account_balance

Investment manager · 13F filer · SEC CIK 1580162

Chicago Capital Management, LLC

Reported value$110Mas of Sep 30, 2026
Positions26 13 new, 14 sold out
Top 10 weight61.4%ATKR alone is 9%
FiledOct 2121 days after quarter end

Portfolio · as of Sep 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
ATKR Atkore Inc 8.5% New
Rapid7 Inc 7.5% Added +31%
Lithium Argentina AG 6.4% New
The Realreal Inc 6.3% Added +42%
Veritone Inc 6.3% Added +27%
Enovis Corporation 5.7% New
MGP Ingredients Inc New 5.4% Held
Par Technology Corp 5.3% Added +444%
ITGR Integer Holdings Corp 5.0% New
HPEPRC Hewlett Packard Enterprise C 4.9% Held
Winnebago Inds Inc 4.8% New
Amphastar Pharmaceuticals In 4.6% Held

What changed

Biggest moves since Jun 30, 2026

Filed Oct 21, 2026, compared with the Jul 22, 2026 filing
add_circleNew
  • ATKR $9.43M
  • Lithium Argentina AG $7.03M
  • Enovis Corporation $6.34M
  • ITGR $5.53M
arrow_upwardAdded
  • Par Technology Corp +444%
  • The Realreal Inc +42%
  • Sarepta Therapeutics Inc +35%
  • Rapid7 Inc +31%
arrow_downwardTrimmed

None

remove_circleSold out
  • NUVL $11.1M
  • APGE $9.81M
  • GTLS $8.36M
  • Bandwidth Inc $7.62M

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. Daily closing prices come from post-no-preference/stocks on DoltHub, a community-run database shared under CC BY-SA 4.0; the prices we show stay under that license. They are each day's close, not live or official exchange prices.

This is data, not investment advice. About StockToast · Your watchlist