WILLIS GROUP HOLDINGS PUBLIC

CUSIP: G96666105 Class: SHS

PRIMECAP MANAGEMENT CO/CA/'s Holding History (CIK: 0000763212)

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

Q3 2015
Shares 348,200 Value ($000) $14,266 Avg Close — Range —
Q2 2015
Shares 348,200 Value ($000) $16,331 Avg Close — Range —
Q1 2015
Shares 348,200 Value ($000) $16,776 Avg Close — Range —
Q4 2014
Shares 2,035,659 Value ($000) $91,218 Avg Close — Range —
Q3 2014
Shares 3,151,851 Value ($000) $130,487 Avg Close — Range —
Q2 2014
Shares 4,039,351 Value ($000) $174,904 Avg Close — Range —
Q1 2014
Shares 4,116,651 Value ($000) $181,668 Avg Close — Range —
Q4 2013
Shares 4,172,951 Value ($000) $186,990 Avg Close — Range —
Q3 2013
Shares 4,225,585 Value ($000) $183,095 Avg Close — Range —
Q2 2013
Shares 4,325,085 Value ($000) $176,377 Avg Close — Range —