AUTOMATIC DATA PROCESSING INC SEC Filing

ADP affiliate filed Form 144 to sell shares.

Accepted by SEC EDGAR 03/16/2026 - 10:30 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

ADP affiliate filed Form 144 to sell shares. The filing reports proposed sales of 543 shares of Common stock, with prior sales of 543 shares on 01/13/2026 for $142,423.47 and 543 shares on 02/17/2026 for $115,349.49.

The record lists broker/dealer Fidelity Brokerage Services LLC and multiple earlier compensatory issuances and option exercises recorded by the filer. The filing is a routine affiliate resale notice under Form 144.

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Securities Compliance Officer

Routine Form 144 resale notice showing two recent 543-share transactions.

The filing lists proposed sales of 543 shares and discloses two prior sales: $142,423.47 on 01/13/2026 and $115,349.49 on 02/17/2026. It names Fidelity Brokerage Services LLC as the broker/dealer.

These disclosures meet ordinary Section 144 reporting practice for affiliates. Cash‑flow counterparties and broader proceeds treatment are not detailed in the excerpt; subsequent filings or transaction confirmations would show settlement details.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001866614
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	AUTOMATIC DATA PROCESSING INC
SEC File Number	001-05397
Address of Issuer	ONE ADP BOULVARD ROSELAND NEW JERSEY 07068
Phone	9739745000
Name of Person for Whose Account the Securities are To Be Sold	D'Ambrosio Christopher
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	543	113188.35	402644364	03/16/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/01/2020	Restricted Stock Vesting	Issuer			59	09/01/2020	Compensation
Common	09/01/2021	Restricted Stock Vesting	Issuer			317	09/01/2021	Compensation
Common	02/07/2022	Stock Option Exercise	Issuer			26	02/07/2022	Cash
Common	02/08/2022	Stock Option Exercise	Issuer			66	02/08/2022	Cash
Common	05/09/2022	Stock Option Exercise	Issuer			29	05/09/2022	Cash
Common	05/10/2022	Stock Option Exercise	Issuer			46	05/10/2022	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Christopher D'ambrosio One ADP Boulevard Roseland NJ 07068	Common	01/13/2026	543	142423.47
Christopher D'ambrosio One ADP Boulevard Roseland NJ 07068	Common	02/17/2026	543	115349.49

144: Remarks and Signature

Remarks
Date of Notice	03/16/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/07/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Gerardo Ibarra-Munoz, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Christopher D'ambrosio
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)