SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* SIMMONS HAROLD C (Last) (First) (Middle) 5430 LBJ FREEWAY, SUITE 1700 (Street) DALLAS TX 75240 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol KRONOS WORLDWIDE INC [ KRO ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner X Officer (give title below) Other (specify below) Chairman of the Board
	3. Date of Earliest Transaction (Month/Day/Year) 02/25/2013
	4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock $0.01 par value	02/25/2013		S		100,000	D	$17.25	782,840	D
Common Stock $0.01 par value	02/25/2013		J(1)		100,000	D	$17.25	787,876	I	by Spouse(2)
Common Stock $0.01 par value								57,990,042	I	by Valhi(3)
Common Stock $0.01 par value								35,219,270	I	by NL(4)
Common Stock $0.01 par value								5,372	I	by Contran(5)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Sale by the reporting person's spouse.

2. Directly held by the reporting person's spouse. The reporting person disclaims beneficial ownership of any shares of the issuer's common stock that his spouse holds.

3. Directly held by Valhi, Inc. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationship to the reporting person.

4. Directly held by NL Industries, Inc. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationship to the reporting person.

5. Directly held by Contran Corporation. See the Additional Information filed as Exhibit 99 to this statement for a description of the relationship to the reporting person.

Remarks:

Exhibit Index Exhibit 99 Additional Information

	A. Andrew R. Louis, Attorney-in-fact, for Harold C. Simmons	02/27/2013
	** 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 4 (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.

f4kro130227hcs

Exhibit 99

Additional Information



     The following persons directly hold the following percentages of the

outstanding shares of common stock of Kronos Worldwide, Inc. ("Kronos"):



Valhi........................................................50.0%

NL Industries, Inc. ("NL")...................................30.4%

Annette C. Simmons............................................0.7%

Harold C. Simmons.............................................0.7%

Contran Corporation ("Contran").....................less than 0.1%



 The following persons directly hold the following percentages of

the outstanding shares of common stock of the issuer, Valhi, Inc.

("Valhi"):



Valhi Holding Company ("VHC")................................92.6%

Harold Simmons Foundation, Inc. (the "Foundation")............0.7%

Harold C. Simmons.............................................0.5%

Contran Amended and Restated Deferred Compensation

  Trust ("CDCT")..............................................0.3%

Annette C. Simmons............................................0.2%

The Annette Simmons Grandchildren's Trust

  (the "Grandchildren's Trust").....................less than 0.1%

Contran.............................................less than 0.1%



     The following persons directly hold the following percentages of the

outstanding shares of common stock of NL:



Valhi........................................................83.0%

Harold C. Simmons.............................................2.2%

Annette C. Simmons............................................0.9%

Kronos..............................................less than 0.1%



     Dixie Rice Agricultural Corporation, Inc. ("Dixie Rice") is the

direct holder of 100% of the outstanding shares of common stock of VHC.

Contran is the holder of 100% of the outstanding shares of common stock

of Dixie Rice.



     Substantially all of Contran's outstanding voting stock is held by

trusts established for the benefit of certain children and grandchildren

of Harold C. Simmons (the "Trusts"), of which Mr. Simmons is the sole

trustee, or is held by Mr. Simmons or persons or other entities related

to Mr. Simmons.  As sole trustee of each of the Trusts, Mr. Simmons has

the power to vote and direct the disposition of the shares of Contran

stock held by each of the Trusts.  Mr. Simmons, however, disclaims

beneficial ownership of any shares of Contran stock that the Trusts hold.



     The Foundation is a tax-exempt foundation organized for charitable

purposes.  Harold C. Simmons is the chairman of the board of the

Foundation and may be deemed to control the Foundation.



     U.S. Bank National Association serves as the trustee of the CDCT.

Contran established the CDCT as an irrevocable "rabbi trust" to assist

Contran in meeting certain deferred compensation obligations that it owes

to Harold C. Simmons.  If the CDCT assets are insufficient to satisfy

such obligations, Contran is obligated to satisfy the balance of such

obligations as they come due.  Pursuant to the terms of the CDCT, Contran

(i) retains the power to vote the shares held directly by the CDCT,

(ii) retains dispositive power over such shares and (iii) may be deemed

the indirect beneficial owner of such shares.



     Mr. Harold C. Simmons is chairman of the board of Kronos, Valhi,

VHC, Dixie Rice and Contran, and chairman of the board and chief

executive officer of NL.



     By virtue of the offices held, the stock ownership and his services

as trustee, all as described above, (a) Mr. Simmons may be deemed to

control certain of such entities and (b) Mr. Simmons and certain of such

entities may be deemed to possess indirect beneficial ownership of, and a

pecuniary interest in, shares of common stock directly held by certain of

such other entities. However, Mr. Simmons disclaims such beneficial

ownership of, and such pecuniary interest in, such shares beneficially

owned, directly or indirectly, by any of such entities, except to the

extent of his vested beneficial interest, if any, in the shares the CDCT

holds directly.



     The reporting person understands that NL, a subsidiary of NL and

Kronos directly own 10,814,370 shares, 3,558,600 shares and 1,724,916

shares, respectively, of Valhi common stock as of the date of this

statement. As already stated, Valhi is the direct holder of approximately

83.0% of the outstanding shares of common stock of NL and 50.0% of the

outstanding shares of Kronos common stock.  As a result of Valhi's direct

and indirect ownership of NL, its subsidiary and Kronos, the reporting

person further understands that, pursuant to Delaware law, Valhi treats

the shares of Valhi common stock that NL, its subsidiary and Kronos own

as treasury stock for voting purposes. For the purposes of this

statement, such shares of Valhi common stock that NL, its

subsidiary and Kronos hold directly are not deemed outstanding.



     Annette C. Simmons is the wife of Harold C. Simmons.  Mr. Simmons

may be deemed to share indirect beneficial ownership of the shares that

his wife holds directly.  Mr. Simmons disclaims beneficial ownership of

all securities that his wife holds directly.  Mrs. Simmons disclaims

beneficial ownership of all shares she does not hold directly.



     The Grandchildren's Trust is a trust of which Harold C. Simmons and

his wife are trustees and the beneficiaries are the grandchildren of his

wife.  Mr. Simmons, as co-trustee of this trust, has the power to vote

and direct the disposition of the shares of Valhi common stock the trust

holds. Mr. Simmons disclaims beneficial ownership of any shares that this

trust holds.