EXHIBIT 23.3

CONSENT OF QUALIFIED PERSON

SYB Group, LLC (“SYB”), in connection with the filing of the United States Lime & Minerals, Inc. Annual Report on Form 10-K for the year ended December 31, 2023 (the “Form 10-K”), consented to:

· The filing and use of the Technical Report Summary titled “Technical Report Summary on Texas Lime Company Limestone Operation, Johnson County, Texas, USA”, effective December 31, 2023, with a report date of February 20, 2024, as Exhibit 96.1 to and referenced in the Form 10-K;

· The filing and use of the Technical Report Summary titled “Technical Report Summary on Arkansas Lime Company Limestone Operation, Independence County, Arkansas, USA”, effective December 31, 2023, with a report date of February 20, 2024, as Exhibit 96.2 to and referenced in the Form 10-K;

● The filing and use of the Technical Report Summary titled “Technical Report Summary on ACT Holdings Company Limestone Operation, Izard County, Arkansas, USA”, effective December 31, 2023, with a report date of February 20, 2024, as Exhibit 96.3 to and referenced in the Form 10-K;

● The filing and use of the Technical Report Summary titled “Technical Report Summary on U.S. Lime Company – St. Clair Limestone Operation, Sequoyah County, Oklahoma, USA”, effective December 31, 2023, with a report date of February 20, 2024, as Exhibit 96.4 to and referenced in the Form 10-K;

· The use of and references to our name, including our status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K as promulgated by the Securities and Exchange Commission), in connection with the Form 10-K and any such Technical Report Summary; and

· The information derived, summarized, quoted, or referenced from any of the Technical Report Summaries, or portions thereof, that were prepared by SYB, that SYB supervised the preparation of and/or that was reviewed and approved by SYB, that was included or incorporated by reference in the Form 10-K.

SYB hereby consents to the incorporation by reference of the foregoing in this Registration Statement of United States Lime & Minerals, Inc. on Form S-8. SYB is responsible for authoring, and this consent pertains to, the Technical Report Summaries. SYB certifies that it has read the Form 10-K and that it fairly represents the information in the Technical Report Summaries for which SYB is responsible.

SYB Group, LLC

/s/ Keith Vickers

President

September 16, 2024