United States Lime & Minerals Inc (USLM) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Sep 11, 2026.
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Counts cover the 24 most recent Form 4 filings Tradune holds for USLM (filed Mar 5 – Sep 11, 2026); the score below covers only the trailing 90 days (1 buy, 1 sell). No completed check of USLM's Form 4 list on SEC EDGAR is on record yet; the latest USLM filing Tradune holds was filed Sep 11, 2026. This is not guaranteed to be the complete record — see USLM's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 2 filings Tradune holds for USLM filed Sep 11, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
Open-market purchases and sales by insider
Insider
Buys
Sells
Shares bought
Shares sold
Value
Candou Holdings Ltd.10% owner
1
0
20,000
—
+$2,200,000
Antoine M. DoumetDirector
0
1
—
20,000
−$2,200,000
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Insider-activity score
22/ 100
No notable activity
1 distinct buyer1 buy · 1 sell tx
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying.
“Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at USLM
Insiders reported 1 open-market purchase of USLM between Mar 5, 2025 and Sep 11, 2026, across 1 distinct buyer.
The most recent purchase was reported by Candou Holdings Ltd. (10% owner) on Sep 9, 2026.
Grants, option exercises, and tax-withholding transactions are excluded from these counts.
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
How many insiders bought USLM stock in these Form 4 filings?
1 distinct insider at United States Lime & Minerals Inc reported 1 open-market purchase (Form 4 code P) of USLM shares between Mar 5, 2025 and Sep 11, 2026, the most recent filed by Candou Holdings Ltd. (10% owner) on Sep 9, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Who filed the most recent Form 4 for USLM?
The most recent Form 4 on this page was filed by Antoine M. Doumet (Director) on Sep 11, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market USLM insider sale shown?
The largest open-market sale among the filings shown was 26,034 USLM shares at $120.88 (about $3,146,990) by Timothy W. Byrne (President & CEO) on Sep 3, 2025. Value is shares × the price reported on the Form 4; its Rule 10b5-1 box is not checked.
Do the recent USLM insider purchases have the Form 4 10b5-1 box checked?
No. The one USLM open-market purchase shown was reported with the Rule 10b5-1 box not checked. A blank box records what the filer disclosed; it does not prove that no plan exists. Latest: Candou Holdings Ltd. (10% owner) on Sep 9, 2026, 20,000 shares.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.