TESARO INC

CUSIP: 881569107 Class: COM

LOOMIS SAYLES & CO L P's Holding History (CIK: 0000312348)

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

Q3 2015
Shares 217,809 Value ($000) $8,735 Avg Close — Range —
Q2 2015
Shares 218,094 Value ($000) $12,822 Avg Close — Range —
Q1 2015
Shares 180,946 Value ($000) $10,386 Avg Close — Range —
Q4 2014
Shares 451,183 Value ($000) $16,779 Avg Close — Range —
Q3 2014
Shares 474,067 Value ($000) $12,761 Avg Close — Range —
Q3 2013
Shares 41,224 Value ($000) $1,597 Avg Close — Range —
Q2 2013
Shares 40,768 Value ($000) $1,335 Avg Close — Range —