Institutional Manager · CIK 0001845565
Greenstone Partners & Co., LLC
Larkspur, CA · File #028-20697
Latest AUM
$514.4M
Positions
12
Top-10 Concentration
98.6%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-12
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | APPLOVIN CORP | APP | -149,000 | -$100.4M | -$15.4M |
| ADD | SOMNIGROUP INTERNATIONAL INC | SGI | +253,757 | +$22.7M | +$1.3M |
| ADD | PAR TECHNOLOGY CORP | PAR | +380,885 | +$13.8M | -$2.1M |
| ADD | VESTIS CORPORATION | VSTS | +1,945,931 | +$13.0M | +$6.7M |
| ADD | APPFOLIO INC | APPF | +54,833 | +$12.8M | -$5.7M |
| ADD | GUIDEWIRE SOFTWARE INC | GWRE | +60,000 | +$12.1M | -$3.6M |
| NEW | GCI LIBERTY INC | GLIBK | +315,282 | +$11.7M | $0 |
| ADD | LIBERTY BROADBAND CORP | LBRDP | +223,742 | +$10.9M | -$8.2M |
| REDUCE | CHARTER COMMUNICATIONS INC N | 16119P108 | -23,050 | -$4.8M | -$1.8M |
| ADD | XPO INC | XPO | +3,281 | +$445,921 | +$1.3M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202511 pos · $546.9M
- 13F HOLDINGS REPORTQ/E Dec 202512 pos · $514.4M
- 13F HOLDINGS REPORTQ/E Jun 202511 pos · $426.8M
- 13F HOLDINGS REPORTQ/E Mar 202510 pos · $376.7M
- 13F HOLDINGS REPORTQ/E Dec 20249 pos · $426.2M
- 13F HOLDINGS REPORTQ/E Sep 20249 pos · $286.6M
- 13F HOLDINGS REPORTQ/E Jun 20249 pos · $239.4M
- 13F HOLDINGS REPORTQ/E Mar 20249 pos · $222.8M
- 13F HOLDINGS REPORTQ/E Dec 20239 pos · $151.1M
Top 11 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | APPLOVIN CORP | APP | 344,251 | $247.4M | 45.23% |
| 2 | ACUITY BRANDS INC | AYI | 192,880 | $66.4M | 12.15% |
| 3 | PROCORE TECHNOLOGIES INC | PCOR | 522,802 | $38.1M | 6.97% |
| 4 | APPFOLIO INC | APPF | 132,776 | $36.6M | 6.69% |
| 5 | LIBERTY BROADBAND CL C | LBRDP | 547,890 | $34.8M | 6.37% |
| 6 | GUIDEWIRE SOFTWARE INC | GWRE | 125,956 | $29.0M | 5.29% |
| 7 | PAR TECHNOLOGY CORP | PAR | 638,426 | $25.3M | 4.62% |
| 8 | XPO INC | XPO | 190,422 | $24.6M | 4.50% |
| 9 | SOMNIGROUP INTERNATIONAL | SGI | 272,017 | $22.9M | 4.19% |
| 10 | VESTIS | VSTS | 3,148,425 | $14.3M | 2.61% |
| 11 | CHARTER COMMUNICATIONS INC CL A | 16119P108 | 27,408 | $7.5M | 1.38% |