X0202 SCHEDULE 13D/A 0000950170-25-043952 0002061007 XXXXXXXX LIVE 2 Common Stock, par value $0.0001 per share 04/28/2026 false 0000894556 369759204 CitroTech Inc.

6400 S. Fiddlers Green Cir., Suite 300 Greenwood Village CO 80111

BoltRock Holdings LLC (212) 735-2691 712 5th Avenue, 22nd Floor New York NY 10019 0002061007 N BoltRock Holdings LLC OO WC N DE 0 4183743 0 4183743 4183743 N 20.0 OO 0001241947 N Craig A. Huff OO N X1 4183743 0 4183743 0 4183743 N 20.0 IN Common Stock, par value $0.0001 per share CitroTech Inc. 6400 S. Fiddlers Green Cir., Suite 300 Greenwood Village CO 80111 This Amendment No. 2 to Schedule 13D amends and supplements the statement on Schedule 13D originally filed with the United States Securities and Exchange Commission ("SEC") on March 24, 2025 (as subsequently amended, the "Schedule 13D"). Capitalized terms used but not defined herein shall have the meanings attributed to them in the Schedule 13D. This Amendment No. 2 is being filed by BoltRock Holdings LLC ("BoltRock") and Craig A. Huff (collectively, the "Reporting Persons") with respect to the common stock, par value $0.0001 per share (the "Common Shares") of CitroTech Inc. (the "Issuer"). The principal business address of the Reporting Persons is 712 5th Avenue, 22nd Floor, New York, NY 10019. The principal business of BoltRock is in the investment of securities. The principal occupation of Mr. Huff is day-to-day management and oversight of BoltRock. During the last five years, none of the Reporting Persons has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). During the last five years, none of the Reporting Persons has been party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. See Row 6 of each of the cover pages. Item 3 of the Schedule 13D is hereby amended and supplemented by adding the following: On April 7, 2026, in connection with the extension of the maturity date of the Convertible Note held by BoltRock, the Issuer issued to BoltRock a warrant to purchase 46,250 Common Shares at an exercise price of $3.00 per share. The warrant has a five-year term commencing on its date of issuance. On April 28, 2026, the Issuer issued to BoltRock 940,799 Common Shares upon the conversion of the Convertible Note for the outstanding principal amount of $2,222,000 plus accrued and unpaid interest, at the conversion rate of $2.4 per share. The information in Item 4 of the Schedule 13D is hereby amended and supplemented by adding the following: The information in Item 3 of this Amendment No. 2 is hereby incorporated by reference into this Item 4. On October 21, 2025, pursuant to the terms of the securities purchase and stockholders agreement with TC Special Investments, LLC, BoltRock appointed Mr. Huff as a member of the Issuer's board of directors. The information in Item 5 of the Schedule 13D is hereby amended and restated as follows: The Reporting Persons have beneficial ownership of 4,183,743 Common Shares, which consists of (i) 3,357,467 Common Shares, (ii) 318,914 Common Shares issuable upon the conversion of 95,674 Series C Shares and (iii) 507,362 Common Shares issuable upon the exercise of certain warrants held by BoltRock. The percentage of beneficial ownership is approximately 20.0% of the outstanding Common Shares. The percentage was calculated based on (i) 19,150,234 Common Shares outstanding as disclosed in the Issuer's Preliminary Information Statement on Schedule 14C filed on April 15, 2026, (ii) 318,914 Common Shares issuable upon the conversion of 95,674 Series C Shares held by BoltRock, (iii) 507,362 Common Shares issuable upon the exercise of certain warrants held by BoltRock and (iv) 940,799 Common Shares issued to BoltRock for the conversion of the Convertible Note on April 28, 2026. The information set forth in rows 7 through 10 of the cover pages to this Amendment No. 2 is incorporated by reference into this Item 5(b). Other than as described in this Amendment No. 2, the Reporting Persons have not effected any transactions in Common Shares during the past 60 days. Not applicable. Not applicable. BoltRock Holdings LLC /s/ Craig A. Huff 04/30/2026 Craig A. Huff /s/ Craig A. Huff 04/30/2026