Institutional ownership

Institutional ownership is the percentage of a company's shares held by large organizations, such as mutual funds, pension funds, hedge funds, insurance companies, and university endowments, rather than individual retail investors trading through a personal brokerage account.

Institutional ownership tends to rise for structural reasons as much as conviction ones. Being added to a major index like the S&P 500 forces every fund that tracks that index to buy shares, regardless of what they think the company is worth. Actively managed funds also tend to concentrate in larger, more liquid, more heavily researched companies, since they need to move large amounts of capital without moving the price too much.

Higher institutional ownership is often read as a sign of validation, since professional investors have done real due diligence before buying. It also tends to add stability and liquidity to a stock's trading. But it cuts both ways: institutions can also sell in a coordinated way when sentiment shifts, and their ownership says nothing about whether the price they're paying is actually a good one, professional money gets things wrong too.