Which 5 Companies Are Most Likely to Split Shares in 2026? A Stock Split Calendar Preview

Why 2026 Could Be a Banner Year for Stock Splits

Stock splits have made a comeback in investor conversations, even as fractional share ownership has reduced their technical necessity. Companies continue to pursue splits for strategic reasons: lowering share prices makes employee stock option programs more attractive, and maintaining accessibility appeals to retail investors. The excitement surrounding a split announcement typically triggers a short-term price rally, though the real driver of long-term value remains the underlying business performance.

With several blue-chip and mega-cap stocks trading at elevated price levels, 2026 presents an intriguing stock split calendar scenario. Here are five companies that could reshape their share structure in the coming year.

The Tech Giant Playing Catch-Up: Microsoft

Trading near $500 per share, Microsoft (NASDAQ: MSFT) remains overdue for a stock split. The company's last split occurred over two decades ago in 2003.

Microsoft's recent stock appreciation stems from its dominant position in the artificial intelligence revolution. As the primary cloud infrastructure provider through its Azure services and a major OpenAI investor, Microsoft stands to benefit significantly if OpenAI's valuation increases through a potential public offering. These catalysts create multiple pathways for continued appreciation in 2026, making Microsoft an interesting candidate for a split announcement—and a compelling investment thesis independent of that event.

The Latin American E-Commerce Behemoth: MercadoLibre

MercadoLibre (NASDAQ: MELI) commands the highest valuation on this list, with shares trading around $2,000 each. Notably, this company has never executed a stock split despite maintaining prices above $1,000 for years, suggesting possible reluctance toward such action.

Yet MercadoLibre's operational achievements cannot be overstated. The platform successfully constructed a comprehensive e-commerce infrastructure across Latin America that competes with global giants like Amazon, complemented by an integrated payments ecosystem. After a relatively muted 2025 performance, 2026 could bring renewed momentum—split or otherwise.

The Dow's Heavyweight Problem: Goldman Sachs and Caterpillar

Two Dow Jones Industrial Average constituents present an interesting paradox tied to the index's unique price-weighting methodology.

Goldman Sachs (NYSE: GS), trading near $850, currently functions as the largest single component of the Dow, representing approximately 11% of the entire index's weighting. The company faces a decision: embrace this outsized influence or reduce it through a split.

Caterpillar (NYSE: CAT), at roughly $600 per share, holds the second-largest position, commanding nearly 8% of the index. Together with Microsoft, these three companies account for roughly 25% of the Dow's total weight despite comprising just 10% of its constituent companies.

This concentration raises questions about index balance. A stock split by either—or both—companies could rebalance this equation, potentially becoming necessary if their price escalation continues. For investors monitoring the stock split calendar, these two Dow components warrant close attention.

The Retailer Seeking Entry: Costco Wholesale

Costco Wholesale (NASDAQ: COST) trades around $900 per share following a recent pullback from all-time highs. The company's last split happened 25 years ago in 2000, making it arguably the most overdue for action on this list.

While Costco currently sits outside the Dow Jones index, industry observers believe the company may pursue Dow inclusion as a strategic goal. Stock price reduction through a split could serve as a prerequisite for that elevation in status, making 2026 a realistic window for such an announcement.

Key Takeaway

The 2026 stock split calendar could feature announcements from multiple mega-cap companies, each facing distinct circumstances and strategic considerations. While no split is guaranteed, the convergence of elevated share prices, strategic incentives, and market positioning suggests heightened probability for at least some of these five companies. Investors tracking this space should monitor earnings calls and corporate guidance for any hints of forthcoming splits.