S&T Bancorp director adds shares via RSU exercise

S&T Bancorp Inc. director Michael J. Donnelly increased his equity stake through restricted stock activity.

Rhea-AI Filing Summary

S&T Bancorp Inc. director Michael J. Donnelly increased his equity stake through restricted stock activity. On May 12, 2026, he exercised 1,290 shares of Director Restricted Stock Units into common stock, reflecting a reported value of $44.03 per share, bringing his direct common stock holdings to 23,374 shares.

On the same date, he also received a new grant of 1,136 Director Restricted Stock Units, each representing a contingent right to one share of common stock that vests in 364 days from issuance. Separately, 17,564 common shares are reported as held indirectly through Indiana Printing & Publishing Company.

Insider Trade Summary

1,290 shares exercised/converted

Exercise 4 txns

Insider DONNELLY MICHAEL J

Role Director

Type	Security	Shares	Price	Value
Exercise	Director Restricted Stock Units	1,290	$0.00	$0.00
Grant/Award	Director Restricted Stock Units	1,136	$0.00	$0.00
Exercise	Common Stock	1,290	$44.03	$57K
holding	Common Stock	--	--	--

Holdings After Transaction: Director Restricted Stock Units — 1,136 contracts (Direct); Common Stock — 23,374 shares (Direct); Common Stock — 17,564 shares (Indirect, Indiana Printing & Publishing Company)

Footnotes (3)

1. F1. Upon vest, automatically converts into equal number of shares of common stock.
2. F2. Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.
3. F3. The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

Key Figures

RSUs exercised: 1,290 shares Exercise value per share: $44.03 per share New RSU grant: 1,136 units +3 more

6 metrics

RSUs exercised 1,290 shares Director Restricted Stock Units converted to common stock on May 12, 2026

Exercise value per share $44.03 per share Reported price for 1,290 common shares acquired

New RSU grant 1,136 units Director Restricted Stock Units granted on May 12, 2026

Direct common shares after 23,374 shares Direct S&T Bancorp common stock holdings following transactions

Indirect common shares 17,564 shares Indirectly held via Indiana Printing & Publishing Company

Derivative exercises 1 transaction, 1,290 shares Exercise or conversion of derivative security on May 12, 2026

Key Terms

Director Restricted Stock Units, contingent right, exercise or conversion of derivative security, indirect ownership

4 terms

Director Restricted Stock Units financial

"Director Restricted Stock Units vest in 364 days from date of issuance."

Director restricted stock units are promises by a company to give board members company shares in the future, usually after a set time or when certain conditions are met. They matter to investors because they can dilute existing shareholders when converted to shares and reveal how the board’s pay is tied to the company’s performance—like a delayed paycheck in company stock that aligns a director’s interests with shareholders and can affect share supply when released.

contingent right financial

"Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock."

exercise or conversion of derivative security financial

"transaction_code_description: Exercise or conversion of derivative security"

indirect ownership financial

"ownership_type: indirect; nature_of_ownership: Indiana Printing & Publishing Company"

FAQ

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

What did S&T Bancorp (STBA) director Michael J. Donnelly report on this Form 4?

Michael J. Donnelly reported equity-related acquisitions. He exercised 1,290 Director Restricted Stock Units into S&T Bancorp common stock and received a new grant of 1,136 restricted stock units, while updating his direct and indirect share ownership positions.

How many S&T Bancorp (STBA) shares does Michael J. Donnelly hold directly after the transactions?

After the reported transactions, Michael J. Donnelly holds 23,374 shares of S&T Bancorp common stock directly. This figure reflects the addition of 1,290 shares from the exercise of Director Restricted Stock Units recorded on the same Form 4.

What new restricted stock units did Michael J. Donnelly receive from S&T Bancorp (STBA)?

He received a grant of 1,136 Director Restricted Stock Units. Each unit represents a contingent right to receive one share of S&T Bancorp common stock and, per the disclosure, these units vest 364 days from the date of issuance.

How many S&T Bancorp (STBA) shares are reported as indirectly owned by Michael J. Donnelly?

The Form 4 reports 17,564 shares of S&T Bancorp common stock held indirectly through Indiana Printing & Publishing Company. These shares are listed as indirect ownership, separate from his directly held position.

Were there any S&T Bancorp (STBA) share sales reported by Michael J. Donnelly on this Form 4?

The Form 4 does not report any sales of S&T Bancorp common stock. The transactions shown are an exercise of 1,290 restricted stock units into common shares and a new grant of 1,136 restricted stock units.

How do Michael J. Donnelly’s Director Restricted Stock Units in S&T Bancorp (STBA) work?

Each Director Restricted Stock Unit is a contingent right to receive one S&T Bancorp common share. The filing explains that units automatically convert into common stock upon vesting, with vested shares delivered to the reporting person at that time.

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

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Accepted by SEC EDGAR 05/14/2026 - 03:53 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).

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^*

DONNELLY MICHAEL J

(Last) (First) (Middle)

800 PHILADELPHIA STREET

(Street)

INDIANA PENNSYLVANIA 15701

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
S&T BANCORP INC [ STBA ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/12/2026

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	05/12/2026		M(1)		1,290	A	$44.03	23,374	D
Common Stock								17,564	I	Indiana Printing & Publishing Company

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
Director Restricted Stock Units	(2)	05/12/2026		M(1)			1,290	(3)	(3)	Common Stock	1,290	$0	0	D
Director Restricted Stock Units	(2)	05/12/2026		A		1,136		(3)	(3)	Common Stock	1,136	$0	1,136	D

Explanation of Responses:

1. Upon vest, automatically converts into equal number of shares of common stock.

2. Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock.

3. The restricted stock units vest in 364 days from date of issuance. Vested shares will be delivered to the reporting person upon vesting.

Remarks:

	/s/ Jackie Kennane, attorney-in-fact for Michael J. Donnelly	05/14/2026
	** 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.
* Form 4: SEC 1474 (03-26)