Innkeepers USA Trust
The price represents a premium of 8% over Innkeepers' closing price of $16.45 on Friday.
Including assumed debt, the deal is worth $1.5 billion, Innkeepers said.
"Innkeepers provides stable, long-term cash flow making it a valuable investment for AIC's shareholders," James Zelter, chief operating officer of Apollo, said in a statement.
Innkeepers, which owns 74 hotels, said it will pay its first-quarter common share dividend on April 24 and has agreed to suspend any further common share dividends.
The deal is expected to be completed in the second quarter.