Exhibit 99.1

NEWS RELEASE

CARDINAL ANNOUNCES THIRD QUARTER 2015 EARNINGS

Cardinal Financial Corporation (NASDAQ: CFNL) (the “Company”) today reported that third quarter of 2015 earnings increased 19% from a year ago, to $11.2 million, or $0.34 per diluted share, compared to $9.4 million, or $0.29 per diluted share, for the quarterly period ended September 30, 2014.  For the nine month year to date period, earnings increased 73% to $38.3 million, or $1.15 per diluted share, compared to $22.2 million, or $0.68 per diluted share, for the nine month year to date period of 2014.

Certain non-operating items impacted the financial results for the year to date periods reported above. In the second quarter of 2015, Cardinal recorded one-time non interest income of approximately $2.95 million related to litigation and approximately $500,000 of related expenses.  Year to date results for 2014 included expenses related to the Company’s January 2014 acquisition of United Financial Banking Companies, Inc. (UFBC).  Excluding the impact associated with the litigation and the acquisition expenses related to UFBC (see Table 4), the current year to date adjusted net income was $37.0 million, a 42% increase over $26.0 million for the same period a year ago.

Selected Highlights

·                  Loans held for investment grew $122 million during the quarter, or 17% annualized.   Asset quality remains excellent.  At September 30, 2015, nonperforming assets decreased to $721,000, or 0.02% of total assets. The Company had $0 past due loans 90 days or more, and $0 real estate owned.  Year to date, the Company had net recoveries of 0.12% of average loans outstanding.

·                  Operating net income increased 11% to $13.0 million, or $0.39 per share, for the current quarter versus $11.7 million, or $0.35 per share, for the year ago quarter.  For

the year to date period ended September 30, 2015, operating net income increased 46% to $33.9 million, or $1.03 per share, versus $23.2 million, or $0.71 per share, for the same period a year ago.  Operating net income is a non-GAAP measure which excludes the impact of Staff Accounting Bulletin (“SAB”) 109 that creates earnings volatility, and management believes operating net income more accurately reflects the performance of the Company.  See Table 4 for a comparison of operating versus GAAP net income.

·                  Net income for the commercial banking segment was $29.6 million for the current year to date period, versus $23.5 million for the same period a year ago.  Before merger and acquisition (M&A) expenses, net income for these same respective periods was $29.9 million versus $27.0 million, an increase of 11%.

·                  The Company’s mortgage banking subsidiary, George Mason Mortgage, continued its solid performance.  For the current quarter, it reported net income of $631,000 and delivered operating net income of $2.4 million.

·                  All capital ratios exceed the requirements of banking regulators to be considered well-capitalized.  Tangible common equity capital (TCE) as a percentage of total assets was 9.36% at September 30, 2015.

Review of Balance Sheet

At September 30, 2015, total assets of the Company were $3.88 billion, an increase of 17% from total assets of $3.31 billion at September 30, 2014. Loans held for investment grew to $2.92 billion versus $2.49 billion a year ago, a 17% increase.   Loans held for sale increased to $378 million at September 30, 2015 compared to $313 million at September 30, 2014, and the Company’s investment portfolio increased to $430 million from $341 million for these same respective periods.

Over the past year, deposit balances increased $514 million to $2.94 billion from $2.42 billion, an increase of 21%.   Non-interest bearing demand deposit accounts, which represented 21% of total deposits, increased $67 million to $621 million. Customer deposits and customer repurchase accounts were $2.65 billion, an increase of 18% since September 30, 2014.

Net Interest Income

The Company’s net interest income increased 6%, to $29.6 million from $27.9 million, for the three month periods ended September 30, 2015 and 2014, respectively.  Average interest earning assets increased to $3.58 billion from $3.09 billion a year ago, and average interest bearing liabilities increased to $2.65 billion from $2.27 billion.  The Company’s tax equivalent net interest margin was 3.37% for the current quarter and 3.66% for the same quarter of last year.  The yield on interest earning assets declined from 4.35% for the year ago quarter to 4.06% for the current quarter as new loan originations and security purchases are being recorded at lower rates than maturing assets, a result of competition and the historically low rate environment that has existed for the past several years. For these same respective periods, the cost of interest bearing liabilities has remained at 0.93%. The Company initiated several customer driven deposit

strategies to attract new banking relationships and new money during the first nine months of the year.

Commercial Banking Review

For the current quarter ended September 30, 2015, net income for the commercial banking segment was $11.0 million, an increase of 6% from $10.4 million for the year ago quarter. For the current year to date period, net income was $29.6 million, versus $23.5 million a year ago.  Before M&A expenses, net income for these same respective periods was $29.9 million versus $27.0 million, an increase of 11% (see Table 6).

The recovery from loan losses was $547,000 for the current quarter versus $0 for the year ago quarter. The allowance for loan losses was 1.08% of loans outstanding at September 30, 2015 versus 1.19% at September 30, 2014.  This ratio decrease from a year ago is primarily the result of improving credit quality.  The Company’s nonperforming assets were 0.02% of total assets at September 30, 2015 compared to 0.19% a year ago.  For the year to date period, there were recoveries from previously charged off loans in excess of current charge offs of 0.12% of average loans outstanding.

Non-interest income was $1.7 million for the current quarter compared to $1.6 million for the year ago quarter.  Deposit and loan fees were $584,000 and $344,000, respectively for the current quarter versus $571,000 and $340,000 for the same period of 2014.  Securities gains in the commercial banking segment totaled $769,000 for the current quarter versus $665,000 for the same year ago period.

Non-interest expense was $15.3 million for the current quarter versus $13.4 million for the prior year quarter.  The increase in non-interest expense from a year ago is largely a result of the Company electing to change its parent company expense allocation associated with managing the bank, which resulted in a bank expense increase of over $670,000.  Additionally, variable compensation expenses related to incentives for performance increased $800,000 compared to the year ago quarter.  The commercial bank’s efficiency ratio for the current quarter was 49.7%.

Mortgage Banking Review

For the current quarter ended September 30, 2015, the mortgage banking segment reported a net profit of $631,000, and it delivered operating net income of $2.4 million.  Operating net income (a non-GAAP measure) excludes the impact of the Staff Accounting Bulletin (“SAB”) 109 accounting requirement to record unrealized gains on forward commitments to sell its locked mortgage loan pipeline.  Comparable quarterly results are shown below.

The accompanying Table 7 provides additional recent quarterly information regarding the impact of SAB 109.

During the third quarter of 2015, closed loans were $885 million and loans sold to investors totaled $983 million, versus $827 million and $890 million, respectively, for the same quarter of 2014.  Net realized gain on sales and other fees, before the impact of SAB 109, were $10.8 million for the current quarter versus $9.9 million for the same period a year ago.  The improvement is the result of the higher production levels and a gain on sale margin increase to 2.61% from 2.52% a year ago.  As previously announced, in late June, George Mason began a program to sell approximately 25% of its loan originations on a pooled mandatory delivery basis in order to increase profitability.  Traditionally, all loans have been sold individually on a best efforts basis. The increase in the gain on sale margin is reflective of the success of this program during the third quarter as the mandatory loan sale program performed as expected.

Loan applications totaled $1.1 billion during the third quarter of 2015, down from $1.4 billion for quarter ended June 30, 2015.  Purchase money applications were $850 million, which represented 74% of total application volume in the current quarter versus 77% in the previous quarter.  The second quarter of each year is typically the most active for home buyers in George Mason’s markets, and purchase money activity usually slows from these levels during the third and fourth quarters.

Operating expenses increased $391,000 in the current quarter when compared to the year ago quarter.   The change was due to expenses related to the higher levels of production.

Capital Ratios

The Company remains in excess of all regulatory standards to be considered a well capitalized bank.

MANAGEMENT COMMENTS

Bernard H. Clineburg, Chairman and Chief Executive Officer of the Company, said:

“I am again pleased with how our Company performed during the third quarter of 2015. On an operating basis, our commercial banking segment’s year to date net income improved 11%.  Our business development efforts and commitment to the local markets continued to drive new relationships. Loan growth of $122 million continues to illustrate the quality of our commercial team and their persistence in achieving goals. Credit metrics remained pristine, and our banking offices successfully executed upon our deposit campaigns to increase our core customer balances by almost 18%.

“The mortgage banking division also had another strong quarter with operating earnings of $2.4 million. Approximately 75% of volume continues to be purchase money mortgages, providing stability in diverse economic conditions. Costs increased slightly due to production levels; however, we remained focused on increasing operating efficiencies.

“Looking forward, we will continue to concentrate on gaining profitable market share, either through de novo expansion or acquisition, which will increase our franchise value.  We remain committed to maintaining and growing a strong financial services company for our employees, clients, the communities we serve, and especially our shareholders.”

CAUTION ABOUT FORWARD-LOOKING STATEMENTS

This press release contains “forward-looking statements” within the meaning of the federal securities laws. These forward-looking statements contain information related to matters such as the Company’s intent, belief or expectation with regard to such matters as financial and operational performance, credit quality and branch expansion. Such statements are necessarily based on management’s assumptions and estimates and are inherently subject to a variety of risks and uncertainties concerning the Company’s operations and business environment, which are difficult to predict and beyond the control of the Company. Such risks and uncertainties could cause actual results of the Company to differ materially from those matters expressed or implied in such forward-looking statements. For an explanation of some of the risks and uncertainties associated with forward-looking statements, please refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 and other reports filed with and furnished to the Securities and Exchange Commission.  The Company has no obligation and does not undertake to update, revise or correct any of the forward-looking statements after the date of this press release, or after the respective dates on which such statements otherwise are made.

About Cardinal Financial Corporation: Cardinal Financial Corporation, a financial holding company headquartered in Tysons Corner, Virginia with assets of $3.88 billion at September 30, 2015, serves the Washington Metropolitan region through its wholly-owned subsidiary, Cardinal Bank. Cardinal also operates several other subsidiaries: George Mason Mortgage, LLC, a residential mortgage lending company based in Fairfax, Virginia and Cardinal Wealth Services, Inc., a wealth management services company. The Company’s stock is traded on NASDAQ (CFNL). For additional information please visit our Web site at www.cardinalbank.com or call (703) 584-3400.

Table 1.

Cardinal Financial Corporation and Subsidiaries

Summary Statements of Condition

(Dollars in thousands)

(Unaudited)

Table 2.

Cardinal Financial Corporation and Subsidiaries

Summary Income Statements

(Dollars in thousands, except share and per share data)

(Unaudited)

Table 3.

Cardinal Financial Corporation and Subsidiaries

Selected Financial Information

(Dollars in thousands, except per share data and ratios)

(Unaudited)

(1) The average yields for loans receivable and investment securities available-for-sale are reported on a fully taxable-equivalent basis at a rate of 33% for 2015 and 2014.

(2) Efficiency ratio is calculated as total non-interest expense divided by the total of net interest income and non-interest income.

(3) Realized gains are those gains recognized on the date the loan is sold and do not include the unrealized gains recognized at the loan commitment date.

(4) Net realized gains are gains net of loan origination expense recognized on the date the loan is sold and do not include the unrealized gains recognized at the loan commitment date.

(5) Tangible book value is calculated as total shareholders’ equity less goodwill and other intangible assets, divided by common shares outstanding.

Table 4.

Cardinal Financial Corporation and Subsidiaries

(Dollars in thousands, except share and per share data)

(Unaudited)

Mortgage Revenue Recognition Impact of SAB 109 (Written Loan Commitments Recorded at Fair Value Through Earnings)

Net Income Reconciliation for the Impact of Merger and Acquisition Expenses and SAB 109