CIK: 0001387818
Total reported value
$797.3M
Reporting period: 2026-03-31 · Number of holdings: 54
Barton Investment Management disclosed 54 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $797.3M and a quarterly turnover rate of 18.2%.
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Barton Investment Management's disclosed holdings carry a Herfindahl concentration index of 0.161 — mathematically equivalent to about 6 equally-sized positions, well below its 54 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.80), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Trim SHOP
-2.3% -$73.9M
Add NFLX
-1.2% $2.9M
Add EQIX
-6.9% $5.2M
Trim OWL
+4.6% -$10.5M
Trim GTLB
-0.7% -$9.0M
Add AMZN
-1.7% -$13.2M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | NFLX | Netflix INC | Stock-Comm Services | 28.25% | +4.29% | -1.21% | |
| 2 | SHOP | Shopify INC - Class A | Stock-Tech | 23.85% | -4.60% | -2.28% | |
| 3 | AMZN | Amazon.com INC | Stock-Consumer Disc | 12.99% | +0.41% | -1.67% | |
| 4 | GLBE | Global-E Online Ltd. | Stock-Other | 4.21% | -0.36% | +0.83% | |
| 5 | EQIX | Equinix INC | Stock-Real Estate | 4.04% | +1.13% | -6.85% | |
| 6 | AL | Air Lease CORP | Stock-Other | 2.77% | -0.02% | -15.68% | |
| 7 | KVYO | Klaviyo Inc-a | Stock-Other | 2.56% | +0.22% | +56.71% | |
| 8 | OWL | Blue Owl Capital INC | Stock-Financials | 2.34% | -0.80% | +4.64% | |
| 9 | OKTA | Okta INC | Stock-Tech | 2.24% | -0.10% | -9.69% | |
| 10 | GFL | Gfl Environmental Inc-sub Vt | Stock-Other | 2.19% | +0.25% | -0.16% | |
| 11 | AMT | American Tower CORP | Stock-Real Estate | 1.70% | +0.20% | -0.98% | |
| 12 | GTLB | Gitlab Inc-cl A | Stock-Tech | 1.51% | -0.75% | -0.66% | |
| 13 | MSFT | Microsoft CORP | Stock-Tech | 1.13% | -0.14% | -0.18% | |
| 14 | EA | Electronic Arts INC | Stock-Comm Services | 1.12% | +0.04% | -10.94% | |
| 15 | BRK-A | Berkshire Hathaway Inc-cl A | Stock-Other | 0.90% | +0.09% | — | |
| 16 | AAPL | Apple INC | Stock-Tech | 0.79% | +0.05% | -2.13% | |
| 17 | BL | Blackline INC | Stock-Tech | 0.74% | -0.21% | -0.97% | |
| 18 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 0.69% | +0.04% | -0.85% | |
| 19 | BRK-B | Berkshire Hathaway Inc. | Stock-Other | 0.62% | +0.05% | -2.01% | |
| 20 | PYPL | Paypal Holdings INC | Stock-Financials | 0.61% | -0.14% | -8.98% | |
| 21 | QCOM | Qualcomm INC | Stock-Tech | 0.59% | -0.28% | -21.84% | |
| 22 | JNJ | Johnson & Johnson | Stock-Healthcare | 0.44% | +0.11% | -4.15% | |
| 23 | VTI | Vanguard Total Stock Mkt ETF | ETF-Other | 0.43% | +0.04% | -1.26% | |
| 24 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 0.38% | +0.02% | — | |
| 25 | TBLL | Invesco Short Term Treasury | ETF-Gov Bonds | 0.27% | +0.27% | NEW | |
| 26 | SYM | Symbotic INC | Stock-Industrials | 0.25% | +0.05% | +20.08% | |
| 27 | ABBV | Abbvie INC | Stock-Healthcare | 0.21% | -0.03% | -21.18% | |
| 28 | VGSH | Vanguard Short-term Treasury | ETF-Gov Bonds | 0.19% | +0.02% | -2.46% | |
| 29 | TROW | T Rowe Price Group INC | Stock-Financials | 0.19% | +0.01% | — | |
| 30 | XOM | Exxon Mobil CORP | Stock-Energy | 0.18% | +0.02% | -33.73% | |
| 31 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 0.13% | +0.03% | — | |
| 32 | MRK | Merck & Co. INC. | Stock-Healthcare | 0.12% | +0.03% | — | |
| 33 | RPRX | Royalty Pharma plc | Stock-Healthcare | 0.11% | +0.11% | NEW | |
| 34 | DASH | Doordash INC - A | Stock-Consumer Disc | 0.11% | -0.04% | — | |
| 35 | ORCL | Oracle CORP | Stock-Tech | 0.11% | -0.01% | — | |
| 36 | ABT | Abbott Laboratories | Stock-Healthcare | 0.10% | -0.03% | -20.58% | |
| 37 | ADBE | Adobe INC | Stock-Tech | 0.10% | -0.02% | — | |
| 38 | NVDA | Nvidia CORP | Stock-Tech | 0.08% | — | -8.72% | |
| 39 | DIS | Walt Disney Co/the | Stock-Comm Services | 0.08% | — | — | |
| 40 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 0.07% | — | — | |
| 41 | BILL | Bill Holdings INC | Stock-Tech | 0.07% | -0.02% | -6.19% | |
| 42 | VRT | Vertiv Holdings Co-a | Stock-Industrials | 0.07% | +0.03% | -5.66% | |
| 43 | AXP | American Express Co | Stock-Financials | 0.06% | — | -1.23% | |
| 44 | QXO | Qxo INC | Stock-Industrials | 0.05% | +0.05% | NEW | |
| 45 | SCHX | Schwab US Large-cap ETF | ETF-Other | 0.05% | — | — | |
| 46 | CSCO | Cisco Systems INC | Stock-Tech | 0.05% | +0.01% | +19.11% | |
| 47 | META | Meta Platforms Inc-class A | Stock-Comm Services | 0.05% | -0.01% | -19.26% | |
| 48 | WMT | Walmart INC | Stock-Consumer Staples | 0.04% | — | — | |
| 49 | NTRS | Northern Trust CORP | Stock-Financials | 0.04% | — | — | |
| 50 | AVGO | Broadcom INC | Stock-Tech | 0.04% | — | — |
Performance for Q3 2026
-8.4%
Performance Last 4 Quarters
-9.7%
Based on 84% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 54 | $797.3M | 18 | |
| 2025-12-31 | 52 | $928.1M | 13 | |
| 2025-09-30 | 51 | $981.9M | 22 | |
| 2025-06-30 | 48 | $965.1M | 0 | |
| 2025-03-31 | 46 | $814.1M | 100 | |
| 2024-12-31 | 48 | $942.8M | 0 | |
| 2024-09-30 | 49 | $799.7M | 0 | |
| 2024-06-30 | 43 | $751.7M | 0 | |
| 2024-03-31 | 46 | $824.2M | 0 | |
| 2023-12-31 | 47 | $762.6M | 0 | |
| 2023-09-30 | 45 | $619.3M | 0 | |
| 2023-06-30 | 44 | $665.8M | 0 | |
| 2023-03-31 | 42 | $568.5M | 0 | |
| 2022-12-31 | 43 | $508.7M | 0 | |
| 2022-09-30 | 41 | $491.6M | 0 | |
| 2022-06-30 | 41 | $494.8M | 0 | |
| 2022-03-31 | 41 | $789.4M | 0 | |
| 2021-12-31 | 43 | $1.2B | 0 | |
| 2021-09-30 | 40 | $1.2B | 0 | |
| 2021-06-30 | 41 | $1.2B | 94 | |
| 2021-03-31 | 39 | $1.1B | 12 | |
| 2020-12-31 | 40 | $1.2B | 13 | |
| 2020-09-30 | 41 | $1.0B | 8 | |
| 2020-06-30 | 40 | $983.3M | 42 | |
| 2020-03-31 | 39 | $645.0M | 12 | |
| 2019-12-31 | 42 | $643.8M | 19 | |
| 2019-09-30 | 38 | $596.6M | 16 | |
| 2019-06-30 | 40 | $669.1M | 12 | |
| 2019-03-31 | 40 | $599.1M | 24 | |
| 2018-12-31 | 41 | $500.6M | 27 | |
| 2018-09-30 | 41 | $646.2M | 13 | |
| 2018-06-30 | 41 | $618.1M | 15 | |
| 2018-03-31 | 40 | $542.3M | 22 | |
| 2017-12-31 | 41 | $455.5M | 12 | |
| 2017-09-30 | 42 | $421.8M | 17 | |
| 2017-06-30 | 42 | $378.9M | 13 | |
| 2017-03-31 | 43 | $343.9M | 17 | |
| 2016-12-31 | 41 | $300.6M | 49 | |
| 2016-09-30 | 43 | $297.0M | 14 | |
| 2016-06-30 | 45 | $274.8M | 30 | |
| 2016-03-31 | 53 | $364.6M | 46 | |
| 2015-12-31 | 102 | $304.9M | 17 | |
| 2015-09-30 | 45 | $275.3M | 40 | |
| 2015-06-30 | 46 | $282.6M | 43 | |
| 2015-03-31 | 45 | $271.3M | 16 | |
| 2014-12-31 | 45 | $261.2M | 21 | |
| 2014-09-30 | 46 | $261.4M | 10 | |
| 2014-06-30 | 47 | $255.8M | 16 | |
| 2014-03-31 | 45 | $244.5M | 13 | |
| 2013-12-31 | 49 | $249.8M | 15 | |
| 2013-09-30 | 50 | $221.2M | 17 | |
| 2013-06-30 | 51 | $193.4M | 0 |
Barton Investment Management's most significant position changes for 2026-03-31: New buy: Invesco Short Term Treasury (TBLL); New buy: Royalty Pharma plc (RPRX); New buy: Qxo INC (QXO); Sold out: THE Cigna Group (CI); New buy: Analog Devices INC (ADI).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | NFLX | Netflix INC | +4.3% | -1.21% | Trim |
| 2 | EQIX | Equinix INC | +1.1% | -6.85% | Trim |
| 3 | AMZN | Amazon.com INC | +0.4% | -1.67% | Trim |
| 4 | GFL | Gfl Environmental Inc-sub Vt | +0.3% | -0.16% | Trim |
| 5 | KVYO | Klaviyo Inc-a | +0.2% | +56.71% | Add |
| 6 | AMT | American Tower CORP | +0.2% | -0.98% | Trim |
| 7 | JNJ | Johnson & Johnson | +0.1% | -4.15% | Trim |
| 8 | BRK-A | Berkshire Hathaway Inc-cl A | +0.1% | — | Unchanged |
| 9 | AAPL | Apple INC | +0.1% | -2.13% | Trim |
| 10 | BRK-B | Berkshire Hathaway Inc. | +0.1% | -2.01% | Trim |
| 11 | SYM | Symbotic INC | +0.1% | +20.08% | Add |
| 12 | EA | Electronic Arts INC | 0% | -10.94% | Trim |
| 13 | GOOGL | Alphabet Inc-cl A | 0% | -0.85% | Trim |
| 14 | VTI | Vanguard Total Stock Mkt ETF | 0% | -1.26% | Trim |
| 15 | VRT | Vertiv Holdings Co-a | 0% | -5.66% | Trim |
| 16 | COST | Costco Wholesale CORP | 0% | — | Unchanged |
| 17 | MRK | Merck & Co. INC. | 0% | — | Unchanged |
| 18 | GOOG | Alphabet Inc-cl C | 0% | — | Unchanged |
| 19 | XOM | Exxon Mobil CORP | 0% | -33.73% | Trim |
| 20 | VGSH | Vanguard Short-term Treasury | 0% | -2.46% | Trim |
| 21 | TROW | T Rowe Price Group INC | 0% | — | Unchanged |
| 22 | CSCO | Cisco Systems INC | 0% | +19.11% | Add |
| 23 | AXP | American Express Co | — | -1.23% | Trim |
| 24 | NVDA | Nvidia CORP | — | -8.72% | Trim |
| 25 | DIS | Walt Disney Co/the | — | — | Unchanged |
| 26 | ADP | Automatic Data Processing | — | — | Unchanged |
| 27 | AVGO | Broadcom INC | — | — | Unchanged |
| 28 | ORCL | Oracle CORP | 0% | — | Unchanged |
| 29 | META | Meta Platforms Inc-class A | 0% | -19.26% | Trim |
| 30 | AL | Air Lease CORP | 0% | -15.68% | Trim |
| 31 | ADBE | Adobe INC | 0% | — | Unchanged |
| 32 | BILL | Bill Holdings INC | 0% | -6.19% | Trim |
| 33 | ABBV | Abbvie INC | 0% | -21.18% | Trim |
| 34 | ABT | Abbott Laboratories | 0% | -20.58% | Trim |
| 35 | DASH | Doordash INC - A | 0% | — | Unchanged |
| 36 | OKTA | Okta INC | -0.1% | -9.69% | Trim |
| 37 | MSFT | Microsoft CORP | -0.1% | -0.18% | Trim |
| 38 | PYPL | Paypal Holdings INC | -0.1% | -8.98% | Trim |
| 39 | BL | Blackline INC | -0.2% | -0.97% | Trim |
| 40 | QCOM | Qualcomm INC | -0.3% | -21.84% | Trim |
| 41 | GLBE | Global-E Online Ltd. | -0.4% | +0.83% | Add |
| 42 | GTLB | Gitlab Inc-cl A | -0.8% | -0.66% | Trim |
| 43 | OWL | Blue Owl Capital INC | -0.8% | +4.64% | Add |
| 44 | SHOP | Shopify INC - Class A | -4.6% | -2.28% | Trim |
| 45 | TBLL | Invesco Short Term Treasury | — | NEW | New buy |
| 46 | RPRX | Royalty Pharma plc | — | NEW | New buy |
| 47 | QXO | Qxo INC | — | NEW | New buy |
| 48 | CI | THE Cigna Group | — | EXIT | Sold out |
| 49 | ADI | Analog Devices INC | — | NEW | New buy |
| 50 | TWLO | Twilio INC - A | — | EXIT | Sold out |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-04-20 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-01-21 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-10-21 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-07-21 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-04-11 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-01-27 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-10-17 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-07-18 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-04-26 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-01-24 | Amendment | View on EDGAR |
| 2023-12-31 | 2024-01-23 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-10-16 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-07-24 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-04-18 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-01-26 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-10-20 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-07-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-04-20 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-01-18 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-10-18 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-07-26 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-04-16 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-01-13 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-10-19 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-17 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-04-30 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-01-22 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-10-16 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-07-18 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-04-24 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-01-22 | Amendment | View on EDGAR |
| 2018-12-31 | 2019-01-16 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-10-23 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-07-18 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-04-18 | Amendment | View on EDGAR |
| 2018-03-31 | 2018-04-17 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-01-18 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-10-30 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-07-25 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-04-26 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-01-24 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-08 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-03 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-04-28 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-08 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-06 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-18 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-07 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-06 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-14 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-11 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-08 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-11 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-07 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-09 | 13F-HR | View on EDGAR |
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