XNAS:SIAL Sigma-Aldrich Corp Insider Activity 3 Filing - 3/7/2012

Effective Date 3/7/2012

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FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Bertsch Jan
2. Date of Event Requiring Statement (Month/Day/Year)
03/07/2012
3. Issuer Name and Ticker or Trading Symbol
SIGMA ALDRICH CORP [SIAL]
(Last)
(First)
(Middle)
3050 SPRUCE STREET
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
Executive Vice President & CFO
5. If Amendment, Date Original Filed (Month/Day/Year)
(Street)

ST. LOUIS, MO 63103
6. Individual or Joint/Group Filing (Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
ISO Stock Option Right To Buy 03/05/2013(1) 03/05/2022 Common Stock 4,188 $71.62 D  
NQ Stock Option Right To Buy 03/05/2013(1) 03/05/2022 Common Stock 57,312 $71.62 D  
Restricted Stock Unit 03/05/2014(3) 03/05/2015 Common Stock 12,000 $0(2) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Bertsch Jan
3050 SPRUCE STREET
ST. LOUIS, MO 63103
      Executive Vice President & CFO  

Signatures

Kim Reno 03/05/2012
** Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) The options vest in three equal annual installments: 1/3 on 3/5/2013, 1/3 on 3/5/2014 and 1/3 on 3/5/2015.
(2) Each RSU represents a contingent right to receive one share of SIAL Common Stock.
(3) The Restricted Stock Units granted on 3/5/2012 vest as follows: two equal installments (1/2 on 3/5/2014 and 1/2 on 3/5/2015).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.

XNAS:SIAL Sigma-Aldrich Corp Insider Activity 3 Filling

Sigma-Aldrich Corp XNAS:SIAL Stock - Get Insider Activity SEC Filing of Sigma-Aldrich Corp XNAS:SIAL stocks, including company profile, shares outstanding, strategy, business segments, operations, officers, consolidated financial statements, financial notes and ownership information.

XNAS:SIAL Sigma-Aldrich Corp Insider Activity 3 Filing - 3/7/2012
Name |  Ticker |  Star Rating |  Market Cap |  Stock Type |  Sector |  Industry Star Rating |  Investment Style |  Total Assets |  Category |  Top Holdings |  Top Sectors |  Symbol |  Title Star Rating |  Category |  Total Assets |  Top Holdings |  Top Sectors |  Symbol |  Name Title |  Date |  Author |  Collection |  Interest |  Popularity Topic |  Sector |  Key Indicators |  User Interest |  Market Cap |  Industry Name |  Ticker |  Star Rating |  Market Cap |  Stock Type |  Sector |  Industry Star Rating |  Investment Style |  Total Assets |  Category |  Top Holdings |  Top Sectors |  Symbol / Ticker |  Title Star Rating |  Category |  Total Assets |  Symbol / Ticker |  Name Title |  Date |  Author |  Collection |  Popularity |  Interest Title |  Date |  Company |  Symbol |  Interest |  Popularity Topic |  Sector |  Key Indicators |  User Interest |  Market Cap |  Industry Title |  Date |  Company |  Symbol |  Interest |  Popularity

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