ADP's Maria Black plans $8.4M stock sale

Maria Black’s Rule 144 proposal would sell up to 29,810 ADP shares, with an indicated market value of about $8.44M as of Sept. 2.

Rhea-AI Filing Summary

AUTOMATIC DATA PROCESSING INC (ADP) has a notice of proposed sale under Rule 144 filed on behalf of Maria Black for up to 29,810 shares of ADP common stock. The shares were acquired from the issuer on September 1, 2026 through restricted stock vesting and are to be sold through Fidelity Brokerage Services LLC, with an indicated aggregate market value of $8,436,230 as of September 2, 2026 on NASDAQ.

Key Figures

Shares proposed to be sold: 29,810 shares Aggregate market value: $8,436,230 Acquisition date of shares: September 1, 2026 +1 more

4 metrics

Shares proposed to be sold 29,810 shares Maximum amount of ADP common stock covered by the Rule 144 notice

Aggregate market value $8,436,230 Value of 29,810 ADP shares as of September 2, 2026 on NASDAQ

Acquisition date of shares September 1, 2026 Date the ADP shares were acquired via restricted stock vesting

Security type Common stock Class of ADP securities covered by the Form 144 notice

Key Terms

Rule 144, restricted stock vesting, attorney-in-fact, compensation

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock vesting financial

"Common | 09/01/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as attorney-in-fact for Maria Black"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

compensation financial

"09/01/2026 | Compensation"

FAQ

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

What does the Form 144 filing mean for ADP shareholders?

The filing reports a proposed Rule 144 sale of 29,810 shares of Automatic Data Processing Inc (ADP) common stock by Maria Black. It is a notice of potential resale of restricted or control securities and does not itself execute any trades.

How many ADP (ADP) shares are covered by Maria Black’s Form 144?

The notice covers up to 29,810 shares of Automatic Data Processing Inc common stock. This is the maximum amount indicated as proposed to be sold under Rule 144 through Fidelity Brokerage Services LLC.

What is the approximate value of the ADP shares in this Form 144?

The filing indicates an aggregate market value of $8,436,230 for the 29,810 ADP common shares covered, based on market data as of September 2, 2026 on NASDAQ.

How and when did Maria Black acquire the ADP shares in this Form 144?

The shares were acquired on September 1, 2026 from Automatic Data Processing Inc through restricted stock vesting, characterized in the filing as compensation from the issuer.

Who is handling the proposed sale of these ADP (ADP) shares?

The proposed sale of up to 29,810 ADP common shares is to be effected through Fidelity Brokerage Services LLC, which is listed as the broker in the Form 144 filing.

Does the Form 144 filing state any recent ADP share sales by Maria Black?

The section for securities sold during the past 3 months does not list any entries, indicating no such sales are reported in this notice for that period.

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

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Available on EDGAR 09/02/2026 - 11:36 AM EDT Accepted by SEC EDGAR 09/02/2026 - 11:36 AM EDT Learn about SEC filing dates

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	0001608466
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	Black Maria
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
Relationship to Issuer	Director

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	29810	8436230.00	397262737	09/02/2026	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	09/01/2026	Restricted Stock Vesting	Issuer			29810	09/01/2026	Compensation

* 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/04/2025
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/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Maria Black
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)