ROBERTSON CORBIN J JR

Director at NATURAL RESOURCE PARTNERS LP · on record since Feb 28, 2006
10% owner at NATURAL RESOURCE PARTNERS LP · on record since Feb 28, 2006
Director at Bird Acquisition Corp. · on record since May 15, 2006
10% owner at Bird Acquisition Corp. · on record since May 15, 2006
Chairman and CEO at NATURAL RESOURCE PARTNERS LP · on record since Nov 18, 2003
Director at Quintana Energy Services Inc. · on record since Feb 15, 2018
10% owner at Quintana Energy Services Inc. · on record since Feb 8, 2018
See Remarks at Quintana Energy Services Inc. · on record since Apr 1, 2019
Director at KLX Energy Services Holdings, Inc. · on record since Jul 30, 2020
Chairman at Bird Acquisition Corp. · on record since Jul 14, 2005

Insider trading activity of ROBERTSON CORBIN J JR

Transactions on record: 303; since Aug 19, 2003

Open-market buys: 35; $6.8M

Open-market sells: 61; $19.5M

Companies traded: 4; last filing Sep 17, 2026

Figures computed from official regulatory filings — .

Companies where ROBERTSON CORBIN J JR has traded

KLX Energy Services Holdings, Inc.70 tx · $4.9M · Sep 17, 2026
NATURAL RESOURCE PARTNERS LP182 tx · $70.1M · Feb 12, 2026
Quintana Energy Services Inc.31 tx · $2.1M · Mar 20, 2020
Bird Acquisition Corp.20 tx · $5.1M · Dec 27, 2007

Track record of ROBERTSON CORBIN J JR

Statistical track record

Free account

Open-market buys: 37

Last buy: Sep 13, 2019

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Transaction history of ROBERTSON CORBIN J JR

Co-insiders of ROBERTSON CORBIN J JR

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
KLX Energy Services Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	38,694	1.49 USD	$57.7K	SEC
KLX Energy Services Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-9,960	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KLX Energy Services Holdings, Inc.Listing on record	Sep 15, 2026	ExerciseD (derivative)	-58,006	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KLX Energy Services Holdings, Inc.Listing on record	Sep 15, 2026	Exercise	225,353	1.49 USD	$335.8K	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	ExerciseD (derivative)	40,368	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	ExerciseD (derivative)	2,756	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	ExerciseD (derivative)	27,220	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	ExerciseD (derivative)	2,505	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	Other	-28,666	123.04 USD	$3.5M	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	Exercise	72,849	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 6, 2026	AwardD (derivative)	7,938	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KLX Energy Services Holdings, Inc.Listing on record	Feb 2, 2026	Award	14,481	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Jan 5, 2026	Other	-794	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	Exercise	58,050	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	Other	-22,843	102.72 USD	$2.3M	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	ExerciseD (derivative)	2,755	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	ExerciseD (derivative)	28,076	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	ExerciseD (derivative)	27,219	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 6, 2025	AwardD (derivative)	7,515	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KLX Energy Services Holdings, Inc.Listing on record	Feb 4, 2025	Award	5,658	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	Exercise	73,529	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	ExerciseD (derivative)	18,235	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	Other	-28,934	86.91 USD	$2.5M	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	ExerciseD (derivative)	28,076	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	ExerciseD (derivative)	27,218	—	n/a (No price was disclosed in the filing)	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
KLX Energy Services Holdings, Inc.Listing on record	Sep 17, 2026	Exercise	38,694	1.49 USD	$57.7K	SEC
KLX Energy Services Holdings, Inc.Listing on record	Sep 17, 2026	ExerciseD (derivative)	-9,960	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KLX Energy Services Holdings, Inc.Listing on record	Sep 15, 2026	ExerciseD (derivative)	-58,006	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KLX Energy Services Holdings, Inc.Listing on record	Sep 15, 2026	Exercise	225,353	1.49 USD	$335.8K	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	ExerciseD (derivative)	40,368	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	ExerciseD (derivative)	2,756	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	ExerciseD (derivative)	27,220	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	ExerciseD (derivative)	2,505	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	Other	-28,666	123.04 USD	$3.5M	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2026	Exercise	72,849	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 6, 2026	AwardD (derivative)	7,938	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KLX Energy Services Holdings, Inc.Listing on record	Feb 2, 2026	Award	14,481	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Jan 5, 2026	Other	-794	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	Exercise	58,050	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	Other	-22,843	102.72 USD	$2.3M	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	ExerciseD (derivative)	2,755	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	ExerciseD (derivative)	28,076	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 12, 2025	ExerciseD (derivative)	27,219	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 6, 2025	AwardD (derivative)	7,515	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
KLX Energy Services Holdings, Inc.Listing on record	Feb 4, 2025	Award	5,658	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	Exercise	73,529	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	ExerciseD (derivative)	18,235	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	Other	-28,934	86.91 USD	$2.5M	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	ExerciseD (derivative)	28,076	—	n/a (No price was disclosed in the filing)	SEC
NATURAL RESOURCE PARTNERS LPListing on record	Feb 20, 2024	ExerciseD (derivative)	27,218	—	n/a (No price was disclosed in the filing)	SEC