MAIRS & POWER INC

Position in AMBA — Ambarella Inc

CIK 1070134 St Paul, MN

Position in AMBA

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$10,841,087

+$4,788,018 QoQ

Shares Held

126,353

+7.5% QoQ

Ownership

0.288%

of shares outstanding

% of Portfolio

0.10%

of 13F equity value

Holder Rank

#42

of 336 holders

Holding Since

Mar 2026

2 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Technology · as of Jun 30, 2026

MAIRS & POWER INC holds $253,243,615 across 4 Semiconductor Equipment & Materials names. AMBA ranks #2 (4.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ENTG	Entegris Inc	1,301,640	$234,112,970
2	AMBA	Ambarella Inc This page	126,353	$10,841,087
3	AMAT	Applied Materials Inc /De	11,007	$7,958,061
4	LRCX	Lam Research Corp	765	$331,497

2 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$10,841,087	126,353	+7.5%	Shares	Sole	2026-08-14
2026-03-31	$6,053,069	117,581	—	Shares	Sole	2026-05-14
No filing history on record for this holder in this stock.