	20,302	-45	$23,491,037	−3.7%	1.04%
RTX	RTX Corp Industrials	Added	125,803	+1,351	$23,355,326	−1.1%	1.04%
KO	Coca Cola Co Consumer Defensive	Reduced	264,146	-3,495	$22,737,687	+4.5%	1.01%
VEU	Vanguard International Equity Index Funds	Reduced	259,794	-3,526	$21,555,107	−2.3%	0.96%
COF	Capital One Financial Corp Financial Services	Added	110,914	+2,188	$21,414,165	−1.8%	0.95%
ORCL	Oracle Corp Technology	Reduced	146,265	-939	$20,082,184	−6.9%	0.89%
PEP	Pepsico Inc Consumer Defensive	Reduced	157,864	-4,188	$20,004,525	−8.8%	0.89%
C	Citigroup Inc Financial Services	Added	153,002	+947	$19,810,698	−6.9%	0.88%
WM	Waste Management Inc Industrials	Added	94,353	+1,871	$19,240,462	−6.7%	0.85%
ITW	Illinois Tool Works Inc Industrials	Reduced	73,883	-529	$19,008,617	−5.6%	0.84%
AZO	Autozone Inc Consumer Cyclical	Added	6,599	+30	$18,675,301	−11.0%	0.83%
CRM	Salesforce, Inc. Technology	Reduced	79,545	-5,638	$18,261,144	+36.8%	0.81%
WFC	Wells Fargo & Company/Mn Financial Services	Reduced	213,495	-5,787	$17,090,273	−5.7%	0.76%
ACN	Accenture plc Technology	Reduced	89,447	-824	$16,401,895	+46.0%	0.73%
JMUB	JPMorgan Municipal ETF	Added	331,298	+19,096	$15,763,158	−0.3%	0.70%
JMST	JPMorgan Ultra-Short Municipal Income ETF	Added	301,115	+15,780	$15,224,374	+4.6%	0.68%
DIS	Walt Disney Co Communication Services	Reduced	141,913	-2,960	$14,886,673	+6.8%	0.66%
AZN	Astrazeneca PLC Healthcare	Added	91,361	+10,085	$14,752,060	−4.3%	0.65%
EQT	EQT Corp Energy	Reduced	300,828	-42,617	$14,608,207	−20.0%	0.65%
UNP	Union Pacific Corp Industrials	Added	53,202	+3,909	$14,477,859	+8.0%	0.64%
HONA	Honeywell Aerospace Inc. Industrials	NEW	93,068	NEW	$14,422,746	NEW	0.64%
CVX	Chevron Corp Energy	Added	60,655	+14,026	$12,386,357	+60.3%	0.55%
VB	Vanguard Index Funds	Added	40,619	+715	$11,555,699	−4.5%	0.51%
ICE	Intercontinental Exchange, Inc. Financial Services	Reduced	75,794	-1,038	$11,522,960	+21.8%	0.51%
ECL	Ecolab Inc. Basic Materials	Added	40,811	+398	$11,205,883	−0.5%	0.50%
HON	Honeywell International Inc Industrials	NEW	52,529	NEW	$11,080,466	NEW	0.49%
NEE	Nextera Energy Inc Utilities	Added	145,263	+1,006	$11,002,218	−13.1%	0.49%

Showing the top 50 of 365 positions. Create a free account to see every position, past quarters, search, filters and CSV export.

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.