EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the annual report of Northwest Biotherapeutics, Inc. (the “Company”) on Form 10-Q for the quarter ended June 30, 2014, as filed with the Securities and Exchange Commission (the “Report”), I, Linda F. Powers, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)         The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)         The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 14, 2014
By:	/s/ Linda F. Powers
	Name:	Linda F. Powers
	Title:	President and Chief Executive Officer
		Principal Executive Officer
		Principal Financial and Accounting Officer