13FBOX
ACK Asset Management LLC · 13F Holdings
Options Calculator Rankings

ACK Asset Management LLC

No.3072 Data as of 2026Q2
Latest AUM (Q2 2026)
$856.3M
QoQ Change Q1 2026
+$55.2M+6.9%
Holdings
21
New Buys
7
Adds
5
Reduces
5
Exits
6
Unchanged
4
Holdings Value Trend
Holdings by Sector
Stock Ownership TrendPortfolio %Prev Q %Q2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
ADVANCED DRAIN SYS INC DELWMS
7.15%6.68%$61.2M390,000$53.5M390,00000.00%Unchanged
HELIOS TECHNOLOGIES INCHLIO
7.1%6.3%$60.8M681,000$50.5M780,378-99,378-12.73%Reduce
LITTELFUSE INCLFUS
6.65%5.72%$56.9M125,000$45.8M135,000-10,000-7.41%Reduce
JAMES HARDIE INDS PLC ORD SHSJHX
6.42%4.96%$55.0M2.1M$39.8M2.1M00.00%Unchanged
GGARRETT MOTION INCGTX
6.35%$54.3M1.5M$00+1.5MNew Buy
CORE & MAIN INCCNM
6.14%5.55%$52.6M1.1M$44.5M900,000+190,000+21.11%Add
EAGLE MATLS INCEXP
5.78%3.9%$49.5M220,000$31.3M165,000+55,000+33.33%Add
AAts Corporation. Ordinary SharesATS
5.04%6.5%$43.2M1.5M$52.1M1.8M-346,196-18.75%Reduce
AASTEC INDS INCASTE
4.93%5.29%$42.2M690,276$42.3M786,500-96,224-12.23%Reduce
MATERION CORPMTRN
4.69%8.57%$40.1M135,000$68.7M474,800-339,800-71.57%Reduce
BORGWARNER INCBWA
4.65%$39.8M600,000$00+600,000New Buy
DDNOW INCDNOW
4.54%$38.9M3.0M$00+3.0MNew Buy
MMASTERBRAND INCMBC
4.45%3.84%$38.1M3.7M$30.7M3.7M00.00%Unchanged
SSITEONE LANDSCAPE SUPPLY INCSITE
4.41%5.48%$37.8M330,000$43.9M330,00000.00%Unchanged
LATHAM GROUP INCSWIM
4.28%3.46%$36.6M5.7M$27.7M5.2M+500,000+9.69%Add
CCLEARFIELD INCCLFD
3.76%2.43%$32.2M810,200$19.5M735,200+75,000+10.20%Add
SENSATA TECHNOLOGIES HLDG PLST
3.34%$28.6M600,000$00+600,000New Buy
AAERO-SWX
3.32%3.35%$28.5M1.1M$26.8M830,000+252,500+30.42%Add
SSHOALS TECHNOLOGIES GROUP INSHLS
2.61%$22.3M2.3M$00+2.3MNew Buy
EEQUIPMENTSHARE COM INCEQPT
2.44%$20.9M1.1M$00+1.1MNew Buy
MMETHODE ELECTRS INC COMMEI
1.94%$16.6M877,500$00+877,500New Buy

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow