JAMES RIV GROUP LTD

Ticker: JRVR CUSIP: G5005R107 Class: Common Stock

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q1 2018

Shares 31,541 Value ($000) $1,119 Avg Close $36.38 Range $32.17 - $40.53

Q4 2017

Shares 35,786 Value ($000) $1,432 Avg Close $40.57 Range $37.24 - $44.34

Q3 2017

Shares 36,236 Value ($000) $1,503 Avg Close $39.92 Range $37.28 - $42.18

Q2 2017

Shares 41,792 Value ($000) $1,660 Avg Close $40.95 Range $38.33 - $44.11

Q1 2017

Shares 32,310 Value ($000) $1,385 Avg Close $41.52 Range $39.21 - $46.20

Q4 2016

Shares 25,842 Value ($000) $1,074 Avg Close $38.79 Range $35.25 - $42.17

Q3 2016

Shares 26,593 Value ($000) $963 Avg Close $35.15 Range $33.04 - $38.31

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2018	31,541	$1,119	$36.38	$32.17 - $40.53
Q4 2017	35,786	$1,432	$40.57	$37.24 - $44.34
Q3 2017	36,236	$1,503	$39.92	$37.28 - $42.18
Q2 2017	41,792	$1,660	$40.95	$38.33 - $44.11
Q1 2017	32,310	$1,385	$41.52	$39.21 - $46.20
Q4 2016	25,842	$1,074	$38.79	$35.25 - $42.17
Q3 2016	26,593	$963	$35.15	$33.04 - $38.31