<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>2
<FILENAME>f4nl070525hcs.txt
<TEXT>

Exhibit 99
Additional Information

     Valhi, Inc., Harold C. Simmons,  TIMET Finance Management Company ("TFMC"),
and Harold C. Simmons'  spouse are the direct  holders of  approximately  83.1%,
1.1%,  0.5% and  0.5%,  respectively,  of the  outstanding  common  stock of the
issuer, NL Industries, Inc. ("NL"). Titanium Metals Corporation ("TIMET") is the
sole stockholder of TFMC.

     Valhi Holding  Company  ("VHC"),  Annette C. Simmons,  The Combined  Master
Retirement Trust (the "CMRT"), Harold C. Simmons, NL Industries, Inc. ("NL"), NL
Environmental   Management  Services,   Inc.  ("NL  EMS"),  the  Harold  Simmons
Foundation  (the  "Foundation"),  the  Contran  Amended  and  Restated  Deferred
Compensation  Trust (the "CDCT"),  Valhi, Inc. ("Valhi") and The Annette Simmons
Grandchildren's  Trust  (the   "Grandchildren's   Trust")  are  the  holders  of
approximately  31.0%,  11.5%, 9.5%, 3.1%, 1.0%, 0.3%, 0.3%, 0.1%, less than 0.1%
and less than 0.1%,  respectively,  of the outstanding shares of common stock of
the issuer.  The  ownership of Ms.  Simmons  includes  20,824,200  shares of the
issuer's  common  stock  that she has the  right to  acquire  upon  exercise  of
1,561,815  shares of the issuer's 6 3/4% Series A Convertible  Preferred  Stock,
par value $0.01 per share (the  "Series A Preferred  Stock"),  that she directly
owns. The percentage  ownership of the issuer's common stock held by Ms. Simmons
assumes the full conversion of only the shares of Series A Preferred Stock owned
by her.

     Valhi is the sole member of Tremont. VHC, the Foundation,  the CDCT and the
CMRT are the direct holders of 92.1%, 0.9%, 0.4% and 0.1%, respectively,  of the
common stock of Valhi.  Valhi Group,  Inc.  ("VGI"),  National City Lines,  Inc.
("National")  and  Contran  Corporation  ("Contran")  are the direct  holders of
87.4%,  10.3% and 2.3%,  respectively,  of the outstanding  common stock of VHC.
National,  NOA, Inc. ("NOA") and Dixie Holding Company ("Dixie Holding") are the
direct holders of approximately  73.3%,  11.4% and 15.3%,  respectively,  of the
outstanding  common  stock of VGI.  Contran  and NOA are the  direct  holders of
approximately 85.7% and 14.3%, respectively,  of the outstanding common stock of
National.  Contran and Southwest Louisiana Land Company, Inc.  ("Southwest") are
the  direct  holders of  approximately  49.9% and  50.1%,  respectively,  of the
outstanding  common  stock of NOA.  Dixie Rice  Agricultural  Corporation,  Inc.
("Dixie Rice") is the direct holder of 100% of the  outstanding  common stock of
Dixie Holding.  Contran is the holder of 100% of the outstanding common stock of
Dixie Rice. Contran is also the holder of approximately 90.1% of the outstanding
common stock of Southwest.

     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 entities  related to Mr.  Simmons.  As sole trustee of
the Trusts,  Mr. Simmons has the power to vote and direct the disposition of the
shares of Contran  stock held by the Trusts.  Mr.  Simmons,  however,  disclaims
beneficial ownership of any shares of Contran stock that the Trusts hold.

     Harold C. Simmons is the chairman of the board and chief executive  officer
of the issuer and the  chairman of the board of each of Tremont,  TIMET,  Valhi,
VHC, VGI, National, NOA, Dixie Holding, Dixie Rice, Southwest and Contran.

     The Foundation  directly holds  approximately 0.3% of the oustanding shares
of TIMET  common  stock and 0.9% of the  outstanding  Valhi  common  stock.  The
Foundation is a tax-exempt foundation organized for charitable purposes.  Harold
C.  Simmons  is the  chairman  of the board and chief  executive  officer of the
Foundation and may be deemed to control the Foundation.

     The CDCT directly holds  approximately  0.1% of the  outstanding  shares of
TIMET common stock and 0.4% of the  outstanding  Valhi common  stock.  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 owed 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 of Valhi  common
stock held directly by the CDCT; (ii) retains dispositive power over such shares
and (iii) may be deemed the indirect beneficial owner of such shares.

     The CMRT directly holds  approximately  9.5% of the  outstanding  shares of
TIMET common  stock and 0.1% of the  outstanding  shares of Valhi common  stock.
Contran  sponsors the CMRT to permit the collective  investment by master trusts
that maintain the assets of certain  employee  benefit plans Contran and related
companies adopt.  Harold C. Simmons is the sole trustee of the CMRT and a member
of the trust  investment  committee for the CMRT.  Contran's  board of directors
selects the trustee and members of the trust investment  committee for the CMRT.
Mr. Simmons is a participant  in one or more of the employee  benefit plans that
invest through the CMRT. He disclaims beneficial ownership of any shares held by
the CMRT or the CDCT,  except to the extent of his individual  vested beneficial
interest, if any, in the assets held by the CMRT or the CDCT.

     By virtue of the  holding  of the  offices,  the  stock  ownership  and his
service as trustee,  all as described  above,  (a) Mr.  Simmons may be deemed to
control the  entities  described  above and (b) Mr.  Simmons and certain of such
entities may be deemed to possess indirect beneficial  ownership of shares of NL
common stock that Valhi and TFMC hold directly.  However,  Mr. Simmons disclaims
beneficial  ownership  of the  shares of NL  common  stock  beneficially  owned,
directly or indirectly, by any of such entities.

     NL and a  subsidiary  of NL directly  own  3,522,967  shares and  1,186,200
shares,  respectively,  of Valhi common stock.  Pursuant to Delaware law,  Valhi
treats the shares of Valhi  common  stock that NL and the  subsidiary  of NL own
directly  as treasury  stock for voting  purposes  and for the  purposes of this
statement are not deemed outstanding.

     Annette C.  Simmons is the wife of Harold C.  Simmons  and direct  owner of
256,575 of the issuer's common stock, 1,561,815 shares of the Series A Preferred
Stock, 126,475  shares of TIMET common  stock and 43,400  shares of Valhi common
stock. Mr. Simmons may be deemed to share indirect beneficial  ownership of such
securities.  Mr. Simmons disclaims  beneficial  ownership of all securities that
his spouse holds directly.

     Mr. Harold C. Simmons is the direct owner of 555,300 shares of the issuer's
common stock,  5,057,974  shares of TIMET common stock and 3,383 shares of Valhi
common stock.

     A trust of which Harold C. Simmons and his spouse are  co-trustees  and the
beneficiaries are the grandchildren of his spouse is the direct holder of 17,432
shares of TIMET  common  stock and  36,500  shares of Valhi  common  stock.  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 of Valhi  common stock that this
trust holds.
</TEXT>
</DOCUMENT>
