NORTHWEST BIOTHERAPEUTICS IN

Ticker: NWBO CUSIP: 66737P600 Class: COM

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

Note: Option positions (PUT/CALL) are excluded.

Q2 2015

Shares 12,868 Value ($000) $128 Avg Close $8.76 Range $7.05 - $10.79

Q3 2014

Shares 11,638 Value ($000) $59 Avg Close $6.14 Range $4.98 - $7.52

Q2 2014

Shares 11,638 Value ($000) $78 Avg Close $6.36 Range $4.87 - $9.35

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2015	12,868	$128	$8.76	$7.05 - $10.79
Q3 2014	11,638	$59	$6.14	$4.98 - $7.52
Q2 2014	11,638	$78	$6.36	$4.87 - $9.35