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Ack Asset Management LLC

CIK:0001510940
Hedge Fund
$609M AUM
21 holdings
Greenwich, CT, US
Founded:2005
10 employees
Latest filing:Jun 30, 2025

ACK Asset Management LLC is a U.S.-based hedge fund established in 2005 and headquartered in Greenwich, Connecticut. The firm specializes in asset management, offering investment strategies to institutional investors, primarily managing concentrated portfolios of U.S. equities. The company has a lean team of experienced professionals and is registered as an investment adviser with the SEC.

Investment Strategy

ACK Asset Management LLC focuses on concentrated, research-driven investment strategies in U.S. equities, targeting long/short positions among small- and mid-cap stocks. The investment approach emphasizes fundamental analysis, robust risk management, and deep due diligence to identify mispriced securities and outperform market benchmarks. The firm generally serves institutional clients and high-net-worth individuals.

Top Buys
A
AINAIN
+$41.0M
R
RRXRRX
+$39.9M
W
WMSWMS
+$39.6M
G
GVAGVA
+$36.6M
C
CTRICTRI
+$25.6M
Top Sells
R
ROGROGERS CORP
-$34.9M
M
MTZMTZ
-$32.7M
M
MBCMASTERBRAND INC
-$17.0M
B
BDT.TOBIRD CONSTRUCTION INC
-$17.0M
E
ENSENS
-$7.1M

Top Holdings

A
ATROATRO
+9.1%$69.0M
A
ATSATS
+7.7%$58.9M
D
DYDY
+7.2%$54.9M
G
GVAGVA
+6.7%$51.0M
E
ENSENS
+6.6%$50.1M

Equity Positions (19)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
A
ATRO
ATRO9.06%$69.0M2,060,000$14.23$33.48+$19.2M
A
ATS
ATS7.73%$58.9M1,846,196$32.72$31.88+$8.7M
D
DY
DY7.21%$54.9M224,700$115.09$244.39-$3.4M
G
GVA
GVA6.69%$51.0M545,000$81.87$93.51+$36.6M
E
ENS
ENS6.58%$50.1M584,324$73.35$85.77-$7.1M

Industry Allocation

WATER, SEWER, PIPELINE, COMM & POWER LINE CONSTRUCTION
+16.3%
AIRCRAFT PARTS & AUXILIARY EQUIPMENT, NEC
+9.1%
GENERAL INDUSTRIAL MACHINERY & EQUIPMENT, NEC
+7.7%
HEAVY CONSTRUCTION OTHER THAN BLDG CONST - CONTRACTORS
+6.7%
MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES
+6.6%