March 19 (Reuters) - Senior housing real estate

investment trust Janus Living said on Thursday it has raised

$840 million in its upsized U.S. initial public offering after

pricing its shares at the upper end of the marketed range.

The company, carved out from healthcare REIT Healthpeak

Properties, sold 42 million shares priced at $20 apiece.

It initially planned to sell 37 million shares in the range of

$18 to $20 apiece.

Some companies are pressing ahead with their listings even

as escalating geopolitical tensions fuel volatility and unsettle

markets in recent weeks.

Rising demand for senior housing in the U.S., driven by the

elderly population planning ahead for care amid shifting

demographics, has buoyed growth prospects for companies such as

Janus.

The Denver, Colorado-based REIT operates 34 senior living

communities across 10 U.S. states, with a heavy concentration in

Florida and Texas, which together represent roughly 69% of its

portfolio.

After the offering, Healthpeak is expected to own about

214.7 million shares of Janus' common stock, giving it a roughly

83.6% voting interest in the company.

The company is set to list on the New York Stock Exchange on

Friday under the ticker "JAN". BofA Securities and J.P.Morgan

were the lead book-running managers for the offering.