Exhibit 99.1

Heritage Insurance Holdings Reports Financial Results for Fourth Quarter and Full Year 2015;

Declares Quarterly Dividend of $0.05 Per Share

Clearwater, FL: Heritage Insurance Holdings, Inc. (NYSE:HRTG) (“Heritage” or the “Company”), a property and casualty insurance holding company, today reported its financial results for the quarter and year ended December 31, 2015.

Highlights

Bruce Lucas, the Company’s Chairman and CEO, said, “2015 was a record year for Heritage. We grew net income 96% and delivered a return on average equity of 30.2%. Results for the year were driven by our continued market share expansion in the state of Florida. As we progress into 2016, we expect to capitalize on opportunities to serve customers in new key states. Heritage is now licensed to write new business in North and South Carolina, we have been approved in Alabama and Mississippi, and we have applications pending in Massachusetts and Georgia. The Form A acquisition filing with the State of Hawaii Insurance Division has been approved, and we expect to close the previously announced Zephyr Insurance Company transaction during the first quarter of 2016. We remain focused on executing our expansion plans while delivering solid returns to our investors.”

Declaration of Quarterly Dividend

The Company also announced today the Board of Directors has declared a first quarter dividend of $0.05 per share to stockholders of record as of March 15, 2016. The dividend is payable on April 5, 2016. The declaration and payment of any future dividend will be subject to the discretion of the Board of Directors and will depend on a variety of factors including the Company’s financial condition and results of operations.

Results of Operations

The following table summarizes our results of operations for the three months and years ended December 31, 2015 and 2014, respectively (in thousands, except percentages and per share amounts):

Quarterly Financial Results

Net income for the quarter ended December 31, 2015 was $20.2 million compared to $19.7 million for the quarter ended December 31, 2014.

Gross premiums written were $167.5 million for the fourth quarter of 2015 compared to $181.5 million for the fourth quarter of 2014. The decrease in gross premiums written is a result of a decrease in the amount of business taken from Citizens during the fourth quarter of 2015 compared to the fourth quarter of 2014, as assumed premiums written were $32.1 million in the fourth quarter of 2015 compared to $102.8 million in the fourth quarter of 2014. We book the unearned premium that is transferred to us from Citizens at the time of the assumption as assumed written premium. The assumed premiums written of $32.1 million in the fourth quarter of 2015 represented approximately $50 million of annualized premium, as compared to approximately $169 million of annualized premium from the $102.8 million of assumed premium written during the fourth quarter of 2014. Partially offsetting the reduction in assumed premiums written was an increase in direct premiums written, which were $135.4 million in the fourth quarter of 2015 compared to $78.7 million in the fourth quarter of 2014, a year over year improvement of 72%

In the fourth quarter of 2015, commerical residential annualized premium from Citizens assumptions was $7.5 million versus approximately $85 million in the fourth quarter of 2014. This decrease was consistent with our previous expectations that there would not be a significant number of commercial residential policies left in Citizens that would be attractive to us after our large assumption during the fourth quarter of 2014. Regarding personal residential, for the full year 2015, we assumed approximately 68,200 policies from Citizens representing $139 million of annualized premium from 10 assumption transactions throughout the year. In 2014, we assumed approximately 57,600 policies representing $120 million of annualized premium from 7 assumption transactions throughout the year. However, in 2014, approximately 71% of the policies were assumed in the fourth quarter, while the assumption transactions were spread out more evenly throughout 2015, with only 32% assumed during the fourth quarter.

Gross premiums earned were $143.4 million for the fourth quarter of 2015 compared to $106.7 million for the fourth quarter of 2014. Total in force premiums at December 31, 2015 were $591.5 million compared to $494.6 million at December 31, 2014. Personal lines policy count at December 31, 2015 was approximately 253,700 policies, representing $478.0 million of in force premiums. The policy count for commercial residential was approximately 3,400 policies, representing $113.5 million of in force premiums.

Ceded premiums as a percentage of gross premiums earned were 32.0% for the fourth quarter of 2015 compared to 23.5% for the fourth quarter of 2014. This increase is primarily due to the inclusion of commercial residential in our 2015 reinsurance program which has a higher reinsurance cost associated with it than personal residential, and the growth in gross premiums earned in the fourth quarter of 2014 from the large fourth quarter Citizens assumptions discussed above for which there was no corresponding increase in ceded premiums. An increase in ceded premiums did not occur until June 1, 2015, when our reinsurance contracts renewed. Because our Citizens assumptions in 2015 were more evenly spread throughout the year, we did not achieve the same significant reduction in the ceded premium ratio in the fourth quarter of 2015 compared to the fourth quarter of 2014.

The loss ratio on a gross basis increased to 27.2% in the fourth quarter of 2015 from 25.7% in the fourth quarter of 2014, primarily as a result of increased frequency of personal residential claims. The reported loss ratio, which excludes the impact of changes in IBNR, was 22.8% for the fourth quarter of 2015 compared to 19.8% for the fourth quarter of 2014.

The Company’s expense ratio on a gross basis was 20.3% for the fourth quarter of 2015 compared to 25.1% for the fourth quarter of 2014. Stock-based compensation accounted for 0.5 points of the expense ratio in the fourth quarter of 2015 compared to 3.0 points in the fourth quarter of 2014. In addition, the amortization of the Sunshine State Insurance Company policy acquisition cost increased the gross expense ratio by approximately 2.8 points during the fourth quarter of 2014, while having no impact in the

fourth quarter of 2015.

Overall, Heritage’s combined ratio on a gross basis was 79.5% for the fourth quarter of 2015 compared to 74.3% for the fourth quarter of 2014.

Full Year Financial Results

Net income for the year ended December 31, 2015 was $92.5 million compared to $47.1 million for the prior year, a 96.4% increase. Gross premiums written were $586.1 million in 2015 compared to $436.4 million in 2014, a 34.3% increase. Gross premiums earned were $524.7 million in 2015 compared to $311.5 million in 2014, a 68.4% increase. The combined ratio on a gross basis was 74.9% compared to 81.5% for the prior year, primarily as a result of improved ceded premium and expense ratios.

Book Value Analysis

Book value per share increased 36.8% to $11.71 at December 31, 2015 compared to the prior year. In May 2014, the Company completed its initial public offering, a concurrent private placement and the issuance of common stock associated with the exercise of warrants. The net proceeds from these activities totaled approximately $101.1 million in exchange for 13,431,610 shares of common stock issued.

Conference Call Details:

Webcast:

To listen to the live webcast, please go to the investor section of the company’s website. This webcast will be archived and available for replay.

HERITAGE INSURANCE HOLDINGS, INC.

CONSOLIDATED BALANCE SHEETS

(In thousands, except share data and per share)

HERITAGE INSURANCE HOLDINGS, INC.

CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME

(In thousands, except share data and per share)

About Heritage

Heritage Insurance Holdings, Inc. (NYSE: HRTG) is a property and casualty insurance holding company headquartered in Clearwater, Florida. Its subsidiary, Heritage Property & Casualty Insurance Company, writes over $590 million of personal and commercial residential premium through a large network of experienced agents. Heritage is led by a seasoned senior management team with an average of 31 years of insurance industry experience.

Forward-Looking Statements

Statements in this press release that are not historical facts are forward-looking statements that are subject to certain risks and uncertainties that could cause actual events and results to differ materially from those discussed herein. Without limiting the generality of the foregoing, words such as “may,” “will,” “expect,” “believe,” “anticipate,” “intend,” “could,” “would,” “estimate,” “or “continue” or the other negative variations thereof or comparable terminology are intended to identify forward-looking statements. The risks and uncertainties that could cause our actual results to differ from those expressed or implied herein include, without limitation: the success of the Company’s marketing initiatives, inflation and other changes in economic conditions (including changes in interest rates and financial markets); the impact of new federal and state regulations that affect the property and casualty insurance market; the costs of reinsurance and the collectability of reinsurance; assessments charged by various governmental agencies; pricing competition and other initiatives by competitors; our ability to obtain regulatory approval for

requested rate changes, and the timing thereof; legislative and regulatory developments; the outcome of litigation pending against us, including the terms of any settlements; risks related to the nature of our business; dependence on investment income and the composition of our investment portfolio; the adequacy of our liability for losses and loss adjustment expense; insurance agents; claims experience; ratings by industry services; catastrophe losses; reliance on key personnel; weather conditions (including the severity and frequency of storms, hurricanes, tornadoes and hail); changes in loss trends; acts of war and terrorist activities; court decisions and trends in litigation; and other matters described from time to time by us in our filings with the Securities and Exchange Commission, including, but not limited to, the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 and the Annual Report on Form 10-K for the year ended December 31, 2015 which we expect to be filed with the Securities and Exchange Commission on March 8, 2016. In addition, investors should be aware that generally accepted accounting principles prescribe when a company may reserve for particular risks, including litigation exposures. Accordingly, results for a given reporting period could be significantly affected if and when a reserve is established for a major contingency. Reported results may therefore appear to be volatile in certain accounting periods. The Company undertakes no obligations to update, change or revise any forward-looking statement, whether as a result of new information, additional or subsequent developments or otherwise.

Heritage Insurance Holdings, Inc.

Investor Contact:

Stephen Rohde, CFO

727-362-7204

srohde@heritagepci.com

or

Melanie Skijus, Investor Relations Director

727-362-7262

mskijus@heritagepci.com