NORTHSTAR ASSET MGMT GROUP I

CUSIP: 66705Y104 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2016
Shares 34,972 Value ($000) $522 Avg Close — Range —
Q3 2016
Shares 29,707 Value ($000) $384 Avg Close — Range —
Q1 2016
Shares 120,685 Value ($000) $1,370 Avg Close — Range —
Q4 2015
Shares 212,922 Value ($000) $2,585 Avg Close — Range —
Q3 2015
Shares 159,298 Value ($000) $2,288 Avg Close — Range —
Q2 2015
Shares 180,880 Value ($000) $3,344 Avg Close — Range —
Q1 2015
Shares 112,668 Value ($000) $2,630 Avg Close — Range —
Q4 2014
Shares 255,357 Value ($000) $5,763 Avg Close — Range —
Q3 2014
Shares 368,233 Value ($000) $6,783 Avg Close — Range —