O'Brien Greene & Co. Inc reported 110 positions worth $318.98M for the quarter ended Sep 30, 2026, down 2.4% on the prior quarter. It opened 6 new positions, added to 14, trimmed 31 and exited 6. Its largest holding is Interactive Brokers Group, Inc. at 6.5% 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 |
|---|---|---|---|---|
| CLMT Calumet, Inc. | +11.5K | – | $602.37K | 0.189% |
| UUUU Energy Fuels Inc | +42.0K | – | $463.26K | 0.145% |
| GEO Geo Group Inc | +14.0K | – | $426.58K | 0.134% |
| NET Cloudflare, Inc. | +750 | – | $260.46K | 0.082% |
| XOM ExxonMobil Holdings Corp | +1,600 | +44.1% | $260.40K | 0.267% |
| PCB Pcb Bancorp | +9,000 | +38.2% | $246.42K | 0.279% |
| TDW Tidewater Inc | +2,961 | – | $240.14K | 0.075% |
| ROST Ross Stores, Inc. | +894 | – | $208.66K | 0.065% |
| KOS Kosmos Energy Ltd. | +69.7K | +77.4% | $176.96K | 0.127% |
| SONY Sony Group Corp | +5,790 | +2.3% | $136.24K | 1.92% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| HONA Honeywell Aerospace Inc. | -26.1K | -100.0% | $5.78M | Exited |
| WMT Walmart Inc. | -42.3K | -41.7% | $4.40M | 1.93% |
| BSX Boston Scientific Corp | -92.8K | -93.2% | $4.05M | 0.093% |
| TLN Talen Energy Corp | -2,646 | -100.0% | $1.02M | Exited |
| VLO Valero Energy Corp | -1,642 | -3.4% | $636.46K | 5.71% |
| SNEX StoneX Group Inc. | -9,313 | -21.8% | $601.99K | 0.677% |
| PHYS Sprott Physical Gold Trust | -16.8K | -2.8% | $525.71K | 5.63% |
| EVC Entravision Communications Corp | -52.2K | -65.3% | $383.84K | 0.064% |
| IBKR Interactive Brokers Group, Inc. | -3,793 | -1.5% | $324.00K | 6.46% |
| SOLS Solstice Advanced Materials Inc. | -3,500 | -100.0% | $310.10K | Exited |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| HONA Honeywell Aerospace Inc. | -26.1K | $5.78M | 1.77% |
| TLN Talen Energy Corp | -2,646 | $1.02M | 0.311% |
| SOLS Solstice Advanced Materials Inc. | -3,500 | $310.10K | 0.095% |
| ET Energy Transfer LP | -13.8K | $263.30K | 0.081% |
| SHMD SCHMID Group N.V. | -35.0K | $219.10K | 0.067% |
| TJX Tjx Companies Inc | -1,362 | $206.34K | 0.063% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | IBKR Interactive Brokers Group, Inc. | Financial Services | 241.3K | $20.61M | 6.46% | -3,793 | -1.5% | Reduced | 0.05% |
| 2 | AAPL Apple Inc. | Technology | 54.9K | $18.30M | 5.74% | -350 | -0.6% | Reduced | 0% |
| 3 | VLO Valero Energy Corp | Energy | 47.0K | $18.21M | 5.71% | -1,642 | -3.4% | Reduced | 0.02% |
| 4 | PHYS Sprott Physical Gold Trust | Others | 574.3K | $17.96M | 5.63% | -16.8K | -2.8% | Reduced | 0.13% |
| 5 | BRK-B Berkshire Hathaway Inc | Financial Services | 27.3K | $13.61M | 4.27% | -519 | -1.9% | Reduced | 0% |
| 6 | AMGN Amgen Inc | Healthcare | 29.6K | $12.49M | 3.91% | -317 | -1.1% | Reduced | 0.01% |
| 7 | FNV FRANCO NEVADA Corp | Financial Services | 48.1K | $11.44M | 3.59% | -486 | -1.0% | Reduced | 0.02% |
| 8 | EOG Eog Resources Inc | Energy | 81.5K | $11.23M | 3.52% | -2,094 | -2.5% | Reduced | 0.02% |
| 9 | MSFT Microsoft Corp | Technology | 21.6K | $11.08M | 3.47% | -337 | -1.5% | Reduced | 0% |
| 10 | UNP Union Pacific Corp | Industrials | 40.5K | $11.03M | 3.46% | -531 | -1.3% | Reduced | 0.01% |
| 11 | WMB Williams Companies, Inc. | Energy | 154.5K | $10.50M | 3.29% | -2,676 | -1.7% | Reduced | 0.01% |
| 12 | CBOE Cboe Global Markets, Inc. | Financial Services | 37.4K | $10.29M | 3.22% | -725 | -1.9% | Reduced | 0.04% |
| 13 | NTR Nutrien Ltd. | Basic Materials | 131.6K | $9.25M | 2.9% | -1,583 | -1.2% | Reduced | 0.03% |
| 14 | DHR Danaher Corp | Healthcare | 39.7K | $8.80M | 2.76% | -681 | -1.7% | Reduced | 0.01% |
| 15 | CSCO Cisco Systems, Inc. | Technology | 80.3K | $8.64M | 2.71% | -1,905 | -2.3% | Reduced | 0% |
Tip. Select a row to see that position’s full history at O'Brien Greene.
As of its Q3 2026 13F filing, O'Brien Greene & Co. Inc’s five largest positions were Interactive Brokers Group, Inc. (IBKR) at 6.5%, Apple Inc. (AAPL) at 5.7%, Valero Energy Corp (VLO) at 5.7%, Sprott Physical Gold Trust (PHYS) at 5.6%, Berkshire Hathaway Inc (BRK-B) at 4.3% of the reported portfolio.
O'Brien Greene & Co. Inc reported a 13F portfolio worth $318.98M across 110 positions for Q3 2026. That is down 2.4% from the previous quarter.
Its largest purchases by value were Calumet, Inc. ($602.37K), Energy Fuels Inc ($463.26K), Geo Group Inc ($426.58K). It opened 6 new positions.
Its largest sales by value were Honeywell Aerospace Inc. ($5.78M), Walmart Inc. ($4.40M), Boston Scientific Corp ($4.05M). It exited 6 positions entirely.
From the Form 13F-HR reports O'Brien Greene & Co. Inc 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.