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  4. [Form 4] AUTOMATIC DATA PROCESSING INC Insider Trading Activity

ADP VP granted 5,076 restricted stock units

Corporate Vice President Michael A. Bonarti reported an RSU grant and a concurrent share withholding for tax or exercise-price obligations at ADP.

Filing Impact
(Very High)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

AUTOMATIC DATA PROCESSING INC (ADP) reported that Corporate Vice President Michael A. Bonarti had two equity-related transactions on September 1, 2026. He received an award of 5,076 restricted stock units, each convertible into one share of common stock and vesting ratably over three years, and 7,726.947 shares of common stock were delivered or withheld to pay an exercise price or tax liability at $283.49 per share. No Rule 10b5-1 trading plan is indicated.

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Insider Bonarti Michael A
Role Corporate Vice President
Type Security Shares Price Value
Grant/Award Common Stock F1 5,076 $0.00 $0.00
Exercise Price or Tax Liability Common Stock 7,726.947 $283.49 $2.19M
Holdings After Transaction: Common Stock — 89,336.332 shares (Direct)
Footnotes (1)
  1. F1. In the form of restricted stock units, which are convertible into common stock on a one-for-one basis and vest ratably over 3 years.
Restricted stock units granted 5,076 units Award to Michael A. Bonarti on September 1, 2026, vesting over three years
Shares delivered or withheld 7,726.947 shares Used for payment of exercise price or tax liability on September 1, 2026
Per-share value for exercise price or tax liability $283.49 per share Applied to 7,726.947 shares of ADP common stock
Vesting period 3 years Restricted stock units vest ratably over three years
Number of acquire transactions 1 One grant or award acquisition reported in the summary data
Number of dispose transactions 1 One exercise-price-or-tax-liability disposition reported in the summary data
restricted stock units financial
"In the form of restricted stock units, which are convertible into common stock"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
vest ratably financial
"and vest ratably over 3 years"
tax liability financial
"Payment of exercise price or tax liability by delivering or withholding securities"
withholding securities financial
"by delivering or withholding securities"

FAQ

What did ADP insider Michael A. Bonarti acquire in this Form 4 filing for ADP?
He received 5,076 restricted stock units on September 1, 2026, each convertible into one share of ADP common stock and vesting ratably over three years.

What shares were disposed of or withheld in the ADP Form 4 for Michael A. Bonarti?
On September 1, 2026, 7,726.947 shares of ADP common stock were delivered or withheld to pay an exercise price or tax liability at $283.49 per share.

Were Michael A. Bonarti’s ADP transactions under a Rule 10b5-1 plan?
No. The filing’s Rule 10b5-1 checkbox is not marked as an affirmative plan, indicating no Rule 10b5-1 trading plan is reported for these transactions.

How do the new ADP restricted stock units for Michael A. Bonarti vest?
The 5,076 restricted stock units vest ratably over three years, meaning portions of the award convert into ADP common stock over that three-year period.

What price per share is associated with the withheld ADP shares in this filing?
The shares delivered or withheld for payment of exercise price or tax liability are reported at $283.49 per share for the 7,726.947 shares of ADP common stock.

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SEC Form 4
FORM 4UNITED 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*
Bonarti Michael A
(Last)(First)(Middle)
ONE ADP BOULEVARD
(Street)
ROSELAND NEW JERSEY 07068
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
AUTOMATIC DATA PROCESSING INC [ ADP ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Corporate Vice President
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock09/01/2026A5,076(1)A$0.000097,063.279D
Common Stock09/01/2026F7,726.947D$283.4989,336.332D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. In the form of restricted stock units, which are convertible into common stock on a one-for-one basis and vest ratably over 3 years.
David Kwon (POA on File)09/03/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR