CURIAN SERIES TRUST
CURIAN VARAIBLE SERIES TRUST
 
7601 Technology Way, Denver, Colorado 80237
(877) 847-4143
 
 
March 15, 2012
 
 
VIA EDGAR
 
Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C.  20549
 
Re:
Curian Series Trust - File Nos: 333-170606 and 811-22495
 
Curian Variable Series Trust - File Nos: 333-177369 and 811-22613
 
(ALL OF THE ABOVE HEREINAFTER ARE REFERRED TO AS THE “ASSUREDS”)
 
Dear Sir/Madam:
 
On behalf of the Assureds, enclosed herewith for electronic filing pursuant to Rule 17g-1 of the Investment Company Act of 1940, as amended, please find Exhibits 99-1 through 99-4, which collectively meet the requirements of romanettes (a) - (e) of Rule 17g-1, as outlined herein below:
 
(a)
A copy of the CNA Investment Company Fidelity Bond Endorsements (“Fidelity Bond”) insuring the above referenced Assureds, in the amount of $3 million, with the addition of Curian Variable Series Trust effective November 30, 2011, and further extending the Policy Period Expiration date to September 1, 2012, are attached as EXHIBIT 99-1;
(b)
A copy of the Secretary Certificate reflecting the approval of the resolutions of a majority of Trustees of the Board of the Assured who are not “interested persons” of the Trust, approving the form and amount of the Bond is attached as EXHIBIT 99-2;
(c)
A statement showing the amount of a single insured bond, which each Assured would have been required to provide and maintain had each Assured not been named as a joint insured under the Bond (attached as EXHIBIT 99-3);
(d)
Premiums for the Bond have been appropriately paid from March 25, 2011 through the period ending March 25, 2012, and for the extended period through September 1, 2012.
(e)
A copy of the executed joint Fidelity Bond Agreement between the joint Assureds in accordance with Rule 17g-1 (f) is attached under EXHIBIT 99-4.
 
If there are any questions regarding this filing, please contact the undersigned, at (517) 367-4336.
 
Sincerely yours,
 
/s/ Susan S. Rhee
Susan S. Rhee
Vice President, Chief Legal Officer & Secretary
 
Enclosures