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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 26)*

CompX International Inc.

(Name of Issuer)

Class A Common Stock, par value $0.01 per share

(Title of Class of Securities)

20563P 10 1

(CUSIP Number)

Steven L. Watson

Three Lincoln Centre

Suite 1700

5430 LBJ Freeway

Dallas, Texas 75240-2694

(972) 233-1700

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

December 28, 2013

(Date of Event which requires Filing

of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. o

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

(Continued on following pages)

CUSIP No. 20563P 10 1

1	NAMES OF REPORTING PERSONS NL Industries, Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) WC and OO
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION New Jersey
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER -0-
		8	SHARED VOTING POWER 758,104
		9	SOLE DISPOSITIVE POWER -0-
		10	SHARED DISPOSITIVE POWER 758,104
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 758,104
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 31.6%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

1	NAMES OF REPORTING PERSONS Kronos Worldwide, Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) WC and OO
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER -0-
		8	SHARED VOTING POWER 758,104
		9	SOLE DISPOSITIVE POWER -0-
		10	SHARED DISPOSITIVE POWER 758,104
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 758,104
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 31.6%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1

1	NAMES OF REPORTING PERSONS Valhi, Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) WC and OO
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER -0-
		8	SHARED VOTING POWER 758,104
		9	SOLE DISPOSITIVE POWER -0-
		10	SHARED DISPOSITIVE POWER 758,104
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 758,104
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 31.6%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1

1	NAMES OF REPORTING PERSONS Valhi Holding Company
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) Not applicable
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER -0-
		8	SHARED VOTING POWER 758,104
		9	SOLE DISPOSITIVE POWER -0-
		10	SHARED DISPOSITIVE POWER 758,104
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 758,104
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 31.6%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1

1	NAMES OF REPORTING PERSONS Dixie Rice Agricultural Corporation, Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) Not applicable
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Louisiana
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER -0-
		8	SHARED VOTING POWER 758,104
		9	SOLE DISPOSITIVE POWER -0-
		10	SHARED DISPOSITIVE POWER 758,104
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 758,104
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 31.6%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1

1	NAMES OF REPORTING PERSONS Contran Corporation
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) WC and OO
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER -0-
		8	SHARED VOTING POWER 764,004
		9	SOLE DISPOSITIVE POWER -0-
		10	SHARED DISPOSITIVE POWER 764,004
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 764,004
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 31.9%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1

1	NAMES OF REPORTING PERSONS Harold Simmons Foundation, Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) Not applicable
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Texas
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER -0-
		8	SHARED VOTING POWER 758,104
		9	SOLE DISPOSITIVE POWER -0-
		10	SHARED DISPOSITIVE POWER 758,104
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 758,104
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 31.6%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 20563P 10 1

1	NAMES OF REPORTING PERSONS Lisa K. Simmons
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER -0-
		8	SHARED VOTING POWER 764,004
		9	SOLE DISPOSITIVE POWER -0-
		10	SHARED DISPOSITIVE POWER 764,004
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON -0-
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ý
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

CUSIP No. 20563P 10 1

1	NAMES OF REPORTING PERSONS Serena Simmons Connelly
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 2,000
		8	SHARED VOTING POWER 764,004
		9	SOLE DISPOSITIVE POWER 2,000
		10	SHARED DISPOSITIVE POWER 764,004
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,000
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ý
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.1%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

CUSIP No. 20563P 10 1

1	NAMES OF REPORTING PERSONS Annette C. Simmons
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (SEE INSTRUCTIONS) OO
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) o
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 421,639
		8	SHARED VOTING POWER 764,004
		9	SOLE DISPOSITIVE POWER 421,639
		10	SHARED DISPOSITIVE POWER 764,004
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 421,639
12	CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) ý
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 17.6%
14	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN

AMENDMENT NO. 26

TO SCHEDULE 13D

This amended statement on Schedule 13D (this “Statement”) relates to the class A common stock, par value $0.01 per share (the “Class A Shares”), of CompX International Inc., a Delaware corporation (“CompX”). Items 2, 4, 5 and 6 of this Statement are hereby amended as set forth below. The Reporting Persons (as defined below) are filing this amendment as a result of a change in control of CompX as a result of the death of Harold C. Simmons on December 28, 2013.

Item 2.

Identity and Background.

Item 2 is amended and supplemented as follows.

(a) The following entities or persons are filing this Statement (collectively, the “Reporting Persons”):

·	NL Industries, Inc. (“NL”) as a direct holder of Class A Shares;

Kronos Worldwide, Inc. (“Kronos Worldwide”), Valhi, Inc. (“Valhi”), Valhi Holding Company (“VHC”), Dixie Rice Agricultural Corporation, Inc. (“Dixie Rice”), Contran Corporation (“Contran”), and the Harold Simmons Foundation, Inc. (the “Foundation”) by virtue of their direct or indirect ownership of NL;

Lisa K. Simmons by virtue of her being a co-trustee of the Family Trusts (as defined and described below), her position as a member of the Contran board of directors (the “Contran Board”), a member, director and president of the Foundation and a party to the Voting Agreement (as defined and described below in this Statement);

·	Serena Simmons Connelly by virtue of being co-trustee of the Family Trusts, her position as a member of the Contran Board, a member, director and executive vice president of the Foundation and a party to the Voting Agreement (as defined and described below in this Statement); and

·	Annette C. Simmons by virtue of her position as a member of the Contran Board, her direct and indirect ownership of Class A Shares and a party to the Voting Agreement (as defined and described below in this Statement).

By signing this Statement, each Reporting Person agrees that this Statement is filed on its, her or his behalf.

The following is a description of the relationships among the Reporting Persons.

Lisa K. Simmons and Serena Simmons Connelly are daughters of Harold C. Simmons. Annette C. Simmons is the widow of Harold C. Simmons and serves as independent executor of his estate, has the power to vote and direct the disposition of the shares held by the estate and is the designated legatee of such shares.

Substantially all of Contran's outstanding voting stock is held by trusts established for the benefit of Lisa K. Simmons and Serena Simmons Connelly, daughters of Harold C. Simmons, and their children (the “Family Trusts”), for which Ms. Lisa Simmons and Ms. Connelly are co-trustees, or is held directly by Ms. Lisa Simmons and Ms. Connelly or persons or entities related to them, including their step-mother Annette C. Simmons, the widow of Harold C. Simmons. Ms. Annette C. Simmons, Ms. Lisa Simmons and Ms. Connelly also serve as members of the Contran Board. Prior to his death on December 28, 2013, Mr. Simmons served as sole trustee of the Family Trusts. As co-trustees of each of the Family Trusts, Ms. Lisa Simmons and Ms. Connelly have the shared power to vote and direct the disposition of the shares of Contran stock held by each of the Family Trusts, and Ms. Lisa Simmons and Ms. Connelly each have the power to vote and direct the disposition of shares of Contran stock they hold directly or which is held by other entities related to them.

Under a voting agreement (the “Voting Agreement”) entered into effective February 3, 2014 by the voting stockholders of Contran, the size of the Contran Board was initially fixed at five (5) members; Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons (and, in the event of their death, their heirs) each have the right to designate one of the five members of the Contran Board; and the remaining two members of the Contran Board must consist of Contran management. The Voting Agreement terminates in February 2017 (unless Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons otherwise mutually agree), and the ability of Ms. Lisa Simmons, Ms. Connelly, and Ms. Annette Simmons to each designate one member of the Contran Board is dependent upon each of their continued beneficial ownership of at least 5% of the combined voting stock of Contran. In accordance with such Voting Agreement, each of Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons have been designated as members of the Contran Board as of February 3, 2014, along with two members of Contran management.

The Foundation is a tax-exempt foundation organized for charitable purposes. Lisa K. Simmons and Serena Simmons Connelly are the sole members of the Foundation, serve as two of the three the directors on the Foundation’s board of directors and are the president and executive vice president, respectively of the Foundation. They may be deemed to control the Foundation but disclaim all Class A Shares they do not hold directly.

Annette C. Simmons is the sole trustee of a trust of which the beneficiaries are her grandchildren (the “Grandchildren’s Trust”), and she has the power to vote and direct the disposition of the shares the trust holds. She disclaims beneficial ownership of any shares that this trust holds.

A trust for which Ms. Annette Simmons is one of the co-trustees is the holder of 100% of the outstanding shares of non-voting preferred stock issued by VHC.

Contran is the holder of 100% of the outstanding common stock of Dixie Rice and may be deemed to control Dixie Rice. Dixie Rice is the direct holder of 100% of the outstanding common stock of VHC and may be deemed to control VHC.

Lisa K. Simmons, Serena Simmons Connelly and Annette C. Simmons are related to the following persons or entities that directly hold the following percentages of the 2,397,107 Class A Shares outstanding as of the close of business on February 5, 2014 based on information from CompX (the “Outstanding Class A Shares”):

NL	31.5	%
Annette C. Simmons as the independent executor of the estate of Harold C. Simmons and the designated legatee of his Class A Shares	15.1	%
Annette C. Simmons	2.5	%
Contran	0.2	%
Kronos Worldwide	0.1	%
Serena Simmons Connelly	0.1	%

NL also directly holds 100%, or 10,000,000 shares, of CompX’s class B common stock, par value $0.01 per share (the “Class B Shares” and collectively with the Class A Shares shall be referred to as the “Shares”). The relative rights of the Shares are described in Exhibit 3.1 to Amendment No. 1 to CompX’s Registration Statement on Form S-1 filed with the U.S. Securities and Exchange Commission (the “SEC”) on February 4, 1998 (Reg. No. 333-42643), which is incorporated herein by reference. As a result of its ownership of 31.5% of the Class A Shares and 100% of the Class B Shares, NL directly holds approximately 86.8% of the combined voting power (98.4% of the combined voting power for the election of directors) of all classes of voting stock of CompX. NL may be deemed to control CompX.

Lisa K. Simmons, Serena Simmons Connelly and Annette C. Simmons are related to the following persons or entities that directly hold the following percentages of the outstanding shares of NL common stock:

Valhi		83.0	%
Annette C. Simmons as the independent executor of the estate of Harold C. Simmons and the designated legatee of his shares of NL common stock		2.2	%
Annette C. Simmons		0.9	%
Kronos Worldwide	Less than 0.1%
Serena Simmons Connelly	Less than 0.1%

Together, Valhi and Kronos Worldwide may be deemed to control NL.

Valhi	50.0	%
NL	30.4	%
Annette C. Simmons	0.7	%
Annette C. Simmons as the independent executor of the estate of Harold C. Simmons and the designated legatee of his shares of Kronos Worldwide common stock	0.7	%
Contran	0.1	%

Together, Valhi, NL and Contran may be deemed to control Kronos Worldwide.

VHC		93.8	%
The Foundation		0.7	%
Annette C. Simmons as the independent executor of the estate of Harold C. Simmons and the designated legatee of his shares of Valhi common stock		0.6	%
Annette C. Simmons		0.2	%
The Grandchildren’s Trust	Less than 0.1%
Serena Simmons Connelly	Less than 0.1%

VHC may be deemed to control Valhi. Contran may be deemed to control VHC, by virtue of its ownership of Dixie Rice shares.

NL (including a wholly owned subsidiary of NL) and Kronos Worldwide own 14,372,970 shares and 1,724,916 shares, respectively, of Valhi common stock. As already stated, Valhi is the direct holder of approximately 83.0% of the outstanding shares of common stock of NL and 50.05% of the outstanding shares of Kronos Worldwide common stock. As a result of Valhi’s direct and indirect ownership of NL and Kronos Worldwide and pursuant to Delaware law and Section 13(d)(4) of the Exchange Act, Valhi treats the shares of Valhi common stock that NL and Kronos Worldwide own as treasury stock for voting purposes. For the purposes of this statement, such shares of Valhi common stock that NL and Kronos Worldwide hold are not deemed outstanding.

By virtue of the stock ownership of each of Kronos Worldwide, NL, Valhi, VHC, Dixie Rice and Contran, the role of Ms. Lisa Simmons and Ms. Connelly as co-trustees of the Family Trusts, Ms. Lisa Simmons and Ms. Connelly being beneficiaries of the Family Trusts, the direct holdings of Contran voting stock by each of Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons and entities related to them, the position as a member of the Contran Board by each of Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons, the position as a member of the board of the Foundation by each of Ms. Lisa Simmons and Ms. Connelly, and the rights of each of Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons under the Voting Agreement, in each case as described above, (a) Ms. Lisa Simmons and Ms. Connelly may be deemed to control each of the Family Trusts and the Foundation, (b) Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons may be deemed to control each of Contran, Dixie Rice, VHC, Valhi, NL, Kronos Worldwide and CompX and (c) Ms. Lisa Simmons, Ms. Connelly, Ms. Annette Simmons, Contran, the Foundation, Dixie Rice, VHC, Valhi, NL and Kronos Worldwide may be deemed to possess indirect beneficial ownership of, and a pecuniary interest in, shares of common stock directly held by such entities, including any Shares. However, Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons each disclaims 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 their direct beneficial ownership in shares of such entities.

Certain information concerning the directors and executive officers of the Reporting Persons, including offices held by Lisa K. Simmons and Serena Simmons Connelly in Contran and the Foundation and Annette C. Simmons as a member of the Contran Board, is set forth on Schedule B attached hereto and incorporated herein by reference.

(b) The principal offices of Kronos Worldwide, NL, Valhi, VHC and Contran and the Foundation are located at, and the business address of, Lisa K. Simmons, Serena Simmons Connelly and Annette C. Simmons is, Three Lincoln Centre, 5430 LBJ Freeway, Suite 1700, Dallas, Texas 75240-2697. The principal business address of Dixie Rice is 600 Pasquiere Street, Gueydan, Louisiana 70542. The business addresses of the remaining directors and executive officers of the Reporting Persons are set forth on Schedule B to this Statement and incorporated herein by reference.

In addition to the manufacturing of security products and recreational marine components engaged in through CompX and the holding of the securities described above as directly held by NL, NL is principally engaged through a subsidiary in reinsurance brokerage and risk management.

In addition to the activities engaged in through Kronos Worldwide and NL, Valhi is engaged through certain of its subsidiaries in real estate development and the waste management industry.

In addition to activities engaged in through Valhi and the other companies it may be deemed to control, as described above, VHC is principally engaged in holding the securities described above as directly held by VHC.

In addition to activities engaged in through VHC, Dixie Rice is principally engaged in land management, agriculture and oil and gas activities

In addition to the activities engaged in through Dixie Rice, VHC and Valhi, Contran is principally engaged in the rental and sales of compressors and related products, and in the production of steel rod, wire and wire products through a subsidiary.

The Foundation is a tax-exempt foundation organized for charitable purposes.

(d) None of the Reporting Persons or, to the best knowledge of such persons, any of the persons named in Schedule B to this Statement has been convicted in a criminal proceeding in the past five years (excluding traffic violations or similar misdemeanors).

(e) None of the Reporting Persons or, to the best knowledge of such persons, any person named in Schedule B to this Statement, was a party to a civil proceeding of a judicial or administrative body of competent jurisdiction as a result of which such person was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f) Kronos Worldwide, Valhi, VHC and Contran are Delaware corporations. NL is a New Jersey corporation. The Foundation is a Texas non-profit corporation. Dixie Rice is a Louisiana corporation. Except as noted in Schedule B, Lisa K. Simmons, Serena Simmons Connelly and Annette C. Simmons and all the persons named on Schedule B to this Statement are citizens of the United States.

Item 4.

Purpose of Transaction.

Item 4 is amended and supplemented as follows.

Depending upon their evaluation of CompX’s business and prospects, and upon future developments (including, but not limited to, performance of the Class A Shares in the market, availability of funds, alternative uses of funds, and money, stock market and general economic conditions), any of the Reporting Persons or other entities that may be deemed to be related to Contran may from time to time purchase Shares, and any of the Reporting Persons or other entities that may be deemed to be related to Contran may from time to time dispose of all or a portion of the Shares held by such person, or cease buying or selling Shares. Any such additional purchases or sales of Shares may be in open market or privately negotiated transactions or otherwise.

The information included in Item 2 of this Statement is hereby incorporated herein by reference. As described under Item 2 of this Statement, Lisa K. Simmons, Serna Simmons Connelly and Annette C. Simmons may be deemed to control CompX.

On the day of each annual stockholder meeting of CompX, each of its nonemployee directors elected on that date receives a grant of Class A Shares pursuant to a formula based on the closing price of a Class A Share on the date of the meeting. Accordingly, certain of the persons named in Schedule B to this Statement, namely, Norman S. Edelcup, Bobby D. O’Brien and Steven L. Watson are each entitled to receive such grants if and when he is re-elected at an annual meeting.

Except as described in this Item 4, none of the Reporting Persons nor, to the best knowledge of such persons, any other person named in Schedule B to this Statement has formulated any plans or proposals which relate to or would result in any matter required to be disclosed in response to paragraphs (a) through (j) of Item 4 of Schedule 13D.

Item 5.

Interest in Securities of the Issuer.

Item 5 is amended and supplemented as follows.

(a) The following entities or persons directly hold the following Shares:

Reporting Persons	Class A Shares Directly Held		Class B Shares Directly Held

NL		755,104		10,000,000
Annette C. Simmons as the independent executor of the estate of Harold C. Simmons and the designated legatee of his Class A Shares		361,217		-0-
Annette C. Simmons		60,422		-0-
Contran		5,900		-0-
Kronos Worldwide		3,000		-0-
Serena Simmons Connelly		2,000		-0-
Total		1,187,643		10,000,000

By virtue of the relationships described under Item 2 of this Statement:

(1) NL, Kronos Worldwide, Valhi, VHC, Dixie Rice and the Foundation may each be deemed to be the beneficial owner of the 758,104 Class A Shares (approximately 31.6% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 86.8% of the combined voting power, and 98.4% of the combined voting power for the election of directors, of all classes of voting stock of CompX) that NL and Kronos Worldwide hold directly;

(2) Contran and Lisa K. Simmons may be deemed to be the beneficial owner of the 764,004 Class A Shares (approximately 31.9% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 86.8% of the combined voting power, and 98.4% of the combined voting power for the election of directors, of all classes of voting stock of CompX) that NL, Contran and Kronos Worldwide hold directly;

(3) Serena Simmons Connelly may be deemed to be the beneficial owner of the 766,004 Class A Shares (approximately 32.0% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 86.8% of the combined voting power, and 98.4% of the combined voting power for the election of directors, of all classes of voting stock of CompX) that she, NL, Contran and Kronos Worldwide hold directly; and

(4) Annette C. Simmons may be deemed to be the beneficial owner of the 1,185,643 Class A Shares (approximately 49.5% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 90.2% of the combined voting power, and 98.8% of the combined voting power for the election of directors, of all classes of voting stock of CompX) that she, the estate of Harold C Simmons, NL, Contran and Kronos Worldwide hold directly.

Except for the 421,639 Class A Shares she and the estate of Harold C. Simmons hold directly, Annette C. Simmons disclaims beneficial ownership of all Shares. Except for the 2,000 Class A Shares she holds directly, Serena Simmons Connelly disclaims beneficial ownership of all Shares. Lisa K. Simmons disclaims beneficial ownership of all Shares.

The Reporting Persons understand, based on ownership filings with the SEC or upon information provided by the persons listed on Schedule B to this Statement, that such persons may be deemed to own beneficially the Class A Shares as indicated on Schedule C to this Statement.

(b) By virtue of the relationships described in Item 2 of this Statement:

(1) NL, Kronos Worldwide, Valhi, VHC, Dixie Rice and the Foundation may each be deemed to share the power to vote and direct the disposition of the 758,104 Class A Shares (approximately 31.6% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 86.8% of the combined voting power, and 98.4% of the combined voting power for the election of directors, of all classes of voting stock of CompX) that NL and Kronos Worldwide hold directly;

(2) Contran, Annette C. Simmons, Lisa K. Simmons and Serena Simmons Connelly may be deemed to share the power to vote and direct the disposition of the 764,004 Class A Shares (approximately 31.9% of the Outstanding Class A Shares) and 10,000,000 Class B Shares (approximately 86.8% of the combined voting power, and 98.4% of the combined voting power for the election of directors, of all classes of voting stock of CompX) that NL, Contran and Kronos Worldwide hold directly;

(3) Serena Simmons Connelly may be deemed to have the sole power to vote and direct the disposition of the 2,000 Class A Shares (approximately 0.1% of the Outstanding Class A Shares and approximately 0.0% of the combined voting power, and 0.0% of the combined voting power for the election of directors, of all classes of voting stock of CompX) that she directly holds; and

(4) Annette C. Simmons may be deemed to have the sole power to vote and direct the disposition of the 421,639 Class A Shares (approximately 17.6% of the Outstanding Class A Shares and approximately 3.4% of the combined voting power, and 0.4% of the combined voting power for the election of directors, of all classes of voting stock of CompX) that she and the estate of Harold C. Simmons directly hold.

(c) The Reporting Persons did not execute any transaction in the Shares since October 29, 2013 (60 days prior to the death of Harold C. Simmons). Since October 29, 2013:

(1) on the death of Harold C. Simmons on December 28, 2013, Lisa K. Simmons and Serena Simmons Connelly became co-trustees of the Family Trusts;

(2) on February 3, 2014, Annette C. Simmons became the independent executor of the Harold C. Simmons estate and is the legatee of his Shares that he held directly; and

(3) on February 3, 2014, Annette C. Simmons, Lisa K. Simmons and Serena Simmons Connelly became parties to the Voting Agreement.

(d) NL, the estate of Harold C. Simmons (of which Annette C. Simmons is the independent executor and the legatee of his Class A Shares), Annette C. Simmons, Contran, Kronos Worldwide and Serena Simmons Connelly, each has the right to receive and the power to direct the receipt of dividends from, and proceeds from the sale of, the Shares directly held by such entity or person.

(e) As a result of his death on December 28, 2013, Mr. Harold C. Simons ceased to be a beneficial owner of five percent of the Outstanding Class A Shares.

Item 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.

Item 6 is amended and supplemented as follows.

The estate of Harold C. Simmons holds 51,589 Class A Shares in a margin account with a broker.

The information included in Items 2, 4 and 5 of this Statement is hereby incorporated herein by reference.

Other than as set forth above, none of the Reporting Persons or, to the best knowledge of such persons, any person named in Schedule B to this Statement has any contract, arrangement, understanding or relationship (legal or otherwise) with any person with respect to securities of CompX, including, but not limited to, transfer or voting of any such securities, finder’s fees, joint ventures, loans or option arrangements, puts or calls, guarantees of profits, division of profits or losses, or the giving or withholding of proxies.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Statement is true, complete and correct.

Date: February 4, 2014

/s/ Annette C. Simmons

Annette C. Simmons

Signing in the capacities listed on Schedule “A”

attached hereto and incorporated herein by

reference.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Statement is true, complete and correct.

Date: February 5, 2014

/s/ Lisa K. Simmons

Lisa K. Simmons

Signing in the capacities listed on Schedule “A”

attached hereto and incorporated herein by

reference.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Statement is true, complete and correct.

Date: February 5, 2014

/s/ Serena Simmons Connelly

Serena Simmons Connelly, Signing in the

capacities listed on Schedule “A” attached

hereto and incorporated herein by reference.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Statement is true, complete and correct.

Date: February 5, 2014

/s/ Steven L. Watson

Steven L. Watson, Signing in the capacities

listed on Schedule “A” attached hereto and

incorporated herein by reference.

SCHEDULE A

ANNETTE C. SIMMONS, in her individual capacity, as independent executor of the ESTATE OF HAROLD C. SIMMONS and a party to the Voting Agreement.

LISA K. SIMMONS, as CO-TRUSTEE of the Family Trusts, president and a director of the HAROLD SIMMONS FOUNDATION, INC. and a party to the Voting Agreement.

SERENA SIMMONS CONNELLY, as CO-TRUSTEE of the Family Trusts, executive vice president and a director of the HAROLD SIMMONS FOUNDATION, INC. and a party to the Voting Agreement.

STEVEN L. WATSON, as vice chairman of the board, president, chief executive officer or vice president of each of:

CONTRAN CORPORATION

DIXIE RICE AGRICULTURAL CORPORATION, INC.

KRONOS WORLDWIDE, INC.

NL INDUSTRIES, INC.

VALHI HOLDING COMPANY

VALHI, INC.

SCHEDULE B

The names of the directors and executive officers of the Reporting Persons and their present principal occupations are set forth below. Except as otherwise indicated, each such person is a citizen of the United States of America and the business address of each such person is 5430 LBJ Freeway, Suite 1700, Dallas, Texas 75240.

Name	Present Principal Occupation

Thomas E. Barry (1)	Vice president for executive affairs at Southern Methodist University and professor of marketing in the Edwin L. Cox School of Business at Southern Methodist University; and a director of Valhi.

Brian W. Christian	Vice President, Strategic Business Development of Kronos Worldwide.

Benjamin R. Corona (2)	President. Global Sales Management of Kronos Worldwide.

Keith R. Coogan (3)	Private investor and director of Kronos Worldwide.

Serena S. Connelly	Director of Contran; executive vice president and director of the Foundation; and a party to the Voting Agreement.

Norman S. Edelcup (4)	Mayor of Sunny Isles Beach, Florida; director of CompX and Valhi; and trustee of the Baron Funds, a mutual fund group.

L. Andrew Fleck	Director and vice president of Dixie Rice; and vice president-real estate of Contran.

Robert D. Graham	President of NL, executive vice president of Kronos Worldwide and vice president of Contran, Dixie Rice, Valhi and VHC.

Tim C. Hafer	Vice president and controller of Kronos Worldwide and NL.

Janet G. Keckeisen	Vice president, corporate strategy and investor relations of Kronos Worldwide.

William J. Lindquist	Director and senior vice president of Contran and VHC; senior vice president of Dixie Rice and Valhi; and chief executive officer of Waste Control Specialists LLC, a subsidiary of Valhi.


A. Andrew R. Louis	Vice president and secretary of CompX, Dixie Rice, Kronos Worldwide, NL, Valhi and VHC; secretary of Contran; and vice president, general counsel and a director of the Foundation.

Kelly D. Luttmer	Vice president and global tax director of CompX, Contran, Dixie Rice, Kronos Worldwide, NL, VHC and Valhi.

H. Joseph Maas (2)	President, Global Sales and Marketing of Kronos Worldwide.

W. Hayden McIlroy (5)	Private investor primarily in real estate; and a director of Valhi.

Cecil H. Moore, Jr. (6)	Private investor; and a director of NL and Kronos Worldwide.

Andrew B. Nace	Vice president and general counsel of Contran and Valhi; and vice president of CompX, Kronos Worldwide and NL.

Bobby D. O’Brien	Executive vice president and director of CompX; president of Kronos Worldwide; executive vice president of NL; vice president and chief financial officer of Valhi; director, executive vice president and chief financial officer of Dixie Rice and VHC; and executive vice president and chief financial officer of Contran.

Courtney J. Riley	Vice president, environmental affairs of Kronos Worldwide and NL.

Klemens Schlüter (7)	President, Manufacturing and Technology of Kronos Worldwide.

Annette C. Simmons	Director of Contran; independent executor of the estate of Harold C. Simmons; and a party to the Voting Agreement.

Lisa K. Simmons	Director of Contran; director and president of the Foundation; and a party to the Voting Agreement.

Thomas P. Stafford (8)	Director of NL and Kronos Worldwide; chairman of the NASA Advisory Council Task Force on the International Space Station Program.


John A. St. Wrba	Vice president and treasurer of CompX, Contran, Dixie Rice, the Foundation, Kronos Worldwide, NL, Valhi and VHC.

Gregory M. Swalwell	Executive vice president of CompX, vice president and controller of Contran, Dixie Rice Valhi and VHC; and executive vice president and chief financial officer of Kronos Worldwide and NL.

R. Gerald Turner (1)	President of Southern Methodist University; and a director of Kronos Worldwide.

Steven L. Watson	Chairman of the board of CompX; vice chairman of the board and chief executive officer of NL and Kronos Worldwide; director, president and chief executive officer of Valhi; chairman of the board and president of Dixie Rice; and vice chairman of the board and president of Contran and VHC.

C. Kern Wildenthal (9)	President of the Children’s Medical Center Foundation and executive vice president of Children’s Medical Center of Dallas; and a director of Kronos Worldwide.

Terry N. Worrell (10)	Director of NL; and a private investor with Worrell Investments, Inc., a real estate investment company.

(1)	The principal business address for Drs. Barry and Turner is Southern Methodist University, Perkins Administration Bldg. #224, Dallas, Texas 75275.

(2)	The principal business address for Messrs. Corona and Maas is 5 Cedar Brook Drive, Cranbury, New Jersey 08512.

(3)	The principal address for Mr. Coogan is 5209 Englenook Court, Plano, Texas 75023.

(4)	The principal business address for Mr. Edelcup is 17395 North Bay Road, Suite 103, Sunny Isles Beach, Florida 33160.

(5)	The principal business address for Mr. McIlroy is 25 Highland Park Village, Suite 100-341, Dallas, Texas 75225.

(6)	The address for Mr. Moore is 4444 Beverly Drive, Dallas, Texas 75205.

(7)	The principal business address for Mr. Schlüter is Pechstraße 5, Leverkusen, NRW 51373, GERMANY.

(8)	The principal business address for Gen. Stafford (ret.) is Stafford Technology Inc., Suite 102, 4200 Perimeter Center, Oklahoma City, Oklahoma 73112.

(9)	The address for Dr. Wildenthal is 2777 Stemmons Expressway, Suite 700 Dallas TX 75207.

(10)	The address for Mr. Worrell is 6909 Vassar, Dallas, Texas 75205.

SCHEDULE C

Based upon ownership filings with the Commission or upon information provided by the persons listed on Schedule B to this Statement, such persons may be deemed to personally beneficially own Class A Shares, as outlined below:

Name	Class A Shares Held

Thomas E. Barry	-0-

Brian W. Christian	-0-

Benjamin R. Corona	-0-

Keith R. Coogan	-0-

Serena S. Connelly	2,000	(1)

Norman S. Edelcup	11,000

L. Andrew Fleck	-0-

Robert D. Graham	-0-

Tim C. Hafer	-0-

Janet G. Keckeisen	-0-

William J. Lindquist	-0-

A. Andrew R. Louis	-0-

Kelly D. Luttmer	200

H. Joseph Maas.	-0-

W. Hayden McIlroy	-0-

Cecil H. Moore, Jr.	-0-

Andrew B. Nace	-0-

Bobby D. O’Brien	300

Courtney J. Riley	-0-

Klemens Schlüter	-0-

Name	Class A Shares Held

Annette C. Simmons	-0-	(2)

Lisa K. Simmons	-0-	(3)

Thomas P. Stafford	-0-

John A. St. Wrba	-0-

Gregory M. Swalwell	-0-

R. Gerald Turner.	-0-

Steven L. Watson	15,000

C. Kern Wildenthal	-0-

Terry N. Worrell	-0-

(1)	Does not include other Shares of which Ms. Connelly may be deemed to possess indirect beneficial ownership as described in Items 2 and 5(a) of this Statement. Except for the 2,000 Class A Shares that she holds directly, Ms. Connelly disclaims beneficial ownership of all Shares.

(2)

Includes 361,217 Class A Shares held directly by the estate of Harold C. Simmons of which Annette C. Simmons is the independent executor and the designated legatee of these Class A Shares. Does not include other Shares of which Ms. Annette Simmons may be deemed to possess indirect beneficial ownership as described in Items 2 and 5(a) of this Statement. Except for the 60,422 Class A Shares that she holds directly, Ms. Simmons disclaims beneficial ownership of all Shares.

(3)	Does not include Shares of which Ms. Lisa Simmons may be deemed to possess indirect beneficial ownership as described in Items 2 and 5(a) of this Statement. Ms. Simmons disclaims beneficial ownership of all Shares.