PROOFPOINT INC

CUSIP: 743424AB9 Class: CONV

MACKAY SHIELDS LLC's Holding History (CIK: 0000061227)

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

Q1 2017
Shares 5,674,000 Value ($000) $10,866 Avg Close — Range —
Q4 2016
Shares 5,674,000 Value ($000) $10,387 Avg Close — Range —
Q3 2016
Shares 5,679,000 Value ($000) $10,989 Avg Close — Range —
Q2 2016
Shares 5,679,000 Value ($000) $9,516 Avg Close — Range —
Q1 2016
Shares 4,412,000 Value ($000) $6,461 Avg Close — Range —
Q4 2015
Shares 4,412,000 Value ($000) $7,622 Avg Close — Range —
Q3 2015
Shares 9,107,000 Value ($000) $14,930 Avg Close — Range —
Q2 2015
Shares 8,904,000 Value ($000) $15,098 Avg Close — Range —
Q1 2015
Shares 13,026,000 Value ($000) $20,817 Avg Close — Range —
Q4 2014
Shares 13,259,000 Value ($000) $18,173 Avg Close — Range —