Can a stock with small free float be easily manipulated?

A small free float can indeed increase the potential for market manipulation.

Here’s why:  

Limited Supply: With fewer shares available for trading, it’s easier for a small group of investors to accumulate a significant stake in the company.
Price Volatility: Large buy or sell orders can have a disproportionate impact on the stock price, leading to increased volatility.
Market Manipulation Risk: There’s a higher risk of individuals or groups artificially influencing the stock price for personal gain.

Companies whose free float is between 10% to 25% can generally be more easily manipulated by market movers.