JAT Capital Mgmt LP reported 15 positions worth $47.02M for the quarter ended Jun 30, 2026, down 20.8% on the prior quarter. It opened 9 new positions, added to 1, trimmed 5 and exited 4. Its largest holding is Western Digital Corp at 29.2% 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 |
|---|---|---|---|---|
| WDC Western Digital Corp | +21.5K | – | $13.73M | 29.21% |
| ORCL Oracle Corp | +51.6K | – | $7.56M | 16.07% |
| HOOD Robinhood Markets, Inc. | +51.4K | – | $5.15M | 10.96% |
| IREN IREN Ltd | +53.5K | – | $2.45M | 5.2% |
| AAOI Applied Optoelectronics, Inc. | +16.5K | +164.6% | $2.44M | 8.35% |
| STX Seagate Technology Holdings plc | +1,390 | – | $1.34M | 2.85% |
| MRVL Marvell Technology, Inc. | +3,485 | – | $1.04M | 2.21% |
| NOW ServiceNow, Inc. | +8,000 | – | $794.24K | 1.69% |
| SPCX Space Exploration Technologies Corp | +4,500 | – | $768.87K | 1.64% |
| VST Vistra Corp. | +2,500 | – | $396.58K | 0.843% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| MU Micron Technology Inc | -28.9K | -86.3% | $33.37M | 11.26% |
| COHR Coherent Corp. | -32.8K | -86.8% | $12.96M | 4.19% |
| META Meta Platforms, Inc. | -21.6K | -97.7% | $12.17M | 0.607% |
| AMZN Amazon Com Inc | -46.7K | -97.4% | $11.13M | 0.634% |
| NVDA Nvidia Corp | -54.0K | -100.0% | $9.42M | Exited |
| CEG Constellation Energy Corp | -7,500 | -100.0% | $2.09M | Exited |
| CORZ Core Scientific, Inc. | -65.3K | -100.0% | $976.48K | Exited |
| INTC Intel Corp | -20.8K | -100.0% | $919.45K | Exited |
| LITE Lumentum Holdings Inc. | -650 | -21.7% | $557.74K | 4.29% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| WDC Western Digital Corp | +21.5K | $13.73M | 29.21% |
| ORCL Oracle Corp | +51.6K | $7.56M | 16.07% |
| HOOD Robinhood Markets, Inc. | +51.4K | $5.15M | 10.96% |
| IREN IREN Ltd | +53.5K | $2.45M | 5.2% |
| STX Seagate Technology Holdings plc | +1,390 | $1.34M | 2.85% |
| MRVL Marvell Technology, Inc. | +3,485 | $1.04M | 2.21% |
| NOW ServiceNow, Inc. | +8,000 | $794.24K | 1.69% |
| SPCX Space Exploration Technologies Corp | +4,500 | $768.87K | 1.64% |
| VST Vistra Corp. | +2,500 | $396.58K | 0.843% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | WDC Western Digital Corp | Technology | 21.5K | $13.73M | 29.21% | +21.5K | – | New | 0.01% |
| 2 | ORCL Oracle Corp | Technology | 51.6K | $7.56M | 16.07% | +51.6K | – | New | 0% |
| 3 | MU Micron Technology Inc | Technology | 4,587 | $5.29M | 11.26% | -28.9K | -86.3% | Reduced | 0% |
| 4 | HOOD Robinhood Markets, Inc. | Financial Services | 51.4K | $5.15M | 10.96% | +51.4K | – | New | 0.01% |
| 5 | AAOI Applied Optoelectronics, Inc. | Technology | 26.5K | $3.93M | 8.35% | +16.5K | +164.6% | Added | 0.03% |
| 6 | IREN IREN Ltd | Technology | 53.5K | $2.45M | 5.2% | +53.5K | – | New | 0.01% |
| 7 | LITE Lumentum Holdings Inc. | Technology | 2,350 | $2.02M | 4.29% | -650 | -21.7% | Reduced | 0% |
| 8 | COHR Coherent Corp. | Technology | 5,000 | $1.97M | 4.19% | -32.8K | -86.8% | Reduced | 0% |
| 9 | STX Seagate Technology Holdings plc | Technology | 1,390 | $1.34M | 2.85% | +1,390 | – | New | 0% |
| 10 | MRVL Marvell Technology, Inc. | Technology | 3,485 | $1.04M | 2.21% | +3,485 | – | New | 0% |
| 11 | NOW ServiceNow, Inc. | Technology | 8,000 | $794.24K | 1.69% | +8,000 | – | New | 0% |
| 12 | SPCX Space Exploration Technologies Corp | Industrials | 4,500 | $768.87K | 1.64% | +4,500 | – | New | 0% |
| 13 | VST Vistra Corp. | Utilities | 2,500 | $396.58K | 0.843% | +2,500 | – | New | 0% |
| 14 | AMZN Amazon Com Inc | Consumer Discretionary | 1,250 | $297.93K | 0.634% | -46.7K | -97.4% | Reduced | 0% |
| 15 | META Meta Platforms, Inc. | Technology | 507 | $285.59K | 0.607% | -21.6K | -97.7% | Reduced | 0% |
Tip. Select a row to see that position’s full history at JAT Capital Mgmt.
As of its Q2 2026 13F filing, JAT Capital Mgmt LP’s five largest positions were Western Digital Corp (WDC) at 29.2%, Oracle Corp (ORCL) at 16.1%, Micron Technology Inc (MU) at 11.3%, Robinhood Markets, Inc. (HOOD) at 11.0%, Applied Optoelectronics, Inc. (AAOI) at 8.4% of the reported portfolio.
JAT Capital Mgmt LP reported a 13F portfolio worth $47.02M across 15 positions for Q2 2026. That is down 20.8% from the previous quarter.
Its largest purchases by value were Western Digital Corp ($13.73M), Oracle Corp ($7.56M), Robinhood Markets, Inc. ($5.15M). It opened 9 new positions.
Its largest sales by value were Micron Technology Inc ($33.37M), Coherent Corp. ($12.96M), Meta Platforms, Inc. ($12.17M). It exited 4 positions entirely.
From the Form 13F-HR reports JAT Capital Mgmt LP 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.