What Are 13F Filings?
Every big investment firm that manages more than $100 million has to file a report called a "13F" with the government every three months. This report shows all the stocks they own.
This covers hedge funds, mutual funds, pension funds, and more. When someone like Warren Buffett adds a new stock, the 13F filing is how the rest of us find out.
What to Look For
The most useful thing isn't what they own — it's what changed since last time:
- •New positions: When a big fund starts buying a stock for the first time, it means they've done serious research and believe in it.
- •Adding more: If they already owned it and bought even more, that shows growing belief.
- •Full exits: When they sell everything, that's more meaningful than small trims.
- •Many funds moving together: If several big funds all start buying the same stock, pay attention.
What "Whales" Means
In investing, "whales" are the biggest players — funds managing billions of dollars. When a whale starts buying a mid-sized stock, the buying pressure alone can push the price up. When they sell, the extra supply can push it down.
Tracking whales gives you a peek at what the "smart money" is thinking. But remember: 13F reports come out 45 days after the quarter ends, so the information is at least 6 weeks old.
How to Use This Wisely
Use institutional data to confirm your own analysis. If your TrustScore research shows a stock looks good and big funds are buying it too, that's a strong combination.
Don't blindly copy what big funds do. They have different goals, risk budgets, and they often hedge in ways you can't see from just the 13F data.