Baron Asset Fund initiated a position in Vulcan Materials (VMC) as AI disruption fears and an oil spike hit growth stocks. The aggregates producer’s pricing power faces a test; next construction spending data will show if the hedge holds.
Baron Asset Fund initiated a new position in Vulcan Materials Company (NYSE: VMC) during the first quarter of 2026, a period when the fund itself declined 7.81% and the Russell Midcap Growth Index fell 6.35%. The move places the largest U.S. producer of construction aggregates into a portfolio that was hit by overexposure to software and services, sectors that sold off as AI disruption fears intensified in February and were compounded by U.S. and Israeli military action in Iran in March. The fund’s letter frames the aggregates business as a structural hedge against exactly the kind of macro uncertainty that rattled growth equities. The stock’s recent price action shows the market is not yet treating it as a pure safe haven. VMC closed at $274.54 on May 13, 2026, down 3.93% over the prior month and up only 1.28% across 52 weeks, with a market capitalization of $35.62 billion.
AlphaScala’s proprietary Alpha Score for VMC sits at 48 out of 100, a Mixed reading that captures the tension between the long-term structural case and the near-term cyclical and macro risks. For traders, the question is whether the aggregates pricing power that Baron describes can insulate the stock if the AI-sparked growth sell-off broadens into a demand shock for construction materials.
The first quarter of 2026 delivered a rapid change in market character. After a positive start to the year, February brought a sharp rotation driven by concerns about AI disruption. Software and services names, where the Baron Asset Fund was overweight, bore the brunt. In March, U.S. and Israeli military action in Iran raised fears of higher oil prices, adding a geopolitical supply shock to an already nervous tape. The fund’s underexposure to energy compounded the damage.
For a materials stock like VMC, the transmission channel is not direct AI substitution risk. It is the second-order effect: if AI-driven productivity gains or business model disruption trigger a broader economic slowdown, construction activity – and therefore demand for crushed stone, sand, and gravel – could contract. Higher oil prices, meanwhile, raise the cost of transporting heavy aggregates, potentially squeezing margins even if end-demand holds. The Baron letter does not address these risks explicitly, instead leaning on the industry’s high barriers to entry and 30-year track record of 4% average annual price increases for aggregates.
Baron Asset Fund described the position as a bet on “attractive long-term growth potential” rooted in supply constraints. The timing suggests the team views the AI disruption sell-off as an opportunity to rotate into a business they consider resilient against perceived technological threats. The letter notes that the firm “remains optimistic about the market recognizing high-quality businesses owned by the Fund, given their resilience against perceived AI threats.” VMC is being positioned as one of those high-quality businesses.
Vulcan Materials generates approximately 90% of its gross profit from mining, processing, and transporting construction aggregates – crushed stone, sand, and gravel – from quarries it owns. The remaining gross profit comes from ready-mix concrete and asphalt. The business model is built on two structural moats that Baron highlighted in detail.
The second moat is the high weight-to-price ratio of aggregates. Transportation costs are so large relative to the value of the material that the economic shipping radius is severely limited. A quarry effectively owns its local market. That geographic pricing power has translated into consistent price increases: 4% per year on average over the last 30 years, according to the fund’s letter.
The simple read is that VMC is a monopoly-like toll booth on construction activity, immune to technology disruption. The better market read acknowledges that while the permitting barrier is real, the stock still trades on cyclical construction demand. Residential, non-residential, and infrastructure spending all drive volumes. The pricing power is strongest when demand is stable or growing; in a sharp downturn, even local monopolies can see volumes fall faster than price can compensate.
At the end of the fourth quarter, 68 hedge fund portfolios held VMC, up from 54 in the prior quarter. The increase in institutional ownership suggests that the long-term aggregates thesis is gaining traction among professional managers. The stock is not among the 40 most popular hedge fund holdings heading into 2026, indicating it remains a niche conviction play rather than a crowded consensus trade.
The permitting timeline of 5 to 10 years for new quarries means that supply growth is structurally capped for at least the medium term. Even if demand accelerates, new capacity cannot come online quickly. That supply inelasticity is the core of the bull case.
On the demand side, the timeline is tied to federal, state, and local infrastructure budgets, as well as private construction cycles. The Baron letter does not provide specific infrastructure spending forecasts. The implication is that roads, highways, bridges, and residential development will continue to consume aggregates at a pace that supports above-inflation pricing.
VMC is the direct equity exposure. The stock’s one-month return of -3.93% and 52-week gain of just 1.28% show that the market has not yet rewarded the long-term pricing power narrative in the face of macro headwinds. The $35.62 billion market cap places it in the mid-to-large-cap materials space, where it competes for capital with other infrastructure-linked names.
If the AI disruption fears prove transitory and construction demand holds, the entire aggregates and cement complex could benefit. Conversely, if the growth sell-off deepens into a recession, even defensive materials stocks are unlikely to escape unscathed. The Baron fund’s own performance – down 7.81% in the quarter – shows that high-quality businesses can still be dragged lower when sector exposures are out of favor.
Several developments would weaken the bear case for VMC and support the Baron thesis:
The risk scenario that could undermine the position includes:
The Alpha Score of 48/100 (Mixed) reflects this balance of structural strengths and cyclical vulnerabilities. It is not a bearish signal. It cautions against treating VMC as a pure defensive play. The score incorporates technical, fundamental, and sentiment factors that are currently in tension.
The immediate catalyst is the next round of construction spending data and VMC’s upcoming earnings, which will reveal whether the pricing power narrative is translating into revenue and margin performance. The stock’s reaction to macro data – particularly any further AI-driven sell-offs or oil price moves – will test the resilience that Baron is betting on.
For traders watching the risk event, the key is whether VMC can decouple from the growth sell-off. If the stock holds above its recent lows while software and services continue to slide, it would confirm the safe-haven rotation that the fund is positioning for. If it breaks down in sympathy, the long-term thesis remains intact but the entry timing becomes more painful.
VMC stock page provides real-time price and Alpha Score updates. For broader context on materials and infrastructure demand, see our commodities analysis and our earlier coverage of Vulcan Materials 9% EBITDA Growth Signals Infrastructure Demand.
Prepared with AlphaScala research tooling and grounded in primary market data: live prices, fundamentals, SEC filings, hedge-fund holdings, and insider activity. Each story is checked against AlphaScala publishing rules before release. Educational coverage, not personalized advice.