INTERACTIVE BROKERS GROUP IN

Ticker: IBKR CUSIP: 45841N107 Class: EQTY

ALTAROCK PARTNERS LLC's Holding History (CIK: 0001631014)

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

Q2 2016

Shares 7,201 Value ($000) $255 Avg Close $8.92 Range $7.90 - $9.67

Q1 2016

Shares 27,201 Value ($000) $1,070 Avg Close $8.23 Range $6.87 - $10.05

Q4 2015

Shares 27,201 Value ($000) $1,186 Avg Close $9.71 Range $8.53 - $10.45

Q3 2015

Shares 27,201 Value ($000) $1,074 Avg Close $9.55 Range $8.25 - $10.65

Q2 2015

Shares 33,101 Value ($000) $1,376 Avg Close $8.40 Range $7.45 - $9.84

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2016	7,201	$255	$8.92	$7.90 - $9.67
Q1 2016	27,201	$1,070	$8.23	$6.87 - $10.05
Q4 2015	27,201	$1,186	$9.71	$8.53 - $10.45
Q3 2015	27,201	$1,074	$9.55	$8.25 - $10.65
Q2 2015	33,101	$1,376	$8.40	$7.45 - $9.84