ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP declares $99.1B in 126 of the 230 AI and semiconductor companies tracked on Silicon Floor, as of Jun 30, 2026 (Form 13F): 44.0% of its $225.4B 13F portfolio. Largest positions: Alphabet (0.24% of the company) and Microsoft (0.37% of the company). Over time: $99.1B in 126 of these companies for Q2 2026, against $7.9B in 103 for Q4 2019 (13F values as filed). From Mar 31, 2026 to Jun 30, 2026, it bought $15.9B and sold $14.9B of these stocks, at the quarter's prices: a net purchase of $1.1B; 30 new positions and 15 sold out.

Performance of its AI picks

The AI-stock portfolio ARROWSTREET CAPITAL, LIMITED PARTNERSHIP declared for Q2 2026 (Form 13F), held unchanged, returned +4.4% in Q3 2026 (SMH -7.1%), ranked 756 of 1,785 active managers. Over the last 12 months, quarter after quarter: +41.5% (SMH +87.2%), ranked 261 of 1,360 active managers. Over three years, quarter after quarter: +161.6% (SMH +325.8%), ranked 226 of 784 active managers. Over five years, quarter after quarter: +174.3% (SMH +389.8%), ranked 163 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. Alphabet (GOOGL): $10.4B, 29.3M shares, 0.24% of the company, 4.6% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
2. Microsoft (MSFT): $10.3B, 27.7M shares, 0.37% of the company, 4.6% of its portfolio (added this quarter); held since Q4 2019 or earlier
3. Amazon (AMZN): $9.6B, 40.3M shares, 0.37% of the company, 4.3% of its portfolio (added this quarter); held since Q4 2019 or earlier
4. Apple (AAPL): $8.6B, 29.9M shares, 0.21% of the company, 3.8% of its portfolio (added this quarter); held since Q4 2019 or earlier
5. NVIDIA (NVDA): $7.0B, 34.7M shares, 0.14% of the company, 3.1% of its portfolio (added this quarter); held since Q1 2020
6. Lam Research (LRCX): $5.3B, 12.3M shares, 0.98% of the company, 2.4% of its portfolio (trimmed this quarter); held since Q2 2025
7. Sandisk (SNDK): $4.9B, 2.2M shares, 1.5% of the company, 2.2% of its portfolio (trimmed this quarter); held since Q2 2025
8. Broadcom (AVGO): $3.2B, 8.6M shares, 0.18% of the company, 1.4% of its portfolio (trimmed this quarter); held since Q2 2022
9. ASML (ASML): $2.9B, 1.5M shares, 0.38% of the company, 1.3% of its portfolio (trimmed this quarter); held since Q3 2025
10. Palantir (PLTR): $2.4B, 20.5M shares, 0.85% of the company, 1.1% of its portfolio (added this quarter); held since Q4 2024
11. Cisco (CSCO): $2.3B, 19.3M shares, 0.49% of the company, 1.0% of its portfolio (added this quarter); held since Q2 2022
12. Amphenol (APH): $2.1B, 23.8M shares, 0.96% of the company, 0.93% of its portfolio (added this quarter); held since Q1 2023
13. Salesforce (CRM): $2.1B, 13.3M shares, 1.6% of the company, 0.92% of its portfolio (added this quarter); held since Q1 2020
14. Seagate (STX): $2.1B, 2.1M shares, 0.93% of the company, 0.92% of its portfolio (added this quarter); held since Q2 2025
15. Fortinet (FTNT): $1.6B, 10.1M shares, 1.4% of the company, 0.69% of its portfolio (added this quarter); held since Q4 2019 or earlier

By sector

• Cloud & AI giants: $39.0B, 39% of its AI holdings, 6 companies
• Chips & compute: $13.8B, 14% of its AI holdings, 16 companies
• AI software: $11.3B, 11% of its AI holdings, 20 companies
• Equipment & test: $11.0B, 11% of its AI holdings, 16 companies
• Memory & storage: $7.8B, 8% of its AI holdings, 6 companies
• Interconnect: $6.6B, 7% of its AI holdings, 9 companies
• Power, electrical & cooling: $3.4B, 3% of its AI holdings, 26 companies
• Optics: $2.3B, 2% of its AI holdings, 9 companies
• Neoclouds & data centers: $2.1B, 2% of its AI holdings, 8 companies
• Servers & systems: $1.7B, 2% of its AI holdings, 10 companies

Biggest changes this quarter

• trimmed Broadcom (AVGO): -$3.8B at the quarter's price
• added to Apple (AAPL): +$3.0B at the quarter's price
• trimmed Micron (MU): -$2.5B at the quarter's price
• added to Amazon (AMZN): +$1.9B at the quarter's price
• trimmed Sandisk (SNDK): -$1.5B at the quarter's price
• added to Microsoft (MSFT): +$1.3B at the quarter's price
• added to Palantir (PLTR): +$1.2B at the quarter's price
• added to Arm Holdings (ARM): +$1.1B at the quarter's price
• trimmed KLA (KLAC): -$965.6M at the quarter's price
• added to Lumentum (LITE): +$828.6M at the quarter's price

Other holders of this size

• VanEck: $98.5B in 160 of these companies
• Berkshire Hathaway Inc: $103.7B in 2 of these companies
• Swiss National Bank: $98.3B in 201 of these companies
• JENNISON ASSOCIATES LLC: $103.9B in 110 of these companies
• SG Americas Securities, LLC: $98.1B in 215 of these companies
• HSBC HOLDINGS PLC: $105.9B in 184 of these companies
• CITIGROUP INC: $96.1B in 225 of these companies
• Janus Henderson: $110.1B in 205 of these companies

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