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*
HOGAN MICHAEL R
(Last) (First) (Middle)
(Street)
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
SIGMA ALDRICH CORP [ SIAL ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
CAO & CFO
3. Date of Earliest Transaction (Month/Day/Year)
02/16/2007
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, $1 Par Value 01/02/2007 J(1) 33,735 A $38.86 67,470 D
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
Stock Option, Right to Buy $41.62 02/16/2007 A 20,000(2)(3) 02/16/2008 02/16/2017 Common Stock, $1 Par Value 20,000 $41.62 20,000 D
Stock Option, Right to Buy $14.625 04/01/1999 A 71,600 04/01/2000 04/01/2009 Common Stock, $1 Par Value 71,600 $14.625 143,200(4) D
Stock Option, Right to Buy $18.25 11/13/2000 A 30,000 11/13/2001 11/13/2010 Common Stock, $1 Par Value 30,000 $18.25 60,000(5) D
Stock Option, Right to Buy $25.315 05/07/2002 A 25,000 05/07/2003 05/07/2012 Common Stock, $1 Par Value 25,000 $25.315 50,000(6) D
Stock Option, Right to Buy $25.86 05/06/2003 A 20,000 05/06/2004 05/06/2013 Common Stock, $1 Par Value 20,000 $25.86 40,000(7) D
Stock Option, Right to Buy $28.66 05/04/2004 A 20,000 05/04/2005 05/04/2014 Common Stock, $1 Par Value 20,000 $28.66 40,000(8) D
Stock Option, Right to Buy $28.825 07/08/2005 A 10,000 07/08/2006 07/08/2015 Common Stock, $1 Par Value 10,000 $28.825 20,000(9) D
Stock Option, Right to Buy $34.03 05/01/2006 A 10,000 05/01/2007 05/01/2016 Common Stock, $1 Par Value 10,000 $34.03 20,000(10) D
Explanation of Responses:
1. On January 2, 2007, the common stock of Sigma-Aldrich Corporation split 2:1, resulting in the reporting person's ownership of 33,735 additional shares of common stock
2. Employee stock option granted pursuant to the Sigma-Aldrich Corporation Long-Term Incentive Plan of 2003, amended 2006 in compliance with rule 16(b)-3
3. Shares granted vest for a period of 3 years as established in the Sigma-Aldrich Corporation 2003 Long-Term Incentive Plan
4. This option was previously reported as covering 71,600 shares at an exercise price of $29.25 per share, but is being adjusted to reflect the 2:1 stock split that occurred on January 2, 2007
5. This option was previously reported as covering 30,000 shares at an exercise price of $36.50 per share, but is being adjusted to reflect the 2:1 stock split that occurred on January 2, 2007
6. This option was previously reported as covering 25,000 shares at an exercise price of $50.63 per share, but is being adjusted to reflect the 2:1 stock split that occurred on January 2, 2007
7. This option was previously reported as covering 20,000 shares at an exercise price of $51.72 per share, but is being adjusted to reflect the 2:1 stock split that occurred on January 2, 2007
8. This option was previously reported as covering 20,000 shares at an exercise price of $57.32 per share, but is being adjusted to reflect the 2:1 stock split that occurred on January 2, 2007
9. This option was previously reported as covering 10,000 shares at an exercise price of $57.65 per share, but is being adjusted to reflect the 2:1 stock split that occurred on January 2, 2007
10. This option was previously reported as covering 10,000 shares at an exercise price of $68.06 per share, but is being adjusted to reflect the 2:1 stock split that occurred on January 2, 2007
Debbie Bockius, Attorney in Fact 02/20/2007
** 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.