Institutional Manager · CIK 0001387818
Barton Investment Management
WEST CONSHOHOCKEN, PA · File #028-12324
Latest AUM
$928.1M
Positions
52
Top-10 Concentration
85.4%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
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 |
|---|---|---|---|---|---|
| ADD | NETFLIX INC | NFLX | +2,129,406 | +$199.7M | -$267.8M |
| ADD | KLAVIYO INC | KVYO | +275,053 | +$8.9M | +$1.9M |
| REDUCE | SHOPIFY INC | SHOP | -44,363 | -$7.1M | +$20.8M |
| REDUCE | AIR LEASE CORP | AIIR | -69,971 | -$4.5M | +$274,486 |
| REDUCE | AMAZON COM INC | AMZN | -7,011 | -$1.6M | +$5.8M |
| REDUCE | APPLE INC | AAPL | -2,927 | -$795,734 | +$488,108 |
| REDUCE | MICROSOFT CORP | MSFT | -1,314 | -$635,477 | -$884,856 |
| REDUCE | EQUINIX INC | EQIX | -597 | -$457,398 | -$612,369 |
| ADD | BLUE OWL CAPITAL INC | OWL | +29,980 | +$447,901 | -$3.8M |
| REDUCE | PAYPAL HLDGS INC | PYPL | -6,954 | -$405,975 | -$1.1M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202552 pos · $928.1M
- 13F HOLDINGS REPORTQ/E Sep 202551 pos · $981.9M
- 13F HOLDINGS REPORTQ/E Jun 202548 pos · $965.1M
- 13F HOLDINGS REPORTQ/E Mar 202546 pos · $814.1M
- 13F HOLDINGS REPORTQ/E Dec 202448 pos · $942.8M
- 13F HOLDINGS REPORTQ/E Sep 202449 pos · $799.7M
- 13F HOLDINGS REPORTQ/E Jun 202443 pos · $751.7M
- 13F HOLDINGS REPORTQ/E Mar 202446 pos · $824.2M
- 13F HOLDINGS REPORTQ/E Dec 202345 pos · $619.3M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | SHOPIFY INC | SHOP | 1,640,426 | $264.1M | 28.46% |
| 2 | NETFLIX INC | NFLX | 2,371,717 | $222.4M | 23.97% |
| 3 | AMAZON COM INC | AMZN | 505,676 | $116.7M | 12.58% |
| 4 | GLOBAL E ONLINE LTD | GLBE | 1,079,254 | $42.4M | 4.57% |
| 5 | BLUE OWL CAPITAL INC | OWL | 1,950,164 | $29.1M | 3.14% |
| 6 | EQUINIX INC | EQIX | 35,256 | $27.0M | 2.91% |
| 7 | AIR LEASE CORP | AIIR | 403,246 | $25.9M | 2.79% |
| 8 | KLAVIYO INC | KVYO | 670,042 | $21.8M | 2.35% |
| 9 | OKTA INC | OKTA | 250,886 | $21.7M | 2.34% |
| 10 | GITLAB INC | GTLB | 558,603 | $21.0M | 2.26% |
| 11 | GFL ENVIRONMENTAL INC | GFL | 420,150 | $18.0M | 1.95% |
| 12 | AMERICAN TOWER CORP NEW | 03027X100 | 79,208 | $13.9M | 1.50% |
| 13 | MICROSOFT CORP | MSFT | 24,461 | $11.8M | 1.28% |
| 14 | ELECTRONIC ARTS INC | EA | 49,065 | $10.0M | 1.08% |
| 15 | BLACKLINE INC | BL | 160,204 | $8.9M | 0.95% |
| 16 | QUALCOMM INC | QCOM | 47,081 | $8.1M | 0.87% |
| 17 | BERKSHIRE HATHAWAY INC DEL | BRK-A | 10 | $7.5M | 0.81% |
| 18 | APPLE INC | AAPL | 25,402 | $6.9M | 0.74% |
| 19 | PAYPAL HLDGS INC | PYPL | 117,171 | $6.8M | 0.74% |
| 20 | ALPHABET INC | GOOG | 19,410 | $6.1M | 0.65% |