Exhibit 99.1

Contact:

David Smith

(212) 515-7783

NEW SENIOR ANNOUNCES SECOND QUARTER 2017 RESULTS

NEW YORK – August 3, 2017 – New Senior Investment Group Inc. (“New Senior”, the “Company” or “we”) (NYSE: SNR) announced today its results for the quarter ended June 30, 2017.

SECOND QUARTER 2017 FINANCIAL HIGHLIGHTS

SECOND QUARTER 2017 BUSINESS HIGHLIGHTS

SECOND QUARTER 2017 RESULTS

Dollars in thousands, except per share data

1

SECOND QUARTER 2017 GAAP RESULTS

New Senior recorded GAAP net income of $3.1 million, or $0.04 per diluted share, for the second quarter of 2017, compared to a GAAP net loss of $27.4 million, or $(0.33) per diluted share, for the second quarter of 2016. The year-over-year increase in the second quarter net income was primarily driven by a gain on sale of real estate of $18.3 million and a decrease in expenses of $16.4 million.

SECOND QUARTER 2017 PORTFOLIO PERFORMANCE

Total NOI decreased 4.0% to $55.6 million compared to $57.9 million for 2Q 2016. Total same store cash NOI decreased 1.7% to $50.0 million compared to $50.9 million for 2Q 2016.

For the managed portfolio, same store average occupancy decreased 270 basis points to 86.2% compared to 88.9% for 2Q 2016, and same store RevPOR increased 2.1% to $3,009 compared to $2,946 for 2Q 2016. Same store cash NOI decreased 6.5% to $26.3 million compared to $28.1 million for 2Q 2016.

For the triple net portfolio, same store cash NOI increased 4.3% to $23.7 million compared to $22.8 million for 2Q 2016. Same store triple net average occupancy decreased 180 basis points to 87.0% compared to 88.8% for 2Q 2016. EBITDARM coverage as of June 30, 2017 was 1.17x, down from 1.24x as of June 30, 2016. Triple net average occupancy and EBITDARM coverage are presented one quarter in arrears on a trailing twelve month basis.

OPERATOR TRANSITIONS

During the second quarter, the Company transitioned the operators of four underperforming properties (three AL/MC and one IL) to two operators. Three of the properties were transitioned to Grace Management, a new operator relationship for the Company, and the remaining property was transitioned to Watermark, an existing operator relationship.

ASSET SALES

In June, the Company completed the sale of two properties for $33.0 million, realizing a gain on sale of $18.3 million. In connection with the sale, the Company repaid $13.2 million of debt.

SECOND QUARTER DIVIDEND

On August 1, 2017, the Company’s Board of Directors declared a cash dividend of $0.26 per share for the quarter ended June 30, 2017. The dividend is payable on September 22, 2017 to shareholders of record on September 8, 2017.

ADDITIONAL INFORMATION

For additional information that management believes to be useful for investors, please refer to the presentation posted in the Investor Relations section of the Company’s website, www.newseniorinv.com.

EARNINGS CONFERENCE CALL

Management will host a conference call on August 3, 2017 at 9:00 A.M. Eastern Time. The conference call may be accessed by dialing (877) 694-6694 (from within the U.S.) or (970) 315-0985 (from outside of the U.S.) ten minutes prior to the scheduled start of the call; please reference “New Senior Second Quarter 2017 Earnings Call.” A simultaneous webcast of the conference call will be available to the public on a listen-only basis at www.newseniorinv.com. Please allow extra time prior to the call to visit the website and download any necessary software required to listen to the internet broadcast.

A telephonic replay of the conference call will also be available approximately two hours following the completion of the call through 11:59 P.M. Eastern Time on September 6, 2017 by dialing (855) 859-2056 (from within the U.S.) or (404) 537-3406 (from outside the U.S.); please reference access code “37039008.”

ABOUT NEW SENIOR

New Senior is a real estate investment trust with a portfolio of 148 senior housing properties located across 37 states as of June 30, 2017. The Company is the only pure play senior housing REIT and is one of the largest owners of senior housing properties. New Senior is managed by an affiliate of Fortress Investment Group LLC, a global investment management firm. More information about New Senior can be found at www.newseniorinv.com.

2

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain items in this press release may constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are not historical facts. They represent management’s current expectations regarding future events and are subject to a number of trends and uncertainties, many of which are beyond our control, that could cause actual results to differ materially from those described in the forward-looking statements. Accordingly, you should not place undue reliance on any forward-looking statements contained herein. For a discussion of some of the risks and important factors that could affect such forward-looking statements, see the sections entitled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the Company’s annual and quarterly reports filed with the Securities and Exchange Commission, which are available on the Company’s website (www.newseniorinv.com). New risks and uncertainties emerge from time to time, and it is not possible for New Senior to predict or assess the impact of every factor that may cause its actual results to differ from those contained in any forward-looking statements. Forward-looking statements contained herein speak only as of the date of this press release, and New Senior expressly disclaims any obligation to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in New Senior’s expectations with regard thereto or change in events, conditions or circumstances on which any statement is based.

3

Consolidated Balance Sheets

(dollars in thousands, except share data)

4

Consolidated Statements of Operations (unaudited)

(dollars in thousands, except share data)

5

Consolidated Statements of Cash Flows (unaudited)

(dollars in thousands)

6

Reconciliation of NOI to Net Income

(dollars in thousands)

Reconciliation of Net Income to FFO, Normalized FFO, AFFO and Normalized FAD

(dollars and shares in thousands, except per share data)

7

Reconciliation of Year-over-Year Cash NOI (unaudited)

(dollars in thousands)

NON-GAAP FINANCIAL MEASURES

The tables above set forth reconciliations of non-GAAP measures to net income (loss), which is the most directly comparable GAAP financial measure.

A non-GAAP financial measure is a measure of historical or future financial performance, financial position or cash flows that excludes or includes amounts that are not excluded from or included in the most comparable GAAP measure. We consider certain non-GAAP financial measures to be useful supplemental measures of our operating performance. GAAP accounting for real estate assets assumes that the value of real estate assets diminishes predictably over time, even though real estate values historically have risen or fallen with market conditions. As a result, many industry investors look to non-GAAP financial measures for supplemental information about real estate companies.

You should not consider non-GAAP measures as alternatives to GAAP net income, which is an indicator of our financial performance, or as alternatives to GAAP cash flow from operating activities, which is a liquidity measure, nor are non-GAAP measures necessarily indicative of our ability to satisfy our funding requirements. In order to facilitate a clear understanding of our consolidated historical operating results, you should examine our non-GAAP measures in conjunction with GAAP net income as presented in our Consolidated Financial Statements and other financial data included elsewhere in this report. Moreover, the comparability of non-GAAP financial measures across companies may be limited as a result of differences in the manner in which real estate companies calculate such measures, the capital structure of such companies or other factors.

Below is a description of the non-GAAP financial measures presented herein.

NOI AND CASH NOI

The Company evaluates the performance of each of its two business segments based on NOI. The Company defines NOI as total revenues less property-level operating expenses, which include property management fees and travel cost reimbursements. The sum of the NOI for each segment is total NOI, which the Company uses to evaluate the aggregate performance of its segments.

The Company defines cash NOI as NOI excluding the effects of straight-line rent, amortization of above / below market lease intangibles and amortization of deferred community fees and other, which includes the net change in deferred community fees and other rent discounts or incentives. We believe that NOI and cash NOI serve as useful supplemental measures to net income because they allow investors, analysts and management to measure unlevered property-level operating results and to compare our operating results between periods and to the operating results of other real estate companies on a consistent basis.

8

Same store NOI and same store cash NOI include only properties owned for the entirety of comparable periods. Properties acquired, sold, transitioned to other operators or classified as held for sale during the comparable periods are excluded from the same store amounts.

FFO and Other Non-GAAP Measures

We use Funds From Operations (“FFO”) and Normalized FFO as supplemental measures of our operating performance. We use the National Association of Real Estate Investment Trusts (“NAREIT”) definition of FFO. NAREIT defines FFO as GAAP net income excluding gains (losses) from sales of depreciable real estate assets and impairment charges of depreciable real estate, plus real estate depreciation and amortization, and after adjustments for unconsolidated entities and joint ventures to reflect FFO on the same basis. FFO does not account for debt principal payments and is not intended as a measure of a REIT’s ability to satisfy such payments or any other cash requirements.

Normalized FFO, as defined below, measures the financial performance of our portfolio of assets excluding items that, although incidental to, are not reflective of the day-to-day operating performance of our portfolio of assets. We believe that Normalized FFO is useful because it facilitates the evaluation of our portfolio’s operating performance (i) between periods on a consistent basis and (ii) to the operating performance of other real estate companies. However, comparability may be limited because our calculation of Normalized FFO may differ significantly from that of other companies, or because of features of our business that are not present in other companies.

We define Normalized FFO as FFO excluding the following income and expense items, as applicable: (a) acquisition, transaction

and integration related costs and expenses; (b) the write off of unamortized discounts, premiums, deferred financing costs, or additional costs, make whole payments and penalties or premiums incurred as the result of early repayment of debt (collectively

“Gain (Loss) on extinguishment of debt”); (c) incentive compensation recognized as a result of sales of property and (d) other items that we believe are not indicative of operating performance, generally reported as “Other (income) expense” in the Consolidated Statements of Operations.

Management also uses AFFO and Normalized FAD as supplemental measures of the Company’s operating performance.

We define AFFO as Normalized FFO excluding the impact of the following: (a) straight-line rents; (b) amortization of above / below market lease intangibles; (c) amortization of deferred financing costs; (d) amortization of premium on mortgage notes payable and (e) amortization of deferred community fees and other, which includes the net change in deferred community fees and other rent discounts or incentives. We believe AFFO is useful because it facilitates the evaluation of (i) the current economic return on our portfolio of assets between periods on a consistent basis and (ii) our portfolio versus those of other real estate companies that report AFFO. However, comparability may be limited because our calculation of AFFO may differ significantly from that of other companies, or because of features of our business that are not present in other companies.

We define Normalized FAD as AFFO less routine capital expenditures, which we view as a cost associated with the current economic return. Normalized FAD, which does not reflect debt principal payments and certain other expenses, does not represent cash available for distribution to shareholders.

9