X0202 SCHEDULE 13D/A 0001104659-21-150372 0001480561 XXXXXXXX LIVE 20 Common Stock, $0.001 par value per share 04/16/2026 false 0001850787 000000000 KAYNE DL 2021, INC.

717 Texas Avenue, Suite 2200 Houston TX 77002

Garon Meikle, Chief Financial (313) 324-5900 UAW Retiree Medical Benefits Trust 1155 Brewery Park Blvd., Suite 400 Detroit MI 48207 0001480561 N UAW Retiree Medical Benefits Trust a WC N XX 0.00 67001.91 0.00 67001.91 67001.91 N 99.1 EP 0001795057 N UAW Chrysler Retirees Medical Benefits Plan a WC N XX 0.00 13065.37 0.00 13065.37 13065.37 N 19.3 EP 0001795052 N UAW Ford Retirees Medical Benefits Plan a WC N XX 0.00 20368.58 0.00 20368.58 20368.58 N 30.1 EP 0001795050 N UAW GM Retirees Medical Benefits Plan a WC N XX 0.00 33567.96 0.00 33567.96 33567.96 N 49.6 EP 0001794997 N Hershel Harper a AF N X1 0.00 67001.91 0.00 67001.91 67001.91 N 99.1 IN Common Stock, $0.001 par value per share KAYNE DL 2021, INC. 717 Texas Avenue, Suite 2200 Houston TX 77002 This Item 4 is hereby amended to include the following: On October 16, 2025, pursuant to distribution reinvestment plans (i) UAW Chrysler Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW Chrysler Retirees Medical Benefits Plan 46.06 Shares; (ii) UAW Ford Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW Ford Retirees Medical Benefits Plan 71.81 Shares; and (iii) UAW GM Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW GM Retirees Medical Benefits Plan 118.34 Shares. The price per Share was $5,246.00. On January 16, 2026, pursuant to distribution reinvestment plans (i) UAW Chrysler Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW Chrysler Retirees Medical Benefits Plan 47.48 Shares; (ii) UAW Ford Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW Ford Retirees Medical Benefits Plan 74.02 Shares; and (iii) UAW GM Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW GM Retirees Medical Benefits Plan 121.99 Shares. The price per Share was $5,230.00. The effective purchase date of these Shares is January 16, 2026, however, the number of Shares purchased was not known until the net asset value of the Issuer was finalized on January 22, 2026. On April 16, 2026, pursuant to distribution reinvestment plans (i) UAW Chrysler Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW Chrysler Retirees Medical Benefits Plan 43.00 Shares; (ii) UAW Ford Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW Ford Retirees Medical Benefits Plan 67.03 Shares; and (iii) UAW GM Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW GM Retirees Medical Benefits Plan 110.47 Shares. The price per Share was $5,208.00. The effective purchase date of these Shares is April 16, 2026, however, the number of Shares purchased was not known until the net asset value of the Issuer was finalized on April 22, 2026. On July 16, 2026, pursuant to distribution reinvestment plans (i) UAW Chrysler Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW Chrysler Retirees Medical Benefits Plan 41.45 Shares; (ii) UAW Ford Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW Ford Retirees Medical Benefits Plan 64.61 Shares; and (iii) UAW GM Retirees Medical Benefits Plan reinvested distribution proceeds in the Issuer and the Issuer issued to UAW GM Retirees Medical Benefits Plan 106.48 Shares. The price per Share was $5,185.00. The effective purchase date of these Shares is July 16, 2026, however, the number of Shares purchased was not known until the net asset value of the Issuer was finalized on July 21, 2026. The aggregate number of Shares to which this Amendment No. 20 relates is 67,001.91. Such aggregate number of Shares represents 99.1% of the common stock of the Issuer. The percentage reported in this Amendment No. 20 is calculated based upon 67,613.62 Shares outstanding as of July 16, 2026 as indicated by the Issuer. The UAW Chrysler Retirees Medical Benefits Plan beneficially owns and has shared voting and dispositive power of 13,065.37 Shares. Such Shares represent 19.3% of the Shares outstanding. The UAW Ford Retirees Medical Benefits Plan beneficially owns and has shared voting and dispositive power of 20,368.58 Shares. Such Shares represent 30.1% of the Shares outstanding. The UAW GM Retirees Medical Benefits Plan beneficially owns and has shared voting and dispositive power of 33,567.96 Shares. Such Shares represent 49.6% of the Shares outstanding. UAW RMBT is the trust under which the Plans are established and, pursuant to Rule 13d-3, may be deemed to beneficially own the 67,001.91 Shares held by the Plans. Such Shares represent 99.1% of the Shares outstanding. UAW RMBT is an indirect beneficial owner of these Shares. Hershel Harper is the chief investment officer of UAW RMBT, the trust under which the Plans are established, and, pursuant to Rule 13d-3 may be deemed to beneficially own the 67,001.91 Shares held by the Plans. Such Shares represent 99.1% of the Shares outstanding. Hershel Harper is an indirect beneficial owner of these Shares. Except as disclosed in Item 4, no transactions in the Shares were effected during the past sixty days by the Reporting Persons. Not applicable. Not applicable. UAW Retiree Medical Benefits Trust /s/ Garon Meikle 07/23/2026 UAW Chrysler Retirees Medical Benefits Plan /s/ Garon Meikle 07/23/2026 UAW Ford Retirees Medical Benefits Plan /s/ Garon Meikle 07/23/2026 UAW GM Retirees Medical Benefits Plan /s/ Garon Meikle 07/23/2026 Hershel Harper /s/ Hershel Harper 07/23/2026