Halliburton (NYSE: HAL) exec sells 20,348 shares under 10b5-1 plan

Rhea-AI Filing Summary

Halliburton Company executive Michael Casey, President – Western Hemisphere, sold 20,348 shares of common stock in open-market transactions. The sales occurred on May 5, 2026 at prices of $42.00 and $41.84 per share and were effected under a Rule 10b5-1 trading plan adopted on February 3, 2026. A footnote also notes 656.906 shares previously purchased through the Halliburton Employee Stock Purchase Plan for the period ending March 31, 2026.

Insider Trade Summary 10b5-1

Net Seller: 20,348 shares ($852,445)

Net Sell 2 txns

Insider Maxwell Michael Casey

Role President - Western Hemisphere

Sold 20,348 shs ($852K)

Type	Security	Shares	Price	Value
Sale	Common Stock	13,566	$41.84	$568K
Sale	Common Stock	6,782	$42.00	$285K

Holdings After Transaction: Common Stock — 100,544.783 shares (Direct, null)

Footnotes (1)

1. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 3, 2026. Includes 656.906 shares of stock purchased through the Halliburton Company Employee Stock Purchase Plan for the period ending March 31, 2026.

Key Figures

Shares sold at $42.00: 6,782 shares Shares sold at $41.84: 13,566 shares Total shares sold: 20,348 shares +3 more

6 metrics

Shares sold at $42.00 6,782 shares Open-market sale of Halliburton common stock on May 5, 2026 at $42.00 per share

Shares sold at $41.84 13,566 shares Open-market sale of Halliburton common stock on May 5, 2026 at $41.84 per share

Total shares sold 20,348 shares Net sell volume in Halliburton common stock reported in this Form 4

Rule 10b5-1 plan adoption date February 3, 2026 Date Michael Casey adopted the trading plan governing these sales

Employee Stock Purchase Plan shares 656.906 shares Shares purchased through the Halliburton Employee Stock Purchase Plan for period ending March 31, 2026

Sale price range $41.84–$42.00 per share Per-share prices for the two reported open-market sales of Halliburton common stock

Key Terms

Rule 10b5-1 trading plan, Employee Stock Purchase Plan, open-market sale, non-derivative

4 terms

Rule 10b5-1 trading plan regulatory

"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Employee Stock Purchase Plan financial

"shares of stock purchased through the Halliburton Company Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

non-derivative financial

"transaction_type: non-derivative"

Form 4 Insider Transactions: What Each Field Means →

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).

X

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^*

Maxwell Michael Casey

(Last) (First) (Middle)

3000 NORTH SAM HOUSTON PARKWAY E.

(Street)

HOUSTON TEXAS 77032

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
HALLIBURTON CO [ HAL ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President - Western Hemisphere

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/05/2026

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

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

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

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	05/05/2026		S(1)		13,566	D	$41.84	100,544.783	D
Common Stock	05/05/2026		S(1)		6,782	D	$42	93,762.783(2)	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:

1. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 3, 2026.

2. Includes 656.906 shares of stock purchased through the Halliburton Company Employee Stock Purchase Plan for the period ending March 31, 2026.

Remarks:

	/s/ Sarah I. Rubenfeld, by Power of Attorney	05/06/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What did Halliburton (HAL) executive Michael Casey report in this Form 4?

Michael Casey reported selling 20,348 shares of Halliburton common stock in open-market transactions. The trades occurred on May 5, 2026 and were executed at prices of $42.00 and $41.84 per share, according to the Form 4 filing’s transaction details and summary.

How many Halliburton (HAL) shares did Michael Casey sell and at what prices?

Michael Casey sold a total of 20,348 Halliburton shares. The filing shows 6,782 shares sold at $42.00 per share and 13,566 shares sold at $41.84 per share, both classified as open-market sales of non-derivative common stock on May 5, 2026.

Was Michael Casey’s Halliburton (HAL) stock sale under a Rule 10b5-1 plan?

Yes. A footnote states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted by Michael Casey on February 3, 2026. Rule 10b5-1 plans pre-schedule trades, indicating the timing of these sales was arranged in advance rather than decided spontaneously.

Does the Halliburton (HAL) Form 4 mention employee stock purchase plan shares?

Yes. A footnote explains the reported holdings include 656.906 shares bought through the Halliburton Company Employee Stock Purchase Plan. These shares relate to purchases for the period ending March 31, 2026, and are part of Michael Casey’s non-derivative common stock position.

What type of transactions are shown in Michael Casey’s Halliburton (HAL) Form 4?

The Form 4 shows two non-derivative transactions coded as “S,” meaning open-market or private sales of common stock. Both transactions are classified as direct ownership, and together they represent a net sell of 20,348 Halliburton shares according to the transaction summary section.