SYNTHETIC BIOLOGICS INC

CUSIP: 87164U102 Class: COM

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

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

Q1 2017
Shares 17,799 Value ($000) $11 Avg Close — Range —
Q4 2016
Shares 17,799 Value ($000) $14 Avg Close — Range —
Q3 2016
Shares 13,319 Value ($000) $23 Avg Close — Range —
Q2 2016
Shares 13,319 Value ($000) $24 Avg Close — Range —