ILLUMINA INC

Ticker: ILMN CUSIP: 452327109 Class: COM

Rock Springs Capital Management LP's Holding History (CIK: 0001595725)

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

Q2 2015

Shares 17,750 Value ($000) $3,876 Avg Close $195.32 Range $173.81 - $217.00

Q1 2015

Shares 24,000 Value ($000) $4,455 Avg Close $188.35 Range $173.66 - $207.52

Q4 2014

Shares 30,500 Value ($000) $5,630 Avg Close $176.23 Range $141.17 - $191.99

Q3 2014

Shares 37,000 Value ($000) $6,065 Avg Close $167.17 Range $152.58 - $179.96

Q2 2014

Shares 43,000 Value ($000) $7,677 Avg Close $149.19 Range $124.21 - $175.88

Q1 2014

Shares 42,500 Value ($000) $6,318 Avg Close $146.95 Range $103.88 - $178.31

Q4 2013

Shares 55,250 Value ($000) $6,112 Avg Close $91.59 Range $70.79 - $111.87

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2015	17,750	$3,876	$195.32	$173.81 - $217.00
Q1 2015	24,000	$4,455	$188.35	$173.66 - $207.52
Q4 2014	30,500	$5,630	$176.23	$141.17 - $191.99
Q3 2014	37,000	$6,065	$167.17	$152.58 - $179.96
Q2 2014	43,000	$7,677	$149.19	$124.21 - $175.88
Q1 2014	42,500	$6,318	$146.95	$103.88 - $178.31
Q4 2013	55,250	$6,112	$91.59	$70.79 - $111.87