Leopold Aschenbrenner portfolio
Former OpenAI researcher and author of the essay series Situational Awareness. His fund invests in companies tied to the buildout of AI, from chips and power to data centers.
Situational Awareness LP's 13F for the quarter ending Jun 30, 2026 (filed Aug 14, 2026) reports 26 positions worth $20.2B. The largest are Sandisk Corporation (28.0%), Micron Technology, Inc. (27.5%), Bloom Energy Corporation (9.4%). The top five make up 77% of the reported portfolio.
Since their last filing
How the stocks in this filing have moved since its quarter ended, weighted by position size. This is not the fund's own return: a 13F leaves out cash, short positions and anything bought or sold since.
Biggest movers
- SNDKSandisk Corporation−29.2%
- MUMicron Technology, Inc.−10.3%
- CORZCore Scientific, Inc.−40.0%
- NBISNebius Group N.V.−20.4%
What changed in Q2 2026
Compared with the previous 13F. Sorted by how much the share count changed, not by position size.
New 5
| NBIS Nebius Group N.V. | New position | 0% to 6.1% |
| STM Stmicroelectronics | New position | 0% to 2.9% |
| KEEL Keel Infrastructure Corp. | New position | 0% to 0.8% |
| VSH Vishay Intertechnology Inc | New position | 0% to 0.1% |
| CBRS Cerebras Systems Inc. | New position | 0% to <0.1% |
Added 11
| MU Micron Technology, Inc. | +27712.4% shares | <0.1% to 27.5% |
| TSM Taiwan Semiconductor Manufacturing Company Limited | +11713.9% shares | <0.1% to 6.2% |
| SHAZ Sharonai Holdings Inc | +577.8% shares | 0.1% to 2.3% |
| HIVE HIVE Digital Technologies Ltd. | +169.3% shares | <0.1% to 0.2% |
| SNDK Sandisk Corporation | +118.9% shares | 5.3% to 28.0% |
| PUMP Propetro Hldg Corp | +115.4% shares | 0.1% to 0.1% |
| BW Babcock & Wilcox Enterprises | +49.7% shares | 0.1% to 0.1% on price |
| RIOT Riot Platforms, Inc. | +48.7% shares | 1.0% to 2.3% |
| APLD Applied Digital Corporation | +14.1% shares | 2.3% to 2.3% on price |
| CRWV CoreWeave, Inc. | +4.2% shares | 4.1% to 3.7% on price |
| SEI Solaris Energy Infras Inc | +2.2% shares | 0.5% to 0.5% on price |
Trimmed 5
| TSM Taiwan Semiconductor Manufacturing Company Limited (call options) | −95.2% shares | 2.6% to 0.1% |
| BE Bloom Energy Corporation (call options) | −64.3% shares | 0.4% to 0.2% |
| TE T1 Energy Inc. | −51.0% shares | 0.3% to 0.2% |
| IREN IREN Limited | −19.0% shares | 2.9% to 2.1% |
| BE Bloom Energy Corporation | −3.3% shares | 6.4% to 9.4% on price |
Sold out 21
| SMH VanEck Semiconductor ETF (put options) | Sold out | was 14.9% of portfolio |
| NVDA NVIDIA Corporation (put options) | Sold out | was 11.5% of portfolio |
| ORCL Oracle Corporation (put options) | Sold out | was 7.8% of portfolio |
| AVGO Broadcom Inc. (put options) | Sold out | was 7.4% of portfolio |
| AMD Advanced Micro Devices, Inc. (put options) | Sold out | was 7.1% of portfolio |
| MU Micron Technology, Inc. (put options) | Sold out | was 4.3% of portfolio |
| TSM Taiwan Semiconductor Manufacturing Company Limited (put options) | Sold out | was 3.9% of portfolio |
| ASML ASML Holding N.V. (put options) | Sold out | was 3.6% of portfolio |
| MU Micron Technology, Inc. (call options) | Sold out | was 3.1% of portfolio |
| SNDK Sandisk Corporation (call options) | Sold out | was 2.8% of portfolio |
| INTC Intel Corporation (put options) | Sold out | was 1.2% of portfolio |
| CRWV CoreWeave, Inc. (call options) | Sold out | was 1.0% of portfolio |
| Bitfarms Ltd | Sold out | was 0.3% of portfolio |
| PSIX Power Solutions Intl Inc | Sold out | was 0.2% of portfolio |
| GLW Corning Incorporated (put options) | Sold out | was 0.1% of portfolio |
Plus 6 more in the Howl app.
Holdings
| # | Stock | Weight | Value | Shares vs last quarter |
|---|---|---|---|---|
| 1 | SNDK Sandisk Corporation | 28.0% | $5.7B | +118.9% |
| 2 | MU Micron Technology, Inc. | 27.5% | $5.6B | +27712.4% |
| 3 | BE Bloom Energy Corporation | 9.4% | $1.9B | −3.3% |
| 4 | TSM Taiwan Semiconductor Manufacturing Company Limited | 6.2% | $1.3B | +11713.9% |
| 5 | NBIS Nebius Group N.V. | 6.1% | $1.2B | New |
| 6 | CRWV CoreWeave, Inc. | 3.7% | $744.5M | +4.2% |
| 7 | CORZ Core Scientific, Inc. | 3.3% | $665.6M | No change |
| 8 | STM Stmicroelectronics | 2.9% | $584.3M | New |
| 9 | APLD Applied Digital Corporation | 2.3% | $469.0M | +14.1% |
| 10 | RIOT Riot Platforms, Inc. | 2.3% | $468.2M | +48.7% |
| 11 | SHAZ Sharonai Holdings Inc | 2.3% | $456.8M | +577.8% |
| 12 | IREN IREN Limited | 2.1% | $433.3M | −19.0% |
| 13 | CLSK CleanSpark, Inc. | 0.9% | $178.6M | No change |
| 14 | KEEL Keel Infrastructure Corp. | 0.8% | $151.8M | New |
| 15 | SEI Solaris Energy Infras Inc | 0.5% | $90.9M | +2.2% |
| 16 | WYFI Whitefiber Inc | 0.3% | $68.3M | No change |
| 17 | BTDR Bitdeer Technologies Group | 0.3% | $54.6M | No change |
| 18 | TE T1 Energy Inc. | 0.2% | $46.5M | −51.0% |
| 19 | BE Bloom Energy Corporation (call options) | 0.2% | $44.1M | −64.3% |
| 20 | HIVE HIVE Digital Technologies Ltd. | 0.2% | $33.2M | +169.3% |
| 21 | BW Babcock & Wilcox Enterprises | 0.1% | $28.6M | +49.7% |
| 22 | PUMP Propetro Hldg Corp | 0.1% | $28.1M | +115.4% |
| 23 | TSM Taiwan Semiconductor Manufacturing Company Limited (call options) | 0.1% | $23.9M | −95.2% |
| 24 | VSH Vishay Intertechnology Inc | 0.1% | $20.2M | New |
| 25 | INFY Infosys Ltd (put options) | <0.1% | $5.2M | No change |
| 26 | CBRS Cerebras Systems Inc. | <0.1% | $2.2M | New |
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Questions
What does Leopold Aschenbrenner own?
As of the 13F for Jun 30, 2026, Situational Awareness LP's largest holdings were Sandisk Corporation (28.0%), Micron Technology, Inc. (27.5%), Bloom Energy Corporation (9.4%), Taiwan Semiconductor Manufacturing Company Limited (6.2%), Nebius Group N.V. (6.1%).
What did Leopold Aschenbrenner buy last quarter?
New positions: Nebius Group N.V., Stmicroelectronics, Keel Infrastructure Corp., Vishay Intertechnology Inc, Cerebras Systems Inc.. Biggest additions by share count: Micron Technology, Inc., Taiwan Semiconductor Manufacturing Company Limited, Sharonai Holdings Inc, HIVE Digital Technologies Ltd., Sandisk Corporation.
What did Leopold Aschenbrenner sell last quarter?
Sold out of: VanEck Semiconductor ETF, NVIDIA Corporation, Oracle Corporation, Broadcom Inc., Advanced Micro Devices, Inc.. Biggest reductions by share count: Taiwan Semiconductor Manufacturing Company Limited, Bloom Energy Corporation, T1 Energy Inc., IREN Limited, Bloom Energy Corporation.
When is Leopold Aschenbrenner's next 13F filing?
Funds file a 13F within 45 days after each quarter ends. The next one, covering the quarter ending Sep 30, 2026, is due by Nov 14, 2026.
What doesn't a 13F show?
A 13F lists US-listed stocks and options a fund held on the last day of the quarter. It leaves out cash, short positions, bonds, most non-US stocks, and any trading since the quarter ended.
Other investors
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- Bill AckmanPershing Square Capital Management
- Bill GatesGates Foundation Trust
- Carl IcahnIcahn Capital
- Cathie WoodARK Investment Management
- Chase ColemanTiger Global Management
- Chris HohnTCI Fund Management
- Chuck AkreAkre Capital Management
- Daniel LoebThird Point
- Daniel SundheimD1 Capital Partners
- David EinhornGreenlight Capital
- David TepperAppaloosa Management
- George SorosSoros Fund Management
- Howard MarksOaktree Capital Management
- Li LuHimalaya Capital
- Mohnish PabraiPabrai Investment Funds
- Nelson PeltzTrian Partners
- Paul SingerElliott Management
- Philippe LaffontCoatue Management
- Seth KlarmanBaupost Group
- Stanley DruckenmillerDuquesne Family Office
- Stephen MandelLone Pine Capital
- Warren BuffettBerkshire Hathaway