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Who

Corbin J. Robertson Jr.

Director

Company insider

Files Form 4 as: Director, KLX Energy Services Holdings; Chairman and CEO, Natural Resource Partners LP Limited Partnership; Director and Officer and 10% owner, Quintana Energy Services; Director and 10% owner, Quintana Maritime.

Every Form 4 they filed

In numbers

Trades disclosed
277
Buys
13
Sells
24
Bought
$6.6M
Sold
$4.5M
Companies
4
Companies where not an officer
2
First trade
17 Oct 2002
Last trade
16 Sep 2026
Last filed
17 Sep 2026

Companies traded

Where they are an officer
NRP Natural Resource Partners LP Limited PartnershipDirector, Officer, 10% owner · Coal · last 10 Feb 20264 buys · 0 sells
Quintana Energy ServicesDirector, Officer, 10% owner · last 14 Feb 20209 buys · 0 sells
Everywhere else they filed: board seats, 10% stakes, other companies
KLXE KLX Energy Services HoldingsDirector · Oilfield services · last 16 Sep 20260 buys · 24 sells
Quintana MaritimeDirector, 10% owner · last 26 Dec 20070 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
101Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
16 Sep 2026filed 17 Sep 2026KLXE KLX Energy Services HoldingsOilfield servicesSEC FORM 4 Code M$58K38,694 at $1.49filing
16 Sep 2026filed 17 Sep 2026KLXE KLX Energy Services Holdingsoption or derivative · Oilfield servicesSEC FORM 4 Code M—9,960 at $0.00filing
16 Sep 2026filed 17 Sep 2026KLXE KLX Energy Services Holdingsoption or derivative · Oilfield servicesSEC FORM 4 Code M—9,960 at $0.00filing
16 Sep 2026filed 17 Sep 2026KLXE KLX Energy Services HoldingsOilfield servicesSEC FORM 4 Code M$58K38,694 at $1.49filing
14 Sep 2026filed 15 Sep 2026KLXE KLX Energy Services HoldingsOilfield servicesSEC FORM 4 Code M$336K225,353 at $1.49filing
14 Sep 2026filed 15 Sep 2026KLXE KLX Energy Services Holdingsoption or derivative · Oilfield servicesSEC FORM 4 Code M—58,006 at $0.00filing
14 Sep 2026filed 15 Sep 2026KLXE KLX Energy Services Holdingsoption or derivative · Oilfield servicesSEC FORM 4 Code M—58,006 at $0.00filing
14 Sep 2026filed 15 Sep 2026KLXE KLX Energy Services HoldingsOilfield servicesSEC FORM 4 Code M$336K225,353 at $1.49filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited PartnershipCoalSEC FORM 4 Code M—72,849filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited PartnershipCoalSEC FORM 4 Code F$3.5M28,666 at $123.04filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited Partnershipoption or derivative · CoalSEC FORM 4 Code M—40,368filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited Partnershipoption or derivative · CoalSEC FORM 4 Code M—40,368filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited Partnershipoption or derivative · CoalSEC FORM 4 Code M—27,220filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited Partnershipoption or derivative · CoalSEC FORM 4 Code M—2,756filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited Partnershipoption or derivative · CoalSEC FORM 4 Code M—2,505filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited Partnershipoption or derivative · CoalSEC FORM 4 Code M—27,220filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited Partnershipoption or derivative · CoalSEC FORM 4 Code M—2,756filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited Partnershipoption or derivative · CoalSEC FORM 4 Code M—2,505filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited PartnershipCoalSEC FORM 4 Code M—72,849filing
10 Feb 2026filed 12 Feb 2026NRP Natural Resource Partners LP Limited PartnershipCoalSEC FORM 4 Code F$3.5M28,666 at $123.04filing

Sectors

Energy28
Not placed9

Buys in green, sells in red, by the company’s sector.

Related people

Gregory F. WootenExecutive Vice President · Executive Vice President at Natural Resource Partners LP, filing Form 4 there in the last year
Kevin J. CraigExecutive Vice President · Executive Vice President at Natural Resource Partners LP, filing Form 4 there in the last year
Richard A. NavarreDirector · Director at Natural Resource Partners LP, filing Form 4 there in the last year
Corbin J. Robertson IIIDirector · Director at Natural Resource Partners LP, filing Form 4 there in the last year
Stephen P. SmithDirector · Director at Natural Resource Partners LP, filing Form 4 there in the last year