Sign in

You're signed outSign in or to get full access.

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.

Latest 13F Filing Activity

Ack Asset Management LLC filed their most recent 13F report on Jun 30, 2025 disclosing 19 equity positions with a total 13F market value of $761M. The fund increased holdings in Ain, RRX, WMS among other positions. Ack Asset Management LLC reduced exposure to Rogers Corp., MTZ, Masterbrand Inc. among others.

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)
ATRO9.06%$69.0M2,060,000$14.23$33.48+$19.2M
ATS7.73%$58.9M1,846,196$32.72$31.88+$8.7M
DY7.21%$54.9M224,700$115.09$244.39-$3.4M
GVA6.69%$51.0M545,000$81.87$93.51+$36.6M
ENS6.58%$50.1M584,324$73.35$85.77-$7.1M

Industry Allocation

MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES
+8.3%
METAL FORGINGS & STAMPINGS
+7.9%
HEAVY CONSTRUCTION OTHER THAN BLDG CONST - CONTRACTORS
+7.5%
AIRCRAFT PARTS & AUXILIARY EQUIPMENT, NEC
+7.0%
PLASTICS FOAM PRODUCTS
+6.8%