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* Weymouth Katharine (Last) (First) (Middle) 1150 15TH STREET NW (Street) WASHINGTON DC 20071 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 09/23/2010	3. Issuer Name and Ticker or Trading Symbol WASHINGTON POST CO [ WPO ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)	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)
Class B Common Stock	75	D
Class B Common Stock	2,625(1)	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)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (right to buy)	12/07/2006(2)	12/07/2016	Class B Common Stock	2,000	729.67	D
Employee Stock Option (right to buy)	12/15/2008(3)	12/15/2018	Class B Common Stock	2,000	368.56	D
Employee Stock Option (right to buy)	12/15/2009(4)	12/15/2019	Class B Common Stock	2,000	426.74	D

Explanation of Responses:

1. Class B shares awarded as restricted stock under incentive plan.

2. 2,000 shares of Class B Common Stock awarded on 12/07/2006 and vest at 500 per year over four years. 1,500 shares have vested; remaining 500 shares vest on 12/07/2010.

3. 2,000 shares of Class B Common Stock awarded on 12/15/2008 and vest at 500 shares per year over four years; 500 shares vested on 12/15/2009, 500 will vest on 12/15/2010, 500 will vest on 12/15/2011, and 500 will vest on 12/15/2012.

4. 2,000 shares of Class B Common Stock awarded 12/15/2009 and vest at 500 shares per year over four years; 500 will vest on 12/15/2010, 500 will vest on 12/15/2011, 500 will vest on 12/15/2012, and 500 will vest on 12/15/2013.

	Katharine Weymouth	10/01/2010
	** 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).
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