Matador Resources Co (MTDR) 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 Aug 31, 2026.
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- Filings shown
- 8
- Open-market buys
- 9
- Open-market sells
- 0
- Buys, 10b5-1 box not checked
- 9 of 9
Counts cover the 8 most recent Form 4 filings Tradune holds for MTDR (filed Jun 17 – Aug 31, 2026); the score below covers only the trailing 90 days (8 buys, 0 sells). No completed check of MTDR's Form 4 list on SEC EDGAR is on record yet; the latest MTDR filing Tradune holds was filed Aug 31, 2026. This is not guaranteed to be the complete record — see MTDR'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 7 filings Tradune holds for MTDR filed Aug 12 – Aug 31, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Joseph Wm ForanChairman and CEO | 6 | 0 | 19,794 | — | +$1,026,894 |
| Christopher P. CalvertEVP and CFO | 1 | 0 | 2,500 | — | +$141,600 |
| William Thomas ElsenerEVP, Reservoir Engineering | 1 | 0 | 850 | — | +$43,299 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
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 →
Weekly signal history
MTDR appeared in 2 archived weekly editions as a multi-insider cluster, a top net buyer, or both. These are frozen weekly snapshots, not a complete filing history.
- Week of Oct 7, 2026 3 insiders buying · $1,211,793 net
- Week of Sep 30, 2026 3 insiders buying · $1,211,793 net
An entry means this company met that edition’s displayed cluster or top-buyer threshold. Missing weeks do not mean no insider transaction occurred. All figures are derived from SEC Form 4 filings; open-market buys minus sales are shown as net only when every transaction value was disclosed.
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 MTDR
Insiders reported 9 open-market purchases of MTDR between Jun 17, 2026 and Aug 31, 2026, across 4 distinct buyers. The most recent purchase was reported by Christopher P. Calvert (EVP and CFO) on Aug 27, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 2,500 | $56.64 | 44,000 (indirect) | +6.0% | Aug 27, 2026 |
† 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.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 555 | $54.49 | 4,772 | +13% | Aug 26, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 400 | $53.64 | 31,017 | +1.3% | Aug 17, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 5,000 | $51.44 | 30,617 | +20% | Aug 13, 2026 |
| Open-market purchase 10b5-1 box not checked | 10,000 | $52.16 | 25,617 | +64% | Aug 12, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 709 | $51.68 | 15,617 | +4.8% | Aug 11, 2026 |
| Open-market purchase 10b5-1 box not checked | 3,130 | $51.04 | 14,908 | +27% | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 850 | $50.94 | 114,879 | +0.7% | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 9,400 | — | 84,747 | −10.0% | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 500 | $51.44 | 77,538 | +0.6% | Jun 15, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to MTDR's (Aug 31, 2026).
Frequently asked about MTDR insider activity
How many insiders bought MTDR stock in these Form 4 filings?
4 distinct insiders at Matador Resources Co reported 9 open-market purchases (Form 4 code P) of MTDR shares between Jun 17, 2026 and Aug 31, 2026, the most recent filed by Christopher P. Calvert (EVP and CFO) on Aug 27, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Who filed the most recent Form 4 for MTDR?
The most recent Form 4 on this page was filed by Christopher P. Calvert (EVP and CFO) on Aug 31, 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 MTDR insider purchase shown?
The largest open-market purchase among the filings shown was 10,000 MTDR shares at $52.16 (about $521,600) by Joseph Wm Foran (Chairman and CEO) on Aug 12, 2026. Value is shares × the price reported on the Form 4; its Rule 10b5-1 box is not checked.
Do the recent MTDR insider purchases have the Form 4 10b5-1 box checked?
No. All 9 MTDR open-market purchases shown were 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: Christopher P. Calvert (EVP and CFO) on Aug 27, 2026, 2,500 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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Track MTDR insider filings free →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.