[Form 4] United States Lime & Minerals Insider Trading Activity

Rhea-AI Filing Summary

Timothy W. Byrne, President & CEO and Director of United States Lime & Minerals, Inc. (USLM), reported multiple open-market sales of company common stock. The Form 4 shows five transactions on September 3–5, 2025 disposing of 26,034; 1,391; 11,504; 596; and 500 shares respectively, for a total of 39,025 shares sold. Reported weighted-average sale prices range from about $119.17 to $124.37 per share, with the closing-per-share price for the contribution noted as $120.99. Following the last reported sale the filing shows 85,932 shares beneficially owned by the reporting person.

Positive

• None.

Negative

• Insider sales totaling 39,025 shares reported on September 3–5, 2025, representing a reduction in beneficial ownership
• No explanatory context (e.g., notations of a 10b5-1 plan) is provided in the Form 4 to explain the timing or purpose of the dispositions

Insights

Securities Analyst

TL;DR: Insider sold 39,025 USLM shares over three days at weighted-average prices near $120–$124, reducing beneficial holdings to 85,932 shares.

The filing documents multiple open-market sales by the CEO and Director on September 3–5, 2025. The transactions are reported with weighted-average prices and ranges, indicating block trades executed across multiple price points. For investors, the raw data show insider monetization rather than acquisition; no derivative transactions or new grants are reported. The sale sizes and prices are explicit in the filing but the Form 4 does not state intent or any company-specific reason for the dispositions.

Corporate Governance Expert

TL;DR: Multiple disclosed sales by a named executive are routine disclosures; the Form 4 provides precise amounts and price ranges but no explanatory context.

The report meets Section 16 disclosure requirements by listing dates, share counts, and weighted-average prices with explanatory footnotes. It also identifies the reporting person as both President & CEO and Director. There is no indication of Rule 10b5-1 plan checkbox being marked on the face of the form, and the form does not provide narrative context for the sales. From a governance perspective, transparency is adequate but the filing alone does not allow conclusions about motivation or future governance changes.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BYRNE TIMOTHY W

(Last) (First) (Middle)

5429 LBJ FREEWAY

SUITE 230

(Street)

DALLAS TX 75240

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
UNITED STATES LIME & MINERALS INC [ USLM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
USLM Common Stock	09/03/2025		S		26,034	D	$120.88(1)	99,923	D
USLM Common Stock	09/03/2025		S		1,391	D	$124.18(2)	98,532	D
USLM Common Stock	09/04/2025		S		11,504	D	$119.43(3)	87,208	D
USLM Common Stock	09/04/2025		S		596	D	$120.76(4)	86,432	D
USLM Common Stock	09/05/2025		G		500	D	$120.99(5)	85,932	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $120.78 to $121.30, inclusive. The reporting person undertakes to provide United States Lime & Minerals, Inc., any security holder of United States Lime & Minerals, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnotes 1, 2, 3 and 4.

2. The price in Column 4 is a weighted average price. These shares were sold in multiple transaction at prices ranging from $124.00 to $124.37,inclusive.

3. The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $119.17 to $120.00, inclusive.

4. The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $120.75 to $121.54.

5. Closing per share price on the date preceding the date of contribution.

	\s\ Timothy W Byrne	09/05/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What transactions did Timothy W. Byrne report on Form 4 for USLM?

He reported five sales on September 3–5, 2025 disposing of 26,034; 1,391; 11,504; 596; and 500 shares, totaling 39,025 shares sold.

What prices were reported for the USLM insider sales?

Weighted-average prices are reported with ranges: sales ranged roughly from $119.17 to $124.37 per share across the separate transactions.

How many USLM shares does the reporting person own after these transactions?

The Form 4 shows 85,932 shares beneficially owned by the reporting person following the last reported transaction.

Does the Form 4 show any derivative transactions or option exercises for USLM?

No. Table II (derivative securities) contains no reported acquisitions, dispositions, or holdings in this filing.

Is the reporting person identified and what is his role at USLM?

The reporting person is Timothy W. Byrne, identified as both President & CEO and a Director of United States Lime & Minerals, Inc.