Latest ACK Asset Management LLC Stock Portfolio

ACK Asset Management LLC Performance:

2025 Q3: 11.12%YTD: 21.2%2024: 10.52%

Performance for 2025 Q3 is 11.12%, and YTD is 21.2%, and 2024 is 10.52%.

About ACK Asset Management LLC and 13F Hedge Fund Stock Holdings

In it's latest 13F Holdings report, ACK Asset Management LLC reported an equity portfolio of $799.1 Millions as of 30 Sep, 2025.

The top stock holdings of ACK Asset Management LLC are ENS, MTRN, GVA. The fund has invested 8.3% of it's portfolio in ENS and 7.9% of portfolio in MTRN.

The fund managers got completely rid off DY (DY), MYRG (MYRG) and RRX (RRX) stocks. They significantly reduced their stock positions in ATRO (ATRO) and CTRI. ACK Asset Management LLC opened new stock positions in CNM (CNM), JHX and HLIO (HLIO). The fund showed a lot of confidence in some stocks as they added substantially to AIN (AIN), NPKI (NR) and WMS (WMS).

ACK Asset Management LLC Annual Return Estimates Vs S&P 500

Our best estimate is that ACK Asset Management LLC made a return of 11.12% in the last quarter. In trailing 12 months, it's portfolio return was 19.55%.

New Buys

Ticker	$ Bought
cnm	48,447,000
jhx	40,341,000
hlio	40,140,100
aste	33,763,200
apog	30,847,600
mbc	30,291,000
exp	20,973,600

New stocks bought by ACK Asset Management LLC

Additions

Ticker	% Inc.
ain	29.91
npki	28.53
wms	13.04
site	12.00
ctos	2.67

Additions to existing portfolio by ACK Asset Management LLC

Reductions

Ticker	% Reduced
atro	-40.29
ctri	-32.33

ACK Asset Management LLC reduced stake in above stock

Sold off

Ticker	$ Sold
mrc	-31,080,600
mir	-28,785,600
mtrx	-14,686,700
rrx	-39,864,000
myrg	-48,120,500
dy	-54,914,400
mtz	-21,303,800
dxpe	-6,626,340

ACK Asset Management LLC got rid off the above stocks

Sector Distribution

ACK Asset Management LLC has about 60.9% of it's holdings in Industrials sector.

Sector	%
Industrials	60.9
Others	18.5
Basic Materials	10.6
Consumer Cyclical	5.1
Technology	2.7
Energy	2.2

Market Cap. Distribution

ACK Asset Management LLC has about 6.8% of it's portfolio invested in the large-cap and mega-cap stocks.

Category	%
MID-CAP	48.1
SMALL-CAP	26.6
UNALLOCATED	18.5
LARGE-CAP	6.8

Stocks belong to which Index?

About 61.5% of the stocks held by ACK Asset Management LLC either belong to S&P 500 or RUSSELL 2000 index.

Index	%
RUSSELL 2000	61.5
Others	38.5

Top 5 Winners (%)		%
MTRN	mtrn	52.2 %
ATRO	atro	36.2 %
ENS	ens	31.7 %
CTOS	ctos	29.0 %
NR	npki	23.9 %

Top 5 Winners ($)		$
ATRO	atro	25.0 M
MTRN	mtrn	21.7 M
ENS	ens	15.9 M
GVA	gva	8.8 M
WMS	wms	8.2 M

Top 5 Losers (%)		%
CLFD	clfd	-20.8 %
AIN	ain	-19.6 %

Top 5 Losers ($)		$
AIN	ain	-9.8 M
CLFD	clfd	-5.6 M

ACK Asset Management LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of ACK Asset Management LLC

ACK Asset Management LLC has 20 stocks in it's portfolio. About 65.9% of the portfolio is in top 10 stocks. AIN proved to be the most loss making stock for the portfolio. ATRO was the most profitable stock for ACK Asset Management LLC last quarter.

Last Reported on: 14 Nov, 2025

Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change
AIN	ain	5.07	760,000	40,508,000	added	29.91

APOG	apog	3.86	708,000	30,847,600	new

ASTE	aste	4.22	701,500	33,763,200	new

ATRO	atro	7.02	1,230,000	56,100,300	reduced	-40.29

CLFD	clfd	2.69	625,200	21,494,400	unchanged	0.00

CNM	cnm	6.06	900,000	48,447,000	new

CTOS	ctos	1.55	1,925,000	12,358,500	added	2.67

DXPE	dxpe	0.00	0.00	0.00	sold off	-100

DY	dy	0.00	0.00	0.00	sold off	-100

ENS	ens	8.26	584,324	66,005,200	unchanged	0.00

EXP	exp	2.62	90,000	20,973,600	new

GVA	gva	7.48	545,000	59,759,200	unchanged	0.00

HLIO	hlio	5.02	770,000	40,140,100	new

JBT	jbtm	6.16	350,546	49,234,200	unchanged	0.00

MIR	mir	0.00	0.00	0.00	sold off	-100

MRC	mrc	0.00	0.00	0.00	sold off	-100

MTRN	mtrn	7.93	524,800	63,401,100	unchanged	0.00

MTRX	mtrx	0.00	0.00	0.00	sold off	-100

MTZ	mtz	0.00	0.00	0.00	sold off	-100

MYRG	myrg	0.00	0.00	0.00	sold off	-100