ABCO The Advisory Board Company (MM)

The Advisory Board Company 1997 Stock-Based Incentive Compensation Plan

The Advisory Board Company 2001 Stock-Based Incentive Compensation Plan

The Advisory Board Company Directors’ Stock Plan

The Advisory Board Company Employee Stock Purchase Plan

The Advisory Board Company 2005 Stock Incentive Plan

The Advisory Board Company 2006 Stock Incentive Plan

The Advisory Board Company 2009 Stock Incentive Plan

The Advisory Board Company Amended and Restated 2009 Stock Incentive Plan

The Advisory Board Company Inducement Stock Incentive Plan for Royall Employees

(Full title of the plans)

c/o UnitedHealth Group Incorporated

9900 Bren Road East

Minnetonka, MN 55343

(952) 936-1300

(Address, Including Zip Code, and Telephone Number, Including Area Code, of Registrant’s Principal Executive Offices)

Marianne D. Short

Executive Vice President and Chief Legal Officer

UnitedHealth Group Center

9900 Bren Road East

Minnetonka, Minnesota 55343

(952) 936-1300

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one).

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

DEREGISTRATION OF SECURITIES

This Post-Effective Amendment (this “Post-Effective Amendment”), deregisters all shares of The Advisory Board Company, a Delaware corporation (the “Registrant”) common stock, par value $0.01 per share (“Shares”), and any other securities remaining unissued under the following Registration Statements on Form S-8 (each, a “Registration Statement,” and collectively, the “Registration Statements”) filed by the Registrant with the U.S. Securities and Exchange Commission (the “Commission”):

Pursuant to the Agreement and Plan of Merger, dated as of August 28, 2017 (the “Merger Agreement”), by and among the Registrant, OptumInsight, Inc. (“Optum”), a wholly owned subsidiary of UnitedHealth Group Incorporated and Apollo Merger Sub, Inc., a wholly owned subsidiary of Optum, the Registrant became a wholly owned subsidiary of Optum effective November 17, 2017.

As a result of the completion of the transactions contemplated by the Merger Agreement, the Registrant has terminated any and all offerings of its securities pursuant to the Registration Statements. Accordingly, the Registrant hereby terminates the effectiveness of the Registration Statements and, in accordance with an undertakings made by the Registrant in Part II of the Registration Statements to remove from registration, by means of a post-effective amendment, any securities that had been registered for issuance but remain unsold at the termination of the offering, removes from registration any and all securities of the Registrant registered but unsold under the Registration Statements as of the date hereof.