SUPERNUS PHARMACEUTICALS INC

Ticker: SUPN CUSIP: 868459108 Class: EQTY

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q2 2018

Shares 184,848 Value ($000) $11,063 Avg Close $51.80 Range $43.53 - $61.25

Q1 2018

Shares 234,424 Value ($000) $10,737 Avg Close $41.73 Range $34.90 - $48.65

Q4 2017

Shares 254,697 Value ($000) $10,150 Avg Close $39.52 Range $33.30 - $43.25

Q3 2017

Shares 191,736 Value ($000) $7,669 Avg Close $43.28 Range $36.16 - $50.05

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	184,848	$11,063	$51.80	$43.53 - $61.25
Q1 2018	234,424	$10,737	$41.73	$34.90 - $48.65
Q4 2017	254,697	$10,150	$39.52	$33.30 - $43.25
Q3 2017	191,736	$7,669	$43.28	$36.16 - $50.05