OMB APPROVAL

hours per response ........... 2.00

SEC USE ONLY

DOCUMENT SEQUENCE NO.

CUSIP NUMBER

ATTENTION:

Transmit for filing 3 copies of this form concurrently with either placing an order with a broker to execute sale or executing a sale directly with a market maker.

WORK LOCATION

1 (a) NAME OF ISSUER (Please type or print)

(b) IRS IDENT. NO.

(c) S.E.C.FILE NO.

S&T Bancorp, Inc.

25-1434426

0-12508

1 (d) ADDRESS OF ISSUER

STREET

CITY

STATE

ZIP CODE

(e) TELEPHONE NO.

800 Philadelphia Street

Indiana

PA

15701

AREA CODE

NUMBER

800

325-2265

2 (a) NAME OF PERSON FOR WHOSE ACCOUNT THE SECURITIES ARE TO BE SOLD

(b) IRS IDENT. NO.

(C) RELATIONSHIP TO ISSUER

(d)ADDRESS

STREET

CITY

STATE

ZIP CODE

Tony E. Kallsen

Executive Vice President

P.O. Box 190

Indiana

PA

15701

INSTRUCTION: The person filing this notice should contact the issuer to obtain the IRS. Identification Number and the S.E.C. File Number.

3 (a)

(b)

SEC USE ONLY

(c)

(d)

(e)

(f)

(g)

Title of the
Class of
Securities
To Be Sold

Name and Address of Each Broker Through Whom
the Securities are to be Offered or Each Market
Maker who is Acquiring the Securities

Broker-Dealer
File Number

Number of Shares
or Other Units
To Be Sold

(See instr. 3©)

Aggregate
Market
Value

(See instr. 3(d))

Number of Shares
or Other Units
Outstanding

(See Instr. 3(e))

Approximate
Date of Sale

(See instr. 3(f))
(MO. DAY YR)

Name of Each
Securities
Exchange

(See instr. 3(g))

Common

San Antonio, TX 78232

800

14,880

27,654,530

10 Days

Nasdaq

INSTRUCTIONS:
1. (a) Name of issuer
(b) Issuer's I.R.S. Identification Number
(c) Issuer's S.E.C. file number, if any
(d) Issuer's address, including zip code
(e) Issuer's telephone number, including area code

2. (a) Name of person for whose account the securities are to be sold
(b) Such person's Social Security or I.R.S. identification number
(c) Such person's relationship to the issuer (e.g., officer, director, 10%
stockholder, or member of immediate family of any of the foregoing)
(d) Such person's address, including zip code

TABLE I - SECURITIES TO BE SOLD
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:

Title of
the Class

Date You
Acquired

Nature of Acquisition Transaction

Name of Person from Whom Acquired
(if gift, also give date donor acquired)

Amount of
Securities Acquired

Date of
Payment

Nature of Payment

Common

Purchases over time

401-K

S&T Bancorp, Inc.

800

Purchases over time

Salary Deferral

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

TABLE II - SECURITIES SOLD DURING THE PAST 3 MONTHS
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.

Name and Address of Seller

Title of Securities Sold

Date of Sale

Amount of
Securities Sold

Gross Proceeds

Indiana, PA 15701

S&T Bancorp, Inc.

02/25/09

195

4,337

INSTRUCTIONS:
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as in 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 (c) of Rule 144 to be aggregated with sales for the account of the person filing
this notice.

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.

05/01/09

for Tony E. Kallsen

DATE OF NOTICE

(SIGNATURE)

The notice shall be signed by the person for whose account the securities are to be sold. At least one copy of the notice shall be manually signed.
Any copies not manually signed shall bear typed or printed signatures.

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001).