content: <!-- CoverPageHeader start -->
  <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
  <HTML>
  <HEAD>
  <TITLE> Keithley Instruments, Inc. (Form: 8-K) </TITLE>
  </HEAD>
  <BODY TEXT="#000000" BGCOLOR="#FFFFFF" ALINK="#0000FF" HLINK="#FF0000" VLINK="#800080">
  <A NAME="DOCUMENT_TOP">&nbsp;</A>
  <P>
  <!-- CoverPageHeader end --><!-- CoverPageTitle START -->
  <A NAME="DOCUMENT_TOP">&nbsp;</A>
  <HR NOSHADE>
  <P>
  <P ALIGN="CENTER">
  <FONT SIZE="4">
  		UNITED STATES<BR>
  	SECURITIES AND EXCHANGE COMMISSION
  </FONT>
  <BR>
  <FONT SIZE="2">
  	WASHINGTON, D.C. 20549
  </FONT>
  <P ALIGN="CENTER">
  <FONT SIZE="5">
  	FORM 8-K
  </FONT>
  <FONT SIZE="2">
  
  </FONT>
  </P>
  <P ALIGN="CENTER">
  <FONT SIZE="3">
  	CURRENT REPORT
  </FONT>
  </P>
  <P ALIGN="CENTER">
  <FONT SIZE="2">
  	Pursuant to Section&nbsp;13 or 15(d) of the Securities Exchange Act of 1934
  </FONT>
  </P>
  <CENTER>
  <TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
  <TR VALIGN="BOTTOM">
  <TD WIDTH="51%">
  	&nbsp;
  </TD>
  <TD WIDTH="5%">
  	&nbsp;
  </TD>
  <TD WIDTH="44%">
  	&nbsp;
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	Date of Report (Date of Earliest Event Reported):
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	December 29, 2006
  </FONT>
  </TD>
  </TR>
  </TABLE>
  <BR>
  </CENTER>
  <!-- CoverPageTitle END --><!-- CoverPageRegistrant START -->
  <P ALIGN="CENTER"><!-- -->
  <FONT SIZE="6">
  	Keithley Instruments, Inc.
  </FONT>
  <FONT SIZE="2">
  <BR>__________________________________________<BR>
  	(Exact name of registrant as specified in its charter)
  </FONT>
  <CENTER>
  <TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
  <TR VALIGN="BOTTOM">
  <TD WIDTH="33%">
  	&nbsp;
  </TD>
  <TD WIDTH="34%">
  	&nbsp;
  </TD>
  <TD WIDTH="33%">
  	&nbsp;
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	Ohio
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	1-9965
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	34-0794417
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  _____________________<BR>
  	(State or other jurisdiction
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  _____________<BR>
  	(Commission
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  ______________<BR>
  	(I.R.S. Employer
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	of incorporation)
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	File Number)
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	Identification No.)
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	28775 Aurora Road, Solon, Ohio
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	44139
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  _________________________________<BR>
  	(Address of principal executive offices)
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  ___________<BR>
  	(Zip Code)
  </FONT>
  </TD>
  </TR>
  </TABLE>
  </CENTER>
  <CENTER>
  <TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
  
  <TR VALIGN="BOTTOM">
  <TD WIDTH="51%">
  	&nbsp;
  </TD>
  <TD WIDTH="5%">
  	&nbsp;
  </TD>
  <TD WIDTH="44%">
  	&nbsp;
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	Registrant&#146;s telephone number, including area code:
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="CENTER" VALIGN="TOP">
  <FONT SIZE="2">
  	(440) 248-0400
  </FONT>
  </TD>
  </TR>
  </TABLE>
  </CENTER>
  <P ALIGN="CENTER">
  <FONT SIZE="2">
  	Not Applicable
  <BR>______________________________________________<BR>
  	Former name or former address, if changed since last report
  </FONT>
  <P ALIGN="CENTER">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  <!-- CoverPageRegistrant END --><P><FONT SIZE="2">
  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:</FONT>
  </P>
  <P><FONT SIZE="2">
  [&nbsp;&nbsp;]&nbsp;&nbsp;Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<br>
  [&nbsp;&nbsp;]&nbsp;&nbsp;Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)<br>
  [&nbsp;&nbsp;]&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))<br>
  [&nbsp;&nbsp;]&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))<br>
  </P></FONT><!-- PageBreak START -->
  <P>
  <HR NOSHADE>
  <DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
  <A HREF="#DOCUMENT_TOP">
  <U>
  <B>
  <FONT SIZE="2">Top of the Form</FONT>
  </B>
  </U>
  </A>
  </DIV>
  <!-- PageBreak END --><!-- Item START -->
  <P ALIGN="LEFT">
  <FONT SIZE="2">
  <B>
  	Item 2.02 Results of Operations and Financial Condition.
  </B>
  </FONT>
  </P>
  <P ALIGN="LEFT">
  <FONT SIZE="2">
  On December 29, 2006, Keithley Instruments Inc. issued a press release reporting its financial results for the fourth quarter and fiscal year 2006, which ended September 30, 2006. A copy of the release is attached as Exhibit 99.1.
  </FONT>
  </P>
  <!-- Item END -->
  <BR><BR><BR><BR><!-- Item START -->
  <P ALIGN="LEFT">
  <FONT SIZE="2">
  <B>
  	Item 7.01 Regulation FD Disclosure.
  </B>
  </FONT>
  </P>
  <P ALIGN="LEFT">
  <FONT SIZE="2">
  The Company also issued a press release on December 29, 2006 reporting the findings of the Special Committee of its Board of Directors. A copy of the release is attached as Exhibit 99.2.
  </FONT>
  </P>
  <!-- Item END -->
  <BR><BR><BR><BR><!-- Item START -->
  <P ALIGN="LEFT">
  <FONT SIZE="2">
  <B>
  	Item 9.01 Financial Statements and Exhibits.
  </B>
  </FONT>
  </P>
  <P ALIGN="LEFT">
  <FONT SIZE="2">
  Exhibits.<br>99.1 Earnings release dated December 29, 2006<br>99.2 Press release dated December 29, 2006 reporting results of Special Committee of Keithley Instruments, Inc. Board of Directors
  </FONT>
  </P>
  <!-- Item END -->
  <BR><BR><BR><BR><P ALIGN="LEFT" STYLE="FONT-SIZE: 10PT">The information contained herein and in the accompanying exhibits 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 exhibits 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 of Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended.</P><!-- PageBreak START -->
  <P>
  <HR NOSHADE>
  <DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
  <A HREF="#DOCUMENT_TOP">
  <U>
  <B>
  <FONT SIZE="2">Top of the Form</FONT>
  </B>
  </U>
  </A>
  </DIV>
  <!-- PageBreak END --><!-- SignatureHeader START -->
  <P ALIGN="CENTER">
  <FONT SIZE="2">
  <B>
  	SIGNATURES
  </B>
  </FONT>
  </P>
  <P ALIGN="LEFT">
  <FONT SIZE="2">
  	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.
  </FONT>
  </P>
  <!-- SignatureHeader END --><!-- Signature START -->
  <CENTER>
  <TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
  <TR VALIGN="BOTTOM">
  <TD WIDTH="19%">
  	&nbsp;
  </TD>
  <TD WIDTH="34%">
  	&nbsp;
  </TD>
  <TD WIDTH="3%">
  	&nbsp;
  </TD>
  <TD WIDTH="1%">
  	&nbsp;
  </TD>
  <TD WIDTH="43%">
  	&nbsp;
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD COLSPAN="3" VALIGN="TOP" ALIGN="LEFT">
  <FONT SIZE="2">
  	Keithley Instruments, Inc.
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;&nbsp;
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD VALIGN="TOP">
  <FONT SIZE="2">
  <I>
  	December 29, 2006
  </I>
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <FONT SIZE="2">
  <I>
  	By:
  </I>
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <FONT SIZE="2">
  <I>
  	Mark J. Plush
  </I>
  <BR>
  </FONT>
  </TD>
  </TR>
  <TR>
  <TD VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <HR SIZE="1" NOSHADE>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <FONT SIZE="2">
  <I>
  	Name: Mark J. Plush
  </I>
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP">
  <FONT SIZE="2">
  <I>
  	Title: Vice President and Chief Financial Officer
  </I>
  </FONT>
  </TD>
  </TR>
  </TABLE>
  </CENTER>
  <!-- Signature END --><!-- PageBreak START -->
  <P>
  <HR NOSHADE>
  <DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
  <A HREF="#DOCUMENT_TOP">
  <U>
  <B>
  <FONT SIZE="2">Top of the Form</FONT>
  </B>
  </U>
  </A>
  </DIV>
  <!-- PageBreak END --><P ALIGN="CENTER">
  <FONT SIZE="2">
  	Exhibit&nbsp;Index
  </FONT>
  <CENTER>
  <TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="60%">
  <TR VALIGN="BOTTOM">
  <TD WIDTH="8%">
  	&nbsp;
  </TD>
  <TD WIDTH="15%">
  	&nbsp;
  </TD>
  <TD WIDTH="77%">
  	&nbsp;
  </TD>
  </TR>
  
  <BR>
  <TR VALIGN="BOTTOM">
  <TD NOWRAP ALIGN="LEFT">
  <FONT SIZE="1">
  <B>
  	Exhibit No.
  </B>
  </FONT>
  </TD>
  <TD>
  <FONT SIZE="1">
  	&nbsp;
  </FONT>
  </TD>
  <TD NOWRAP ALIGN="LEFT">
  <FONT SIZE="1">
  <B>
  	Description
  </B>
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD NOWRAP ALIGN="CENTER">
  <HR SIZE="1" NOSHADE>
  </TD>
  <TD>
  <FONT SIZE="1">
  	&nbsp;
  </FONT>
  </TD>
  <TD NOWRAP ALIGN="CENTER">
  <HR ALIGN="LEFT" SIZE="1" WIDTH="88%" NOSHADE>
  </TD>
  </TR>
  
  
  
  
  
  <TR VALIGN="BOTTOM">
  <TD VALIGN="TOP" WIDTH="8%" nowrap>
  <FONT SIZE="2">
  <DIV ALIGN="LEFT">
  	99.1
  </DIV>
  </FONT>
  </TD>
  <TD WIDTH="15%">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP" WIDTH="77%">
  <FONT SIZE="2">
  Earnings press release dated December 29, 2006
  </FONT>
  </TD>
  </TR>
  <TR VALIGN="BOTTOM">
  <TD VALIGN="TOP" WIDTH="8%" nowrap>
  <FONT SIZE="2">
  <DIV ALIGN="LEFT">
  	99.2
  </DIV>
  </FONT>
  </TD>
  <TD WIDTH="15%">
  <FONT SIZE="2">
  	&nbsp;
  </FONT>
  </TD>
  <TD ALIGN="LEFT" VALIGN="TOP" WIDTH="77%">
  <FONT SIZE="2">
  Press release dated December 29, 2006 reporting results of Special Committee of Keithley Instruments, Inc. Board of Directors
  </FONT>
  </TD>
  </TR></TABLE></CENTER><!-- HTMLFooter START -->
  </BODY>
  </HTML>
  <!-- HTMLFooter END -->
metadata_documents: [{"type": "8-K", "sequence": "1", "filename": "htm_17311.htm", "description": "LIVE FILING", "secsgml_size_bytes": 11322}]
metadata_filer: {"company-data": {"conformed-name": "KEITHLEY INSTRUMENTS INC", "cik": "0000054991", "assigned-sic": "3825", "irs-number": "340794417", "state-of-incorporation": "OH", "fiscal-year-end": "0930"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-09965", "film-number": "061304860"}, "business-address": {"street1": "28775 AURORA RD", "city": "SOLON", "state": "OH", "zip": "44139", "phone": "2162480400"}}
text: Keithley Instruments, Inc. (Form: 8-K)
  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):
  December 29, 2006
  Keithley Instruments, Inc.
  __________________________________________
  (Exact name of registrant as specified in its charter)
  Ohio
  1-9965
  34-0794417
  _____________________
  (State or other jurisdiction
  _____________
  (Commission
  ______________
  (I.R.S. Employer
  of incorporation)
  File Number)
  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))
  Top of the Form
  Item 2.02 Results of Operations and Financial Condition.
  On December 29, 2006, Keithley Instruments Inc. issued a press release reporting its financial results for the fourth quarter and fiscal year 2006, which ended September 30, 2006. A copy of the release is attached as Exhibit 99.1.
  Item 7.01 Regulation FD Disclosure.
  The Company also issued a press release on December 29, 2006 reporting the findings of the Special Committee of its Board of Directors. A copy of the release is attached as Exhibit 99.2.
  Item 9.01 Financial Statements and Exhibits.
  Exhibits.
  99.1 Earnings release dated December 29, 2006
  99.2 Press release dated December 29, 2006 reporting results of Special Committee of Keithley Instruments, Inc. Board of Directors
  The information contained herein and in the accompanying exhibits 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 exhibits 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 of Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended.
  Top of the Form
  SIGNATURES
  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.
  December 29, 2006
  By:
  Mark J. Plush
  Name: Mark J. Plush
  Title: Vice President and Chief Financial Officer
  Top of the Form
  Exhibit Index
  Exhibit No.
  Description
  99.1
  Earnings press release dated December 29, 2006
  99.2
  Press release dated December 29, 2006 reporting results of Special Committee of Keithley Instruments, Inc. Board of Directors