Amtech Systems, Inc. (ASYS)

Accumulating

Strong institutional accumulation: ownership increased +7.59% quarter-over-quarter.

Data as of Q1 2026

Institutional Ownership

50.82%

QoQ Change

+7.59%

Total Value

$79.6B

Shares Outstanding

14.5M

Crowding AnalysisCrowded

Holders75of 5,944

Avg: 68

Uncrowded85th percentileCrowded

Institutional Activity

Buy/Sell Ratio1.7x

67th percentile

51 buying30 selling

+22

New

-9

Closed

+1.2M

Net shares

Holding Period Distribution

estimate

Median: 2 QAvg: 2.2 QHolders: 75

Ownership Concentration

Top 5: 38.6%Top 10: 63.0%

First Eagle Investment Management,11.3%

VANGUARD CAPITAL MANAGEMENT7.7%

DIMENSIONAL FUND ADVISORS7.2%

ACADIAN ASSET MANAGEMENT6.3%

MILLENNIUM MANAGEMENT6.2%

Others (70)61.4%

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Conviction-Weighted Ownership

Median weight: 0.00%Avg weight: 0.11%Max: 1.03%High conviction (>1%): 1

First Eagle Investment Management,

VANGUARD CAPITAL MANAGEMENT

DIMENSIONAL FUND ADVISORS

ACADIAN ASSET MANAGEMENT

MILLENNIUM MANAGEMENT

MARSHALL WACE, LLP

Pacific Ridge Capital Partners,

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

JANE STREET GROUP,

TWO SIGMA INVESTMENTS,

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Whale Moves Timeline (8 Quarters)

Biggest dollar-value position changes among top 10 holders

NEWVANGUARD CAPITAL MANAGEMENT$7M564K shr

NEWMILLENNIUM MANAGEMENT$5M454K shr

NEWTWO SIGMA INVESTMENTS$3M267K shr

SOLDPacific Ridge Capital Partners$3M222K shr

SOLDDIMENSIONAL FUND ADVISORS$2M143K shr

BOUGHTACADIAN ASSET MANAGEMENT$1.9B152K shr

BOUGHTMARSHALL WACE, LLP$3M247K shr

NEWSUSQUEHANNA INTERNATIONAL GROUP, LLP$3M216K shr

SOLDDIMENSIONAL FUND ADVISORS$2M178K shr

BOUGHTARROWSTREET CAPITAL, LIMITED PARTNERSHIP$2M165K shr

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Institutional Trends (8 Quarters)

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Institutional Holders

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