The Q1 earnings season is underway for the real estate investment trusts (“REITs”). Companies like Prologis Inc. PLD and SL Green Realty Corp. SLG have come up with positive surprises this quarter but we have a whole bunch of REITs releasing their results next week.The releases to look forward to early next week are the S&P 500 constituents – UDR Inc. UDR, Equity Residential EQR, Public Storage PSA and Boston Properties Inc. BXP.By now it is clear that for the Finance Sector, of which REITs are part, though overall results failed to show any improvement from the prior periods, actual results managed to pull up surprises after estimates were considerably revised southward over the last three months.Growth is not reassuring and as per our Earnings Trends report, overall earnings for the Finance sector in first-quarter 2016 are expected to be down 7.2% on +1.7% higher revenues.But REITs benefit from individual market dynamics of different asset classes that they invest in. So the positive surprise at Prologis was driven by growth in same store net operating income (“NOI”) and occupancy gains in the industrial real estate sector. SL Green’s estimate beat was helped by a rise in combined same-store NOI in the office portfolio. Will others major REITs follow suit? Let’s have a look at what’s in store for them.Residential REIT UDR Inc. is scheduled to report first-quarter 2016 results on Monday, Apr 25, after the market closes. The company has an Earnings ESP of 0.00% and a Zacks Rank #3 (Hold). Though our model predicted earnings beat earlier, the current data reduces the predictive power of our model.With a vast experience in the residential real estate market, UDR is well poised to gain from the strengthening of multifamily fundamentals and favorable demographic trends. Added to this, the improvement in the job market is driving demand for apartments. The company is expected to experience growth in same-store net operating income in the first quarter, driven by a solid increase in rates but occupancy level is anticipated to remain pressured. (Read more: Is UDR Poised for a Beat this Earnings Season?) Equity Residential is slated to report first-quarter 2016 earnings after the close of market on Tuesday, Apr 26. The company has an Earnings ESP of 0.00% and a Zacks Rank #4 (Sell).Equity Residential is repositioning its portfolio and selling billions of assets. As a result, NOI is anticipated to bear the brunt of the 2016 transaction activity including the portfolio sale to Starwood. Moreover, expenses are expected to escalate, primarily due to higher seasonal operating expenses in the first quarter, leading to an adverse impact on NOI. Also, with elevated supply in certain market, new leasing is anticipated to be under pressure and pricing might be adversely impacted in these regions. (Read more: Will Equity Residential Earnings Disappoint in Q1?) Public Storage is slated to report first-quarter 2016 results on Tuesday, Apr 26, after the market closes. The company has an Earnings ESP of +1.82% and a Zacks Rank #2 (Buy).Public Storage has a strong brand image and is a recognized and established name in the self-storage industry in the U.S. Moreover, amid modest supply and healthy demand, Public Storage remains well poised to witness higher same-store revenues, backed by a rise in realized annual rent per occupied square foot and increased occupancy levels in the first quarter. Performance of the U.S. portfolio is expected to be robust and acquisition initiatives are further likely to aid growth. (Read more: Is Public Storage Set to Beat this Earnings Season?) Boston Properties Inc. is scheduled to report first-quarter 2016 results on Tuesday, Apr 26, after the market closes. The company has an Earnings ESP of +0.63% and a Zacks Rank #3. While our model could not conclusively predict earnings beat earlier, the current data increases the predictive power of our model.Boston Properties boasts a diversified tenant base, which includes several bellwethers. Given the company’s improving core operations and a better job market, we expect steady rental revenue growth in the to-be-reported quarter. However, new supply remains a concern. (Read more: Boston Properties Q1 Earnings: What is in Store?) We won’t be surprised if some of the companies deliver positive earnings surprises, as the estimates are too conservative. However, irrespective of an earnings beat or miss, investors should focus on the companies’ fundamentals.Do check back on our full write-up on earnings releases of these stocks.Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report EQUITY RESIDENT (EQR): Free Stock Analysis Report UDR INC (UDR): Free Stock Analysis Report PROLOGIS INC (PLD): Free Stock Analysis Report BOSTON PPTYS (BXP): Free Stock Analysis Report PUBLIC STORAGE (PSA): Free Stock Analysis Report SL GREEN REALTY (SLG): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research