PROASSURANCE CORP

Ticker: PRA CUSIP: 74267C106 Class: Common Stock

Robeco Institutional Asset Management B.V.'s Holding History (CIK: 0001418773)

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

Q2 2018

Shares 189,914 Value ($000) $6,731 Avg Close $41.80 Range $35.05 - $48.55

Q1 2018

Shares 371,244 Value ($000) $18,024 Avg Close $51.96 Range $46.90 - $57.10

Q4 2017

Shares 421,441 Value ($000) $24,087 Avg Close $58.36 Range $54.30 - $63.45

Q3 2017

Shares 470,892 Value ($000) $25,734 Avg Close $56.56 Range $50.70 - $61.90

Q2 2017

Shares 470,404 Value ($000) $28,600 Avg Close $60.01 Range $57.25 - $62.80

Q1 2017

Shares 303,843 Value ($000) $18,307 Avg Close $57.39 Range $53.30 - $61.90

Q4 2016

Shares 292,397 Value ($000) $16,434 Avg Close $55.39 Range $50.50 - $63.53

Q3 2016

Shares 285,146 Value ($000) $14,965 Avg Close $53.02 Range $50.84 - $55.43

Q2 2016

Shares 238,979 Value ($000) $12,796 Avg Close $50.11 Range $47.19 - $53.57

Q1 2016

Shares 238,979 Value ($000) $12,093 Avg Close $49.35 Range $45.78 - $51.24

Q4 2015

Shares 229,831 Value ($000) $11,155 Avg Close $51.37 Range $47.04 - $53.62

Q3 2015

Shares 47,716 Value ($000) $2,340 Avg Close $48.57 Range $46.28 - $50.54

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	189,914	$6,731	$41.80	$35.05 - $48.55
Q1 2018	371,244	$18,024	$51.96	$46.90 - $57.10
Q4 2017	421,441	$24,087	$58.36	$54.30 - $63.45
Q3 2017	470,892	$25,734	$56.56	$50.70 - $61.90
Q2 2017	470,404	$28,600	$60.01	$57.25 - $62.80
Q1 2017	303,843	$18,307	$57.39	$53.30 - $61.90
Q4 2016	292,397	$16,434	$55.39	$50.50 - $63.53
Q3 2016	285,146	$14,965	$53.02	$50.84 - $55.43
Q2 2016	238,979	$12,796	$50.11	$47.19 - $53.57
Q1 2016	238,979	$12,093	$49.35	$45.78 - $51.24
Q4 2015	229,831	$11,155	$51.37	$47.04 - $53.62
Q3 2015	47,716	$2,340	$48.57	$46.28 - $50.54