United States Lime & Minerals USLM Insider Ownership

NASDAQ USLM

$106.15 -0.36 (-0.34%)

As of: Oct 21, 2026 · 10:13 AM EDT

Insider Holdings by Owner

18.35Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

62.55%

▲+61.54% pp QoQ

Shares Held by Insiders

17.95Mn

filed for Sep 2026

▲+6,058.18% QoQ

Shares Outstanding

28.69Mn

28,688,363 shares

Direct Holdings

271.22K

Indirect: 17.67Mn

Net Shares Traded (QoQ)

+17.65Mn

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past year, USLM insiders bought $2.2 million of stock (20K shares) and sold $2.35 million (21.28K shares) on the open market.

A count shows one insider buying USLM stock on the open market over the past 12 months and 2 insiders selling.
Among United States Lime & Minerals' insiders, the largest open-market purchases in the past 12 months were by Candou Holdings Ltd. (10% owner), totaling $2.2 million (20K shares), most recently on September 9, 2026.
Meanwhile, the largest open-market sales of USLM in the past 12 months were by Antoine M. Doumet (Director), totaling $2.2 million (20K shares), most recently on September 9, 2026.
Apart from open-market trades, USLM insiders received 49.74K shares in stock awards, acquired 12K shares through option exercises and conversions, gave up 19.66K shares to cover taxes or exercise prices and gave away 180 shares as gifts in the past 12 months.
Business Quant data puts insider holdings in USLM at 17.95Mn shares across insiders' latest Form 4 filings.
United States Lime & Minerals insiders hold 271.22K shares directly (1.51% of their total) and 17.67Mn shares (98.49%) indirectly, through entities such as trusts and partnerships.
Per Business Quant, 12 insiders of USLM hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
United States Lime & Minerals' three biggest insider holders are Candou Holdings Ltd. (10% owner, 17.67Mn shares), Timothy W. Byrne (President & CEO, 114.74K shares) and Antoine M. Doumet (Director, 90K shares), based on their latest Form 4 filings.
The largest insider, Candou Holdings Ltd., holds 98.49% of USLM's insider total.
Institutions accounted for 32.54% of USLM's outstanding shares in Q2 2026, insiders about 62.55% per their latest Form 4 filings, and other investors, including the public, about 4.91%.
A total of 17 Form 4 filings with transactions in United States Lime & Minerals stock were made over the past 12 months, by 12 insiders.
The insider holdings and trades above for United States Lime & Minerals reflect Form 4 filings through September 11, 2026.

Form 4 Holdings

Insiders Holding USLM

Insiders 16

Shares held 18.35Mn

Of outstanding 63.95%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Holdings Ltd. Candou	TenPercentOwner	0	17,673,780	17,673,780	96.3%	11 Sep, 2026
2	Bill Hughes	Senior Vice President	260,380	0	260,380	1.4%	08 May, 2023
3	Timothy W Byrne	President Ceo	114,741	0	114,741	0.6%	02 Jan, 2026
4	Russell W Riggs	Vice President	90,820	0	90,820	0.5%	06 Feb, 2023
5	Antoine M Doumet	Director	90,000	0	90,000	0.5%	11 Sep, 2026
6	Richard W Cardin	Director	36,336	0	36,336	0.2%	04 May, 2026
7	Ray M Harlin	Director	20,000	0	20,000	0.1%	03 May, 2022
8	Tom S Jr Hawkins	Director	11,356	0	11,356	0.1%	05 May, 2026
9	Michael L Wiedemer	Vice President	11,211	0	11,211	0.1%	04 Feb, 2026
10	Nathan O'Neill	Vice President	8,129	0	8,129	0.0%	04 Feb, 2026
11	Timothy Wade Stone	Vice President	7,921	0	7,921	0.0%	04 Feb, 2026
12	John J Gagnon	Vice President	6,151	0	6,151	0.0%	04 Feb, 2026
13	Lila R Weirich	Director	4,176	0	4,176	0.0%	04 May, 2026
14	Jon A Wolkenstein	Director	4,176	0	4,176	0.0%	04 May, 2026
15	Edward A Odishaw	Director	4,000	0	4,000	0.0%	03 May, 2022
16	Sandra C Duhe	Director	3,527	0	3,527	0.0%	04 May, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

778 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
09 Sep, 2026	Holdings Ltd. Candou	TenPercentOwner	Acquired P	20,000	$110.00	$2.20Mn	17,673,780	Indirect
09 Sep, 2026	Antoine M Doumet	Director	Disposed S	20,000	$110.00	$2.20Mn	90,000	Direct
01 May, 2026	Tom S Jr Hawkins	Director	Acquired A	1,273	$110.00	$140.03K	11,356	Direct
01 May, 2026	Sandra C Duhe	Director	Acquired A	1,273	$110.00	$140.03K	3,527	Direct
01 May, 2026	Jon A Wolkenstein	Director	Acquired A	1,273	$110.00	$140.03K	4,176	Direct
01 May, 2026	Richard W Cardin	Director	Acquired A	1,273	$110.00	$140.03K	17,006	Direct
01 May, 2026	Lila R Weirich	Director	Acquired A	1,273	$110.00	$140.03K	4,176	Direct
01 May, 2026	Antoine M Doumet	Director	Acquired M	3,405	$110.00	$374.55K	3,405	Direct
01 May, 2026	Antoine M Doumet	Director	Acquired A	3,405	$110.00	$374.55K	3,405	Direct
17 Mar, 2026	Antoine M Doumet	Director	Acquired M	12,000	$10.71	$128.52K	110,000	Direct
17 Mar, 2026	Antoine M Doumet	Director	Disposed M	12,000	$10.71	$128.52K	0	Direct
03 Mar, 2026	Sandra C Duhe	Director	Disposed S	1,277	$120.45	$153.81K	2,254	Direct
02 Feb, 2026	Michael L Wiedemer	Vice President	Disposed F	95	$123.61	$11.74K	6,525	Direct
02 Feb, 2026	John J Gagnon	Vice President	Disposed F	75	$123.61	$9.27K	6,064	Direct
02 Feb, 2026	Timothy Wade Stone	Vice President	Disposed F	100	$123.61	$12.36K	4,976	Direct
02 Feb, 2026	Nathan O'Neill	Vice President	Disposed F	105	$123.61	$12.98K	7,869	Direct
03 Feb, 2026	John J Gagnon	Vice President	Disposed F	123	$118.13	$14.53K	5,941	Direct
03 Feb, 2026	Michael L Wiedemer	Vice President	Disposed F	165	$118.13	$19.49K	6,360	Direct
03 Feb, 2026	Timothy Wade Stone	Vice President	Disposed F	136	$118.13	$16.07K	4,840	Direct
03 Feb, 2026	Nathan O'Neill	Vice President	Disposed F	166	$118.13	$19.61K	7,703	Direct

Showing 1 to 20 of 778 transactions