SYCAMORE NETWORKS, INC

CUSIP: 871206405 Class: COMMON STOCK

BLAIR WILLIAM & CO/IL's Holding History (CIK: 0000902367)

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

Q3 2013
Shares 20,500 Value ($000) $9 Avg Close — Range —
Q2 2013
Shares 20,500 Value ($000) $10 Avg Close — Range —