SCHEDULE 13G Amendment No. 0 SPDR SER TR COMMON STOCK Cusip #78464A730 Cusip #78464A730 Item 1: 	 	Reporting Person - FMR LLC Item 4: 	 	Delaware Item 5: 	 	1,269,237 Item 6: 	 	0 Item 7: 	 	1,269,237 Item 8: 	 	0 Item 9: 	 	1,269,237 Item 11: 	 	11.435% Item 12: 	 	HC Cusip #78464A730 Item 1: 	 	Reporting Person - Edward C. Johnson 3d Item 4: 	 	United States of America Item 5: 	 	0 Item 6: 	 	0 Item 7: 	 	1,269,237 Item 8: 	 	0 Item 9: 	 	1,269,237 Item 11: 	 	11.435% Item 12: 	 	IN SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b) Item 1(a). 	 	Name of Issuer: 	 	 	SPDR SER TR Item 1(b). 	 	Name of Issuer's Principal Executive Offices: 	 	 	One Lincoln Street LCC6 	 	 	Boston, MA 02111 Item 2(a). 	 	 Name of Person Filing: 	 	 	 FMR LLC Item 2(b). 	 	 Address or Principal Business Office or, if None, Residence: 	 	 	 245 Summer Street, Boston, Massachusetts 02210 Item 2(c). 	 	 Citizenship: 	 	 	 Not applicable Item 2(d). 	 	 Title of Class of Securities: 	 	 	 COMMON STOCK Item 2(e). 	 	 CUSIP Number: 	 	 	 78464A730 Item 3. 	 	This statement is filed pursuant to Rule 13d-1(b) or 13d-2(b) and the person filing, FMR LLC, is a parent holding company in accordance with Section 240.13d- 1(b)(ii)(G). (Note: See Item 7). Item 4. 	 	Ownership 	 	 	(a) Amount Beneficially Owned: 	1,269,237 	 	 	(b) Percent of Class: 	11.435% 	 	 	(c) Number of shares as to which such person has: 	 	 	 (i) sole power to vote or to direct the vote: 1,269,237 	 	 	 (ii) shared power to vote or to direct the vote: 	0 	 	 	 (iii) sole power to dispose or to direct the disposition of: 	1,269,237 	 	 	 (iv) shared power to dispose or to direct the disposition of: 	0 Item 5. 	 	Ownership of Five Percent or Less of a Class. 	 	 	Not applicable. Item 6. 	 	Ownership of More than Five Percent on Behalf of Another Person. 	 	 	Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the COMMON STOCK of SPDR SER TR. The interest of one person, Strategic Advisers U.S. Opportunity Fund, an investment company registered under the Investment Company Act of 1940, in the COMMON STOCK of SPDR SER TR, amounted to 1,269,100 shares or 11.433% of the total outstanding COMMON STOCK at April 30, 2014. Item 7. 	 	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company. 	 	 	See attached Exhibit A. Item 8. 	 	Identification and Classification of Members of the Group. 	 	 	Not applicable. See attached Exhibit A. 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 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. 	May 9, 2014 	Date 	/s/ Scott C. Goebel 	Signature 	Scott C. Goebel 	 Duly authorized under Power of Attorney effective as of June 1, 2008, by and on behalf of FMR LLC and its direct and indirect subsidiaries SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b) The ownership of one investment company, Strategic Advisers U.S. Opportunity Fund, amounted to 1,269,100 shares or 11.433% of the COMMON STOCK outstanding. Strategic Advisers U.S. Opportunity Fund has its principal business office at 245 Summer Street, Boston, Massachusetts 02210. Strategic Advisers, Inc., 245 Summer Street, Boston, Massachusetts 02210, a wholly-owned subsidiary of FMR LLC and an investment adviser registered under Section 203 of the Investment Advisers Act of 1940, provides investment advisory services to individuals. As such, FMR LLC's beneficial ownership includes 1,269,113 shares, or 11.433%, of the COMMON STOCK outstanding of SPDR SER TR, beneficially owned through Strategic Advisers, Inc. Members of the family of Edward C. Johnson 3d, Chairman of FMR LLC, are the predominant owners, directly or through trusts, of Series B voting common shares of FMR LLC, representing 49% of the voting power of FMR LLC. The Johnson family group and all other Series B shareholders have entered into a shareholders' voting agreement under which all Series B voting common shares will be voted in accordance with the majority vote of Series B voting common shares. Accordingly, through their ownership of voting common shares and the execution of the shareholders' voting agreement, members of the Johnson family may be deemed, under the Investment Company Act of 1940, to form a controlling group with respect to FMR LLC. SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b) RULE 13d-1(f)(1) AGREEMENT The undersigned persons, on May 9, 2014, agree and consent to the joint filing on their behalf of this Schedule 13G in connection with their beneficial ownership of the COMMON STOCK of SPDR SER TR at April 30, 2014. 	FMR LLC 	By /s/ Scott C. Goebel 	Scott C. Goebel 	Duly authorized under Power of Attorney effective as of June 1, 2008, by and on behalf of FMR LLC and its direct and indirect subsidiaries 	Edward C. Johnson 3d 	By /s/ Scott C. Goebel 	Scott C. Goebel 	Duly authorized under Power of Attorney effective as of June 1, 2008, by and on behalf of Edward C. Johnson 3d 	Strategic Advisers U.S. Opportunity Fund 	By /s/ Scott C. Goebel 	Scott C. Goebel 	Secretary Document-Separator. This page separates the filing documents of two notifications. Page of Exhibit A