CIK: 0001845565
Total reported value
$395.1M
Reporting period: 2026-03-31 · Number of holdings: 9
Greenstone Partners & Co., LLC disclosed 9 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $395.1M and a quarterly turnover rate of 55.3%.
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Greenstone Partners & Co., LLC's disclosed holdings carry a Herfindahl concentration index of 0.131 — mathematically equivalent to about 8 equally-sized positions, close to its 9 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.44), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
Recent activity leans toward adding more aggressively to already-large existing positions than to newly initiated ones (a 6.5 percentage-point tilt) — a pattern consistent with a momentum-following approach.
Add CHTR
+3896.3% $36.7M
Add GWRE
+117.4% $23.1M
Trim APP
0.0% -$53.9M
Trim XPO
-85.7% -$20.9M
Add VSTS
0.0% $6.1M
Add APPF
+45.8% -$483.9K
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | APP | Applovin Corp-class A | Stock-Tech | 19.67% | -5.90% | — | |
| 2 | GWRE | Guidewire Software INC | Stock-Tech | 15.31% | +8.04% | +117.43% | |
| 3 | AYI | Acuity INC | Stock-Industrials | 12.75% | -0.75% | -6.83% | |
| 4 | APPF | Appfolio INC - A | Stock-Tech | 10.93% | +2.45% | +45.78% | |
| 5 | SGI | Somnigroup International INC | Stock-Consumer Disc | 10.63% | +1.51% | +8.10% | |
| 6 | VSTS | Vestis CORP | Stock-Other | 10.14% | +3.53% | — | |
| 7 | PCOR | Procore Technologies INC | Stock-Tech | 9.70% | +2.31% | +28.62% | |
| 8 | CHTR | Charter Communications Inc-a | Stock-Comm Services | 9.52% | +9.34% | +3896.28% | |
| 9 | XPO | Xpo INC | Stock-Industrials | 1.36% | -3.76% | -85.69% |
Performance for Q3 2026
+9.4%
Performance Last 4 Quarters
+9.7%
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 9 | $395.1M | 55 | |
| 2025-12-31 | 12 | $514.4M | 40 | |
| 2025-09-30 | 11 | $546.9M | 77 | |
| 2025-06-30 | 11 | $426.8M | 0 | |
| 2025-03-31 | 10 | $376.7M | 100 | |
| 2024-12-31 | 9 | $426.2M | 0 | |
| 2024-09-30 | 9 | $286.6M | 0 | |
| 2024-06-30 | 9 | $239.4M | 0 | |
| 2024-03-31 | 9 | $222.8M | 0 | |
| 2023-12-31 | 9 | $179.0M | 0 | |
| 2023-09-30 | 9 | $151.1M | 0 | |
| 2023-06-30 | 10 | $146.2M | 0 | |
| 2023-03-31 | 11 | $132.2M | 0 | |
| 2022-12-31 | 10 | $106.9M | 0 | |
| 2022-09-30 | 10 | $99.5M | 0 | |
| 2022-06-30 | 10 | $93.8M | 0 | |
| 2022-03-31 | 10 | $116.5M | 0 | |
| 2021-12-31 | 11 | $138.0M | 0 | |
| 2021-09-30 | 12 | $133.0M | 0 | |
| 2021-06-30 | 10 | $132.7M | 94 | |
| 2021-03-31 | 10 | $118.6M | 13 | |
| 2020-12-31 | 10 | $116.5M | 0 |
Greenstone Partners & Co., LLC's most significant position changes for 2026-03-31: Sold out: Liberty Broadband-c (LBRDK); Sold out: Par Technology Corp/del (PAR); Sold out: Liberty Capital Corp-cl C (GLIBK); Add: Charter Communications Inc-a (CHTR) — shares +3896.28%; Add: Guidewire Software INC (GWRE) — shares +117.43%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | CHTR | Charter Communications Inc-a | +9.3% | +3896.28% | Add |
| 2 | GWRE | Guidewire Software INC | +8% | +117.43% | Add |
| 3 | VSTS | Vestis CORP | +3.5% | — | Unchanged |
| 4 | APPF | Appfolio INC - A | +2.5% | +45.78% | Add |
| 5 | PCOR | Procore Technologies INC | +2.3% | +28.62% | Add |
| 6 | SGI | Somnigroup International INC | +1.5% | +8.10% | Add |
| 7 | AYI | Acuity INC | -0.8% | -6.83% | Trim |
| 8 | XPO | Xpo INC | -3.8% | -85.69% | Trim |
| 9 | APP | Applovin Corp-class A | -5.9% | — | Unchanged |
| 10 | LBRDK | Liberty Broadband-c | — | EXIT | Sold out |
| 11 | PAR | Par Technology Corp/del | — | EXIT | Sold out |
| 12 | GLIBK | Liberty Capital Corp-cl C | — | EXIT | Sold out |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-14 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-18 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2026-02-25 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-14 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-14 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-14 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-13 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-09 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-13 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-13 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-10 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-06 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-13 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-12 | 13F-HR | View on EDGAR |
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