Occidental Petroleum Corporation
CH ˙ SWX ˙ US6745991058
SecurityCH:OXY / Occidental Petroleum Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership499,702 shares
Latest Disclosed Value $ 20,548,039
Sei Investments Co ownership in OXY / Occidental Petroleum Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 499,702 shares of Occidental Petroleum Corporation (CH:OXY) valued at $20,548,039 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 482,127 shares of Occidental Petroleum Corporation. This represents a change in shares of 3.65% during the quarter.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (OXY) in the form of stock options.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

CH:OXY / Occidental Petroleum Corporation Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F OCCIDENTAL PETE COM 674599105 499,702 17,575 3.65 20,548 -9.80 0.0203
2025-11-13 2025-09-30 13F OCCIDENTAL PETE COM 674599105 482,127 9,047 1.91 22,781 14.63 0.0245
2025-08-14 2025-06-30 13F OCCIDENTAL PETE COM 674599105 473,080 -95,382 -16.78 19,874 -29.17 0.0230
2025-05-14 2025-03-31 13F/A-1 OCCIDENTAL PETE COM 674599105 568,462 -190,844 -25.13 28,059 -25.21 0.0361
2025-05-13 2025-03-31 13F OCCIDENTAL PETE COM 674599105 701,083 -58,223 34,638 0.0377
2025-02-11 2024-12-31 13F OCCIDENTAL PETE COM 674599105 759,306 9,407 1.25 37,518 -2.93 0.0482
2024-11-12 2024-09-30 13F OCCIDENTAL PETE COM 674599105 749,899 132,562 21.47 38,650 -0.67 0.0502
2024-08-13 2024-06-30 13F OCCIDENTAL PETE COM 674599105 617,337 -28,953 -4.48 38,911 -7.35 0.0551
2024-05-07 2024-03-31 13F OCCIDENTAL PETE COM 674599105 646,290 28,547 4.62 42,000 13.86 0.0615
2024-02-14 2023-12-31 13F OCCIDENTAL PETE COM 674599105 617,743 43,775 7.63 36,887 -0.95 0.0592
2023-11-14 2023-09-30 13F OCCIDENTAL PETE COM 674599105 573,968 188,763 49.00 37,239 64.41 0.0669
2023-08-11 2023-06-30 13F OCCIDENTAL PETE COM 674599105 385,205 7,853 2.08 22,650 -3.85 0.0395
2023-05-12 2023-03-31 13F OCCIDENTAL PETE COM 674599105 377,352 21,741 6.11 23,558 5.17 0.0438
2023-02-10 2022-12-31 13F OCCIDENTAL PETE COM 674599105 355,611 -15,431 -4.16 22,400 -1.76 0.0498
2022-11-14 2022-09-30 13F OCCIDENTAL PETE COM 674599105 371,042 -12,853 -3.35 22,801 0.86 0.0509
2022-08-15 2022-06-30 13F OCCIDENTAL PETE COM 674599105 383,895 -5,687 -1.46 22,606 2.21 0.0488
2022-05-13 2022-03-31 13F OCCIDENTAL PETE COM 674599105 389,582 -82,520 -17.48 22,117 61.65 0.0445
2022-02-14 2021-12-31 13F OCCIDENTAL PETE COM 674599105 472,102 -2,839 -0.60 13,682 -2.62 0.0257
2021-11-12 2021-09-30 13F OCCIDENTAL PETE COM 674599105 474,941 2,314 0.49 14,050 -4.93 0.0295
2021-08-06 2021-06-30 13F OCCIDENTAL PETE COM 674599105 472,627 -13,225 -2.72 14,779 14.27 0.0328
2021-05-12 2021-03-31 13F OCCIDENTAL PETE COM 674599105 485,852 -35,000 -6.72 12,933 43.44 0.0326
2021-02-08 2020-12-31 13F OCCIDENTAL PETE COM 674599105 520,852 0 0.00 9,016 72.92 0.0233
2020-12-04 2020-09-30 13F/A-1 OCCIDENTAL PETE COM 674599105 520,852 -32,431 -5.86 5,214 -48.50 0.0151
2020-11-06 2020-09-30 13F OCCIDENTAL PETE COM 674599105 521,975 -31,308 5,225 12,580.6383
2020-08-17 2020-06-30 13F/A-1 OCCIDENTAL PETE COM 674599105 553,283 -323,198 -36.87 10,125 -0.24 0.0314
2020-08-11 2020-06-30 13F OCCIDENTAL PETE COM 674599105 890,183 13,702 36,390 98,709.8120
2020-05-14 2020-03-31 13F OCCIDENTAL PETE COM 674599105 876,481 -56,425 -6.05 10,149 -73.58 0.0373
2020-02-06 2019-12-31 13F OCCIDENTAL PETE COM 674599105 932,906 -212,391 -18.54 38,407 -24.54 0.1146
2019-11-12 2019-09-30 13F OCCIDENTAL PETE COM 674599105 1,145,297 362,475 46.30 50,900 29.12 0.1302
2019-08-14 2019-06-30 13F OCCIDENTAL PETE COM 674599105 782,822 178,982 29.64 39,421 -1.47 0.1288
2019-05-15 2019-03-31 13F OCCIDENTAL PETE COM 674599105 603,840 47,870 8.61 40,011 -8.82 0.1344
2019-02-13 2018-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 555,970 37,689 7.27 43,879 3.09 0.1562
2018-11-08 2018-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 518,281 73,557 16.54 42,565 14.37 0.1543
2018-08-03 2018-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 444,724 -29,474 -6.22 37,216 20.82 0.1265
2018-05-11 2018-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 474,198 3,927 0.84 30,802 -11.08 0.1181
2018-02-08 2017-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 470,271 -77,172 -14.10 34,640 -1.46 0.1203
2017-11-06 2017-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 547,443 32,791 6.37 35,152 14.08 0.1249
2017-07-31 2017-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 514,652 -87,944 -14.59 30,813 -19.30 0.1228
2017-05-05 2017-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 602,596 60,765 11.21 38,180 -1.07 0.1673
2017-02-02 2016-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 541,831 18,488 3.53 38,594 1.13 0.1869
2016-11-04 2016-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 523,343 -61,629 -10.54 38,162 -13.66 0.1939
2016-08-11 2016-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 584,972 -20,036 -3.31 44,200 6.76 0.2651
2016-05-10 2016-03-31 13F/A-1 OCCIDENTAL PETE CORP DEL COM 674599105 605,008 -62,204 -9.32 41,401 -8.22 0.2577
2016-02-03 2015-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 667,212 272,403 69.00 45,110 72.72 0.2749
2015-11-02 2015-09-30 13F/A-1 OCCIDENTAL PETE CORP DEL COM 674599105 394,809 -27,817 -6.58 26,117 -20.54 0.2397
2015-10-30 2015-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 394,809 26,117
2015-08-07 2015-06-30 13F/A-1 OCATA THERAPEUTICS PUT 674599105 0 -549,963 -100.00 0 -100.00
2015-08-07 2015-06-30 13F/A-1 OCCIDENTAL PETE CORP DEL COM 674599105 422,626 -127,337 -23.15 32,867 -18.13 0.2971
2015-08-04 2015-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 422,626 -127,337 32,867 0.2971
2015-05-14 2015-03-31 13F/A-1 OCCIDENTAL PETE CORP DEL COM 674599105 549,963 280 0.05 40,145 -9.39 0.3486
2015-05-01 2015-03-31 13F OCATA THERAPEUTICS PUT 674599105 549,963 549,963 40,145 0.3486
2015-02-10 2014-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 549,683 549,683 44,305 0.3916
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2015-08-07 2015-06-30 13F/A OCATA THERAPEUTICS PUT 0 -100.00 0 -100.00 n/a n/a n/a
2015-05-01 2015-03-31 13F OCATA THERAPEUTICS PUT 549,963 40,145 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.