Q3 2026 13F · SEC CIK 1580162
Chicago Capital Management, LLC
Hedge fundFiled 2026-10-21 for Q3 2026. Open the filing ↗ · All SEC filings ↗
- Reported 13F value
- $27.1M
- Reported positions
- 10
- Holdings vs S&P 500, 3 yrs
- —
- Assets under management
- $202.8M
Chicago Capital Management, LLC is a hedge fund that reported 10 positions worth $27.1M in its Q3 2026 13F, filed 2026-10-21. Its largest holdings were Atkore Inc (ATKR, 34.8%), Integer Hldgs Corp (ITGR, 20.4%), Hewlett Packard Enterprise C (19.9%).
Chicago Capital Management, LLC holdings all 10 positions.
Weights are shares of the filer's total reported 13F value, compared with Q2 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.
| Stock | % of 13F value | Share change | Reported value |
|---|---|---|---|
| ATKRAtkore Inc | 34.8% | — | $9.4M |
| ITGRInteger Hldgs Corp | 20.4% | — | $5.5M |
| 42824C208Hewlett Packard Enterprise C | 19.9% | +0.0% | $5.4M |
| HZOMarinemax Inc | 15.7% | — | $4.2M |
| 82452J307Shift4 Pmts Inc | 4.6% | — | $1.2M |
| SOMNSouthern Co | 1.7% | — | $452K |
| NSTSNsts Bancorp Inc | 1.2% | +0.0% | $315K |
| ACVAAcv Auctions Inc | 1.0% | — | $264K |
| BLFSBiolife Solutions Inc | 0.8% | — | $223K |
| XRXDWXerox Holdings Corp | 0.1% | +0.0% | $26K |
What Chicago Capital Management, LLC bought and sold in Q3 2026, against Q2 2026.
New positions
- ATKR Atkore Inc34.8% of 13F
- ITGR Integer Hldgs Corp20.4% of 13F
- HZO Marinemax Inc15.7% of 13F
- Shift4 Pmts Inc4.6% of 13F
- SOMN Southern Co1.7% of 13F
- ACVA Acv Auctions Inc1.0% of 13F
- BLFS Biolife Solutions Inc0.8% of 13F
Added to
No position grew by more than 5%.
Reduced
No position shrank by more than 5%.
Sold out
- NUVL Nuvalent Incwas 21.1%
- APGE Apogee Therapeutics Incwas 18.8%
- GTLS Chart Inds Incwas 16.0%
- TMHC Taylor Morrison Home Corpwas 13.7%
- CPRX Catalyst Pharmaceuticals Incwas 5.6%
- ALOT Astronova Incwas 5.5%
- ESPR Esperion Therapeutics Inc Newas 5.0%
- TECH Bio-Techne Corpwas 3.9%
Share counts compared with the Q2 2026 13F; a split also changes share counts.
How the holdings did against the S&P 500.
- 1 year
- —
- 3 years
- —
- 5 years
- —
A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.
Reported 13F value by quarter.
| Quarter | 13F value | Positions |
|---|---|---|
| Q3 2026 | $27.1M | 10 |
| Q2 2026 | $52.3M | 14 |
| Q1 2026 | $49.4M | 13 |
| Q4 2025 | $51.8M | 19 |
| Q3 2025 | $26.9M | 7 |
| Q2 2025 | $41.7M | 15 |
| Q1 2025 | $45.6M | 15 |
| Q4 2024 | $47.4M | 16 |
| Q3 2024 | $41.2M | 10 |
| Q2 2024 | $28.0M | 12 |
| Q1 2024 | $22.6M | 15 |
| Q4 2023 | $33.5M | 18 |
Questions about Chicago Capital Management, LLC's portfolio
What stocks does Chicago Capital Management, LLC own?
Chicago Capital Management, LLC's latest 13F, for Q3 2026 and filed Oct 21, 2026, lists 10 positions worth $27.1M. The largest are Atkore Inc (ATKR) at 34.8%, Integer Hldgs Corp (ITGR) at 20.4%, Hewlett Packard Enterprise C at 19.9%, Marinemax Inc (HZO) at 15.7% and Shift4 Pmts Inc at 4.6%.
What did Chicago Capital Management, LLC buy last quarter?
In Q3 2026, Chicago Capital Management, LLC added a new position in Atkore Inc (ATKR), a new position in Integer Hldgs Corp (ITGR), a new position in Marinemax Inc (HZO), a new position in Shift4 Pmts Inc and a new position in Southern Co (SOMN), compared with its Q2 2026 filing.
What did Chicago Capital Management, LLC sell last quarter?
In Q3 2026, Chicago Capital Management, LLC sold all of Nuvalent Inc (NUVL), sold all of Apogee Therapeutics Inc (APGE), sold all of Chart Inds Inc (GTLS), sold all of Taylor Morrison Home Corp (TMHC) and sold all of Catalyst Pharmaceuticals Inc (CPRX), compared with its Q2 2026 filing.
When is Chicago Capital Management, LLC's next 13F filing due?
13F filings are due 45 days after each quarter ends. Chicago Capital Management, LLC's filing for the quarter ending Dec 31, 2026 is due by Feb 14, 2027; this page updates the day after it is published.
How much money does Chicago Capital Management, LLC manage?
Chicago Capital Management, LLC reported $202.8M of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $27.1M.