Occidental Petroleum director buys 5,000 shares of company stock

Occidental Petroleum director William R. Klesse acquired 5,000 shares of the company’s common stock on 12/16/2025 at $38.98 per share.

Rhea-AI Filing Summary

Occidental Petroleum director William R. Klesse acquired 5,000 shares of the company’s common stock on 12/16/2025 at $38.98 per share. After this purchase, he directly beneficially owns 218,913 Occidental Petroleum shares, highlighting his personal equity stake as a member of the board.

Insider Trade Summary

Net Buyer: 5,000 shares

Net Buy 1 txn

Insider KLESSE WILLIAM R

Role Director

Bought 5,000 shs ($195K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	5,000	$38.98	$195K

Holdings After Transaction: Common Stock — 218,913 shares (Direct)

FAQ

What insider stock transaction did Occidental Petroleum (OXY) report in this filing?

The report shows that director William R. Klesse acquired 5,000 shares of Occidental Petroleum common stock on 12/16/2025 at a price of $38.98 per share.

Who is the reporting person in the Occidental Petroleum (OXY) insider transaction?

The reporting person is William R. Klesse, identified in the signature block, and his relationship to Occidental Petroleum is checked as a Director.

On what date did the Occidental Petroleum (OXY) stock purchase occur?

The transaction date is listed as 12/16/2025 in Table I for the common stock acquisition.

At what price were the Occidental Petroleum (OXY) shares acquired by the director?

The 5,000 shares of Occidental Petroleum common stock were acquired at a price of $38.98 per share, as shown in the non-derivative securities table.

How many Occidental Petroleum (OXY) shares does the director own after the transaction?

Following the reported transaction, William R. Klesse beneficially owns 218,913 shares of Occidental Petroleum common stock, held with direct ownership.

Were any derivative securities reported in this Occidental Petroleum (OXY) insider filing?

The section labeled Table II - Derivative Securities is present, but it does not list any derivative security transactions for this reporting person.

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Accepted by SEC EDGAR 12/17/2025 - 05:00 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

KLESSE WILLIAM R

(Last) (First) (Middle)

OCCIDENTAL PETROLEUM CORPORATION

5 GREENWAY PLAZA, STE. 110

(Street)

HOUSTON, TX 77046

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
OCCIDENTAL PETROLEUM CORP /DE/ [ OXY ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/16/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/16/2025		P		5,000	A	$38.98	218,913	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit List Exhibit 24 - Power of Attorney

	/s/ Brittany A. Smith, Attorney-in-Fact for William R. Klesse	12/17/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.