In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), Alta Park Capital, LP reported 38 stock positions worth $993.3 million . Its top holding was Nu Holdings Ltd./Cayman Isl-A (NU) at 7.3% of the portfolio, followed by AppLovin Class A (APP, 6.1% ) and Western Digital (WDC, 5.7% ). Compared with Q2 2025, it opened 17 new positions, sold out of 10, added to 11 and reduced 8. The biggest buy was a new position in Alibaba Group Holding-SP ADR (BABA) and the biggest sale an exit from Amazon.com (AMZN).
Location San Francisco, CA
CIK 0001621855
Portfolio Value $993.3M (Q3 2025) Holdings 38 stocks · $993.3M Holdings quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock % Of Portfolio ▼ Shares Held Total Value Change vs Q2 2025 NU Nu Holdings Ltd./Cayman Isl-A filed as NU HLDGS LTD 4,539,234 $72.7M Add +4.2% APP AppLovin Corp. Class A 84,422 $60.7M Add +46.9% WDC Western Digital Corp. 470,900 $56.5M Reduce -29.1% META Meta Platforms Inc. Class A 73,988 $54.3M Add +2.4% BABA Alibaba Group Holding-SP ADR 259,292 $46.3M New NVDA Nvidia Corp. 219,501 $41.0M Reduce -18.9% SPOT Spotify Technology SA 55,196 $38.5M Add +22.3% TER Teradyne Inc. 275,522 $37.9M New ORCL Oracle Corp. 113,021 $31.8M Reduce -58.9% NTSK Netskope Inc. Class A 1,312,813 $29.8M New NFLX Netflix Inc. 23,889 $28.6M Add +2.8% RBRK Rubrik Inc. Class A 344,134 $28.3M New AMAT Applied Materials Inc. 136,287 $27.9M New RBLX Roblox Corp. Class A 199,348 $27.6M New WIX Wix.com Ltd. 154,788 $27.5M Add +51.8% COMP Compass Inc. Class A 3,400,668 $27.3M Add +7.5% SNDK Sandisk Corp. 240,929 $27.0M New S Sentinelone Inc. Class A 1,416,149 $24.9M Add +5.7% VRT Vertiv Holdings Co. Class A 160,866 $24.3M Reduce -25.4% ANET Arista Networks Inc. 162,356 $23.7M Reduce -34.8% COHR Coherent Corp. 216,419 $23.3M New CVNA Carvana Co. 60,304 $22.7M Add +7.8% PANW Palo Alto Networks Inc. 105,000 $21.4M No change MRVL Marvell Technology Inc. 228,406 $19.2M Add +121.2% MDB Mongodb Inc. 59,603 $18.5M New MELI MercadoLibre Inc. 7,203 $16.8M Reduce -57.6% U Unity Software Inc. 418,650 $16.8M New AVGO Broadcom Inc. 49,935 $16.5M New ONTO Onto Innovation Inc. 126,112 $16.3M New SMTC Semtech Corp. 203,618 $14.5M New MIR Mirion Technologies Inc. 611,161 $14.2M New COIN Coinbase Global Inc. Class A 40,980 $13.8M Add +85.6% CFLT Confluent Inc. Class A 473,504 $9.4M New MSFT Microsoft Corp. 18,049 $9.3M New RDDT Reddit Inc. Class A 36,908 $8.5M New TWLO Twilio Inc. Class A 65,381 $6.5M Reduce -78.6% MGNI Magnite Inc. 255,698 $5.6M Reduce -38.2% MQ Marqeta Inc. 596,255 $3.1M No change
Options reported separately and not counted above: QQQ puts ($96.1M), SMH puts ($55.5M).
Portfolio Sells Q2 2025 → Q3 2025 Portfolio Sells quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q2 2025 % Of Portfolio Change To Portfolio ▲ AMZN Amazon.com Inc. Sold out 0.00% −5.20 DASH DoorDash Inc. Class A Sold out 0.00% −4.28 ORCL Oracle Corp. Reduce -58.9% 3.20% −4.21 TWLO Twilio Inc. Class A Reduce -78.6% 0.66% −4.03 MELI MercadoLibre Inc. Reduce -57.6% 1.69% −3.79 DDOG Datadog Inc. Class A Sold out 0.00% −3.19 UBER Uber Technologies Inc. Sold out 0.00% −3.11 ZM Zoom Communications Inc. Sold out 0.00% −2.83 PINS Pinterest Inc. Class A Sold out 0.00% −2.06 FWONK Liberty Media Corp. Class C Sold out 0.00% −1.41 NVDA Nvidia Corp. Reduce -18.9% 4.12% −1.15 MU Micron Technology Inc. Sold out 0.00% −1.05 VRT Vertiv Holdings Co. Class A Reduce -25.4% 2.44% −0.97 ALAB Astera Labs Inc. Sold out 0.00% −0.93 ANET Arista Networks Inc. Reduce -34.8% 2.38% −0.76 VOYG Voyager Technologies Inc. Class A Sold out 0.00% −0.74 MGNI Magnite Inc. Reduce -38.2% 0.56% −0.67 WDC Western Digital Corp. Reduce -29.1% 5.69% +0.46
Portfolio Buys Q2 2025 → Q3 2025 Portfolio Buys quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q2 2025 % Of Portfolio Change To Portfolio ▼ BABA Alibaba Group Holding-SP ADR New 4.67% +4.67 TER Teradyne Inc. New 3.82% +3.82 APP AppLovin Corp. Class A Add +46.9% 6.11% +3.63 NTSK Netskope Inc. Class A New 3.00% +3.00 RBRK Rubrik Inc. Class A New 2.85% +2.85 AMAT Applied Materials Inc. New 2.81% +2.81 RBLX Roblox Corp. Class A New 2.78% +2.78 SNDK Sandisk Corp. New 2.72% +2.72 COHR Coherent Corp. New 2.35% +2.35 MDB Mongodb Inc. New 1.86% +1.86 U Unity Software Inc. New 1.69% +1.69 AVGO Broadcom Inc. New 1.66% +1.66 ONTO Onto Innovation Inc. New 1.64% +1.64 SMTC Semtech Corp. New 1.46% +1.46 MIR Mirion Technologies Inc. New 1.43% +1.43 MRVL Marvell Technology Inc. Add +121.2% 1.93% +0.95 CFLT Confluent Inc. Class A New 0.94% +0.94 MSFT Microsoft Corp. New 0.94% +0.94 RDDT Reddit Inc. Class A New 0.85% +0.85 WIX Wix.com Ltd. Add +51.8% 2.77% +0.78 COIN Coinbase Global Inc. Class A Add +85.6% 1.39% +0.44 COMP Compass Inc. Class A Add +7.5% 2.75% +0.30 CVNA Carvana Co. Add +7.8% 2.29% −0.03 NU Nu Holdings Ltd./Cayman Isl-A Add +4.2% 7.32% −0.05 SPOT Spotify Technology SA Add +22.3% 3.88% −0.39 S Sentinelone Inc. Class A Add +5.7% 2.51% −0.51 NFLX Netflix Inc. Add +2.8% 2.88% −0.95 META Meta Platforms Inc. Class A Add +2.4% 5.47% −1.11
Options Activity Q2 2025 → Q3 2025 Security Type Change vs Q2 2025 Underlying Shares Value ▼ QQQ Invesco QQQ Trust Series 1 put New 160,000 $96.1M APP AppLovin Corp. Class A call Sold out 200,000 $70.0Mbefore exit SMH Vaneck Semiconductor ETF put New 170,000 $55.5M
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
All Filings Quarter Positions 13F Reported Value Top Holdings Q2 2026 26 $1.1B SNDK, WDC, MRVL, AMAT, TER Q1 2026 24 $621.9M NFLX, NU, AAPL, AMAT, WDC Q4 2025 34 $831.1M WDC, NU, SNDK, NVDA, COMP Q3 2025 38 $993.3M NU, APP, WDC, META, BABA Q2 2025 31 $811.1M ORCL, NU, META, MELI, NVDA Q1 2025 21 $515.3M BABA, MELI, S, NU, NFLX Q4 2024 34 $764.2M AMZN, S, NFLX, NU, TSM Q3 2024 32 $713.6M NU, S, BABA, GTLB, MELI Q2 2024 28 $762.4M NU, AMZN, AAPL, NVDA, S Q1 2024 35 $922.9M NU, AMZN, NFLX, META, S