Barton Investment Management reported 50 positions worth $796.15M for the quarter ended Sep 30, 2026, up 10.6% on the prior quarter. It opened 0 new positions, added to 10, trimmed 19 and exited 2. Its largest holding is Shopify Inc. at 28% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| GTLB Gitlab Inc. | +93.2K | +19.4% | $4.40M | 3.4% |
| RPRX Royalty Pharma plc | +57.0K | +189.7% | $3.33M | 0.638% |
| SYM Symbotic Inc. | +40.3K | +75.3% | $1.69M | 0.495% |
| KVYO Klaviyo, Inc. | +93.9K | +7.5% | $1.48M | 2.67% |
| MSFT Microsoft Corp | +380 | +1.6% | $194.90K | 1.6% |
| OWL Blue Owl Capital Inc. | +3,297 | +0.2% | $29.97K | 2.41% |
| CSCO Cisco Systems, Inc. | +180 | +3.5% | $19.37K | 0.071% |
| NVDA Nvidia Corp | +75 | +1.9% | $17.13K | 0.113% |
| QXO QXO, Inc. | +175 | +0.6% | $2.05K | 0.041% |
| PFE Pfizer Inc | +12 | +0.1% | $342.23 | 0.034% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| SHOP Shopify Inc. | -79.3K | -5.0% | $11.76M | 27.96% |
| GLBE Global-E Online Ltd. | -83.8K | -7.7% | $3.33M | 5.02% |
| AMZN Amazon Com Inc | -12.1K | -2.5% | $3.01M | 14.86% |
| NFLX Netflix Inc | -26.3K | -1.2% | $1.83M | 19.73% |
| OKTA Okta, Inc. | -8,302 | -3.9% | $1.74M | 5.41% |
| BL Blackline, Inc. | -48.8K | -38.7% | $1.29M | 0.257% |
| DASH DoorDash, Inc. | -6,000 | -100.0% | $1.11M | Exited |
| EQIX Equinix Inc | -882 | -2.8% | $892.21K | 3.94% |
| PYPL PayPal Holdings, Inc. | -13.4K | -13.5% | $704.32K | 0.565% |
| AMT American Tower Corp | -2,126 | -2.8% | $348.00K | 1.54% |
No new positions this quarter.
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | SHOP Shopify Inc. | Technology | 1.50M | $222.64M | 27.96% | -79.3K | -5.0% | Reduced | 0.12% |
| 2 | NFLX Netflix Inc | Technology | 2.26M | $157.07M | 19.73% | -26.3K | -1.2% | Reduced | 0.05% |
| 3 | AMZN Amazon Com Inc | Consumer Discretionary | 474.8K | $118.29M | 14.86% | -12.1K | -2.5% | Reduced | 0% |
| 4 | OKTA Okta, Inc. | Technology | 206.0K | $43.07M | 5.41% | -8,302 | -3.9% | Reduced | 0.12% |
| 5 | GLBE Global-E Online Ltd. | Technology | 1.01M | $39.95M | 5.02% | -83.8K | -7.7% | Reduced | 0.59% |
| 6 | EQIX Equinix Inc | Technology | 31.0K | $31.38M | 3.94% | -882 | -2.8% | Reduced | 0.03% |
| 7 | GTLB Gitlab Inc. | Technology | 573.7K | $27.11M | 3.4% | +93.2K | +19.4% | Added | 0.35% |
| 8 | KVYO Klaviyo, Inc. | Technology | 1.35M | $21.24M | 2.67% | +93.9K | +7.5% | Added | 1.03% |
| 9 | OWL Blue Owl Capital Inc. | Financial Services | 2.11M | $19.18M | 2.41% | +3,297 | +0.2% | Added | 0.3% |
| 10 | GFL GFL Environmental Inc. | Industrials | 408.1K | $17.07M | 2.14% | -7,459 | -1.8% | Reduced | 0.11% |
| 11 | MSFT Microsoft Corp | Technology | 24.8K | $12.72M | 1.6% | +380 | +1.6% | Added | 0% |
| 12 | AMT American Tower Corp | Real Estate | 74.9K | $12.26M | 1.54% | -2,126 | -2.8% | Reduced | 0.02% |
| 13 | AAPL Apple Inc. | Technology | 24.5K | $8.17M | 1.03% | -330 | -1.3% | Reduced | 0% |
| 14 | BRK-A Berkshire Hathaway Inc | Financial Services | 10 | $7.47M | 0.938% | 0 | 0.0% | Unchanged | 0% |
| 15 | QCOM Qualcomm Inc | Technology | 38.0K | $6.99M | 0.878% | -77 | -0.2% | Reduced | 0% |
Tip. Select a row to see that position’s full history at Barton Investment Management.
As of its Q3 2026 13F filing, Barton Investment Management’s five largest positions were Shopify Inc. (SHOP) at 28.0%, Netflix Inc (NFLX) at 19.7%, Amazon Com Inc (AMZN) at 14.9%, Okta, Inc. (OKTA) at 5.4%, Global-E Online Ltd. (GLBE) at 5.0% of the reported portfolio.
Barton Investment Management reported a 13F portfolio worth $796.15M across 50 positions for Q3 2026. That is up 10.6% from the previous quarter.
Its largest purchases by value were Gitlab Inc. ($4.40M), Royalty Pharma plc ($3.33M), Symbotic Inc. ($1.69M). It opened 0 new positions.
Its largest sales by value were Shopify Inc. ($11.76M), Global-E Online Ltd. ($3.33M), Amazon Com Inc ($3.01M). It exited 2 positions entirely.
From the Form 13F-HR reports Barton Investment Management files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.