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Occidental Petroleum Surges 45% YTD, Outpacing ConocoPhillips and Diamondback

Occidental Petroleum (OXY) shares have risen 45% year-to-date in 2026, leading major U.S. oil producers. ConocoPhillips (COP) gained 33% over the same period, while Diamondback Energy's performance was not specified. The question is whether OXY is genuinely outperforming or merely part of a broader sector rally.

May 19, 2026
2 min read
Source: 24/7 Wall St.
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Key Numbers

OXY YTD gain
45%
COP YTD gain
33%
Diamondback YTD gain
not specified

Occidental Petroleum (NYSE:OXY) shares have surged 45% year-to-date (YTD) heading into Tuesday's open, making it one of the top performers among large U.S. oil producers in 2026. The rally raises the question of whether OXY is genuinely outpacing its peers or simply leading a tightly packed group.

Key Oil Stock Performance

TickerCompanyYTD Performance
OXYOccidental Petroleum+45%
COPConocoPhillips+33%
FANGDiamondback EnergyNot specified

Possible Drivers

OXY's outperformance may be attributed to:

  • Berkshire Hathaway's backing: Berkshire Hathaway (BRK-B) continues to increase its stake in Occidental, boosting investor confidence.
  • Focus on shareholder returns: The company has maintained a strong dividend and share buyback program.
  • Operational efficiency: Occidental has improved production efficiency and reduced costs.

Sector Context

The broader oil sector has performed well in 2026, supported by rising oil prices and stable demand. However, geopolitical risks and potential economic slowdown remain headwinds.

What This Means for Investors

OXY's relative strength is notable, but investors should monitor oil price trends, Federal Reserve policy, and any changes in Berkshire Hathaway's position. Short-term performance alone should not drive investment decisions.

Frequently Asked Questions

Occidental Petroleum (OXY) shares have gained 45% year-to-date as of May 19, 2026.

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This article was rewritten in Wrqti's editorial style based on information from the original source above. Content is informational only — not investment advice.