Atlatl Advisers LLC reported 66 positions worth $205.94M for the quarter ended Sep 30, 2026, up 5.6% on the prior quarter. It opened 5 new positions, added to 27, trimmed 29 and exited 285. Its largest holding is Microsoft Corp at 5.6% 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 |
|---|---|---|---|---|
| PSX Phillips 66 | +42.6K | +22,924.7% | $10.89M | 5.31% |
| MPC Marathon Petroleum Corp | +27.3K | +118,887.0% | $10.81M | 5.25% |
| VLO Valero Energy Corp | +26.3K | – | $10.21M | 4.96% |
| IBIT iShares Bitcoin Trust ETF | +210.9K | +9,449.6% | $9.98M | 4.9% |
| ILMN Illumina, Inc. | +35.2K | – | $9.62M | 4.67% |
| MSFT Microsoft Corp | +17.9K | +386.3% | $9.20M | 5.62% |
| FTNT Fortinet, Inc. | +42.5K | +6,534.8% | $7.59M | 3.74% |
| CRWD CrowdStrike Holdings, Inc. | +27.2K | +2,383.4% | $7.19M | 3.64% |
| NTAP NetApp, Inc. | +33.5K | +15,295.4% | $7.04M | 3.44% |
| P Everpure, Inc. | +42.2K | – | $5.51M | 2.68% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| SNDK Sandisk Corp | -4,204 | -55.1% | $7.32M | 2.89% |
| AMAT Applied Materials Inc | -9,365 | -100.0% | $6.77M | Exited |
| FIX Comfort Systems Usa Inc | -3,063 | -100.0% | $6.07M | Exited |
| GLW Corning Inc | -23.3K | -100.0% | $5.96M | Exited |
| TER Teradyne, Inc | -12.2K | -100.0% | $5.90M | Exited |
| WDC Western Digital Corp | -12.7K | -91.2% | $5.77M | 0.27% |
| KLAC Kla Corp | -18.1K | -100.0% | $5.47M | Exited |
| ARM Arm Holdings Plc | -14.3K | -100.0% | $5.06M | Exited |
| LRCX Lam Research Corp | -14.6K | -89.8% | $4.78M | 0.263% |
| MU Micron Technology Inc | -4,466 | -40.3% | $4.76M | 3.42% |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| AMAT Applied Materials Inc | -9,365 | $6.77M | 3.47% |
| FIX Comfort Systems Usa Inc | -3,063 | $6.07M | 3.11% |
| GLW Corning Inc | -23.3K | $5.96M | 3.06% |
| TER Teradyne, Inc | -12.2K | $5.90M | 3.03% |
| KLAC Kla Corp | -18.1K | $5.47M | 2.8% |
| ARM Arm Holdings Plc | -14.3K | $5.06M | 2.6% |
| COHR Coherent Corp. | -11.2K | $4.41M | 2.26% |
| GEV GE Vernova Inc. | -1,166 | $1.37M | 0.702% |
| NBIS Nebius Group N.V. | -3,500 | $966.60K | 0.496% |
| MRNA Moderna, Inc. | -5,000 | $350.15K | 0.18% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | MSFT Microsoft Corp | Technology | 22.6K | $11.58M | 5.62% | +17.9K | +386.3% | Added | 0% |
| 2 | PSX Phillips 66 | Energy | 42.8K | $10.93M | 5.31% | +42.6K | +22,924.7% | Added | 0.01% |
| 3 | MPC Marathon Petroleum Corp | Energy | 27.4K | $10.82M | 5.25% | +27.3K | +118,887.0% | Added | 0.01% |
| 4 | VLO Valero Energy Corp | Energy | 26.3K | $10.21M | 4.96% | +26.3K | – | New | 0.01% |
| 5 | IBIT iShares Bitcoin Trust ETF | Others | 213.1K | $10.09M | 4.9% | +210.9K | +9,449.6% | Added | 0.02% |
| 6 | ILMN Illumina, Inc. | Healthcare | 35.2K | $9.62M | 4.67% | +35.2K | – | New | 0.02% |
| 7 | FTNT Fortinet, Inc. | Technology | 43.1K | $7.71M | 3.74% | +42.5K | +6,534.8% | Added | 0.01% |
| 8 | CRWD CrowdStrike Holdings, Inc. | Technology | 28.3K | $7.50M | 3.64% | +27.2K | +2,383.4% | Added | 0% |
| 9 | PANW Palo Alto Networks Inc | Technology | 18.3K | $7.27M | 3.53% | -1,147 | -5.9% | Reduced | 0% |
| 10 | NTAP NetApp, Inc. | Technology | 33.7K | $7.08M | 3.44% | +33.5K | +15,295.4% | Added | 0.02% |
| 11 | MU Micron Technology Inc | Technology | 6,614 | $7.04M | 3.42% | -4,466 | -40.3% | Reduced | 0% |
| 12 | HPE Hewlett Packard Enterprise Co | Technology | 102.9K | $6.57M | 3.19% | -19.2K | -15.7% | Reduced | 0.01% |
| 13 | STX Seagate Technology Holdings plc | Technology | 6,635 | $6.12M | 2.97% | -1,316 | -16.6% | Reduced | 0% |
| 14 | SNDK Sandisk Corp | Technology | 3,420 | $5.95M | 2.89% | -4,204 | -55.1% | Reduced | 0% |
| 15 | AMD Advanced Micro Devices Inc | Technology | 9,293 | $5.69M | 2.76% | -4,185 | -31.1% | Reduced | 0% |
Tip. Select a row to see that position’s full history at Atlatl Advisers.
As of its Q3 2026 13F filing, Atlatl Advisers LLC’s five largest positions were Microsoft Corp (MSFT) at 5.6%, Phillips 66 (PSX) at 5.3%, Marathon Petroleum Corp (MPC) at 5.3%, Valero Energy Corp (VLO) at 5.0%, iShares Bitcoin Trust ETF (IBIT) at 4.9% of the reported portfolio.
Atlatl Advisers LLC reported a 13F portfolio worth $205.94M across 66 positions for Q3 2026. That is up 5.6% from the previous quarter.
Its largest purchases by value were Phillips 66 ($10.89M), Marathon Petroleum Corp ($10.81M), Valero Energy Corp ($10.21M). It opened 5 new positions.
Its largest sales by value were Sandisk Corp ($7.32M), Applied Materials Inc ($6.77M), Comfort Systems Usa Inc ($6.07M). It exited 285 positions entirely.
From the Form 13F-HR reports Atlatl Advisers LLC 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.