SIERRA HEALTH SERVICES INC

Annual Report for period ending 2007-12-31

Notice under Rule 12b25 of inability to timely file all or part of a Form 10-K, 10-KSB, or 10-KT for period ending 2007-12-31

Quarterly Report for period ending 2007-09-30

Quarterly Report for period ending 2007-06-30

Annual Report for period ending 2006-12-31

Quarterly Report for period ending 2007-03-31

Annual Report for period ending 2006-12-31

Quarterly Report for period ending 2006-09-30

Quarterly Report for period ending 2006-06-30

Quarterly Report for period ending 2006-03-31

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Current report filing

Notice of termination of registration of a class of securities under Section 12(b)

Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities

A correspondence can be sent as a document with another submission type or can be sent as a separate submission.

A correspondence can be sent as a document with another submission type or can be sent as a separate submission.

A correspondence can be sent as a document with another submission type or can be sent as a separate submission.

Annual report of employee stock purchase, savings and similar plans

Annual report of employee stock purchase, savings and similar plans

Annual report of employee stock purchase, savings and similar plans

Annual report of employee stock purchase, savings and similar plans

Annual report to security holders

RENAISSANCE TECHNOLOGIES LLC: Major Shareholders

Briggs Marc R: Statement of changes in beneficial ownership of securities

BUNKER JONATHON W: Statement of changes in beneficial ownership of securities

COLLINS FRANK E: Statement of changes in beneficial ownership of securities

Giancursio Donald J: Statement of changes in beneficial ownership of securities

GREENE ALBERT L: Statement of changes in beneficial ownership of securities

HARTLEY THOMAS Y: Statement of changes in beneficial ownership of securities

LUCE MICHAEL E: Statement of changes in beneficial ownership of securities

MARLON ANTHONY M MD: Statement of changes in beneficial ownership of securities

RUTHE CHARLES L: Statement of changes in beneficial ownership of securities

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Post-effective amendment to a S-8 registration statement

Prospectus filed pursuant to Rule 424(b)(3)

Initial registration statement for securities to be offered to employees pursuant to employee benefit plans

Prospectus filed pursuant to Rule 424(b)(3)

Prospectus filed pursuant to Rule 424(b)(3)

Definitive additional proxy soliciting materials including Rule 14(a)(12) material. Note: Submission type DEFA14A can be filed as part of Form 8-K. For filers subject to 8-K filing requirements, we recommend the use of the 8-K combined form type as the easiest method for fulfilling your filing requirement for both forms.

Definitive proxy statement relating to a merger, acquisition, or disposition

Preliminary proxy statement relating to a merger, acquisition, or disposition

Definitive proxy statements

Definitive proxy statements

Definitive proxy statements

Definitive proxy statements

Definitive revised proxy soliciting materials

Definitive proxy statements

Definitive proxy statements