BAMCO INC /NY/

BAMCO INC /NY/ declares $29.5B in 51 of the 230 AI and semiconductor companies tracked on Silicon Floor, as of Jun 30, 2026 (Form 13F): 44.3% of its $66.6B 13F portfolio. Largest positions: SpaceX (0.54% of the company) and NVIDIA (0.01% of the company). Over time: $29.5B in 51 of these companies for Q2 2026, against $1.2B in 31 for Q4 2019 (13F values as filed). From Mar 31, 2026 to Jun 30, 2026, it bought $476.4M and sold $436.2M of these stocks, at the quarter's prices: a net purchase of $40.1M; 6 new positions and 4 sold out.

Performance of its AI picks

The AI-stock portfolio BAMCO INC /NY/ declared for Q2 2026 (Form 13F), held unchanged, returned -9.9% in Q3 2026 (SMH -7.1%). Over the last 12 months, quarter after quarter: +14.7% (SMH +87.2%). Over three years, quarter after quarter: +163.9% (SMH +325.8%). Over five years, quarter after quarter: +122.3% (SMH +389.8%). 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): $24.9B, 145.8M shares, 0.54% of the company, 37.4% of its portfolio
2. NVIDIA (NVDA): $593.3M, 3.0M shares, 0.01% of the company, 0.89% of its portfolio (added this quarter); held since Q4 2019 or earlier
3. Amazon (AMZN): $466.3M, 2.0M shares, 0.02% of the company, 0.70% of its portfolio (added this quarter); held since Q4 2019 or earlier
4. Alphabet (GOOGL): $386.6M, 1.1M shares, 0.01% of the company, 0.58% of its portfolio (added this quarter); held since Q4 2019 or earlier
5. Vertiv (VRT): $328.1M, 979,821 shares, 0.25% of the company, 0.49% of its portfolio (trimmed this quarter); held since Q1 2020
6. TSMC (TSM): $318.9M, 667,698 shares, 0.01% of the company, 0.48% of its portfolio (added this quarter); held since Q4 2019 or earlier
7. Amphenol (APH): $281.8M, 3.2M shares, 0.13% of the company, 0.42% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
8. Quanta Services (PWR): $227.4M, 315,789 shares, 0.21% of the company, 0.34% of its portfolio (trimmed this quarter); held since Q1 2023
9. Equinix (EQIX): $203.9M, 195,637 shares, 0.20% of the company, 0.31% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
10. Broadcom (AVGO): $194.4M, 514,536 shares, 0.01% of the company, 0.29% of its portfolio (trimmed this quarter); held since Q1 2022
11. Datadog (DDOG): $132.4M, 508,356 shares, 0.14% of the company, 0.20% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
12. Meta Platforms (META): $131.4M, 233,313 shares, 0.01% of the company, 0.20% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
13. GDS Holdings (GDS): $127.5M, 4.2M shares, 2.1% of the company, 0.19% of its portfolio (trimmed this quarter); held since Q1 2024
14. Cloudflare (NET): $115.7M, 471,598 shares, 0.13% of the company, 0.17% of its portfolio (added this quarter); held since Q4 2019 or earlier
15. indie Semiconductor (INDI): $103.3M, 23.0M shares, 9.6% of the company, 0.15% of its portfolio (trimmed this quarter); held since Q2 2021

By sector

• Cloud & AI giants: $25.9B, 88% of its AI holdings, 6 companies
• Chips & compute: $1.4B, 5% of its AI holdings, 12 companies
• Power, electrical & cooling: $627.1M, 2% of its AI holdings, 6 companies
• AI software: $525.1M, 2% of its AI holdings, 11 companies
• Neoclouds & data centers: $445.1M, 2% of its AI holdings, 6 companies
• Interconnect: $299.0M, 1% of its AI holdings, 2 companies
• Equipment & test: $215.4M, 1% of its AI holdings, 5 companies
• Memory & storage: $50.0M, 0% of its AI holdings, 1 company
• Optics: $42.5M, 0% of its AI holdings, 2 companies

Biggest changes this quarter

• added to Alphabet (GOOGL): +$201.2M at the quarter's price
• added to Amazon (AMZN): +$157.7M at the quarter's price
• trimmed Vertiv (VRT): -$67.4M at the quarter's price
• trimmed Equinix (EQIX): -$50.4M at the quarter's price
• trimmed Advanced Energy Industries (AEIS): -$48.2M at the quarter's price
• added to Micron (MU): +$46.2M at the quarter's price
• trimmed Digital Realty (DLR): -$40.2M at the quarter's price
• trimmed AAON (AAON): -$38.1M at the quarter's price
• trimmed SiTime (SITM): -$34.9M at the quarter's price
• trimmed Iron Mountain (IRM): -$27.1M at the quarter's price

Other holders of this size

• Gigafund Management Company, LLC: $29.4B in 1 of these companies
• STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM: $29.8B in 195 of these companies
• CANADA LIFE ASSURANCE Co: $29.1B in 138 of these companies
• Mariner, LLC: $29.8B in 170 of these companies
• LAZARD ASSET MANAGEMENT LLC: $28.8B in 179 of these companies
• PNC Financial Services Group, Inc.: $30.4B in 217 of these companies
• Quantinno Capital Management LP: $28.5B in 205 of these companies
• Ensign Peak Advisors, Inc: $30.9B in 184 of these companies

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