1. Name and Address of Reporting Person
Ruck, Walter K.
Benson Road
Middlebury, CT 06749
USA
2. Issuer Name and Ticker or Trading Symbol
Crompton Corporation
3. IRS or Social Security Number of Reporting Person (Voluntary)
4. Statement for Month/Day/Year
01/21/2003
5. If Amendment, Date of Original (Month/Day/Year)
6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
( ) Director ( ) 10% Owner
(X) Officer (give title below) ( ) Other (specify below)
Senior V.P. - Operations
7. 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 |2. Trans- |2A.Execu- |3. Trans-|4. Securities Acquired (A)|5. Amount of |6. Owner- |7. Nature |
| | action | action | action| or Disposed of (D) |Securities | ship | of In- |
| | Date | Date | Code | |Beneficially | Form: | direct |
| | | | | |Owned | Direct | Bene- |
| | (Month/ | (Month/ | | |Following | (D) or | ficial |
| | Day/ | Day/ +-----+---+-----------+---+----------+Reported | Indirect| Owner- |
| | Year) | Year) |Code |V |Amount |A/D|Price |Transaction(s)| (I) | ship |
+------------------------------+----------+----------+-----+---+-----------+---+----------+--------------+-----------+------------+
Common Stock 46877 D
Common Stock 5641.459 I ESOP TRUST
TABLE II -- Derivative Securities Acquired, Disposed of, or Beneficially Owned
+----------+--------+-------+-------+---------+-----------+---------------------+----------------+----------+-------+-------+------+
|1. |2. |3. |3A. |4. |5. |6. |7. |8. |9. |10. |11. |
| | | | | | | | | |Number |Owner- | |
| | | | | | | | | |of |ship | |
| | | | | | | | | |Deriv- |Form of| |
| | | | | | | |Title and Amount| |ative |Deriv- | |
| | | | | | | |of Underlying | |Secur- |ative |Nature|
| |Conver- |Trans- |Execu- | |Number of | |Securities | |ities |Secur- |of |
| |sion or |action |tion | |Derivative |Date Exercisable +-------+--------+ |Benefi-|ity: |In- |
| |Exercise|Date |Date | |Securities |and Expiration Date | |Amount | |cially |Direct |direct|
| |Price of| | |Transac- |Acquired(A)|(Month/Day/Year) | |or | |Owned |(D) or |Bene- |
|Title of |Deriv- |(Month/|(Month/|tion Code|Disposed(D)+----------+----------+ |Number |Price of | |In- |ficial|
|Derivative|ative | Day/ | Day/ +------+--+-----+-----+Date Exer-|Expira- | |of |Derivative| |direct |Owner-|
|Security |Security|Year) |Year) |Code |V |(A) |(D) |cisable |tion Date |Title |Shares |Security | |(I) |ship |
+----------+--------+-------+-------+------+--+-----+-----+----------+----------+-------+--------+----------+-------+-------+------+
NQ Stock $6.38 01/21/2 A 10690 01/21/2004 02/20/2013 Common 10690 $0.0000 10690 D
Option 003 Stock
(Right to
Buy)
NQ Stock $7.25 11/21/2012 Common 9863 D
Option Stock
(Right to
Buy)
NQ Stock $7.92 11/22/2011 Common 12500 D
Option Stock
(Right to
Buy)
NQ Stock $8.1562 11/30/2010 Common 30000 D
Option Stock
(Right to
Buy)
NQ Stock $8.343 11/19/2009 Common 81244 D
Option Stock
(Right to
Buy)
NQ Stock $14.3438 11/14/2008 Common 26062 D
Option Stock
(Right to
Buy)
NQ Stock $26.4063 11/07/2007 Common 10722 D
Option Stock
(Right to
Buy)
ISO Stock $6.38 01/21/2 A 34310 01/21/2004 01/21/2013 Common 34310 $0.0000 34310 D
Option 003 Stock
(Right to
Buy)
ISO Stock $7.25 10/22/2012 Common 10137 D
Option Stock
(Right to
Buy)
ISO Stock $7.92 10/23/2011 Common 12500 D
Option Stock
(Right to
Buy)
ISO Stock $8.343 10/19/2009 Common 18756 D
Option Stock
(Right to
Buy)
ISO Stock $14.3438 10/14/2008 Common 3938 D
Option Stock
(Right to
Buy)
ISO Stock $14.5 08/21/2006 Common 15000 D
Option Stock
(Right to
Buy)
ISO Stock $26.4063 10/07/2007 Common 4278 D
Option Stock
(Right to
Buy)
NQ Rights $11.7469 12/16/2003 Common 2874 D
Option Stock
NQ Rights $13.5742 09/30/2004 Common 4796 D
Option Stock
Explanation of Responses:
Options will vest as follows: 10,690 on 1/21/2004.
Options will vest as follows: 4,310 on 1/21/2004, 15,000 on 1/21/2005 and
15,000 on 1/21/2006.
SIGNATURE OF REPORTING PERSON
/s/ Walter K. Ruck
DATE
01/23/2003