Greenstone Partners & Co., LLC
In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 18, 2026), Greenstone Partners & Co., LLC reported 12 stock positions worth $514.4 million. Its top holding was AppLovin Class A (APP) at 25.6% of the portfolio, followed by Acuity (AYI, 13.5%) and Somnigroup International (SGI, 9.1%). Compared with Q3 2025, it opened 1 new position, added to 7 and reduced 2. The biggest buy was Somnigroup International (SGI, shares +93%) and the biggest sale AppLovin Class A (APP, shares −43%).
- Most Recent 13F
- Q2 2026
- Location
- LARKSPUR, CA
- CIK
- 0001845565
- Portfolio Value
- $514.4M (Q4 2025)
- SEC Filing
- 0001941040-26-000189 ↗ filed Feb 18, 2026
Holdings Value
Holdings 12 stocks · $514.4M
| APP AppLovin Corp. Class A | 25.57% | 195,251 | $131.6M | Reduce -43.3% |
| AYI Acuity Inc. | 13.50% | 192,880 | $69.4M | No change |
| SGI Somnigroup International Inc. | 9.12% | 525,774 | $46.9M | Add +93.3% |
| APPF Appfolio Inc. Class A | 8.48% | 187,609 | $43.6M | Add +41.3% |
| PCOR Procore Technologies Inc. | 7.39% | 522,802 | $38.0M | No change |
| LBRDK Liberty Broadband-C | 7.29% | 771,632 | $37.5M | Add +40.8% |
| GWRE Guidewire Software Inc. | 7.27% | 185,956 | $37.4M | Add +47.6% |
| PAR Par Technology Corp. | 7.19% | 1,019,311 | $37.0M | Add +59.7% |
| VSTS Vestis Corp. | 6.61% | 5,094,356 | $34.0M | Add +61.8% |
| XPO Xpo Inc. | 5.12% | 193,703 | $26.3M | Add +1.7% |
| GLIBK Liberty Capital Corp. Class C filed as GCI LIBERTY INC | 2.28% | 315,282 | $11.7M | New |
| CHTR Charter Communications Inc. Class A | 0.18% | 4,358 | $910K | Reduce -84.1% |
Portfolio Sells Q3 2025 → Q4 2025
Portfolio Buys Q3 2025 → Q4 2025
| SGI Somnigroup International Inc. | Add +93.3% | 9.12% | +4.93 |
| VSTS Vestis Corp. | Add +61.8% | 6.61% | +4.00 |
| PAR Par Technology Corp. | Add +59.7% | 7.19% | +2.57 |
| GLIBK Liberty Capital Corp. Class C | New | 2.28% | +2.28 |
| GWRE Guidewire Software Inc. | Add +47.6% | 7.27% | +1.97 |
| APPF Appfolio Inc. Class A | Add +41.3% | 8.48% | +1.79 |
| LBRDK Liberty Broadband-C | Add +40.8% | 7.29% | +0.92 |
| XPO Xpo Inc. | Add +1.7% | 5.12% | +0.62 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 8 | $432.6M | APP, VSTS, AYI, GWRE, SGI |
| Q1 2026 | 9 | $395.1M | APP, GWRE, AYI, APPF, SGI |
| Q4 2025 | 12 | $514.4M | APP, AYI, SGI, APPF, PCOR |
| Q3 2025 | 11 | $546.9M | APP, AYI, PCOR, APPF, LBRDK |
| Q2 2025 | 11 | $426.8M | APP, AYI, CHTR, PAR, SCHW |
| Q1 2025 | 10 | $376.7M | APP, CHTR, AYI, PAR, SCHW |
| Q4 2024 | 9 | $426.2M | APP, PAR, AYI, GWRE, APPF |
| Q3 2024 | 9 | $286.6M | APP, GWRE, AYI, PAR, APPF |
| Q2 2024 | 9 | $239.4M | APP, APPF, PAR, AYI, GWRE |
| Q1 2024 | 9 | $222.8M | APP, AYI, APPF, PCOR, GWRE |