Item 2(d)	Title of Class of Securities:

	Class A Common Stock, par value $0.0000001 per share

Item 2(e)	CUSIP Number:

	852234103

Item 3	Not Applicable

Item 4	Ownership:

	The percentages used herein are calculated based upon the Shares of Class A Common Stock issued and outstanding as of July 26, 2016, as reported on the Issuer’s quarterly report on Form 10-Q filed with the Securities and Exchange Commission by the Issuer for the quarterly period ended June 30, 2016.

	As of the close of business on August 17, 2016:

	1. Point72 Asset Management, L.P.
	(a) Amount beneficially owned: 4,849,400
	(b) Percent of class: 3.9%
	(c)(i) Sole power to vote or direct the vote: -0-
	(ii) Shared power to vote or direct the vote: 4,849,400
	(iii) Sole power to dispose or direct the disposition: -0-
	(iv) Shared power to dispose or direct the disposition: 4,849,400

	2. Point72 Capital Advisors, Inc.
	(a) Amount beneficially owned: 4,849,400
	(b) Percent of class: 3.9%
	(c)(i) Sole power to vote or direct the vote: -0-
	(ii) Shared power to vote or direct the vote: 4,849,400
	(iii) Sole power to dispose or direct the disposition: -0-
	(iv) Shared power to dispose or direct the disposition: 4,849,400

	3. Cubist Systematic Strategies, LLC
	(a) Amount beneficially owned: 40,680
	(b) Percent of class: less than 0.1%
	(c)(i) Sole power to vote or direct the vote: -0-
	(ii) Shared power to vote or direct the vote: 40,680
	(iii) Sole power to dispose or direct the disposition: -0-
	(iv) Shared power to dispose or direct the disposition: 40,680

	4. EverPoint Asset Management, LLC
	(a) Amount beneficially owned: 1,765,000
	(b) Percent of class: 1.4%
	(c)(i) Sole power to vote or direct the vote: -0-
	(ii) Shared power to vote or direct the vote: 1,765,000
	(iii) Sole power to dispose or direct the disposition: -0-
	(iv) Shared power to dispose or direct the disposition: 1,765,000