NAVIDEA BIOPHARMACEUTICALS I

CUSIP: 63937X103 Class: COM

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

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

Q1 2016
Shares 25,608 Value ($000) $24 Avg Close — Range —
Q4 2015
Shares 25,608 Value ($000) $34 Avg Close — Range —
Q3 2015
Shares 25,608 Value ($000) $58 Avg Close — Range —
Q1 2015
Shares 33,745 Value ($000) $54 Avg Close — Range —
Q4 2014
Shares 34,135 Value ($000) $65 Avg Close — Range —
Q3 2014
Shares 34,934 Value ($000) $46 Avg Close — Range —
Q2 2014
Shares 34,934 Value ($000) $52 Avg Close — Range —