American Century Companies, Inc.

New 13F: Q3 2026

American Century Companies, Inc. filed its 13F for the quarter ended Sep 30, 2026 on Nov 12, 2026: $81.7B in AI and semiconductor stocks; $3.4B bought and $5.0B sold against its previous quarter, at the quarter's prices.

American Century Companies, Inc. declares $81.1B in 197 of the 230 AI and semiconductor companies tracked on Silicon Floor, as of Jun 30, 2026 (Form 13F): 35.9% of its $226.3B 13F portfolio. Largest positions: NVIDIA (0.25% of the company) and Alphabet (0.21% of the company). Over time: $81.1B in 197 of these companies for Q2 2026, against $24.8B in 111 for Q4 2019 (13F values as filed). From Mar 31, 2026 to Jun 30, 2026, it bought $7.1B and sold $8.2B of these stocks, at the quarter's prices: a net sale of $1.1B; 10 new positions and 3 sold out.

Performance of its AI picks

The AI-stock portfolio American Century Companies, Inc. declared for Q2 2026 (Form 13F), held unchanged, returned +2.8% in Q3 2026 (SMH -7.1%), ranked 1042 of 1,785 active managers. Over the last 12 months, quarter after quarter: +26.9% (SMH +87.2%), ranked 810 of 1,360 active managers. Over three years, quarter after quarter: +151.0% (SMH +325.8%), ranked 329 of 784 active managers. Over five years, quarter after quarter: +155.1% (SMH +389.8%), ranked 291 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. NVIDIA (NVDA): $12.1B, 60.6M shares, 0.25% of the company, 5.4% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  2. Alphabet (GOOGL): $9.2B, 25.9M shares, 0.21% of the company, 4.1% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  3. Amazon (AMZN): $5.8B, 24.5M shares, 0.23% of the company, 2.6% of its portfolio (added this quarter); held since Q4 2019 or earlier
  4. Apple (AAPL): $5.5B, 19.1M shares, 0.13% of the company, 2.4% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  5. Microsoft (MSFT): $5.4B, 14.5M shares, 0.20% of the company, 2.4% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  6. Meta Platforms (META): $3.0B, 5.3M shares, 0.21% of the company, 1.3% of its portfolio (added this quarter); held since Q4 2019 or earlier
  7. TSMC (TSM): $3.0B, 6.2M shares, 0.12% of the company, 1.3% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  8. Broadcom (AVGO): $3.0B, 7.8M shares, 0.16% of the company, 1.3% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  9. Micron (MU): $2.4B, 2.1M shares, 0.19% of the company, 1.1% of its portfolio (added this quarter); held since Q4 2019 or earlier
  10. Applied Materials (AMAT): $2.2B, 3.0M shares, 0.38% of the company, 0.96% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  11. Lam Research (LRCX): $1.5B, 3.4M shares, 0.28% of the company, 0.66% of its portfolio (added this quarter); held since Q4 2019 or earlier
  12. Amphenol (APH): $1.2B, 13.8M shares, 0.56% of the company, 0.54% of its portfolio (added this quarter); held since Q2 2020
  13. AMD (AMD): $1.1B, 1.9M shares, 0.11% of the company, 0.48% of its portfolio (added this quarter); held since Q4 2019 or earlier
  14. Cloudflare (NET): $1.1B, 4.3M shares, 1.2% of the company, 0.46% of its portfolio (added this quarter); held since Q2 2021
  15. Vertiv (VRT): $1.0B, 3.1M shares, 0.81% of the company, 0.46% of its portfolio (trimmed this quarter); held since Q2 2023

By sector

Biggest changes this quarter

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