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OXY - Occidental Petroleum Corp /De/

Insider Purchase by Klesse William R (Dir)

3 Months
After Trade
Before Trade

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Trade Summary

2 months ago, Klesse William R, serving as Dir at Occidental Petroleum Corp /De/ (OXY), purchased 5,000 shares at $38.98 per share, for a total transaction value of $194,900.00. Following this transaction, Klesse William R now holds 218,913 shares of OXY.

This purchase represents a 2.00% increase in Klesse William R's stake in the company. This is considered a medium-conviction trade.

The trade was executed on Tuesday, December 16, 2025 and publicly disclosed via SEC Form 4 filing on Wednesday, December 17, 2025, 1 day after the trade was made.

Occidental Petroleum Corp /De/ operates in the ENERGY sector, specifically within the OIL & GAS E&P industry. Insider buying activity in this sector can provide valuable signals about industry trends and company-specific developments.

Klesse William R

Dir

William R. Klesse (born 1947) is an independent director at Occidental Petroleum Corporation (OXY) since 2013, where he chairs the Environmental, Health & Safety Committee and serves on the Executive Compensation Committee.[[1]](https://fintool.com/app/research/companies/OXY/people/william-klesse)[[3]](https://app.boardroomalpha.com/profiles/people/A1002464-WILLIAM_R_KLESSE) As of late 2025, he owns approximately 218,913 shares of OXY stock valued over $9 million and has engaged in recent insider trading activities.[[5]](https://www.gurufocus.com/insider/12206/william-r-klesse)[[4]](https://www.marketscreener.com/insider/WILLIAM-KLESSE-A002M8/) Klesse had a distinguished 45-year career in the energy sector, starting as a trainee at Diamond Shamrock in 1969 and rising through roles at its successors, Ultramar Diamond Shamrock and Valero Energy.[[1]](https://fintool.com/app/research/companies/OXY/people/william-klesse)[[6]](https://klesse.utsa.edu/benefactor/) At Valero, he served as Executive Vice President and COO (2003–2005), President (2008–2013), CEO (2006–2014), and Chairman (2007–2014).[[1]](https://fintool.com/app/research/companies/OXY/people/william-klesse)[[2]](https://en.wikipedia.org/wiki/William_R._Klesse) He holds a B.S. in Chemical Engineering from the University of Dayton and an MBA in Finance from West Texas A&M University.[[1]](https://fintool.com/app/research/companies/OXY/people/william-klesse)[[2]](https://en.wikipedia.org/wiki/William_R._Klesse) Klesse also serves on boards of non-profits including the University of Dayton and Texas Biomedical Research Institute.[[1]](https://fintool.com/app/research/companies/OXY/people/william-klesse)

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Trade Price

$38.98

Quantity

5,000

Total Value

$194,900.00

Shares Owned

218,913

Trade Date

Tuesday, December 16, 2025

68 days ago

SEC Filing Date

Wednesday, December 17, 2025

Filed 1 day after trade

ENERGYOIL & GAS E&P

About Occidental Petroleum Corp /De/

Company Overview

No company information available
View news mentioning OXY

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