Sunstone Asset Management, LP In its 13F for Q1 2026 (holdings as of March 31, 2026, filed May 14, 2026), Sunstone Asset Management, LP reported 50 stock positions worth $75.9 million . Its top holding was Nvidia (NVDA) at 7.0% of the portfolio, followed by Mongodb (MDB, 5.2% ) and Macom Technology Solutions H (MTSI, 4.2% ). Compared with Q4 2025, it opened 17 new positions, sold out of 10, added to 17 and reduced 4. The biggest buy was a new position in Palo Alto Networks (PANW) and the biggest sale an exit from Cyberark Software Ltd./Israel (CYBR).
Location New York, NY
CIK 0002111996
Portfolio Value $75.9M (Q1 2026) Holdings 50 stocks · $75.9M Holdings quarter Q2 2026 Q1 2026 Q4 2025
Stock % Of Portfolio ▼ Shares Held Total Value Change vs Q4 2025 NVDA Nvidia Corp. 30,441 $5.3M Add +48.9% MDB Mongodb Inc. 15,996 $3.9M Add +193.4% MTSI Macom Technology Solutions H 14,261 $3.2M Add +11.8% TDS Telephone and Data Systems 70,604 $3.0M No change SNPS Synopsys Inc. 7,430 $2.9M Add +48.3% PANW Palo Alto Networks Inc. 17,113 $2.7M New AMAT Applied Materials Inc. 7,500 $2.6M Add +141.9% DASH DoorDash Inc. Class A 15,700 $2.4M Add +13.3% MRSH Marsh & McLennan Cos 13,132 $2.3M No change AMD Advanced Micro Devices 11,096 $2.3M New V Visa Inc. Class A 7,300 $2.2M No change MSFT Microsoft Corp. 5,900 $2.2M Add +20.4% ABNB Airbnb Inc. Class A 16,700 $2.1M No change GLW Corning Inc. 15,171 $2.1M New EQIX Equinix Inc. 2,085 $2.0M No change FLEX Flex Ltd. filed as FLEXTRONICS INTL LTD 30,274 $2.0M Reduce -9.7% APH Amphenol Corp. Class A 14,500 $1.8M New AMT American Tower Corp. 9,914 $1.7M No change SNDK Sandisk Corp. 2,600 $1.7M Reduce -13.3% NFLX Netflix Inc. 16,000 $1.5M No change TWLO Twilio Inc. Class A 11,566 $1.5M Add +10.0% KLAC KLA Corp. 960 $1.4M New GOOG Alphabet Inc. Class C 4,647 $1.3M Add +27.4% NOK Nokia Corp.-Spon ADR 164,800 $1.3M New NTNX Nutanix Inc. Class A 32,890 $1.3M Add +10.0% INTU Intuit Inc. 2,880 $1.2M New TTMI TTM Technologies 12,100 $1.2M Reduce -10.9% SE Sea Ltd.-ADR 13,614 $1.1M Add +105.8% CLS Celestica Inc. 3,998 $1.1M No change GLD SPDR Gold Shares 2,560 $1.1M Add +16.9% JOYY Joyy Inc.-ADR 18,705 $1.1M Add +34.5% SNOW Snowflake Inc. 7,200 $1.1M New SONY Sony Group Corp. - SP ADR 49,626 $1.0M Add +42.1% RMBS Rambus Inc. 11,746 $1.0M New U Unity Software Inc. 42,900 $941K New SHOP Shopify Inc. Class A 7,190 $853K Add +46.7% OLED Universal Display Corp. 9,217 $845K No change AVGO Broadcom Inc. 2,721 $843K Reduce -48.1% NOW ServiceNow Inc. 8,030 $839K Add +10.0% RBLX Roblox Corp. Class A 14,729 $833K New ORCL Oracle Corp. 5,500 $809K Add +10.0% ADI Analog Devices Inc. 2,400 $764K New ETSY Etsy Inc. 10,900 $545K No change ZS Zscaler Inc. 3,760 $527K New TCOM Trip.com Group Ltd.-ADR 9,700 $483K New ZM Zoom Communications Inc. 4,200 $338K New ESTC Elastic NV 6,600 $330K New S Sentinelone Inc. Class A 20,000 $258K New ZIP Ziprecruiter Inc. Class A 38,810 $71K No change EM Smart Share Global Ltd. - ADR 48,918 $55K No change
Options reported separately and not counted above: CORNING INC calls ($159K), ETSY INC calls ($72K), MAPLEBEAR INC calls ($38K), PALO ALTO NETWORKS INC calls ($21K), NUTANIX INC calls ($19K).
Other holdings (6): bonds, preferreds, convertibles and warrants · $8.9M (not counted above) Security Class Shares / Principal Value Change BILL HOLDINGS INC (BILL 0 04/01/30) NOTE 4/0 · principal 4,660,000 $4.2M Add +55.3% UNITY SOFTWARE INC (U 0 11/15/26) NOTE 11/1 · principal 2,000,000 $1.9M No change ETSY INC (ETSY 0.125 10/01/26) NOTE 0.125%10/0 · principal 1,000,000 $978K No change SUPER MICRO COMPUTER INC (SMCI 2.25 07/15/28) NOTE 2.250% 7/1 · principal 1,000,000 $872K New SUPER MICRO COMPUTER INC (SMCI 3.5 03/01/29) NOTE 3.500% 3/0 · principal 1,000,000 $800K No change FIVE9 INC (FIVN 1 03/15/29) NOTE 1.000% 3/1 · principal 200,000 $175K No change
Total filed on the 13F, all lines: $84.9M.
Portfolio Sells Q4 2025 → Q1 2026 Portfolio Sells quarter Q2 2026 Q1 2026 Q4 2025
Stock Change vs Q4 2025 % Of Portfolio Change To Portfolio ▲ CYBR Cyberark Software Ltd./Israel Sold out 0.00% −6.19 MNDY Monday.com Ltd. Sold out 0.00% −2.77 TXN Texas Instruments Inc. Sold out 0.00% −2.34 AVGO Broadcom Inc. Reduce -48.1% 1.11% −1.82 FORM Formfactor Inc. Sold out 0.00% −1.39 TTD Trade Desk Inc./the Class A Sold out 0.00% −1.23 CFLT Confluent Inc. Class A Sold out 0.00% −1.04 DDOG Datadog Inc. Class A Sold out 0.00% −0.70 BE Bloom Energy Corp. Class A Sold out 0.00% −0.67 SMCI Super Micro Computer Inc. Sold out 0.00% −0.66 FLEX Flex Ltd. Reduce -9.7% 2.61% −0.66 KVYO Klaviyo Inc. Class A Sold out 0.00% −0.54 TTMI TTM Technologies Reduce -10.9% 1.55% +0.04 SNDK Sandisk Corp. Reduce -13.3% 2.18% +1.03
Portfolio Buys Q4 2025 → Q1 2026 Portfolio Buys quarter Q2 2026 Q1 2026 Q4 2025
Stock Change vs Q4 2025 % Of Portfolio Change To Portfolio ▼ PANW Palo Alto Networks Inc. New 3.61% +3.61 AMD Advanced Micro Devices New 2.97% +2.97 GLW Corning Inc. New 2.72% +2.72 APH Amphenol Corp. Class A New 2.41% +2.41 AMAT Applied Materials Inc. Add +141.9% 3.38% +2.09 KLAC KLA Corp. New 1.86% +1.86 NOK Nokia Corp.-Spon ADR New 1.74% +1.74 INTU Intuit Inc. New 1.64% +1.64 MDB Mongodb Inc. Add +193.4% 5.16% +1.46 SNOW Snowflake Inc. New 1.43% +1.43 RMBS Rambus Inc. New 1.33% +1.33 U Unity Software Inc. New 1.24% +1.24 RBLX Roblox Corp. Class A New 1.10% +1.10 ADI Analog Devices Inc. New 1.01% +1.01 NVDA Nvidia Corp. Add +48.9% 6.99% +0.84 ZS Zscaler Inc. New 0.69% +0.69 MTSI Macom Technology Solutions H Add +11.8% 4.17% +0.64 TCOM Trip.com Group Ltd.-ADR New 0.64% +0.64 ZM Zoom Communications Inc. New 0.44% +0.44 ESTC Elastic NV New 0.43% +0.43 S Sentinelone Inc. Class A New 0.34% +0.34 SE Sea Ltd.-ADR Add +105.8% 1.48% +0.12 SNPS Synopsys Inc. Add +48.3% 3.88% +0.08 GLD SPDR Gold Shares Add +16.9% 1.45% +0.05 JOYY Joyy Inc.-ADR Add +34.5% 1.44% −0.02 SONY Sony Group Corp. - SP ADR Add +42.1% 1.35% −0.09 GOOG Alphabet Inc. Class C Add +27.4% 1.76% −0.09 SHOP Shopify Inc. Class A Add +46.7% 1.12% −0.15 TWLO Twilio Inc. Class A Add +10.0% 1.92% −0.50 ORCL Oracle Corp. Add +10.0% 1.07% −0.51 NOW ServiceNow Inc. Add +10.0% 1.11% −0.70 NTNX Nutanix Inc. Class A Add +10.0% 1.65% −0.85 MSFT Microsoft Corp. Add +20.4% 2.88% −0.95 DASH DoorDash Inc. Class A Add +13.3% 3.10% −1.96
Options Activity Q4 2025 → Q1 2026 Security Type Change vs Q4 2025 Underlying Shares Value ▼ TERADYNE INC call Sold out 10,000 $967Kbefore exit MONGODB INC call Sold out 5,000 $368Kbefore exit CONFLUENT INC call Sold out 45,000 $240Kbefore exit BROADCOM INC call Sold out 5,000 $232Kbefore exit CORNING INC call New 10,000 $159K ETSY INC call New 12,500 $72K NVIDIA CORPORATION call Sold out 10,000 $68Kbefore exit SENTINELONE INC call Sold out 70,000 $21Kbefore exit
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
Notes & Other Activity Q4 2025 → Q1 2026 Bonds, preferreds, convertibles and warrants; not part of the stock holdings or percentages above.
All Filings Quarter Positions 13F Reported Value Top Holdings Q2 2026 57 $92.4M AMAT, MKSI, MTSI, GLW, DASH Q1 2026 50 $75.9M NVDA, MDB, MTSI, TDS, SNPS Q4 2025 43 $61.9M CYBR, NVDA, DASH, TDS, V