Baron Partners Fund: Latest Insights and Commentary

U.S. equity markets were volatile during the quarter, as positive sentiment and strong performance in January were undermined by AI-related disruption fears and geopolitical tensions. Small and mid caps generated positive returns in the first quarter while large caps declined, a margin of outperformance for small and mid caps not seen since the COVID rally in late 2020 and early 2021. 

The year began with positive momentum for U.S. stocks, supported by easing inflation, resilient economic trends, strong corporate earnings, and investor optimism about the Trump administration’s stimulative economic strategy. Market sentiment began to shift in February, with the early catalyst being widespread losses across a range of industries due to fears about AI-driven disruption. Technology and software companies experienced notable pressure as investors worried AI agents could directly replace human-led business workflows. The sell-off worsened after the U.S. and Israel attacked Iran on February 28. Investors became concerned about the potential for sustained inflation and reduced economic growth from surging oil prices and supply chain disruptions. 

Against this backdrop, the dominant market trend was the continued rotation out of the Magnificent Seven, software, and other growth-oriented stocks. The Magnificent Seven complex declined 11.3%, accounting for about 90% of the cap-weighted S&P 500 Index’s losses. Microsoft (-23.3%), Tesla (-17.3%), Meta (-13.3%), Amazon (-9.8%), and Alphabet (-8.1%) suffered the largest losses. The non-Magnificent Seven stocks in the Index were down only 0.6% for the month. 

Looking ahead, we remain focused on well-managed companies with durable competitive advantages and attractive growth prospects. While macroeconomic and policy uncertainty persist, we believe maintaining a disciplined, long-term perspective and emphasizing company fundamentals will be essential to navigating the evolving landscape. 

CONTRIBUTORS

• Space Exploration Technologies Corp. (SpaceX) is a high-profile private company founded by Elon Musk. The company's primary focus is on developing and launching advanced rockets, satellites, and spacecrafts, with the ambitious long-term goal of making life multi-planetary. SpaceX is generating significant value with the rapid expansion of its Starlink broadband service. The company is successfully deploying a vast constellation of Starlink satellites in Earth's orbit, reporting substantial growth in active users, and regularly deploying new and more efficient hardware technology. Furthermore, SpaceX has established itself as a leading launch provider by offering highly reliable and cost-effective launches, leveraging the company's reusable launch technology. SpaceX capabilities extend to strategic services such as human spaceflight missions. Moreover, SpaceX is making tremendous progress on its newest rocket, Starship, which is the largest, most powerful rocket ever flown. This next-generation vehicle represents a significant leap forward in reusability and space exploration capabilities. We value SpaceX using prices of recent financing transactions.
• Global hotel franchisor Choice Hotels International, Inc. contributed to performance during the quarter as the company saw a slight acceleration in revenue per available room across its portfolio. Choice continues to grow units at a low-single-digit rate and is benefiting from higher royalty rates on new franchise contracts, driving mid-single-digit growth in earnings and free cash flow. The company is using this cashflow to return capital through share repurchases. We continue to believe the stock offers compelling value, trading at a roughly five multiple-point discount to its historical average. Choice maintains a strong balance sheet, providing flexibility for additional share buybacks, particularly when the stock trades below the company’s view of intrinsic value. Choice’s steady growth profile, both domestically and internationally, should further support attractive shareholder returns over time.
• Specialty insurer Arch Capital Group Ltd. contributed to performance as property and casualty (P&C) insurance stocks broadly outpaced the market amid heightened volatility. P&C insurance stocks tend to be resilient during turbulent markets and are less exposed to the AI-related concerns weighing on other sectors. In addition, Arch reported better-than-expected quarterly earnings, and management expects a continuation of double-digit growth in book value per share. We continue to own the stock due to Arch’s strong management team and our expectation of continued growth in earnings and book value over time.

DETRACTORS

• Tesla, Inc. designs, manufactures, and sells fully electric vehicles (EVs), solar products, and energy storage solutions, while developing advanced real-world AI technologies. Following robust gains in late 2025, shares fell as investors awaited progress on robotaxis and assessed the company’s sizable investments in manufacturing and AI. Operationally, Tesla delivered strong quarterly results amid a challenging EV environment. Automotive gross margins improved sequentially and beat expectations, the energy storage business maintained robust momentum with best-in-class margins, and battery cell production ramped. The company continues to advance its AI and autonomous driving initiatives at a rapid pace. Management anticipates meaningful robotaxi expansion in 2026 and continues to finalize the Optimus Gen 3 design and build out large-scale manufacturing capacity for humanoid robots. Tesla is also releasing major Full Self-Driving (FSD) enhancements, scaling AI training compute, and deepening vertical integration in semiconductor design and production. These initiatives, while increasing near-term capital spending, underscore Tesla’s pivot toward becoming a leader in physical AI.
• CoStar Group, Inc. is the leading provider of information and marketing services to the commercial and residential real estate industries. Shares fell due to multiple compression driven by rising AI fears. The market has come to view AI as an existential risk for a growing number of industries—including software, business services, information services, and video games—despite no evidence of any fundamental impact to these sectors. This “shoot first and ask questions later” dynamic has resulted in meaningful share price declines. We continue to own CoStar given its differentiated data assets and significant growth opportunities in providing enhanced real estate information, analytics, and marketplace offerings. CoStar boasts an enviable business model with high levels of recurring revenue and meaningful cash flow generation potential. While near-term cash flow is obscured by elevated investment in Homes.com, we expect spending to moderate and cash flow to improve over the next several years. The company also maintains a substantial cash balance, which we are hopeful will be used to aggressively repurchase shares at current depressed valuation levels.
• Syndicated research provider Gartner, Inc. detracted from performance as valuation multiples compressed amid rising concerns around AI. Investors have increasingly viewed AI as a potential existential risk across a widening range of industries—including software, business services, information services, and video games—despite no evidence of any fundamental impact to these sectors. This “shoot first and ask questions later” dynamic has driven meaningful share price declines across the group. Against this backdrop, shares of Gartner came under pressure after the company reported contract value growth that was just 0.5% below expectations, underscoring the dramatic valuation compression at play. We continue to own Gartner given its large addressable market, significant competitive advantages, and robust free cash flow generation, which we expect management to deploy toward share repurchases at depressed valuation levels. We also view Gartner as an AI beneficiary, as it can leverage emerging tools to extract deeper insights from its vast trove of proprietary data and deliver it to customers in chatbot-type formats that meaningfully enhance its value proposition.

The Quarterly Attribution Analysis for period ending March 31, 2026, is not yet available.