EXHIBIT 99.1

Selective Reports Net Income per Diluted Share of $0.81 and Operating Income¹ per Diluted Share of $0.81 for the Third Quarter of 2015

Improves Full Year Ex-Catastrophe Statutory Combined Ratio Guidance to 89%

Increases Quarterly Shareholder Dividend 7%

In the third quarter of 2015:

Branchville, NJ – October 28, 2015 – Selective Insurance Group, Inc. (NASDAQ: SIGI) today reported its financial results for the third quarter ended September 30, 2015. Net income per diluted share was $0.81, compared to $0.93 in 2014, and operating income¹ per diluted share grew 7% to $0.81, compared to $0.76 in 2014.

“The strong third quarter and year-to-date results reflect the successful execution of our strategies to achieve rate increases that outpace the industry, to improve underwriting mix and to enhance claim outcomes. We have a consistent track record of achieving our goals and this quarter was no exception. For the first time in my 35-year career at Selective, after-tax underwriting income exceeded after-tax net investment income this quarter,” said Gregory E. Murphy, Chairman and Chief Executive Officer. “We are proud of our performance and in recognition of the continuing strong results, the Board of Directors has approved a 7% increase in the quarterly dividend to $0.15 per share payable December 1, 2015 to shareholders of record as of November 13, 2015.”

Murphy continued, “For the third quarter, we generated a profitable 90.5% statutory combined ratio, or 89.2% excluding catastrophe losses. Based on the strength of our statutory underwriting results for the last nine months, we are improving our full year ex-catastrophe statutory combined ratio target to 89% from our original 2015 guidance of 91%.

“Growth in the quarter was solid, as overall net premiums written increased 10% driven by improving retention levels, an 18% increase in Standard Commercial Lines new business production, 36% growth in E&S premiums written, and 3.5% overall year-to-date renewal pure price increases. For 2015, we expect to achieve overall renewal pure price between 3.0% and 3.5%,” Murphy concluded.

¹Operating income differs from net income by the exclusion of realized gains and losses on investments. It is used as an important financial measure by management, analysts, and investors, because the realization of investment gains and losses on sales in any given period is largely discretionary as to timing. In addition, these investment gains and losses, as well as other-than-temporary investment impairments that are charged to earnings, could distort the analysis of trends. Operating income is not intended as a substitute for net income prepared in accordance with U.S. generally accepted accounting principles (GAAP). A reconciliation of operating income to net income is provided in the Consolidated Financial Results table. Statutory data is prepared in accordance with statutory accounting rules as defined by the National Association of Insurance Commissioners Accounting Practices and Procedures Manual and, therefore, is not reconciled to GAAP.

Note: All amounts included in this release exclude intercompany transactions.

Operating Highlights

Standard Commercial Lines

Standard Commercial Lines premiums, which represent 78% of total net premiums written, were up 10% in the third quarter from a year ago, driven by an 18% increase in new business to $84 million, renewal pure price increases of 2.8%, and a strong 84% retention. The quarter’s statutory combined ratio improved by 2.5 points, largely due to earned rate continuing to exceed expected loss inflation, favorable prior year casualty reserve development of 4.9 points compared to 2.8 points in the year-ago period, and lower catastrophe losses.

Standard Personal Lines

Standard Personal Lines premiums, which represent 14% of total net premiums written, decreased 3% in the quarter compared to the third quarter of 2014, largely driven by targeted non-renewals of less profitable accounts coupled with a decrease in new business. Retention improved by two points to 83% and renewal pure price was 5.4%. We continue to see improvements in the participation rate in the Selective Edge^TM product.

The statutory combined ratio in Standard Personal Lines was 95.0%, which included 8.0 points of catastrophe losses. There was no prior year casualty reserve development this quarter in Standard Personal Lines, although there was favorable prior year casualty reserve development of $2 million, or 2.7 combined ratio points, in the third quarter of 2014.

Excess and Surplus Lines

Our Excess and Surplus lines business, which represents 8% of net premiums written, reported a 36% increase in net premiums written in the quarter. Effective July 1, we included E&S in our main property and casualty excess of loss reinsurance treaties. As a result, it is more reflective of actual growth this quarter to look at it on a direct basis, or a 27% increase in direct premiums written. New business growth was very strong recording a 26% increase. The statutory combined ratio in the third quarter improved by 1.8 points from the same period in 2014 to 101.1%, including adverse prior year casualty reserve development of $4 million, or 8.7 points.

Investment Income

After-tax investment income in the third quarter was $25 million, down 5% compared to the same period a year ago. Investment income was negatively impacted by lower returns from the alternative investments portfolio, which continues to be impacted by declining oil prices and the portfolio’s exposure to energy-exposed limited partnerships. The after-tax annualized yield on the fixed income portfolio was 2.1% compared with 2.3% a year ago reflecting the continued low interest rate environment. The total annualized after-tax portfolio yield declined to 1.9% from 2.3% a year ago due to alternative investment results along with the declining interest rate environment.

Balance Sheet

The increase in book value reflects $2.08 in net income, partially offset by a $0.51 reduction in unrealized investment gains and $0.42 in shareholders’ dividends.

Selective’s Board of Directors declared a $0.15 per share quarterly cash dividend on common stock payable December 1, 2015, to stockholders of record as of November 13, 2015.

Guidance

For 2015, Selective expects to generate the following results:

The supplemental investor package, including financial information that is not part of this press release, is available on the Investor Relations’ page of Selective’s public website at www.selective.com. Selective’s quarterly analyst conference call will be simulcast at 8:30 a.m. ET, on October 29, 2015 at www.selective.com. The webcast will be available for rebroadcast until the close of business on December 1, 2015.

About Selective Insurance Group, Inc.

Selective Insurance Group, Inc. is a holding company for ten property and casualty insurance companies rated “A” (Excellent) by A.M. Best. Through independent agents, the insurance companies offer standard and specialty insurance for commercial and personal risks, and flood insurance underwritten by the National Flood Insurance Program. Selective maintains a website at www.selective.com.

Forward-Looking Statements

In this press release, Selective and its management discuss and make statements based on currently available information regarding their intentions, beliefs, current expectations and projections regarding Selective's future operations and performance.

Certain statements in this report, including information incorporated by reference, are “forward-looking statements” as that term is defined in the Private Securities Litigation Reform Act of 1995 ("PSLRA"). The PSLRA provides a safe harbor under the Securities Act of 1933 and the Securities Exchange Act of 1934 for forward-looking statements. These statements relate to our intentions, beliefs, projections, estimations or forecasts of future events or our future financial performance and involve known and unknown risks, uncertainties and other factors that may cause our or our industry’s actual results, levels of activity, or performance to be materially different from those expressed or implied by the forward-looking statements. In some cases, you can identify forward-looking statements by use of words such as “may,” “will,” “could,” “would,” “should,” “expect,” “plan,” “anticipate,” “target,” “project,” “intend,” “believe,” “estimate,” “predict,” “potential,” “pro forma,” “seek,” “likely” or “continue” or other comparable terminology. These statements are only predictions, and we can give no assurance that such expectations will prove to be correct. We undertake no obligation, other than as may be required under the federal securities laws, to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Factors that could cause our actual results to differ materially from those projected, forecasted or estimated by us in forward-looking statements, include, but are not limited to:

These risk factors may not be exhaustive. We operate in a continually changing business environment, and new risk factors emerge from time-to-time. We can neither predict such new risk factors nor can we assess the impact, if any, of such new risk factors on our businesses or the extent to which any factor or combination of factors may cause actual results to differ materially from those expressed or implied in any forward-looking statements in this report. In light of these risks, uncertainties and assumptions, the forward-looking events discussed in this report might not occur.

Selective’s SEC filings can be accessed through the Investor Relations’ section of Selective’s website, www.selective.com, or through the SEC’s EDGAR Database at www.sec.gov (Selective EDGAR CIK No. 0000230557).

Investor and Media Contact:

Jennifer DiBerardino

973-948-1364

jennifer.diberardino@selective.com

Selective Insurance Group, Inc.

40 Wantage Avenue

Branchville, New Jersey 07890

www.selective.com

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