S&T BANCORP INC — Director's Dealing 2013

May 1, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: S&T BANCORP INC (STBA)
CIK: 0000719220
Period of Report: 2013-04-29

Reporting Person: HAUCK EDWARD C (SR EXECUTIVE VICE PRESIDENT)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-04-29	Common Stock	S	4178	$18.714	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-01	Stock Options (Right to Buy)	$29.965	D	5000	Disposed	2013-12-15	Common Stock (5000)	Direct
2013-05-01	Stock Options (Right to Buy)	$37.08	D	11000	Disposed	2014-12-20	Common Stock (11000)	Direct
2013-05-01	Stock Options (Right to Buy)	$37.855	D	11000	Disposed	2015-12-19	Common Stock (11000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	8794.334	Indirect

Footnotes

F1: The unexpired 12/15/13 Stock Options are forfeited due to Mr. Hauck's retirement of service from the Registrant.

F2: The unexpired 12/20/14 Stock Options are forfeited due to Mr. Hauck's retirement of service from the Registrant.

F3: The unexpired 12/19/15 Stock Options are forfeited due to Mr. Hauck's retirement of service from the Registrant.