KLESSE WILLIAM R

Director at NuStar Energy L.P. · on record since Jan 25, 2006
Director at VALERO ENERGY CORP/TX · on record since Jan 20, 2006
Director at VALERO ENERGY PARTNERS LP · on record since Dec 16, 2013
EVP and COO at VALERO ENERGY CORP/TX · on record since Oct 31, 2003
Director at OCCIDENTAL PETROLEUM CORP /DE/ · on record since May 6, 2026
Former COB at VALERO ENERGY PARTNERS LP · on record since Apr 22, 2014
Retiring COB at VALERO ENERGY CORP/TX · on record since Jan 6, 2015

Insider trading activity of KLESSE WILLIAM R

Transactions on record: 357; since Oct 31, 2003

Open-market buys: 16; $6.6M

Open-market sells: 76; $93.7M

Companies traded: 4; last filing May 6, 2026

Figures computed from official regulatory filings — .

Companies where KLESSE WILLIAM R has traded

OCCIDENTAL PETROLEUM CORP /DE/47 tx · $7.9M · May 6, 2026
VALERO ENERGY CORP/TX298 tx · $153.3M · Nov 17, 2014
VALERO ENERGY PARTNERS LP1 tx · $2.3M · Dec 16, 2013
NuStar Energy L.P.11 tx · $1.7M · Feb 8, 2006

Track record of KLESSE WILLIAM R

Statistical track record

Free account

Open-market buys: 17

Last buy: Dec 16, 2025

Win rates, median returns and the proven-insider analysis come with a free account.

Transaction history of KLESSE WILLIAM R

Co-insiders of KLESSE WILLIAM R

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 6, 2026	Other	-913	60.27 USD	$55K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 6, 2026	Award	4,149	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Dec 17, 2025	Buy	5,000	38.98 USD	$194.9K	conv 39First in 12mo	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 7, 2025	Award	6,442	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 7, 2025	Other	-1,418	38.81 USD	$55K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Apr 2, 2025	OtherD (derivative)	-25,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Apr 2, 2025	Other	25,900	21.30 USD	$551.7K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 7, 2024	Other	-855	64.39 USD	$55.1K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 7, 2024	Award	3,883	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 10, 2023	Award	3,817	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 10, 2023	Other	-840	58.96 USD	$49.5K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 11, 2022	Other	-857	57.84 USD	$49.6K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 11, 2022	Award	3,891	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 12, 2021	Other	-1,653	26.63 USD	$44K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 12, 2021	Award	7,511	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Aug 26, 2020	Buy	10,000	13.43 USD	$134.3K	conv 29	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Aug 26, 2020	BuyD (derivative)	10,000	3.10 USD	$31K	Unusual size	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Jun 3, 2020	Award	11,405	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Jun 3, 2020	Other	-2,510	13.81 USD	$34.7K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Mar 16, 2020	Buy	20,000	11.81 USD	$236.2K	conv 44Cluster	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Dec 9, 2019	Buy	10,000	38.82 USD	$388.2K	conv 37Cluster	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Nov 20, 2019	Buy	6,000	38.09 USD	$228.5K	conv 24	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Nov 12, 2019	Buy	12,000	39.31 USD	$471.7K	conv 39Cluster	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Sep 30, 2019	Buy	5,000	45.54 USD	$227.7K	conv 37Cluster	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Aug 13, 2019	Buy	5,000	44.96 USD	$224.8K	conv 38ClusterUnusual size	SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 6, 2026	Other	-913	60.27 USD	$55K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 6, 2026	Award	4,149	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Dec 17, 2025	Buy	5,000	38.98 USD	$194.9K	conv 39First in 12mo	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 7, 2025	Award	6,442	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 7, 2025	Other	-1,418	38.81 USD	$55K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Apr 2, 2025	OtherD (derivative)	-25,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Apr 2, 2025	Other	25,900	21.30 USD	$551.7K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 7, 2024	Other	-855	64.39 USD	$55.1K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 7, 2024	Award	3,883	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 10, 2023	Award	3,817	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 10, 2023	Other	-840	58.96 USD	$49.5K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 11, 2022	Other	-857	57.84 USD	$49.6K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 11, 2022	Award	3,891	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 12, 2021	Other	-1,653	26.63 USD	$44K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	May 12, 2021	Award	7,511	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Aug 26, 2020	Buy	10,000	13.43 USD	$134.3K	conv 29	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Aug 26, 2020	BuyD (derivative)	10,000	3.10 USD	$31K	Unusual size	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Jun 3, 2020	Award	11,405	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Jun 3, 2020	Other	-2,510	13.81 USD	$34.7K		SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Mar 16, 2020	Buy	20,000	11.81 USD	$236.2K	conv 44Cluster	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Dec 9, 2019	Buy	10,000	38.82 USD	$388.2K	conv 37Cluster	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Nov 20, 2019	Buy	6,000	38.09 USD	$228.5K	conv 24	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Nov 12, 2019	Buy	12,000	39.31 USD	$471.7K	conv 39Cluster	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Sep 30, 2019	Buy	5,000	45.54 USD	$227.7K	conv 37Cluster	SEC
OCCIDENTAL PETROLEUM CORP /DE/Listing on record	Aug 13, 2019	Buy	5,000	44.96 USD	$224.8K	conv 38ClusterUnusual size	SEC