SUPERTEX INC

CUSIP: 868532102 Class: COM

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q4 2013
Shares 993,280 Value ($000) $24,882 Avg Close — Range —
Q3 2013
Shares 854,080 Value ($000) $21,643 Avg Close — Range —
Q2 2013
Shares 783,962 Value ($000) $18,745 Avg Close — Range —