ABIOMED INC

CUSIP: 003654100 Class: COM

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q1 2017
Shares 33,480 Value ($000) $4,192 Avg Close — Range —
Q4 2016
Shares 37,050 Value ($000) $4,175 Avg Close — Range —
Q3 2016
Shares 46,680 Value ($000) $6,002 Avg Close — Range —
Q2 2016
Shares 53,630 Value ($000) $5,861 Avg Close — Range —
Q1 2016
Shares 60,420 Value ($000) $5,728 Avg Close — Range —
Q4 2015
Shares 46,110 Value ($000) $4,163 Avg Close — Range —
Q3 2015
Shares 95,960 Value ($000) $8,901 Avg Close — Range —
Q2 2015
Shares 145,540 Value ($000) $9,566 Avg Close — Range —
Q1 2015
Shares 102,270 Value ($000) $7,320 Avg Close — Range —