HERITAGE CRYSTAL CLEAN INC

CUSIP: 42726M106 Class: Common Stock

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

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

Q1 2019
Shares 21,101 Value ($000) $579 Avg Close — Range —
Q4 2018
Shares 21,101 Value ($000) $486 Avg Close — Range —
Q3 2018
Shares 32,801 Value ($000) $700 Avg Close — Range —
Q3 2017
Shares 33,300 Value ($000) $724 Avg Close — Range —
Q1 2017
Shares 19,800 Value ($000) $271 Avg Close — Range —
Q4 2016
Shares 57,200 Value ($000) $898 Avg Close — Range —
Q3 2016
Shares 44,300 Value ($000) $588 Avg Close — Range —
Q2 2016
Shares 52,000 Value ($000) $635 Avg Close — Range —
Q1 2016
Shares 67,000 Value ($000) $666 Avg Close — Range —
Q4 2015
Shares 60,500 Value ($000) $641 Avg Close — Range —