LUMINEX CORP DEL

CUSIP: 55027E102 Class: COMMON STOCK

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

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

Q4 2014
Shares 1,904,718 Value ($000) $35,733 Avg Close — Range —
Q3 2014
Shares 1,987,848 Value ($000) $38,763 Avg Close — Range —
Q2 2014
Shares 2,040,232 Value ($000) $34,990 Avg Close — Range —
Q1 2014
Shares 2,386,259 Value ($000) $43,215 Avg Close — Range —
Q4 2013
Shares 2,475,025 Value ($000) $48,015 Avg Close — Range —
Q3 2013
Shares 2,526,280 Value ($000) $50,526 Avg Close — Range —
Q2 2013
Shares 2,566,980 Value ($000) $52,905 Avg Close — Range —