CATALYST HEALTH SOLUTIONS, INC.

Q: Mar 31 2012

FY: Dec 31 2011

FY: Dec 31 2011

Q: Sep 30 2011

Q: Jun 30 2011

Q: Mar 31 2011

FY: Dec 31 2010

Q: Sep 30 2010

Q: Jun 30 2010

Q: Mar 31 2010

FY: Dec 31 2009

Q: Sep 30 2009

Q: Jun 30 2009

Q: Mar 31 2009

FY: Dec 31 2008

Q: Sep 30 2008

Q: Jun 30 2008

Q: Mar 31 2008

FY: Dec 31 2007

Q: Sep 30 2007

1.02,2.01,3.01,3.03,5.01,5.02,5.03,5.07,9.01

8.01,9.01

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Other Events

8.01

8.01

8.01

8.01,9.01

7.01,9.01

8.01

2.02,9.01

8.01,9.01

8.01,9.01

1.01,9.01

7.01,8.01,9.01

7.01,9.01

Results of Operations and Financial Condition

Regulation FD Disclosure

5.02

8.01

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

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

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

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

BATES RICHARD A

WOLF DALE B

SAMET KENNETH A

Preston Benjamin R

PEARSON TIMOTHY R

MCDONNELL MICHAEL R

EPSTEIN STEVEN B

BROCK WILLIAM E

BLAIR DAVID T

WOLF DALE B

SAMET KENNETH A

MCDONNELL MICHAEL R

EPSTEIN STEVEN B

BROCK WILLIAM E

Preston Benjamin R

BLAIR DAVID T

PRINCIPAL FINANCIAL GROUP INC

BLAIR DAVID T

Preston Benjamin R

METGE BRUCE F

Annual Report Scanned (Paper)

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)

Annual Report Scanned (Paper)