Chesley Taft & Associates LLC has filed a Form 13F-HR with the Securities and Exchange Commission, disclosing its equity holdings as of the close of business on September 30, 2026. The filing, signed by Manager N Faris F. Chesley on October 13, 2026, details the firm's investment portfolio for that reporting period.

The report lists a total of 629 holdings. The filing includes detailed information for each position, including the name of the issuer, CUSIP number, Bloomberg Global Identifier (BBGID), total number of shares, and the total value of the holdings.

The portfolio includes a diverse range of publicly traded companies across various sectors. Major holdings include Alphabet Inc. Class A and Class C shares, Amazon.com Inc., Apple Inc., and Microsoft Corporation. The filing also lists significant positions in financial services, such as American Express Co., JPMorgan Chase & Co., and Visa Inc. Additionally, the portfolio includes energy companies like Exxon Mobil Corporation, Chevron Corporation, and ConocoPhillips, as well as technology firms such as Cisco Systems Inc. and Broadcom Inc.

For each security listed, the filing provides the total number of shares held and the total value of those shares. This information allows investors to see the aggregate value of Chesley Taft & Associates LLC's equity portfolio as of the specified date.