SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Musslewhite Robert W

(Last)

(First)

(Middle)

2445 M STREET, NW

(Street)

WASHINGTON

20037

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
02/06/2007

3. Issuer Name and Ticker or Trading Symbol
ADVISORY BOARD CO [ ABCO ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Executive Vice President

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common stock, par value $0.01 per share	964	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Options to purchase common stock	12/30/2006	12/30/2013	Common stock, par value $0.01 per share	1,000	$34.44	D
Options to purchase common stock	12/30/2007	12/30/2013	Common stock, par value $0.01 per share	1,000	$34.44	D
Options to purchase common stock	⁽¹⁾	11/23/2014	Common stock, par value $0.01 per share	12,000	$35.06	D
Options to purchase common stock	⁽²⁾	03/04/2012	Common stock, par value $0.01 per share	6,000	$39.45	D
Options to purchase common stock	⁽²⁾	05/03/2012	Common stock, par value $0.01 per share	7,000	$40.5	D
Options to purchase common stock	⁽³⁾	03/09/2013	Common stock, par value $0.01 per share	16,100	$53.72	D
Restricted stock units	⁽⁴⁾	⁽⁵⁾	Common stock, par value $0.01 per share	2,300	⁽⁶⁾	D

Explanation of Responses:

1. Options vest 50% annually beginning February 15, 2007.

2. Options vest 50% annually beginning February 15, 2008.

3. Options vest annually in quarterly increments beginning March 9, 2007.

4. Restricted Stock Units vest equally in four increments in the following months: April 2007, March 2008, March 2009 and March 2010.

5. N/A.

6. Each Restricted Stock Unit represents a contingent right to receive one share of the Company's common stock.

Remarks:

	/s/ Robert W. Musslewhite by Thomas J. Aprahamian by Power-of-Attorney	02/16/2007
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.