Schedule 13G Page _____ of _____ Pages

1 6

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

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. ___)*

38

SIGMA-ALDRICH CORPORATION
(Name of Issuer)

COMMON SHARES
(Title of Class of Securities)

826552101
(Cusip Number)

12/31/2015
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).
Schedule 13G Page _____ of _____ Pages
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Item 1(a) and (b). Name and Address of Issuer & Principal Executive Offices:

SIGMA-ALDRICH CORPORATION
3050 SPRUCE ST.
ST. LOUIS, MO 63103

Item 2(a). Name of Person Filing: State Farm Mutual Automobile Insurance Company and related entities; See Item 8 and Exhibit A

Item 2(b). Address of Principal Business Office: One State Farm Plaza Bloomington, IL 61710

Item 2(c). Citizenship: United States

Item 2(d) and (e). Title of Class of Securities and Cusip Number: See above.

Item 3. This Schedule is being filed, in accordance with 240.13d-1(b). See Exhibit A attached.

Item 4(a). Amount Beneficially Owned: 0 shares

Item 4(b). Percent of Class: 0.00 percent pursuant to Rule 13d-3(d)(1).

Item 4(c). Number of shares as to which such person has:
(i) Sole Power to vote or to direct the vote:
(ii) Shared power to vote or to direct the vote:
(iii) Sole Power to dispose or to direct disposition of:
(iv) Shared Power to dispose or to direct disposition of:

Item 5. Ownership of Five Percent or less of a Class: Yes, see Item 4(b)

Item 6. Ownership of More than Five Percent on Behalf of Another Person: N/A

Item 7. Identification and Classification of the Subsidiary Which Acquired the Security being Reported on by the Parent Holding Company: N/A

Item 8. Identification and Classification of Members of the Group: See Exhibit A attached.

Item 9. Notice of Dissolution of Group: N/A Schedule 13G Page _____ of _____ Pages
3 6

Item 10. Certification. By signing below I certify that, to the best of
my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purpose or effect.

Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

            01/22/2016                   STATE FARM MUTUAL AUTOMOBILE
_________________________________
               Date                        INSURANCE COMPANY

                                         STATE FARM LIFE INSURANCE COMPANY

                                         STATE FARM FIRE AND CASUALTY
                                           COMPANY

STATE FARM INSURANCE COMPANIES           STATE FARM INVESTMENT MANAGEMENT
  EMPLOYEE RETIREMENT TRUST                CORP.

STATE FARM INSURANCE COMPANIES           STATE FARM ASSOCIATES FUNDS
  SAVINGS AND THRIFT PLAN FOR              TRUST - STATE FARM GROWTH FUND
  U.S. EMPLOYEES
                                         STATE FARM ASSOCIATES FUNDS
                                           TRUST - STATE FARM BALANCED
                                           FUND

                                         STATE FARM MUTUAL FUND TRUST

        /s/ Paul N. Eckley
 _________________________________                 /s/ Paul N. Eckley
                                          _________________________________
    Paul N. Eckley, Fiduciary of            Paul N. Eckley, Vice President
         each of the above                       of each of the above
Schedule 13G                                      Page _____ of _____ Pages
                                                         4        6

EXHIBIT A

This Exhibit lists the entities affiliated with State Farm Mutual Automobile Insurance Company ("Auto Company") which might be deemed to constitute a "group" with regard to the ownership of shares reported herein.

Auto Company, an Illinois-domiciled insurance company, is the parent company of multiple wholly owned insurance company subsidiaries, including State Farm Life Insurance Company, and State Farm Fire and Casualty Company. Auto Company is also the parent company of State Farm Investment Management Corp. ("SFIMC"), which is a registered transfer agent under the Securities Exchange Act of 1934 and a registered investment advisor under the Investment Advisers Act of 1940. SFIMC serves as transfer agent and investment adviser to State Farm Associates' Funds Trust, State Farm Variable Product Trust, and State Farm Mutual Fund Trust, three Delaware Business Trusts that are registered investment companies under the Investment Company Act of 1940. Auto Company also sponsors two qualified retirement plans for the benefit of its employees, which plans are named the State Farm Insurance Companies Employee Retirement Trust and the State Farm Insurance Companies Savings and Thrift Plan for U.S. Employees (collectively the "Qualified Plans").

As part of its corporate structure, Auto Company has established an Investment Department. The Investment Department is directly or indirectly responsible for managing or overseeing the management of the investment and reinvestment of assets owned by each person that has joined in filing this Schedule 13G. Moreover, the Investment Department is responsible for voting proxies or overseeing the voting of proxies related to issuers the shares of which are held by one or more entities that have joined in filing this report. Each insurance company included in this report and SFIMC have established an Investment Committee that oversees the activities of the Investment Department in managing the firm's assets. The Trustees of the Qualified Plans perform a similar role in overseeing the investment of each plan's assets.

Pursuant to Rule 13d-4 each person listed in the table below expressly disclaims "beneficial ownership" as to all shares as to which such person has no right to receive the proceeds of sale of the security and disclaims that it is part of a "group".

 Schedule 13G                                      Page _____ of _____ Pages
                                                          5        6


                                                               Number of
                                                              Shares based
                                             Classification   on Proceeds
Name                                          Under Item 3      of Sale
____                                         ______________   ____________

State Farm Mutual Automobile Insurance Company   IC                 0 shares
State Farm Life Insurance Company                IC                 0 shares
State Farm Fire and Casualty Company             IC                 0 shares
State Farm Investment Management Corp.           IA                 0 shares
State Farm Associates Funds Trust - State
    Farm Growth Fund                             IV                 0 shares
State Farm Associates Funds Trust - State
    Farm Balanced Fund                           IV                 0 shares
State Farm International Life Insurance
    Company Ltd.                                 IV                 0 shares
State Farm Insurance Companies Employee
    Retirement Trust                             EP                 0 shares
State Farm Insurance Companies Savings and
    Thrift Plan for U.S. Employees               EP
  Equities Account                                                  0 shares
  Balanced Account                                                  0 shares
State Farm Mutual Fund Trust                     IV                 0 shares
                                                    -----------------
                                                                    0 shares

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