Grizzlyrock Capital, LLC
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), Grizzlyrock Capital, LLC reported 23 stock positions worth $128.8 million. Its top holding was Ferroglobe (GSM) at 14.7% of the portfolio, followed by Genesis Energy (GEL, 8.2%) and Amn Healthcare Services (AMN, 8.1%). Compared with Q2 2025, it opened 4 new positions, sold out of 2, added to 7 and reduced 8. The biggest buy was a new position in Olin (OLN) and the biggest sale Magnite (MGNI, shares −60%).
- Most Recent 13F
- Q2 2026
- Location
- CHICAGO, IL
- CIK
- 0002011732
- Portfolio Value
- $128.8M (Q3 2025)
- SEC Filing
- 0001214659-25-016622 ↗ filed Nov 14, 2025
Holdings Value
Holdings 23 stocks · $128.8M
| GSM Ferroglobe PLC | 14.68% | 4,153,545 | $18.9M | Reduce -8.5% |
| GEL Genesis Energy L.P. | 8.18% | 630,346 | $10.5M | No change |
| AMN Amn Healthcare Services Inc. | 8.08% | 537,526 | $10.4M | Add +88.5% |
| DRVN Driven Brands Holdings Inc. | 7.65% | 611,298 | $9.8M | Reduce -9.8% |
| MGNI Magnite Inc. | 6.61% | 390,906 | $8.5M | Reduce -59.9% |
| DAR Darling Ingredients Inc. | 6.32% | 263,700 | $8.1M | Add +0.4% |
| OLN Olin Corp. | 5.88% | 303,000 | $7.6M | New |
| TDW Tidewater Inc. | 5.43% | 131,190 | $7.0M | Reduce -2.2% |
| AMTM Amentum Holdings Inc. | 5.27% | 283,113 | $6.8M | Add +11.7% |
| PRGO Perrigo Co. PLC | 5.22% | 301,745 | $6.7M | No change |
| RYZ Ryerson Holding Corp. | 5.20% | 293,096 | $6.7M | New |
| ACVA Acv Auctions Inc. Class A | 4.76% | 618,505 | $6.1M | New |
| LFCR Lifecore Biomedical Inc. | 4.22% | 738,882 | $5.4M | Add +0.6% |
| ROG Rogers Corp. | 4.11% | 65,794 | $5.3M | Add +206.0% |
| MATW Matthews Intl Corp. Class A | 2.51% | 133,075 | $3.2M | Add +26.4% |
| GRFS Grifols SA-ADR | 1.61% | 208,000 | $2.1M | Add +25.3% |
| EEFT Euronet Worldwide Inc. | 1.37% | 20,100 | $1.8M | New |
| OEC Orion SA | 1.21% | 206,280 | $1.6M | No change |
| XPER Xperi Inc. | 0.80% | 159,300 | $1.0M | Reduce -82.9% |
| IAS Integral Ad Science Holding | 0.48% | 61,250 | $623K | Reduce -88.3% |
| EFXT Enerflex Ltd. | 0.20% | 24,000 | $259K | No change |
| OPAL Opal Fuels Inc. Class A | 0.14% | 81,500 | $179K | Reduce -90.3% |
| HOS Hornbeck Offshore Services I filed as HELIX ENERGY SOLUTIONS GRP I | 0.05% | 10,000 | $66K | Reduce -96.9% |
Portfolio Sells Q2 2025 → Q3 2025
| MGNI Magnite Inc. | Reduce -59.9% | 6.61% | −11.06 |
| XPER Xperi Inc. | Reduce -82.9% | 0.80% | −4.75 |
| IAS Integral Ad Science Holding | Reduce -88.3% | 0.48% | −2.79 |
| GPRE Green Plains Inc. | Sold out | 0.00% | −2.54 |
| HOS Hornbeck Offshore Services I | Reduce -96.9% | 0.05% | −1.48 |
| OPAL Opal Fuels Inc. Class A | Reduce -90.3% | 0.14% | −1.40 |
| DRVN Driven Brands Holdings Inc. | Reduce -9.8% | 7.65% | −1.30 |
| AMBP Ardagh Metal Packaging SA | Sold out | 0.00% | −0.72 |
| TDW Tidewater Inc. | Reduce -2.2% | 5.43% | +0.78 |
| GSM Ferroglobe PLC | Reduce -8.5% | 14.68% | +2.15 |
Portfolio Buys Q2 2025 → Q3 2025
| OLN Olin Corp. | New | 5.88% | +5.88 |
| RYZ Ryerson Holding Corp. | New | 5.20% | +5.20 |
| ACVA Acv Auctions Inc. Class A | New | 4.76% | +4.76 |
| AMN Amn Healthcare Services Inc. | Add +88.5% | 8.08% | +3.65 |
| ROG Rogers Corp. | Add +206.0% | 4.11% | +3.00 |
| EEFT Euronet Worldwide Inc. | New | 1.37% | +1.37 |
| AMTM Amentum Holdings Inc. | Add +11.7% | 5.27% | +0.77 |
| MATW Matthews Intl Corp. Class A | Add +26.4% | 2.51% | +0.62 |
| GRFS Grifols SA-ADR | Add +25.3% | 1.61% | +0.48 |
| LFCR Lifecore Biomedical Inc. | Add +0.6% | 4.22% | −0.26 |
| DAR Darling Ingredients Inc. | Add +0.4% | 6.32% | −1.17 |
Options Activity Q2 2025 → Q3 2025
| IWM iShares Russell 2000 ETF | put | Sold out | 64,000 | $13.8Mbefore exit |
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 20 | $143.0M | MGNI, EEFT, AMN, GSM, REAL BROKERAGE INC/THE |
| Q1 2026 | 18 | $126.3M | GSM, DRVN, MGNI, AMN, OLN |
| Q4 2025 | 22 | $133.6M | GSM, GEL, EEFT, MGNI, AMN |
| Q3 2025 | 23 | $128.8M | GSM, GEL, AMN, DRVN, MGNI |
| Q2 2025 | 21 | $133.0M | MGNI, GSM, DRVN, GEL, DAR |
| Q1 2025 | 21 | $110.3M | GSM, DRVN, MGNI, GEL, PRGO |
| Q4 2024 | 17 | $95.8M | GSM, DRVN, MGNI, XPER, PRGO |
| Q3 2024 | 18 | $116.0M | GSM, DRVN, MGNI, CASH, PRGO |
| Q2 2024 | 19 | $120.3M | GSM, DRVN, MGNI, CASH, CLMT |
| Q1 2024 | 20 | $121.9M | GSM, OEC, GPRE, CASH, AMBP |