BAILLIE GIFFORD & CO

New 13F: Q3 2026

BAILLIE GIFFORD & CO filed its 13F for the quarter ended Sep 30, 2026 on Nov 9, 2026: $39.0B in AI and semiconductor stocks; $2.4B bought and $4.4B sold against its previous quarter, at the quarter's prices.

BAILLIE GIFFORD & CO declares $38.1B in 60 of the 230 AI and semiconductor companies tracked on Silicon Floor, as of Jun 30, 2026 (Form 13F): 34.6% of its $110.2B 13F portfolio. Largest positions: SpaceX (0.19% of the company) and NVIDIA (0.17% of the company). Over time: $38.1B in 60 of these companies for Q2 2026, against $21.1B in 15 for Q4 2019 (13F values as filed). From Mar 31, 2026 to Jun 30, 2026, it bought $1.7B and sold $2.8B of these stocks, at the quarter's prices: a net sale of $1.1B; 17 new positions and 2 sold out.

Performance of its AI picks

The AI-stock portfolio BAILLIE GIFFORD & CO declared for Q2 2026 (Form 13F), held unchanged, returned +7.5% in Q3 2026 (SMH -7.1%), ranked 278 of 1,785 active managers. Over the last 12 months, quarter after quarter: +15.3% (SMH +87.2%), ranked 1261 of 1,360 active managers. Over three years, quarter after quarter: +175.7% (SMH +325.8%), ranked 161 of 784 active managers. Over five years, quarter after quarter: +161.3% (SMH +389.8%), ranked 252 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. SpaceX (SPCX): $8.8B, 51.4M shares, 0.19% of the company, 8.0% of its portfolio
  2. NVIDIA (NVDA): $8.4B, 41.9M shares, 0.17% of the company, 7.6% of its portfolio (added this quarter); held since Q4 2019 or earlier
  3. Amazon (AMZN): $6.4B, 26.9M shares, 0.25% of the company, 5.8% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  4. Cloudflare (NET): $3.6B, 14.6M shares, 4.1% of the company, 3.2% of its portfolio (trimmed this quarter); held since Q2 2020
  5. Alphabet (GOOGL): $2.1B, 5.9M shares, 0.05% of the company, 1.9% of its portfolio (added this quarter); held since Q4 2019 or earlier
  6. Meta Platforms (META): $1.8B, 3.2M shares, 0.13% of the company, 1.6% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  7. Microsoft (MSFT): $1.0B, 2.7M shares, 0.04% of the company, 0.92% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  8. Snowflake (SNOW): $657.7M, 2.6M shares, 0.73% of the company, 0.60% of its portfolio (trimmed this quarter); held since Q3 2020
  9. Broadcom (AVGO): $513.0M, 1.4M shares, 0.03% of the company, 0.47% of its portfolio (added this quarter); held since Q1 2026
  10. Apple (AAPL): $509.4M, 1.8M shares, 0.01% of the company, 0.46% of its portfolio (added this quarter); held since Q4 2019 or earlier
  11. Tempus AI (TEM): $474.5M, 8.2M shares, 4.5% of the company, 0.43% of its portfolio (trimmed this quarter); held since Q2 2025
  12. Texas Instruments (TXN): $461.1M, 1.5M shares, 0.17% of the company, 0.42% of its portfolio (trimmed this quarter); held since Q2 2022
  13. TSMC (TSM): $458.8M, 960,732 shares, 0.02% of the company, 0.42% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  14. Comfort Systems USA (FIX): $421.5M, 212,655 shares, 0.61% of the company, 0.38% of its portfolio (trimmed this quarter); held since Q3 2023
  15. Datadog (DDOG): $350.8M, 1.3M shares, 0.37% of the company, 0.32% of its portfolio (trimmed this quarter); held since Q3 2020

By sector

Biggest changes this quarter

Schedule 13D/G declarations

  • Cloudflare (NET): 13G filed Jul 24, 2026: 14.6M shares as of Jun 30, 2026, 4.6% as declared
  • Tempus AI (TEM): 13G filed May 7, 2026: 8.6M shares as of Mar 31, 2026, 5.0% as declared
  • Aehr Test Systems (AEHR): 13G filed Feb 9, 2026: 1.3M shares as of Dec 31, 2025, 4.3% as declared
  • Mobileye (MBLY): 13G filed Feb 9, 2026: 7.4M shares as of Dec 31, 2025, 3.4% as declared
  • Cloudflare (NET): 13G filed Feb 5, 2026: 16.8M shares as of Dec 31, 2025, 5.3% as declared
  • Tempus AI (TEM): 13G filed Nov 12, 2025: 9.7M shares as of Sep 30, 2025, 5.8% as declared
  • Cloudflare (NET): 13G filed Nov 12, 2025: 21.8M shares as of Sep 30, 2025, 7.0% as declared
  • Mobileye (MBLY): 13G filed Nov 12, 2025: 10.8M shares as of Sep 30, 2025, 5.0% as declared
  • Aehr Test Systems (AEHR): 13G filed Nov 10, 2025: 1.5M shares as of Sep 30, 2025, 5.1% as declared
  • Mobileye (MBLY): 13G filed Aug 4, 2025: 13.4M shares as of Jul 31, 2025, 6.2% as declared

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