account_balance

Investment manager · 13F filer · SEC CIK 1510940

ACK Asset Management LLC

Reported value$856Mas of Jun 30, 2026
Positions21 7 new, 6 sold out
Top 10 weight60.2%WMS alone is 7%
FiledAug 1344 days after quarter end

Portfolio · as of Jun 30, 2026

Where the money is

New or addedTrimmedHeld

Boxes show the top 12 stocks, sized against each other. The bar above shows how much of the fund they are. 13F only covers US-listed stocks, so foreign holdings and short positions are missing.

Show the top 12 as a list
WMS 7.1% HeldHLIO Hlio 7.1% Trimmed −13%LFUS Lfus 6.6% Trimmed −7%JHX 6.4% HeldGTX 6.3% NewCNM 6.1% Added +21%EXP Exp 5.8% Added +33%ATS Ats 5.0% Trimmed −19%ASTE Aste 4.9% Trimmed −12%MTRN 4.7% Trimmed −72%BWA Bwa 4.7% NewDNOW Dnow 4.5% New

What changed

Biggest moves since Mar 31, 2026

Filed Aug 13, 2026, compared with the May 15, 2026 filing
add_circleNew
arrow_upwardAdded
arrow_downwardTrimmed
remove_circleSold out

Where this data comes from. Insider trades, fund holdings, activist stakes and company results come from public SEC EDGAR filings (Forms 4, 13F, 13D/13G, 10-Q and 8-K). Congress trades come from the STOCK Act reports members file with the House Clerk and the Senate.

This is data, not investment advice. About StockToast