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

SCHEDULE 13G

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

Zoltek Companies, Inc.
(Name of Issuer)

Common Stock, $0.01 Par Value
(Title of Class of Securities)

98975W104
(CUSIP Number)

December 31, 2013
(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).

CUSIP No. 98975W104
-------------------------------------------
1. Names of Reporting Persons.

Barclays PLC

-------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)

(a) [ ]
(b) [ ]

-------------------------------------------
3. SEC Use Only

-------------------------------------------
4. Citizenship or Place of Organization

England, United Kingdom

                                5. Sole Voting Power
Number of                               1,946,584
Shares                          ------------------------------
Beneficially                    6. Shared Voting Power
Owned by Each                           -0-
Reporting                       ------------------------------
Person With:                    7. Sole Dispositive Power
                                        1,946,584
                                ------------------------------
                                8. Shared Dispositive Power
                                        -0-

--------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person

1,946,584
--------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
                        (See Instructions)  [ ]

--------------------------------------------
11. Percent of Class Represented by Amount in Row (9)

5.66%
--------------------------------------------
12. Type of Reporting Person (See Instructions)

HC
---------------------------------------------


CUSIP No. 98975W104
---------------------------------------------
1. Names of Reporting Persons.

Barclays Capital Inc.

----------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)

(a) [ ]
(b) [ ]

----------------------------------------------
3. SEC Use Only

----------------------------------------------
4. Citizenship or Place of Organization

Connecticut, United States

                                5. Sole Voting Power
Number of                               13,040
Shares                          ------------------------------
Beneficially                    6. Shared Voting Power
Owned by Each                           -0-
Reporting                       ------------------------------
Person With:                    7. Sole Dispositive Power
                                        13,040
                                ------------------------------
                                8. Shared Dispositive Power
                                        -0-

-----------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person

13,040

-----------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
                        (See Instructions)  [ ]

-----------------------------------------------
11. Percent of Class Represented by Amount in Row (9)

0.04%
-----------------------------------------------
12. Type of Reporting Person (See Instructions)

BD
-----------------------------------------------


CUSIP No. 98975W104
-----------------------------------------------
1. Names of Reporting Persons.

Barclays Bank PLC

-----------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)

(a) [ ]
(b) [ ]

----------------------------------------------
3. SEC Use Only

----------------------------------------------
4. Citizenship or Place of Organization

England, United Kingdom

                                5. Sole Voting Power
Number of                               621,682
Shares                          ------------------------------
Beneficially                    6. Shared Voting Power
Owned by Each                           -0-
Reporting                       ------------------------------
Person With:                    7. Sole Dispositive Power
                                        621,682
                                ------------------------------
                                8. Shared Dispositive Power
                                        -0-

------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person

621,682

------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
                        (See Instructions)  [ ]

------------------------------------------------
11. Percent of Class Represented by Amount in Row (9)

1.81%
------------------------------------------------
12. Type of Reporting Person (See Instructions)

BK
------------------------------------------------


CUSIP No. 98975W104
------------------------------------------------
1. Names of Reporting Persons.

Barclays Capital Securities Limited

------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)

(a) [ ]
(b) [ ]

------------------------------------------------
3. SEC Use Only

------------------------------------------------
4. Citizenship or Place of Organization

England, United Kingdom

                                5. Sole Voting Power
Number of                               88,800
Shares                          ------------------------------
Beneficially                    6. Shared Voting Power
Owned by Each                           -0-
Reporting                       ------------------------------
Person With:                    7. Sole Dispositive Power
                                        88,800
                                ------------------------------
                                8. Shared Dispositive Power
                                        -0-

-------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person
88,800

-------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
                        (See Instructions)  [ ]

-------------------------------------------------
11. Percent of Class Represented by Amount in Row (9)

0.26%
-------------------------------------------------
12. Type of Reporting Person (See Instructions)
BD
-------------------------------------------------


CUSIP No. 98975W104
-------------------------------------------------
1. Names of Reporting Persons.

Barclays Capital Derivative Funding

-------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)

(a) [ ]
(b) [ ]

-------------------------------------------------
3. SEC Use Only

-------------------------------------------------
4. Citizenship or Place of Organization

Delaware, United States

                                5. Sole Voting Power
Number of                               1,223,062
Shares                          ------------------------------
Beneficially                    6. Shared Voting Power
Owned by Each                           -0-
Reporting                       ------------------------------
Person With:                    7. Sole Dispositive Power
                                        1,223,062
                                ------------------------------
                                8. Shared Dispositive Power
                                        -0-

-------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person
1,223,062

-------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
                        (See Instructions)  [ ]

-------------------------------------------------
11. Percent of Class Represented by Amount in Row (9)

3.56%
-------------------------------------------------
12. Type of Reporting Person (See Instructions)

BD
-------------------------------------------------


Item 1.

(a) Name of Issuer:
        Zoltek Companies, Inc.


(b) Address of Issuer's Principal Executive Offices:
        3101 McKelvey Road
        St. Louis, Missouri 63044

--------------------------------------------------

Item 2.

(a) Name of Person Filing:
        (1) Barclays PLC
        (2) Barclays Capital Inc.
        (3) Barclays Bank PLC
        (4) Barclays Capital Securities Limited
        (5) Barclays Capital Derivative Funding

(b) Address of Principal Business Office or, if none, Residence:
        (1) Barclays PLC
        1 Churchill Place,
        London, E14 5HP, England

        (2) Barclays Capital Inc.
        745 Seventh Avenue
        New York, NY 10019

        (3) Barclays Bank PLC
        1 Churchill Place,
        London, E14 5HP, England

        (4) Barclays Capital Securities Limited
        5 The North Colonnade
        Canary Wharf
        London, E14 4BB, England

        (5) Barclays Capital Derivative Funding
        c/o Corporation Trust Company, Corporation Trust Center
        1209 Orange Street
        Wilmington, DE 19801


(c) Citizenship:
        (1) Barclays PLC: England, United Kingdom
        (2) Barclays Capital Inc.: Connecticut, United States
        (3) Barclays Bank PLC: England, United Kingdom
        (4) Barclays Capital Securities Limited: England, United Kingdom
        (5) Barclays Capital Derivative Funding: Delaware, United States

(d) Title of Class of Securities:   Common Stock, $0.01 Par Value

(e) CUSIP Number: 98975W104

-----------------------------------------------------

Item 3. If this statement is filed pursuant to Sub-Section 240.13d-1
        (b) or 240.13d-2(b)
        or (c), check whether the person filing is a:

(a) [X] Broker or dealer registered under section 15 of
        the Act (15 U.S.C. 78o);
(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c) [ ] Insurance company as defined in section 3(a)(19) of the
        Act (15 U.S.C. 78c);
(d) [ ] Investment company registered under section 8
        of the Investment
        Company Act of 1940 (15 U.S.C. 80a-8);
(e) [ ] An investment adviser in accordance with
        Sub-Section 240.13d-1(b)(1)(ii)(E);
(f) [ ] An employee benefit plan or endowment fund in accordance with
        Sub-Section 240.13d-1(b)(1)(ii)(F);
(g) [X] A parent holding company or control person in accordance with
        Sub-Section 240.13d-1(b)(1)(ii)(G);
(h) [ ] A savings association as defined in Section 3(b) of the
        Federal Deposit Insurance Act (12 U.S.C. 1813);
(i) [ ] A church plan that is excluded from the
        definition of an investment company under
        section 3(c)(14) of the Investment Company Act
        of 1940 (15 U.S.C. 80a-3);
(j) [X] A non-U.S. institution that is the functional
        equivalent of any of the institutions listed
        in Rule 240.13d-1 (b)(1)(ii)(A) through (I);
(k) [ ] Group, in accordance with Sub-Section 240.13d-1(b)(1)(ii)(J).

------------------------------------------------------

Item 4. Ownership.

        Provide the following information regarding the
        aggregate number and percentage of the class of
        securities of the issuer identified in Item 1.

(a) Amount beneficially owned:
        See the response(s) to Item 9 on the attached cover page(s).

(b) Percent of class:
        See the response(s)to Item 11 on the attached cover page(s).

(c) Number of shares as to which the person has:

        (i)    Sole power to vote or to direct the vote:
                See the response(s) to Item 5 on the attached cover page(s).

        (ii)   Shared power to vote or to direct the vote:
                See the response(s) to Item 6 on the attached cover page(s).

        (iii)  Sole power to dispose or to direct the disposition of:
                See the response(s) to  Item 7  on the attached cover page(s).


        (iv)   Shared power to dispose or to direct the disposition of:
                See the response(s) to  Item 8  on the attached cover page(s).


--------------------------------------------------------

Item 5. Ownership of Five Percent or Less of a Class.

        If this statement is being filed to report the fact
        that as of the date hereof the reporting person has
        ceased to be the beneficial owner of more than five
        percent of the class of securities, check the following

[]
--------------------------------------------------------

Item 6. Ownership of More than Five Percent on Behalf
        of Another Person.

                Not Applicable.
-------------------------------------------------------

Item 7. Identification and Classification of the Subsidiary
        Which Acquired the Security Being Reported on By
        the Parent Holding Company.

                See Exhibit A.
--------------------------------------------------------

Item 8. Identification and Classification of Members of the Group.

                Not Applicable.
--------------------------------------------------------
Item 9. Notice of Dissolution of Group.

                Not Applicable.
-------------------------------------------------------

Item 10.        Certification.

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

                Dated: February 12, 2014

                By : Dirk Young

                Title: Managing Director, Head of Central Compliance, GCS

--------------------------------------------------------
INDEX TO EXHIBITS

Exhibit A       Item 7 Information

Exhibit B       Joint Filing Agreement










-------------------------------------------------------

EXHIBIT A

        The securities being reported on by Barclays PLC,
        as a parent holding company, are owned, or may be
        deemed to be beneficially owned, by Barclays Capital
        Inc., a broker or dealer registered  under  Section
        15 of the Act, Barclays Bank PLC, a non-US banking
        institution authorised by the Prudential Regulation
        Authority and regulated by the Financial Conduct Authority
        and the Prudential Regulation Authority in the United Kingdom
        and Barclays Capital Securities Limited, a non-US broker or
        dealer regulated by the Financial Conduct Authority and
        the Prudential Regulation Authority in the United Kingdom.
        Barclays Capital Inc., Barclays Bank PLC,Barclays Capital
        Derivative Funding and Barclays Capital Securities Limited
        are wholly-owned subsidiaries of Barclays PLC.

-------------------------------------------------------


EXHIBIT B

JOINT FILING AGREEMENT
The undersigned hereby agree that the Statement on
Schedule 13G filed herewith (and any amendments thereto),
is being filed jointly with the Securities and Exchange
Commission pursuant to Rule 13d-1(k) (1) under the Securities
Exchange Act of 1934, as amended, on behalf of each such person.


Dated: February 12, 2014



BARCLAYS PLC
By:
Name: Dirk Young

Title: Managing Director, Head of Central Compliance, GCS


BARCLAYS CAPITAL INC.
By:
Name: Dirk Young

Title: Managing Director, Head of Central Compliance, GCS


BARCLAYS BANK PLC
By:
Name: Dirk Young

Title: Managing Director, Head of Central Compliance, GCS


Barclays Capital Securities Limited
By:
Name: Dirk Young

Title: Managing Director, Head of Central Compliance, GCS


Barclays Capital Derivative Funding
By:
Name: Dirk Young

Title: Managing Director, Head of Central Compliance, GCS

Zoltek (NASDAQ:ZOLT)
Historical Stock Chart
From Apr 2024 to May 2024 Click Here for more Zoltek Charts.
Zoltek (NASDAQ:ZOLT)
Historical Stock Chart
From May 2023 to May 2024 Click Here for more Zoltek Charts.