Sunstone Asset Management, LP reported 42 positions worth $79.33M for the quarter ended Jun 30, 2026, up 4.5% on the prior quarter. It opened 12 new positions, added to 10, trimmed 7 and exited 19. Its largest holding is Applied Materials Inc at 6.9% 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 |
|---|---|---|---|---|
| MKSI Mks Inc | +11.6K | – | $5.16M | 6.5% |
| ASML Asml Holding Nv | +1,700 | – | $3.38M | 4.26% |
| GSAT Globalstar, Inc. | +33.5K | – | $2.72M | 3.43% |
| AMZN Amazon Com Inc | +10.3K | – | $2.45M | 3.09% |
| ANET Arista Networks, Inc. | +10.4K | – | $1.77M | 2.23% |
| CIEN Ciena Corp | +3,040 | – | $1.49M | 1.88% |
| ADI Analog Devices Inc | +3,600 | +150.0% | $1.43M | 3% |
| STX Seagate Technology Holdings plc | +1,480 | – | $1.43M | 1.8% |
| DASH DoorDash, Inc. | +7,200 | +45.9% | $1.33M | 5.33% |
| SNOW Snowflake Inc. | +4,800 | +66.7% | $1.22M | 3.85% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| NVDA Nvidia Corp | -30.4K | -100.0% | $5.31M | Exited |
| MDB MongoDB, Inc. | -16.0K | -100.0% | $3.92M | Exited |
| PANW Palo Alto Networks Inc | -17.1K | -100.0% | $2.74M | Exited |
| AMD Advanced Micro Devices Inc | -11.1K | -100.0% | $2.26M | Exited |
| MSFT Microsoft Corp | -5,900 | -100.0% | $2.18M | Exited |
| FLEX Flex Ltd. | -30.3K | -100.0% | $1.98M | Exited |
| KLAC Kla Corp | -6,060 | -63.1% | $1.83M | 1.35% |
| ABNB Airbnb, Inc. | -11.7K | -70.1% | $1.67M | 0.902% |
| SNDK Sandisk Corp | -2,600 | -100.0% | $1.65M | Exited |
| NFLX Netflix Inc | -16.0K | -100.0% | $1.54M | Exited |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| MKSI Mks Inc | +11.6K | $5.16M | 6.5% |
| ASML Asml Holding Nv | +1,700 | $3.38M | 4.26% |
| GSAT Globalstar, Inc. | +33.5K | $2.72M | 3.43% |
| AMZN Amazon Com Inc | +10.3K | $2.45M | 3.09% |
| ANET Arista Networks, Inc. | +10.4K | $1.77M | 2.23% |
| CIEN Ciena Corp | +3,040 | $1.49M | 1.88% |
| STX Seagate Technology Holdings plc | +1,480 | $1.43M | 1.8% |
| TER Teradyne, Inc | +2,320 | $1.12M | 1.41% |
| NET Cloudflare, Inc. | +4,046 | $993.54K | 1.25% |
| COHR Coherent Corp. | +2,400 | $946.73K | 1.19% |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| NVDA Nvidia Corp | -30.4K | $5.31M | 7% |
| MDB MongoDB, Inc. | -16.0K | $3.92M | 5.16% |
| PANW Palo Alto Networks Inc | -17.1K | $2.74M | 3.62% |
| AMD Advanced Micro Devices Inc | -11.1K | $2.26M | 2.97% |
| MSFT Microsoft Corp | -5,900 | $2.18M | 2.88% |
| FLEX Flex Ltd. | -30.3K | $1.98M | 2.61% |
| SNDK Sandisk Corp | -2,600 | $1.65M | 2.18% |
| NFLX Netflix Inc | -16.0K | $1.54M | 2.03% |
| GOOG Alphabet Inc. | -4,647 | $1.33M | 1.76% |
| NOK Nokia Corp | -164.8K | $1.32M | 1.75% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | AMAT Applied Materials Inc | Technology | 7,580 | $5.48M | 6.91% | +80 | +1.1% | Added | 0% |
| 2 | MKSI Mks Inc | Technology | 11.6K | $5.16M | 6.5% | +11.6K | – | New | 0.02% |
| 3 | MTSI MACOM Technology Solutions Holdings, Inc. | Technology | 11.7K | $4.44M | 5.59% | -2,600 | -18.2% | Reduced | 0.02% |
| 4 | GLW Corning Inc | Basic Materials | 17.1K | $4.35M | 5.49% | +1,881 | +12.4% | Added | 0% |
| 5 | DASH DoorDash, Inc. | Technology | 22.9K | $4.23M | 5.33% | +7,200 | +45.9% | Added | 0.01% |
| 6 | SNPS Synopsys Inc | Technology | 8,150 | $3.64M | 4.58% | +720 | +9.7% | Added | 0% |
| 7 | ASML Asml Holding Nv | Technology | 1,700 | $3.38M | 4.26% | +1,700 | – | New | 0% |
| 8 | SNOW Snowflake Inc. | Technology | 12.0K | $3.05M | 3.85% | +4,800 | +66.7% | Added | 0% |
| 9 | GSAT Globalstar, Inc. | Communication Services | 33.5K | $2.72M | 3.43% | +33.5K | – | New | 0.03% |
| 10 | TDS Telephone & Data Systems Inc | Communication Services | 70.6K | $2.61M | 3.29% | 0 | 0.0% | Unchanged | 0.06% |
| 11 | APH Amphenol Corp | Industrials | 29.0K | $2.56M | 3.22% | 0 | 0.0% | Unchanged | 0% |
| 12 | SE Sea Ltd | Technology | 26.2K | $2.51M | 3.17% | +12.6K | +92.6% | Added | 0% |
| 13 | V Visa Inc. | Financial Services | 7,300 | $2.50M | 3.16% | 0 | 0.0% | Unchanged | 0% |
| 14 | AMZN Amazon Com Inc | Consumer Discretionary | 10.3K | $2.45M | 3.09% | +10.3K | – | New | 0% |
| 15 | ADI Analog Devices Inc | Technology | 6,000 | $2.38M | 3% | +3,600 | +150.0% | Added | 0% |
Tip. Select a row to see that position’s full history at Sunstone Asset Management.
As of its Q2 2026 13F filing, Sunstone Asset Management, LP’s five largest positions were Applied Materials Inc (AMAT) at 6.9%, Mks Inc (MKSI) at 6.5%, MACOM Technology Solutions Holdings, Inc. (MTSI) at 5.6%, Corning Inc (GLW) at 5.5%, DoorDash, Inc. (DASH) at 5.3% of the reported portfolio.
Sunstone Asset Management, LP reported a 13F portfolio worth $79.33M across 42 positions for Q2 2026. That is up 4.5% from the previous quarter.
Its largest purchases by value were Mks Inc ($5.16M), Asml Holding Nv ($3.38M), Globalstar, Inc. ($2.72M). It opened 12 new positions.
Its largest sales by value were Nvidia Corp ($5.31M), MongoDB, Inc. ($3.92M), Palo Alto Networks Inc ($2.74M). It exited 19 positions entirely.
From the Form 13F-HR reports Sunstone Asset Management, 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.