Key Takeaways
- • Thornburg Focus Growth ETF (TFGZ) holds 43 stocks with a 74.1% active share against the Russell 1000 Growth Index, demonstrating significant portfolio divergence from its benchmark through selective stock picking rather than concentration targeting.
- • Alphabet, Microsoft, and Broadcom collectively represent nearly one-quarter of TFGZ's assets, while technology overall comprises 36.7% of the portfolio—substantially underweighting the benchmark's 53.5% technology allocation.
- • Thornburg Investment Management attributes its high-conviction investment approach to its Santa Fe, New Mexico headquarters, founded by Garrett Thornburg in 1982, where institutional independence from Wall Street enables focus on company fundamentals over short-term price movements.
- • Portfolio managers Nicholas Anderson and Julian Serafini employ a three-basket construction methodology for TFGZ, with positions built only after stocks satisfy quality, valuation, and capital allocation criteria.
Summary
Thornburg Investment Management's high-conviction investment philosophy is deeply rooted in its Santa Fe, New Mexico location, where founder Garrett Thornburg established the firm in 1982. The firm contends that geographic distance from Wall Street enables its investment teams to prioritize company fundamentals over algorithm-driven price volatility and headline-driven trading patterns that dominate modern markets. This Santa Fe-based culture of independent thinking—reflecting the city's historical tradition of original thinkers and institutions like the Santa Fe Institute, which studies complex systems—fundamentally shapes how Thornburg's portfolio teams research, debate, and select securities.
The Thornburg Focus Growth ETF (TFGZ) exemplifies this approach in practice. As of July 31, 2026, the fund held 43 stocks with a 74.1% active share relative to the Russell 1000 Growth Index, indicating substantial divergence from benchmark holdings. This high active share reflects the firm's selectivity rather than a deliberate concentration strategy. Three mega-cap technology positions—Alphabet, Microsoft, and Broadcom—account for nearly 25% of fund assets. Notably, the fund's 36.7% technology weighting trails the benchmark's 53.5% allocation, positioning TFGZ as an underweight to the technology sector despite holding major technology names.
Portfolio managers Nicholas Anderson and Julian Serafini manage TFGZ through a three-basket construction framework, adding positions only after candidates clear a defined threshold for business quality, valuation, and capital allocation practices. This disciplined approach explains how concentration emerges as a byproduct of selectivity rather than as an intentional portfolio construction target. For institutional investors and advisors evaluating active versus passive exposure, TFGZ's 74.1% active share provides measurable evidence of the fund's departure from benchmark composition, quantifying the degree to which Thornburg's high-conviction methodology diverges from index-based investing.
The Thornburg Focus Growth ETF (TFGZ) exemplifies this approach in practice. As of July 31, 2026, the fund held 43 stocks with a 74.1% active share relative to the Russell 1000 Growth Index, indicating substantial divergence from benchmark holdings. This high active share reflects the firm's selectivity rather than a deliberate concentration strategy. Three mega-cap technology positions—Alphabet, Microsoft, and Broadcom—account for nearly 25% of fund assets. Notably, the fund's 36.7% technology weighting trails the benchmark's 53.5% allocation, positioning TFGZ as an underweight to the technology sector despite holding major technology names.
Portfolio managers Nicholas Anderson and Julian Serafini manage TFGZ through a three-basket construction framework, adding positions only after candidates clear a defined threshold for business quality, valuation, and capital allocation practices. This disciplined approach explains how concentration emerges as a byproduct of selectivity rather than as an intentional portfolio construction target. For institutional investors and advisors evaluating active versus passive exposure, TFGZ's 74.1% active share provides measurable evidence of the fund's departure from benchmark composition, quantifying the degree to which Thornburg's high-conviction methodology diverges from index-based investing.
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