POTBELLY CORP

CUSIP: 73754Y100 Class: Common Stock

STATE OF MICHIGAN RETIREMENT SYSTEM's Holding History (CIK: 0000762152)

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

Q3 2015
Shares 10,052 Value ($000) $111 Avg Close — Range —
Q1 2015
Shares 28,132 Value ($000) $385 Avg Close — Range —