ADTRAN INC

CUSIP: 00738A106 Class: COMMON STOCK

Cambridge Investment Research Advisors, Inc.'s Holding History (CIK: 0001419186)

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

Q4 2017
Shares 30,330 Value ($000) $587 Avg Close — Range —
Q3 2017
Shares 26,274 Value ($000) $631 Avg Close — Range —