TETRA TECH INC

CUSIP: 88162g103 Class: COM

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

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

Q4 2019
Shares 4,230 Value ($000) $364 Avg Close — Range —
Q3 2019
Shares 8,630 Value ($000) $749 Avg Close — Range —
Q2 2019
Shares 11,030 Value ($000) $866 Avg Close — Range —
Q1 2019
Shares 10,330 Value ($000) $616 Avg Close — Range —
Q4 2018
Shares 10,330 Value ($000) $535 Avg Close — Range —
Q3 2018
Shares 11,830 Value ($000) $808 Avg Close — Range —
Q2 2018
Shares 11,130 Value ($000) $651 Avg Close — Range —
Q1 2018
Shares 16,830 Value ($000) $824 Avg Close — Range —
Q4 2017
Shares 16,710 Value ($000) $805 Avg Close — Range —