KEITHLEY INSTRUMENTS INC

FY: Sep 30 2010

FY: Sep 30 2010

Q: Jun 30 2010

Q: Mar 31 2010

Q: Dec 31 2009

FY: Sep 30 2009

Q: Jun 30 2009

Q: Mar 31 2009

Q: Dec 31 2008

FY: Sep 30 2008

Q: Jun 30 2008

Q: Mar 31 2008

Q: Dec 31 2007

FY: Sep 30 2007

Q: Jun 30 2007

Q: Mar 31 2007

Q: Dec 31 2006

FY: Sep 30 2006

FY: Sep 30 2006

Q: Jun 30 2006

2.01,3.01,3.03,5.01,5.02,9.01

Submission of Matters to a Vote of Security Holders

8.01

Results of Operations and Financial Condition

5.02,9.01

1.01,5.02,9.01

5.02,9.01

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Other Events

2.02,9.01

2.02

8.01,9.01

5.02,9.01

1.01,7.01,9.01

5.02,9.01

2.02,9.01

2.05,9.01

2.02,9.01

1.01

Certification of termination of registration of a class of securities (Section 12(b))

Notification of removal from listing and/or registration on a national securities exchange

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration of Securities on Exchange

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

No description available

No description available

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Faia Daniel A

GRISWOLD JAMES B

SAPONAS THOMAS A

SCHERER BARBARA VAUGHN

HOERSTEN MARK A

BACHMAN BRIAN R

PENDERGRASS LARRY L

JACKMAN BRIAN J

REDDY N MOHAN

GAMCO INVESTORS, INC. ET AL

DANAHER CORP /DE/

HENDRIX LEON J JR

PLUSH MARK J

DANAHER CORP /DE/; Aegean Acquisition Corp.

KEITHLEY JOSEPH P

KEITHLEY JOSEPH P

RAE LINDA C

GAMCO INVESTORS, INC. ET AL

HOERSTEN MARK A

PENDERGRASS LARRY L

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual Report Scanned (Paper)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)