LOOMIS SAYLES & CO L P

New 13F: Q3 2026

LOOMIS SAYLES & CO L P filed its 13F for the quarter ended Sep 30, 2026 on Nov 12, 2026: $34.7B in AI and semiconductor stocks; $244.4M bought and $3.1B sold against its previous quarter, at the quarter's prices.

LOOMIS SAYLES & CO L P declares $34.3B in 96 of the 230 AI and semiconductor companies tracked on Silicon Floor, as of Jun 30, 2026 (Form 13F): 43.0% of its $79.8B 13F portfolio. Largest positions: NVIDIA (0.16% of the company) and Alphabet (0.16% of the company). Over time: $34.3B in 96 of these companies for Q2 2026, against $19.8B in 67 for Q4 2019 (13F values as filed). From Mar 31, 2026 to Jun 30, 2026, it bought $1.3B and sold $1.8B of these stocks, at the quarter's prices: a net sale of $479.1M; 9 new positions and 4 sold out.

Performance of its AI picks

The AI-stock portfolio LOOMIS SAYLES & CO L P declared for Q2 2026 (Form 13F), held unchanged, returned +9.3% in Q3 2026 (SMH -7.1%), ranked 153 of 1,785 active managers. Over the last 12 months, quarter after quarter: +7.9% (SMH +87.2%), ranked 1327 of 1,360 active managers. Over three years, quarter after quarter: +140.3% (SMH +325.8%), ranked 472 of 784 active managers. Over five years, quarter after quarter: +160.3% (SMH +389.8%), ranked 256 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): $7.9B, 39.5M shares, 0.16% of the company, 9.9% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  2. Alphabet (GOOGL): $7.1B, 19.9M shares, 0.16% of the company, 8.9% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  3. Amazon (AMZN): $4.4B, 18.3M shares, 0.17% of the company, 5.5% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  4. Meta Platforms (META): $4.2B, 7.5M shares, 0.29% of the company, 5.3% of its portfolio (added this quarter); held since Q4 2019 or earlier
  5. Microsoft (MSFT): $2.9B, 7.8M shares, 0.10% of the company, 3.6% of its portfolio (added this quarter); held since Q4 2019 or earlier
  6. Oracle (ORCL): $2.4B, 16.7M shares, 0.55% of the company, 3.1% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  7. Autodesk (ADSK): $1.2B, 6.3M shares, 3.0% of the company, 1.5% of its portfolio (added this quarter); held since Q4 2019 or earlier
  8. Salesforce (CRM): $1.0B, 6.5M shares, 0.78% of the company, 1.3% of its portfolio (added this quarter); held since Q1 2020
  9. Broadcom (AVGO): $329.0M, 871,078 shares, 0.02% of the company, 0.41% of its portfolio (added this quarter); held since Q4 2019 or earlier
  10. Trane (TT): $290.6M, 591,726 shares, 0.27% of the company, 0.36% of its portfolio (added this quarter); held since Q1 2023
  11. Arm Holdings (ARM): $278.4M, 785,168 shares, 0.07% of the company, 0.35% of its portfolio (trimmed this quarter); held since Q3 2023
  12. Cummins (CMI): $253.9M, 355,936 shares, 0.26% of the company, 0.32% of its portfolio (added this quarter); held since Q1 2021
  13. TSMC (TSM): $232.2M, 486,273 shares, 0.01% of the company, 0.29% of its portfolio (trimmed this quarter); held since Q4 2020
  14. KLA (KLAC): $232.1M, 769,321 shares, 0.06% of the company, 0.29% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
  15. Advanced Energy Industries (AEIS): $118.8M, 318,553 shares, 0.79% of the company, 0.15% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier

By sector

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