ADP executive sells 543 shares under trading plan

Automatic Data Processing corporate vice president Christopher D'Ambrosio reported a sale of 543 shares of common stock on January 13, 2026.

Rhea-AI Filing Summary

Automatic Data Processing corporate vice president Christopher D'Ambrosio reported a sale of 543 shares of common stock on January 13, 2026. The shares were sold at a price of $262.29 per share, and he held 9,998.23 shares directly after the transaction.

The filing notes that this transaction was carried out under a Rule 10b5-1 trading plan adopted by the reporting person in September 2025, indicating it was pre-arranged rather than an ad hoc trade.

Insider Trade Summary

Net Seller: 543 shares

Net Sell 1 txn

Insider D'Ambrosio Christopher

Role Corp. VP

Sold 543 shs ($142K)

Type	Security	Shares	Price	Value
Sale	Common Stock	543	$262.29	$142K

Holdings After Transaction: Common Stock — 9,998.23 shares (Direct)

Footnotes (1)

1. F1. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ADP report in this Form 4?

The Form 4 reports that Christopher D'Ambrosio, a corporate vice president of Automatic Data Processing (ADP), sold 543 shares of common stock on January 13, 2026.

At what price were the ADP shares sold in the Form 4 transaction?

The 543 ADP shares were sold at a price of $262.29 per share, according to the Form 4.

How many ADP shares does Christopher D'Ambrosio own after this sale?

After the reported sale, Christopher D'Ambrosio beneficially owned 9,998.23 shares of ADP common stock in direct ownership.

Was the ADP insider sale made under a Rule 10b5-1 trading plan?

Yes. The Form 4 states that the transactions were effected under a Rule 10b5-1 trading plan adopted by the reporting person in September 2025.

What is the role of the reporting person in ADP?

The reporting person, Christopher D'Ambrosio, is identified as an officer of Automatic Data Processing with the title Corp. VP.

Is the ADP Form 4 filed for one or multiple reporting persons?

The Form 4 is indicated as being filed by one reporting person, covering the transactions of Christopher D'Ambrosio only.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 01/14/2026 - 04:11 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).

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^*

D'Ambrosio Christopher

(Last) (First) (Middle)

ONE ADP BOULEVARD

(Street)

ROSELAND NJ 07068

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
AUTOMATIC DATA PROCESSING INC [ ADP ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
01/13/2026

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	01/13/2026		S		543(1)	D	$262.29	9,998.23	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 transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025.

	Michael A. Bonarti (POA on file)	01/14/2026
	** 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.