USANA HEALTH SCIENCES INC

Ticker: USNA CUSIP: 90328M107 Class: Common Stock

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

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

Q4 2016

Shares 103,244 Value ($000) $6,319 Avg Close $65.15 Range $58.80 - $75.00

Q3 2016

Shares 52,492 Value ($000) $7,262 Avg Close $65.96 Range $54.27 - $71.48

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	103,244	$6,319	$65.15	$58.80 - $75.00
Q3 2016	52,492	$7,262	$65.96	$54.27 - $71.48