AMBARELLA INC

Ticker: AMBA CUSIP: G037AX101 Class: Common Stock

CENTRAL TRUST Co's Holding History (CIK: 0000044365)

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

Q4 2015

Shares 479 Value ($000) $27 Avg Close $56.36 Range $48.76 - $64.95

Q3 2015

Shares 179 Value ($000) $10 Avg Close $94.42 Range $53.76 - $129.19

Q2 2015

Shares 346 Value ($000) $36 Avg Close $87.40 Range $68.30 - $128.06

Q1 2015

Shares 346 Value ($000) $26 Avg Close $60.70 Range $48.50 - $77.39

Q4 2014

Shares 346 Value ($000) $18 Avg Close $46.72 Range $33.71 - $58.00

Q3 2014

Shares 584 Value ($000) $26 Avg Close $33.11 Range $27.40 - $46.78

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	479	$27	$56.36	$48.76 - $64.95
Q3 2015	179	$10	$94.42	$53.76 - $129.19
Q2 2015	346	$36	$87.40	$68.30 - $128.06
Q1 2015	346	$26	$60.70	$48.50 - $77.39
Q4 2014	346	$18	$46.72	$33.71 - $58.00
Q3 2014	584	$26	$33.11	$27.40 - $46.78