Exhibit 99.1

Heritage Insurance Holdings, Inc. Reports Financial Results for Third Quarter of 2017

Clearwater, Fla., November 1, 2017- Heritage Insurance Holdings, Inc. (NYSE:HRTG) (“Heritage” or the “Company”), a property and casualty insurance holding company, today reported its financial results for the fiscal quarter ended September 30, 2017.

Third Quarter Highlights

Bruce Lucas, the Company’s Chairman and CEO, said, “First, on behalf of the entire Heritage family we wish a swift and complete recovery to all of those impacted by the 2017 hurricanes. I am extremely happy to report positive operating income for the quarter. Our results are exceptional considering the magnitude of industry losses amongst our peer group. We have a unique approach to the market that combines our claims department with our wholly-owned Contractors Alliance Network. This network responded to over 7,000 Irma claims and is a great example of how to better service our customers while reducing losses. We also made a tactical decision to reduce our catastrophe retention to $20 million on a pre-tax basis, which was a key driver of our strong performance in the quarter. During the quarter, we acquired approximately $30 million of premium from Sawgrass Mutual Insurance Company, at no cost to the Company, which we believe will be accretive to our operating income and reinsurance portfolio. Finally, we repurchased over 4.6 million shares of common stock during the quarter at an average price of $11.38. We believe this large repurchase below book value will help to drive enhanced shareholder returns for the foreseeable future.”

Mr. Lucas continued, “Beyond the quarter, we believe our future prospects are encouraging. Heritage announced that we entered into a definitive agreement relating to the acquisition of NBIC, which is currently pending regulatory approval and is expected to close in the fourth quarter. Once the acquisition closes, we expect our consolidated gross premiums written will be rapidly approaching $1 billion by the end of 2018. Not only do we expect the acquisition to significantly increase operating income, it will give Heritage better geographic diversification compared to our Florida peers. Finally, we had the foresight to buy approximately $700 million of three-year catastrophe bonds with fixed pricing.    If reinsurance prices increase in 2018, Heritage will be less impacted than our peer companies that buy traditional single-year reinsurance programs. We believe that potentially lower reinsurance costs will create a competitive advantage for the Company.”

Results of Operations

The following table summarizes our results of operations for the three and nine months ended September 30, 2017 and 2016 (in thousands, except percentages and per share amounts):

Quarterly Financial Results

Operating income was $1.4 million for the third quarter of 2017 compared to $18.6 million for the third quarter of 2016. The decrease is primarily a result of losses due to Hurricane Irma, for which the Company’s pre-tax retention was $20 million.

The Company recorded a net loss of $8.7 million for the third quarter of 2017, compared to net income of $10.9 million for the same period in 2016. The variance relates to retained losses from Hurricane Irma and non-operating items totaling $10.6 million, gross of tax. Non-operating items include a $6.9 million non-cash charge for the change in valuation of the convertible option feature related to our recent issuance of $136.8 million of convertible senior notes, which is not tax deductible, and interest expense of $3.1 million. The conversion of all of our outstanding convertible senior notes into common stock would result in the issuance of more than 20% of the Company’s voting power and shares of common stock outstanding prior to such issuance, which requires stockholder approval under the rules of the New York Stock Exchange. Therefore, the convertible senior notes are convertible only into cash until stockholder approval is obtained. The inability to settle the convertible senior notes in common stock at this time results in the conversion option that is part of the convertible senior notes being recorded at fair value as a derivative liability at issuance and at the end of the quarter. Once stockholder approval is obtained, Heritage will reclassify the value of the conversion option liability as a component of equity, thereby limiting the volatility of an adverse impact to earnings. A Special Meeting of Stockholders as been scheduled for December 1, 2017, at which stockholders will be asked to approve the issuance of common stock upon the conversion of the convertible senior notes.

Gross premiums earned were $153.1 million for the third quarter of 2017 compared to $164.7 million for the third quarter of 2016. This decrease was driven by selective underwriting and exposure management aimed at improving underwriting results. For example, the Company has not participated in the assumption of Citizens policies since the second quarter of 2016 and has discontinued writing new personal lines business in the Tri-County area. Additionally, because the Sawgrass transaction occurred on September 1, only $2.6 million of the associated premiums were earned in the third quarter.

Ceded premiums as a percentage of gross premiums earned were 37.8% for the third quarter of 2017 compared to 38.4% for the third quarter of 2016. A decrease in ceded premium as a percentage of gross written premium was realized despite reducing the Company’s retention from $40 million to $20 million at our June 1, 2017 reinsurance renewal.

The loss ratio as measured against gross premiums earned was 41.8% and 32.7% for the third quarters of 2017 and 2016, respectively. The increase in the loss ratio was primarily due to retained losses associated with Hurricane Irma.

The Company’s operating expense ratio on a gross basis was 23.8% for the third quarter of 2017 compared to 22.3% for the third quarter of 2016. The increase was due to $1.1 million of transaction costs associated with Heritage’s pending acquisition of NBIC.

Heritage’s combined ratio on a gross basis was 103.4% for the third quarter of 2017 compared to 93.4% for the third quarter of 2016. The combined ratio increased primarily due to the retained losses from Hurricane Irma.

Book Value Analysis

The Company’s stockholders’ equity decreased from $358.0 million at December 31, 2016 to $301.7 million at September 30, 2017. The table below highlights the primary reasons for the changes in the fourth quarter of 2016 and the nine months ended September 30, 2017.

Over the twelve month period ended September 30, 2017, the Company repurchased $66.6 million of common stock and paid out $8.6 million of dividends.

The fair value of the conversion option liability will be added back to stockholders’ equity if stockholder approval is received at the special meeting scheduled for December 1, 2017, as discussed above. At September 30, 2017, the value of the conversion option liability was $23.7 million.

$8.5 million of interest expense and amortization of debt issuance costs were incurred in the twelve months ended September 30, 2017 as the Company raised capital in the form of $79.6 million of senior notes and $136.8 million of convertible notes to finance the acquisition of NBIC, which is expected to close in the fourth quarter of 2017.

Operating income, offset by the provision for income taxes, increased stockholders’ equity by $16.5 million over the twelve month period ended September 30, 2017. Operating income, before taxes, was adversely impacted by approximately $25 million from Hurricane Matthew, which occurred in the fourth quarter of 2016 and the $20 million retention from Hurricane Irma in 2017.

The stockholders’ equity roll forward for the three months ended December 31, 2016 and the nine months ended September 30, 2017 is as follows:

Book value per share increased by 3.5% from $12.41 at December 31, 2016 to $12.84 at September 30, 2017. The increase in the Company’s book value reflects the repurchase of 5,340,267 shares of common stock for $61.6 million in the first nine months of 2017.

Conference Call Details:

Thursday, November 2, 2017 – 8:30 a.m. EDT

Participant Dial-in Numbers Toll Free: 1-888-346-3095

Participant International Dial In: 1-412-902-4258

Canada Toll Free: 1-855-669-9657

Webcast:

To listen to the live webcast, please go to http://investors.heritagepci.com/. This webcast will be archived and accessible on the Company’s website.

Consolidated Statements of Income and Other Comprehensive Income

(In thousands, except share and per share amounts)

(unaudited)

Consolidated Balance Sheets

(In thousands, except share and per share amounts)

(unaudited)

About Heritage

Heritage Insurance Holdings, Inc. is a property and casualty insurance holding company headquartered in Clearwater, Florida. Its subsidiaries, Heritage Property & Casualty Insurance Company and Zephyr Insurance Company, write personal and commercial residential premium through a large network of experienced agents in Florida, Hawaii, North Carolina, South Carolina, Georgia and Alabama. Heritage Insurance Holdings, Inc. is led by a seasoned senior management team with an average of 30 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. Forward-looking statements, including, without limitation, statements about the proposed NBIC acquisition by Heritage and the receipt of stockholder approval relating to the issuance of common stock upon conversion of our convertible senior notes, relate to Heritage’s current expectations, beliefs, projections and similar expressions concerning matters that are not historical facts and are not guarantees of future performance. 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; our ability to build and maintain relationships with 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, 2016 filed with the Securities and Exchange Commission on March 15, 2017. 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:

Joseph Peiso, Investor Relations Director

727-362-7261

jpeiso@heritagepci.com