ACK Asset Management LLC

Q2 2026 13F-HR Holdings

Location
Greenwich, CT
Holdings as of
6/30/2026
Date filed
8/13/2026
Form type
13F-HR
Num holdings
21
Total value ($000)
$856,327
Net value change ($000)
+55,182 (6.9%)
New positions
7
Sold out positions
6
Turnover %
52.1%
Sector allocation + QoQ delta (equities-only)
Prev filing: 5/15/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q1 2026
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
GTX 54,345 NEW
BWA 39,840 NEW
DNOW 38,910 NEW
ST 28,644 NEW
SHLS 22,325 NEW
EQPT 20,935 NEW
EXP 18,241 58.4%
MEI 16,646 NEW
JHX 15,204 38.2%
CLFD 12,777 65.7%
Top Reduces (Value $000, Stocks/ETFs)
ROG -50,982 -100.0%
NOVT -44,291 -100.0%
DXPE -36,330 -100.0%
CDNL -34,658 -100.0%
GVA -29,970 -100.0%
MTRN -28,532 -41.5%
CTS -27,892 -100.0%
ATS -8,893 -17.1%
SITE -6,171 -14.0%
ASTE -107 -0.3%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type