Corundum Trust Company, INC has filed a Form 13F-HR disclosing its equity securities holdings as of the close of business on September 30, 2026. The filing was submitted by Kolton Michalski, the Trust Officer for the firm, located in Sioux Falls, South Dakota.

The report details a portfolio consisting of 28 individual securities. The largest holding in the portfolio is 3M Company, for which the firm holds 3,928,080 shares. Other notable positions include Alphabet Inc. Class C Capital Stock with 5,296 shares, Amazon.com Inc. Class A Common Stock with 1,703 shares, and Apple Inc. with 6,491 shares.

The portfolio is heavily weighted toward exchange-traded funds (ETFs), with the iShares Core S&P Small Cap ETF holding the largest number of shares at 31,198. Other significant ETF positions include the iShares Core S&P 500 ETF (33,066 shares) and the iShares MSCI EAFE ETF (12,639 shares). The filing also lists substantial positions in Solventum Corporation (9,831 shares) and UGI Corporation (9,773 shares).

The total number of securities reported is 28, with the aggregate value of the holdings listed as $37,761,126.