Q1 2026 13F Filing Season Starts in May: What to Watch After the Tariff Shock and AI Rotation

The Q1 2026 13F filing deadline is May 15, 2026. After a volatile first quarter marked by trade policy uncertainty, AI stock rotation, and rising bond yields, the upcoming filing season could reveal significant institutional portfolio shifts.

Key Dates

• Report period: January 1 – March 31, 2026
• Filing deadline: May 15, 2026 (45 days after quarter end)
• Early filers: Some large managers file 2-3 weeks early
• Late filers: Extensions can push filings to mid-June

What Happened in Q1 2026

Q1 2026 was dominated by several themes that will show up in institutional portfolios:

• Tariff escalation: New trade tariffs announced in February and March created uncertainty in global supply chains
• AI rotation: After two years of NVIDIA dominance, some institutions began rotating into second-derivative AI plays (power, infrastructure, application software)
• Bond yields: The 10-year Treasury yield rose above 4.5%, pressuring growth stock valuations
• Market volatility: VIX averaged higher levels than Q4 2025, suggesting defensive repositioning

What to Watch in Q1 2026 Filings

1. NVDA Position Changes

After nearly every major filer held NVDA at 5-9% in Q4 2025, watch for trims or adds. Any significant reduction by Vanguard or Fidelity would signal either market-cap decline or active rebalancing.

2. Defensive Rotation

Look for increases in utilities, healthcare, and consumer staples across institutional portfolios — classic defensive plays during uncertain macro environments.

3. Tariff Beneficiaries

Domestic manufacturers and companies with minimal China exposure may see increased institutional ownership if tariff-resilient positioning gained traction in Q1.

4. Gold and Commodities

Jane Street already held $20.5B in GLD in Q4 2025. Watch whether other institutions added commodity exposure as a macro hedge.

How to Track Filing Season

Use 13F Insight to monitor filings as they arrive. The Filers page shows the latest filing dates and AUM changes. Major filers like Berkshire Hathaway, Bridgewater, and the Big Three typically generate the most market attention.