UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported):

July 28, 2009

Keithley Instruments, Inc.
(Exact name of registrant as specified in its charter)

Ohio

1-9965

34-0794417

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(I.R.S. Employer

Identification No.)

28775 Aurora Road, Solon, Ohio		44139
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code:

(440) 248-0400

Not Applicable
________________________________________________
Former name or former address, if changed since last report

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

⃞ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

⃞ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

⃞ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

⃞ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

(a) On July 28, 2009 Keithley Instruments, Inc. issued a press release reporting its financial results for its third quarter of fiscal year 2009, which ended June 30, 2009. A copy of the release is attached as Exhibit 99.

The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing of the Registrant, whether made before or after the date hereof. The information in this report, including the exhibit hereto, shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	Keithley Instruments, Inc.

July 28, 2009	By:	/s/ Mark J. Plush
		Name:	Mark J. Plush
		Title:	Vice President and Chief Financial Officer


	Exhibit No.		Description

	99		Press Release Dated July 28, 2009