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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   Mactas Mark Van 2. Date of Event Requiring Statement (Month/Day/Year) 01/04/2010 3. Issuer Name and Ticker or Trading Symbol Towers Watson & Co. [TW] (Last) (First) (Middle) 875 THIRD AVENUE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Deputy Chair, Pres, COO 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) NEW YORK, NY 10022 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B Common Stock	01/01/2011(1)	01/01/2014(1)	Class A Common Stock	305,464.156	$ 0 (1)	D	Â
Class F Common Stock	01/01/2013(2)	01/01/2013(2)	Class A Common Stock	798.79	$ 0 (2)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Mactas Mark Van 875 THIRD AVENUE NEW YORK, NY 10022	  X	Â	  Deputy Chair, Pres, COO	Â

Signatures

/s/Karl Chen, attorney-in-fact for Mr. Mactas		01/04/2010
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Consists of an equal number of shares of Class B common stock in subclasses B-1, B-2, B-3, and B-4, which, as a result of the closing under the Agreement and Plan of Merger (the Merger Agreement) entered into between (among others) Towers, Perrin, Forster & Crosby, Inc. and Watson Wyatt Worldwide, Inc., were issued by the Issuer. Subclasses B-1, B-2, B-3, and B-4 of the Issuer's Class B common stock will automatically convert to shares of Class A common stock of the Issuer on the first, second, third, and fourth anniversaries, respectively, of the effective time of the merger.
(2)	As a result of the closing under the Merger Agreement, non-transferable shares of Class F stock were issued by the Issuer. The Issuer's Class F stock represents only the contingent right to receive a pro rata portion of (a) a number of shares of the Issuer's Class A common stock equal to the number of shares of the Issuer's restricted Class A common stock, if any, forfeited by former Towers Perrin employees and (b) a number of shares of Class A common stock equal in value to the aggregate amount of cash dividends attributable to such forfeited shares. Shares of the Issuer's Class F stock will be automatically exchanged promptly following the third anniversary of the effective time of the merger for such a pro rata portion of shares of Class A common stock.

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