PENUMBRA INC

Ticker: PEN CUSIP: 70975L107 Class: EQTY

FRONTIER CAPITAL MANAGEMENT CO LLC's Holding History (CIK: 0000351173)

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

Q4 2017

Shares 6,286 Value ($000) $592 Avg Close $99.19 Range $89.90 - $116.35

Q3 2017

Shares 48,220 Value ($000) $4,354 Avg Close $86.15 Range $77.75 - $90.50

Q2 2017

Shares 57,578 Value ($000) $5,052 Avg Close $84.93 Range $78.45 - $91.00

Q1 2017

Shares 35,889 Value ($000) $2,995 Avg Close $75.69 Range $63.05 - $84.85

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	6,286	$592	$99.19	$89.90 - $116.35
Q3 2017	48,220	$4,354	$86.15	$77.75 - $90.50
Q2 2017	57,578	$5,052	$84.93	$78.45 - $91.00
Q1 2017	35,889	$2,995	$75.69	$63.05 - $84.85