William John Sempolinski reported 63 positions worth $151.12M for the quarter ended Sep 30, 2026, up 5.3% on the prior quarter. It opened 3 new positions, added to 19, trimmed 27 and exited 6. Its largest holding is Nvidia Corp at 37.3% 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 |
|---|---|---|---|---|
| SPCX Space Exploration Technologies Corp | +6,832 | +167.9% | $1.03M | 1.09% |
| GLD Spdr Gold Trust | +2,478 | +300.4% | $943.72K | 0.832% |
| GRAL GRAIL, Inc. | +6,375 | +89.2% | $893.27K | 1.25% |
| RKLB Rocket Lab Corp | +7,275 | +28.2% | $506.92K | 1.53% |
| RVMD Revolution Medicines, Inc. | +1,900 | +102.7% | $389.99K | 0.509% |
| JNJ Johnson & Johnson | +1,400 | +65.7% | $370.64K | 0.619% |
| TWST Twist Bioscience Corp | +1,800 | – | $347.83K | 0.23% |
| TXG 10x Genomics, Inc. | +3,700 | – | $334.33K | 0.221% |
| AAPL Apple Inc. | +874 | +1.1% | $291.06K | 17.06% |
| AMD Advanced Micro Devices Inc | +469 | – | $287.21K | 0.19% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| NVDA Nvidia Corp | -4,925 | -2.0% | $1.12M | 37.3% |
| QS QuantumScape Corp | -191.0K | -94.6% | $887.15K | 0.034% |
| INTC Intel Corp | -4,850 | -100.0% | $677.21K | Exited |
| MSFT Microsoft Corp | -1,232 | -9.2% | $631.90K | 4.11% |
| AVGO Broadcom Inc. | -1,500 | -48.6% | $526.78K | 0.368% |
| GLW Corning Inc | -3,100 | -68.7% | $476.66K | 0.143% |
| ENB Enbridge Inc | -7,500 | -100.0% | $406.58K | Exited |
| ASML Asml Holding Nv | -210 | -29.6% | $380.45K | 0.599% |
| CFG Citizens Financial Group Inc | -4,350 | -34.7% | $277.36K | 0.345% |
| CRWV CoreWeave, Inc. | -2,550 | -100.0% | $253.83K | Exited |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| INTC Intel Corp | -4,850 | $677.21K | 0.472% |
| ENB Enbridge Inc | -7,500 | $406.58K | 0.283% |
| CRWV CoreWeave, Inc. | -2,550 | $253.83K | 0.177% |
| IRM Iron Mountain Inc | -1,900 | $239.99K | 0.167% |
| CARR CARRIER GLOBAL Corp | -3,057 | $224.23K | 0.156% |
| GD General Dynamics Corp | -600 | $212.54K | 0.148% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | NVDA Nvidia Corp | Technology | 246.9K | $56.38M | 37.3% | -4,925 | -2.0% | Reduced | 0% |
| 2 | AAPL Apple Inc. | Technology | 77.4K | $25.78M | 17.06% | +874 | +1.1% | Added | 0% |
| 3 | GOOGL Alphabet Inc. | Technology | 22.0K | $7.58M | 5.01% | +511 | +2.4% | Added | 0% |
| 4 | AMZN Amazon Com Inc | Consumer Discretionary | 25.9K | $6.46M | 4.27% | -200 | -0.8% | Reduced | 0% |
| 5 | MSFT Microsoft Corp | Technology | 12.1K | $6.21M | 4.11% | -1,232 | -9.2% | Reduced | 0% |
| 6 | META Meta Platforms, Inc. | Technology | 5,415 | $3.93M | 2.6% | -100 | -1.8% | Reduced | 0% |
| 7 | JXN Jackson Financial Inc. | Financial Services | 21.6K | $2.79M | 1.85% | -100 | -0.5% | Reduced | 0.03% |
| 8 | RKLB Rocket Lab Corp | Industrials | 33.1K | $2.30M | 1.53% | +7,275 | +28.2% | Added | 0.01% |
| 9 | SHW Sherwin Williams Co | Basic Materials | 6,833 | $2.21M | 1.46% | -300 | -4.2% | Reduced | 0% |
| 10 | BRK-B Berkshire Hathaway Inc | Financial Services | 3,810 | $1.90M | 1.26% | +300 | +8.5% | Added | 0% |
| 11 | GRAL GRAIL, Inc. | Healthcare | 13.5K | $1.90M | 1.25% | +6,375 | +89.2% | Added | 0.03% |
| 12 | O Realty Income Corp | Real Estate | 31.3K | $1.70M | 1.12% | 0 | 0.0% | Unchanged | 0% |
| 13 | SPCX Space Exploration Technologies Corp | Industrials | 10.9K | $1.64M | 1.09% | +6,832 | +167.9% | Added | 0% |
| 14 | GOOG Alphabet Inc. | Technology | 4,584 | $1.56M | 1.03% | 0 | 0.0% | Unchanged | 0% |
| 15 | TSM Taiwan Semiconductor Manufacturing Co Ltd | Technology | 3,235 | $1.48M | 0.977% | -125 | -3.7% | Reduced | 0% |
Tip. Select a row to see that position’s full history at William John Sempolinski.
As of its Q3 2026 13F filing, William John Sempolinski’s five largest positions were Nvidia Corp (NVDA) at 37.3%, Apple Inc. (AAPL) at 17.1%, Alphabet Inc. (GOOGL) at 5.0%, Amazon Com Inc (AMZN) at 4.3%, Microsoft Corp (MSFT) at 4.1% of the reported portfolio.
William John Sempolinski reported a 13F portfolio worth $151.12M across 63 positions for Q3 2026. That is up 5.3% from the previous quarter.
Its largest purchases by value were Space Exploration Technologies Corp ($1.03M), Spdr Gold Trust ($943.72K), GRAIL, Inc. ($893.27K). It opened 3 new positions.
Its largest sales by value were Nvidia Corp ($1.12M), QuantumScape Corp ($887.15K), Intel Corp ($677.21K). It exited 6 positions entirely.
From the Form 13F-HR reports William John Sempolinski 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.