1. Name and Address of Reporting Person
Ackley, Robert W.
Crompton Corporation
1 Extrusion Drive
Pawcatuck, CT 06379
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)
Executive V.P. - Polymer Proc.
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 157310 D
Common Stock 2601.4596 I By Wife
Common Stock 516.3034 I ESOP Trust
Common Stock 33708.77 I LTIP Trust
(1TA)
Common Stock 13411.14 I LTIP Trust
1988
Common Stock 5106.5219 I ESPP
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 43654 01/21/2004 02/20/2013 Common 43654 $0.0000 43654 D
Option 003 Stock
(Right to
Buy)
NQ Stock $7.25 11/21/2012 Common 26207 D
Option Stock
(Right to
Buy)
NQ Stock $7.92 11/22/2011 Common 47374 D
Option Stock
(Right to
Buy)
NQ Stock $8.1562 11/30/2010 Common 75000 D
Option Stock
(Right to
Buy)
NQ Stock $8.3437 11/19/2009 Common 88015 D
Option Stock
(Right to
Buy)
NQ Stock $13 12/18/2005 Common 18808 D
Option Stock
(Right to
Buy)
NQ Stock $14.3438 11/14/2008 Common 50000 D
Option Stock
(Right to
Buy)
NQ Stock $14.5 09/21/2006 Common 72416 D
Option Stock
(Right to
Buy)
NQ Stock $14.625 11/19/2004 Common 13163 D
Option Stock
(Right to
Buy)
NQ Stock $16.875 11/16/2006 Common 20000 D
Option Stock
(Right to
Buy)
NQ Stock $19.3125 11/20/2003 Common 10823 D
Option Stock
(Right to
Buy)
NQ Stock $26.4063 11/07/2007 Common 20000 D
Option Stock
(Right to
Buy)
ISO Stock $6.38 01/21/2 A 31346 01/21/2005 01/21/2013 Common 31346 $0.0000 31346 D
Option 003 Stock
(Right to
Buy)
ISO Stock $7.25 10/22/2012 Common 13793 D
Option Stock
(Right to
Buy)
ISO Stock $7.92 10/23/2011 Common 12626 D
Option Stock
(Right to
Buy)
ISO Stock $8.3437 10/19/2009 Common 11985 D
Option Stock
(Right to
Buy)
ISO Stock $13 10/18/2005 Common 7692 D
Option Stock
(Right to
Buy)
ISO Stock $14.5 08/21/2006 Common 27584 D
Option Stock
(Right to
Buy)
ISO Stock $14.625 10/19/2004 Common 6837 D
Option Stock
(Right to
Buy)
ISO Stock $19.3125 10/20/2003 Common 5177 D
Option Stock
(Right to
Buy)
Explanation of Responses:
Options will vest as follows: 25,000 on 1/21/2004, 9,327 on 1/21/2005 and 9,327
on 1/21/2006.
Options will vest as follows: 15,673 on 1/21/2005 and 15,673 on 1/21/2006.
SIGNATURE OF REPORTING PERSON
/s/ Robert W. Ackley
DATE
01/23/2003