ACK Asset Management LLC

CIK 0001510940 · Q2 2026

13F Equity AUM

$856.3M

+6.9% QoQ

Positions

+1 QoQ

AUM Rank

#3,692

Top 29%

Skill Alpha (FF)

+2.3%/yr^ns

No Clear Edge

Rank #1,269 · Top 15%

vs S&P +4.7%/yr (unadj.)

Quarters Tracked

~13 years

Portfolio Concentration

Top 5: 33.7%Top 10: 60.2%Top 20: 98.1%

WMS7.2%

HLIO7.1%

LFUS6.7%

JHX6.4%

GTX6.3%

CNM6.1%

EXP5.8%

ATS5.0%

ASTE4.9%

MTRN4.7%

Others (11)39.8%

HHI (Herfindahl-Hirschman Index) measures portfolio concentration. Low (<1500) = diversified, Moderate (1500-2500), High (>2500) = concentrated bets.

Sector Allocation

Industrials39.0%

Technology15.7%

Consumer Cyclical15.4%

Unclassified12.2%

Basic Materials10.5%

Energy7.2%

Portfolio weight by GICS sector based on latest 13F filing. Sectors below 2% are grouped as “Other.”

Position Sizing

Positions: 21Median: 4.65%Avg: 4.76%

0–0.5%

0(0.0%)

0.5–1%

0(0.0%)

1–3%

3(7.0%)

3–5%

10(42.4%)

5%+

8(50.6%)

Count of positions per weight bucket — (%) = combined portfolio weight

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Portfolio Overlap

Shared: 0Unique: 21vs 20 funds

0%Low

Fund positions

Consensus CUSIPs

Jaccard similarity of this fund’s portfolio vs the consensus of top 20 funds by AUM. Low (<15%) = contrarian, Moderate (15-40%), High (>40%) = follows the crowd.

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Position Changes This Quarter

New7Increased5Decreased5Exited6

New Positions

GTX6.3%

+1.5M

BWA4.7%

+600K

DNOW4.5%

+3.0M

ST3.4%

+600K

SHLS2.6%

+2.3M

EQPT2.4%

+1.1M

MEI1.9%

+878K

Increased

SWIM4.3%

+500K(+10%)

AERO-SWX3.3%

+253K(+30%)

CNM6.1%

+190K(+21%)

CLFD3.8%

+75K(+10%)

EXP5.8%

+55K(+33%)

Decreased

ATS5.0%

-346,196(-19%)

MTRN4.7%

-339,800(-72%)

HLIO7.1%

-99,378(-13%)

ASTE4.9%

-96,224(-12%)

LFUS6.7%

-10,000(-7%)

Exited

-475,000

-375,000

-260,000

-874,000

-250,000

-584,000

Quarter-over-quarter changes compared to prior 13F filing. New = first appearance; Exited = no longer held.

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Holdings

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