SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC

SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC declares $2.4B in 39 of the 220 AI and semiconductor companies tracked on Silicon Floor, as of Jun 30, 2026 (Form 13F): 42.4% of its $5.7B 13F portfolio. Largest positions: Sandisk (0.11% of the company) and MKS (0.47% of the company). Over time: $2.4B in 39 of these companies for Q2 2026, against $135.3M in 10 for Q4 2019 (13F values as filed). From Mar 31, 2026 to Jun 30, 2026, it bought $826.2M and sold $508.2M of these stocks, at the quarter's prices: a net purchase of $318.0M; 15 new positions and 6 sold out.

Performance of its AI picks

The AI-stock portfolio SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC declared for Q2 2026 (Form 13F), held unchanged, returned -13.9% in Q3 2026 (SMH -7.1%), ranked 1693 of 1,776 active managers. Over the last 12 months, quarter after quarter: +127.0% (SMH +87.2%), ranked 11 of 1,356 active managers. Over three years, quarter after quarter: +520.9% (SMH +325.8%), ranked 2 of 782 active managers. Over five years, quarter after quarter: +345.1% (SMH +389.8%), ranked 16 of 535 active managers. Trades made during a quarter are not visible in 13F filings: this measures its declared picks, not the return of its funds.

Largest positions

1. Sandisk (SNDK) — $353.3M: 155,402 shares, 0.11% of the company, 6.2% of its portfolio (trimmed this quarter); held since Q2 2025
2. MKS (MKSI) — $142.3M: 319,833 shares, 0.47% of the company, 2.5% of its portfolio (added this quarter); held since Q2 2025
3. DigitalOcean (DOCN) — $139.4M: 887,435 shares, 0.75% of the company, 2.4% of its portfolio (trimmed this quarter); held since Q4 2025
4. Solaris Energy Infrastructure (SEI) — $136.2M: 1.7M shares, 2.2% of the company, 2.4% of its portfolio (trimmed this quarter); held since Q4 2024
5. Tower Semiconductor (TSEM) — $134.9M: 517,547 shares, 0.46% of the company, 2.4% of its portfolio (trimmed this quarter); held since Q2 2024
6. Nebius (NBIS) — $124.1M: 449,416 shares, 0.18% of the company, 2.2% of its portfolio (added this quarter); held since Q1 2026
7. Snowflake (SNOW) — $112.1M: 440,409 shares, 0.12% of the company, 2.0% of its portfolio (new position this quarter)
8. Hut 8 (HUT) — $110.7M: 958,500 shares, 0.78% of the company, 1.9% of its portfolio (new position this quarter)
9. Datadog (DDOG) — $103.4M: 396,975 shares, 0.11% of the company, 1.8% of its portfolio (new position this quarter)
10. NVIDIA (NVDA) — $90.0M: 449,977 shares, 0.00% of the company, 1.6% of its portfolio (added this quarter); held since Q1 2023
11. Onto Innovation (ONTO) — $87.8M: 232,000 shares, 0.47% of the company, 1.5% of its portfolio (new position this quarter)
12. Silicon Motion (SIMO) — $87.3M: 261,815 shares, 0.78% of the company, 1.5% of its portfolio (trimmed this quarter); held since Q4 2023
13. SiTime (SITM) — $76.8M: 102,958 shares, 0.34% of the company, 1.3% of its portfolio (trimmed this quarter); held since Q4 2025
14. TSMC (TSM) — $58.9M: 123,250 shares, 0.00% of the company, 1.0% of its portfolio (trimmed this quarter); held since Q4 2023
15. Vertiv (VRT) — $53.9M: 160,915 shares, 0.04% of the company, 0.95% of its portfolio; held since Q3 2023

By sector

• Chips & compute — $483.9M, 20% of its AI holdings, 10 companies
• Neoclouds & data centers — $464.2M, 19% of its AI holdings, 7 companies
• Memory & storage — $440.6M, 18% of its AI holdings, 2 companies
• Equipment & test — $341.9M, 14% of its AI holdings, 6 companies
• Power, electrical & cooling — $303.8M, 13% of its AI holdings, 6 companies
• AI software — $253.6M, 11% of its AI holdings, 3 companies
• Interconnect — $53.6M, 2% of its AI holdings, 1 company
• Servers & systems — $49.4M, 2% of its AI holdings, 1 company
• Cloud & AI giants — $13.5M, 1% of its AI holdings, 2 companies
• Optics — $6.5M, 0% of its AI holdings, 1 company

Biggest changes this quarter

• opened a position in Snowflake (SNOW): +$112.1M at the quarter's price
• opened a position in Hut 8 (HUT): +$110.7M at the quarter's price
• opened a position in Datadog (DDOG): +$103.4M at the quarter's price
• opened a position in Onto Innovation (ONTO): +$87.8M at the quarter's price
• trimmed Sandisk (SNDK): -$68.4M at the quarter's price
• sold out of Akamai (AKAM): -$67.0M at the quarter's price
• trimmed Silicon Motion (SIMO): -$64.9M at the quarter's price
• trimmed Lattice Semiconductor (LSCC): -$52.5M at the quarter's price
• opened a position in Flex (FLEX): +$49.4M at the quarter's price
• added to Nebius (NBIS): +$46.8M at the quarter's price

Schedule 13D/G declarations

• Solaris Energy Infrastructure (SEI) — 13G filed Nov 14, 2025: 1.8M shares as of Sep 30, 2025, 4.0% as declared
• Solaris Energy Infrastructure (SEI) — 13G filed May 15, 2025: 2.0M shares as of Mar 31, 2025, 5.2% as declared
• Solaris Energy Infrastructure (SEI) — 13G filed Feb 14, 2025: 2.4M shares as of Dec 31, 2024, 6.5% as declared
• Solaris Energy Infrastructure (SEI) — 13G filed Dec 13, 2024: 2.2M shares as of Dec 6, 2024, 5.9% as declared

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