1st Quarter 2018 Investor Presentation Exhibit 99.1

Forward Looking Statements This presentation contains “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. In general, forward-looking statements usually use words such as “may,” “believe,” “expect,” “anticipate,” “intend,” “will,” “should,” “plan,” “estimate,” “predict,” “continue” and “potential” or the negative of these terms or other comparable terminology, including statements related to the expected timing of the closing of the Merger, the expected returns and other benefits of the Merger to shareholders, expected improvement in operating efficiency resulting from the Merger, estimated expense reductions resulting from the transactions and the timing of achievement of such reductions, the impact on and timing of the recovery of the impact on tangible book value, and the effect of the Merger on CenterState’s capital ratios. Forward-looking statements represent management’s beliefs, based upon information available at the time the statements are made, with regard to the matters addressed; they are not guarantees of future performance. Forward-looking statements are subject to numerous assumptions, risks and uncertainties that change over time and could cause actual results or financial condition to differ materially from those expressed in or implied by such statements. Factors that could cause or contribute to such differences include, but are not limited to (1) the risk that the cost savings and any revenue synergies from the Merger may not be realized or take longer than anticipated to be realized, (2) disruption from the Merger with customer, supplier, employee or other business partner relationships, (3) the occurrence of any event, change or other circumstances that could give rise to the termination of the Merger Agreement, (4) the risk of successful integration of Charter’s businesses into CenterState, (5) the failure to obtain the necessary approvals by the stockholders of Charter, with respect to the Merger, (6) the amount of the costs, fees, expenses and charges related to the Merger, (7) the ability by CenterState to obtain required governmental approvals of the Merger, (8) reputational risk and the reaction of each of the companies’ customers, suppliers, employees or other business partners to the Merger, (9) the failure of the closing conditions in the Merger Agreement to be satisfied, or any unexpected delay in closing the Merger, (10) the risk that the integration of Charter’s operations into the operations of CenterState will be materially delayed or will be more costly or difficult than expected, (11) the possibility that the Merger may be more expensive to complete than anticipated, including as a result of unexpected factors or events, (12) the dilution caused by CenterState’s issuance of additional shares of its common stock in the Merger, and (13) general competitive, economic, political and market conditions. Additional factors which could affect the forward looking statements can be found in the cautionary language included under the headings “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Risk Factors” in CenterState’s Annual Report on Form 10-K for the year ended December 31, 2017, Charter’s Annual Report on Form 10-K for the year ended September 30, 2017, and other documents subsequently filed by CenterState and Charter with the SEC. Consequently, no forward-looking statement can be guaranteed. CenterState and Charter do not undertake any obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. For any forward-looking statements made in this presentation, the exhibits hereto or any related documents, CenterState and Charter claim protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995.

Established in 2000 Ticker Symbol: CSFL (NASDAQ) Headquartered in Winter Haven, FL on the I-4 Corridor $10.3B in assets $6.9B in loans $8.1B in deposits 128 branches (1) Tampa Jacksonville Winter Haven Miami Ocala Gainesville Sarasota Daytona Beach St. Augustine Vero Beach Boca Raton Orlando Overview of Franchise Financial data as of March 31, 2018. (1)Branches as of 4/23/18.

Stock Price Performance Over 1, 3 & 5 Year Periods Source: S&P Market Intelligence 1 Year: 4/1/17 – 3/31/18 3 Year: 4/1/15 – 3/31/18 5 Year: 4/1/13– 3/31/18

Banking the Sunshine State Image Credit: ESA/NASA

Florida ranks as the #1 state in the nation for net domestic migration (2). Florida’s ~$926B economy is 70% larger than any other state in the southeastern United States and maintains an attractive tax policy (3). If the Sunshine State was a country, Florida’s economy would be the 18th largest in the world – larger than Saudi Arabia, Poland and Argentina (4). Why Invest in Florida? Sources:(1) The Wall Street Journal and IRS; adjusted gross income as reported on individual income tax returns. (2)US Census Bureau (3)Bureau of Economic Analysis (4)International Monetary Fun, World Economic Outlook Population Growth (2) Adjusted Gross Income Migration ($bn) New Jersey Connecticut Illinois Florida 2012 ($1.7) ($1.8) ($3.3) $9.0 2013 (1.7) (1.8) (3.9) 8.7 2014 (2.5) (1.3) (3.0) 10.1 2015 (2.6) (1.3) (3.4) 11.5 Total ($8.5) ($6.2) ($13.6) $39.3 State Taxpayer Flight (1)

AVERAGE 1980 - 2000: .00734 Single Family Housing is a Tailwind Undersupply of housing starts since the crisis exceeds the over supply prior to the crisis. Source: Florida Office of Economic and Demographic Research Oversupply Undersupply

Source: SNL Financial and Bureau of Economic Analysis Superior Markets of Operation 2018 Population by State (mm) GDP ($bn) - Southeast States ’18 – ’23 Proj. HHI Growth – Southeast States ’18 – ’23 Proj. Population Growth – CSFL MSAs

Strong Presence in the largest MSAs in the Southeast Source: S&P Market intelligence Population data as of June 30, 2017 Jacksonville Orlando Miami Pensacola Atlanta LaGrange Auburn Tampa High Growth Markets West Point Macon Birmingham

Capital Management

Assets: ~ $12.0 billion Deposits: ~ $9.5 billion Loans: ~ $8.0 billion Market Cap: ~ $2.5 billion Acquisition of Charter Financial Corporation Source: S&P Market Intelligence Financial data as of March 31, 2018; Pricing data as of April 24, 2018 Excludes purchase accounting adjustments Pro Forma Highlights(1) CSFL (128) CHFN (22) CSFL Non-Depository Offices (4) Entry into the attractive Atlanta MSA with a quality franchise Core funded bank with deep roots (and #1 deposit market share) in its home markets of LaGrange / West Point Gainesville Tallahassee Sarasota LaGrange Montgomery Mobile Jacksonville St. Augustine Daytona Beach Pensacola Tampa Miami Winter Haven Boca Raton Vero Beach Savannah Birmingham Huntsville Auburn Macon Atlanta

Summary of Transaction Terms Acquiror: CenterState Bank Corporation (Nasdaq: CSFL) Target: Charter Financial Corporation (Nasdaq: CHFN) Consideration Mix: 90% Stock / 10% Cash Per Share Stock Consideration: 0.738 shares of CSFL stock Per Share Cash Consideration: $2.30 Indicative Price Per Share:(1) $22.76 Option Treatment: Cashed out at $23.00 Transaction Value:(1) $360.1 million Valuation Multiples:(1) Price / Tangible Book Value per Share: 1.92x Price / 2019 Consensus EPS Estimate: 14.4x(2) Price / 2019 EPS Adjusted for Cost Saves: 9.8x Required Approvals: Customary regulatory approval and approval of Charter shareholders Expected Closing: Q4 2018 Based on CSFL’s closing price of $27.72 as of April 24, 2018, 15,137,631 CHFN shares outstanding and 1,536,522 options with weighted-average strike price of $10.13 Based on consensus EPS estimate of $1.58 adjusted for calendar year end, assuming $0.40 Q4 CY2019 EPS

Financial Impact Assumptions Neutral to tangible book value per share Mid-single digit EPS accretion, once cost savings are fully realized Pro forma C&D and CRE concentrations remain within regulatory guidelines Attractive Returns TCE / TA: 9.0% Leverage Ratio: 9.6% CET1 Capital Ratio: 11.2% Tier 1 Capital Ratio: 11.6% Total Capital Ratio: 12.0% Pro Forma Capital Cost Savings: 30% cost savings (85% in 2019, 100% thereafter) Balance Sheet Restructuring: Redeployment of $150 million of excess cash into securities (1.5% pretax pick up) Merger Related Expenses: $18.9 million after-tax (35% at CSFL, 65% at CHFN) Purchase Accounting Marks: Credit mark to loans: ($18.2) million (1.5% of loans) Reversal of existing ALLL: $11.1 million Reversal of remaining loan discount: $2.9 million Gross mark to OREO: ($0.1) million DTA for taxable goodwill:(1) $6.1 million Mark to fixed assets: $3.0 million Core Deposit Intangible: 2.0% of non-time deposits, amortized over 10 years Estimated Closing: Q4 2018 Deferred tax related to CHFN’s previous taxable transaction with CBS.

Pro Forma Consolidation Opportunities 178% growth in deposits per branch 37 188 99 126 2009 …..………………...…………………….……… 3/31/18 Pro forma branches include Charter branches and scheduled branch consolidations pursuant to the Harbor acquisition. 37 Branches Average Size $27M 181 Branches Acquired Plus 7 De-novo Branches 99 Branches Consolidated or Sold 126 Branches Average Size $75M

Operating Performance

TBVPS and Adjusted EPS: Historical and Consensus Forecast *Adjusted Diluted EPS is a Non-GAAP financial measure that excludes gain on extinguishment of debt, gain on sale of AFS securities, gain on sale of trust department, loss on termination of FDIC loss share agreements, deferred tax asset write down and merger-related expenses, net of tax. See reconciliation of GAAP to Non-GAAP measures on slide 27. † Source: SNL Financial and/or analyst reports; reflects consensus estimate TBVPS plus Dividends EPS 2014 – 2017 CAGR: 10.8% $8.89 $9.16 $10.82 Consensus $12.06 $7.95 2014 – 2017 CAGR: 45.3% Consensus $13.74

Efficiency Ratio2 Performance Metrics Adjusted ROAA and ROATCE are Non-GAAP financial measures that exclude gain on sale of AFS securities, gain on sale of trust department, deferred tax write down and merger-related expenses, net of tax. ROATCE ratios also exclude amortization of intangible assets, net of tax. Efficiency Ratio and Adjusted Efficiency Ratio are Non-GAAP financial measures. Efficiency Ratio is defined as follows: [non-interest expense – nonrecurring expense] / [net interest income (fully tax equivalent) + non-interest income – nonrecurring income]. Adjusted Efficiency Ratio also excludes merger-related expenses and amortization of intangibles. See reconciliation of GAAP to Non-GAAP measures on slide 27. Return on Average Tangible Common Equity1 Return on Average Assets1

Number of Deposit Accounts (000’s) Premium Core Deposit Franchise Cost of Deposits 2013 – 2017 CAGR: 10.2% Deposit Mix vs. Peers † Core deposits defined as non-time deposits. * Source: SNL Financial; as of MRQ available. Peers include the following: ABCB, CBF, CHCO, CTBI, FBNC, FCB, HOMB, LION, PSTB, RBCAA, RNST, SBCF, SFBS, SFNC, SSB, STBZ, TOWN, UBSH, UCBI and XBKS.

Deposits Loans / Deposits at 12/31/17 Cost of Total Deposits (bps) Peer Average CenterState 47bps 26 bps 3Q15 – 1Q18 CenterState deposit beta equal to 6% compared to the Peer average of 11% CenterState Peer Average Source: SNL Financial; as of MRQ available. Peers include the following: ABCB, CBF, CHCO, CTBI, FBNC, FCB, HOMB, LION, PSTB, RBCAA, RNST, SBCF, SFBS, SFNC, SSB, STBZ, TOWN, UBSH, UCBI and XBKS.

EPS includes corporate overhead allocations. †Annualized Correspondent Banking Income Analysis ($MM) Client Banks Correspondent Banking office Correspondent Earnings Measure(1)   2015 2016 2017 QTD 3/31/18†   EPS $0.14 $0.19 $0.15 $0.12

Investment Thesis CenterState is among the largest banking companies headquartered in Florida by assets, market capitalization, deposit market share and branch footprint(1). CenterState’s markets are some of the strongest markets in the Southeastern U.S. with new entry into Atlanta, the largest GDP MSA in Southeastern U.S. Premium core deposit franchise with strong checking account base should outperform peers in a rising rate environment. Continued compounded growth in Tangible Book Value per share and Earnings per share creates shareholder value. Source: SNL Financial (1)Data as of MRQ; deposit market share data as of 6/30/17. Note: Community bank defined as institutions with total assets less than $20.0 billion

Supplemental

                  Loan Type No. of Loans Balance Avg Loan Balance     Residential Real Estate 15,734 $ 1,529 MM $97,200   CRE Owner Occupied 3,697 $ 1,879 MM $508,200 CRE Non-Owner Occupied 2,869 $ 1,817 MM $633,300   Construction, A&D, & Land 2,093 $ 416 MM $198,800   Commercial & Industrial 7,316 $ 910 MM $124,400   Consumer & All Other 14,147 $ 133 MM $9,400   Total   45,856   $6,684 MM   $145,800 Total Loan Portfolio as of March 31, 2018 Total Loans by Type 1 Total Loans Detail 1 1. Excluding purchased credit-impaired and held for sale loans Loan Relationships n Top 10 represent ~5% of total loans n Top 20 represent ~7% of total loans Consolidated Loan Concentrations C&D loan concentration of 49% CRE loan concentration of 292%

Loans Yields (TEY) (Non-GAAP)1 Average Balances ($ in billions) Excluding PCI loans Source: SNL Financial, MRQ presented if current quarter not yet available Nonperforming assets include loans 90 days or more past due, nonaccrual loans, and OREO/ORA; and exclude FDIC covered assets Southeastern peers include ABCB, CBF, CHCO, CTBI, FBNC, FCB, HOMB, LION, PSTB, RBCAA, RNST, SBCF, SFBS, SFNC, SSB, STBZ, TOWN, UBSH, UCBI, XBKS. Florida peers include all banks headquartered in Florida with total assets between $1 billion and $10 billion. 1. TEY yield on Non-PCI loans is a Non-GAAP financial measure. See reconciliation of GAAP to Non-GAAP measures on slide 27. NPAs / Loans & OREO (%) Net Charge-offs (Recoveries) / Average Non PCI loans (%) Update Excel SNL * Annualized

Deposit Relationships n Top 10 represent ~4% of total deposits n Top 20 represent ~5% of total deposits Total Deposits by Type Total Deposits Detail 23 Total Deposit Portfolio as of March 31, 2018                   Deposit Type No. of Deposits Balance Avg Deposit Balance     Demand Deposits 141,052 $ 2,970 MM $21,100   Now Accounts 54,881 $ 1,382 MM $25,200   Savings Deposits 42,657 $ 731 MM $17,100   Money Market 13,283 $ 1,730 MM $130,300 Certificates of Deposits 23,054 $ 1,299 MM $56,300         Total   274,927   $ 8,112 MM   $29,500 Checking Accounts (DDA & NOW) No. of Accounts $ Balance Retail 73% 29% Commercial 27% 71%

Analyst Coverage Source: SNL Financial and/or most recent analyst reports. Firm Analyst Report Date Rating Price Target 2018 Operating EPS Estimate 2019 Operating EPS Estimate Sandler O’Neill Stephen Scouten, CFA May 2, 2018 Buy $33.00 $2.10 $2.30 + Partners 404-442-2882 Keefe, Bruyette & Brady Gailey, CFA May 2, 2018 Outperform $34.00 $2.09 $2.35 Woods Inc. 404-231-6546 Stephens, Inc. Tyler Stafford, CFA Apr. 26, 2018 Overweight $33.00 $2.04 $2.25 501-377-8362 Raymond James Michael Rose Apr. 25, 2018 Outperform 2 $32.00 $2.00 $2.25 Financial Inc. 312-655-2940 SunTrust Robinson Michael Young Apr. 26, 2018 Buy $32.00 $1.97 $2.27 Humphrey 404-926-5148 Hovde Group LLC Joseph Fenech May 1, 2018 Outperform $33.00 $1.95 $2.25 312-386-5909 Brean Capital, LLC Blair Brantley, CFA Apr. 25, 2018 Buy $32.00 $1.91 $2.24 804-234-1299 Fig Partners LLC John Rodis Apr. 27, 2018 Market Perform $31.00 $1.86 2.21 314-570-2671 Average Consensus $1.99 $2.27

Reconciliation of GAAP to Non-GAAP Measures   Year Ended       2014   2015   2016   2017     Adjusted net income per share - Diluted                   Earnings per share - Diluted (GAAP) $0.31   $0.85   $0.88   $0.95     Effect to adjust for gain on sale of trust department, net of tax             (0.01)     Effect to adjust for loss on termination of FDIC loss share agreements, net of tax —   —   0.24   —     Effect to adjust for merger-related expenses, net of tax 0.18   0.02   0.15   0.15     Effect to adjust for deferred tax asset write down —   —   —   0.32     Adjusted net income per share - Diluted (Non-GAAP) $0.49   $0.87   $1.27   $1.41                                           Three months   Year Ended   Ended   2014   2015   2016   2017   Mar. 31, 2018 Adjusted return on average assets (Non-GAAP)                   Return on average assets (GAAP) 0.38%   1.00%   0.87%   0.88%   1.41% Effect to adjust for gain on sale of trust department, net of tax —   —   —   (0.01%)   — Effect to adjust for merger-related expenses, net of tax 0.22%   0.01%   0.14%   0.14%   0.27% Effect to adjust for termination of FDIC loss share agreements, net of tax —   —   0.24%   —   — Effect to adjust for deferred tax asset write down —   —   —   0.29%   — Adjusted return on average assets (Non-GAAP) 0.60%   1.01%   1.25%   1.30%   1.68%                     Adjusted return on average tangible equity (Non-GAAP)                   Return on average tangible equity (Non-GAAP) 4.8%   10.8%   10.7%   10.1%   18.0% Effect to adjust for gain on early extinguishment of debt, net of tax —   —   (0.1%)   —   — Effect to adjust for gain on sale of trust department, net of tax —   —   —   (0.1%)   — Effect to adjust for merger-related expenses, net of tax 2.5%   0.1%   1.8%   1.5%   3.2% Effect to adjust for termination of FDIC loss share agreements, net of tax —   —   2.8%   —   — Effect to adjust for deferred tax asset write down —   —   —   3.2%   — Adjusted return on average tangible equity (Non-GAAP) 7.2%   10.9%   15.2%   14.6%   21.2%                     Efficiency ratio (tax equivalent) (Non-GAAP)                   Efficiency ratio (tax equivalent) (Non-GAAP) 85.9%   64.8%   70.6%   60.9%   64.0% Effect to adjust for amortization of intangibles (1.4%)   (1.3%)   (1.2%)   (1.2%)   (2.0%) Effect to adjust for merger-related expenses (7.3%)   (0.4%)   (4.6%)   (4.2%)   (7.3%) Effect to adjust for termination of FDIC loss share agreements, net of tax —   —   (7.1%)   —   — Adjusted efficiency ratio (Non-GAAP) 77.2%   63.1%   57.7%   55.5%   54.7%                       Three months ended   Mar. 31, 2017   Jun. 30, 2017   Sept. 30, 2017   Dec. 31, 2017   Mar. 31, 2018 Tax equivalent yields on Non-PCI loans (Non-GAAP)                   Yield on Non-PCI loans 4.39%   4.55%   4.54%   4.55%   5.02% Effect from tax equivalent adjustment 0.09%   0.08%   0.07%   0.08%   0.02% Yield on Non-PCI loans - tax equivalent (Non-GAAP) 4.48%   4.63%   4.61%   4.63%   5.04%

Investor Contacts Ernie Pinner John Corbett Executive Chairman President & Chief Executive Officer epinner@centerstatebank.com jcorbett@centerstatebank.com Steve Young Jennifer Idell Chief Operating Officer Chief Financial Officer syoung@centerstatebank.com jidell@centerstatebank.com

Additional Information CenterState intends to file a registration statement on Form S-4 with the Securities and Exchange Commission to register the shares of CenterState's common stock that will be issued to Charter's shareholders in connection with the transaction. The registration statement will include a proxy statement/prospectus and other relevant materials in connection with the proposed merger transaction involving CenterState and Charter. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT, PROXY/PROSPECTUS WHEN IT BECOMES AVAILABLE (AND ANY OTHER DOCUMENTS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IN CONNECTION WITH THE TRANSACTION OR INCORPORATED BY REFERENCE INTO THE PROXY/PROSPECTUS) BECAUSE SUCH DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION REGARDING THE PROPOSED MERGER TRANSACTION. Investors and security holders may obtain free copies of these documents and other documents filed with the Securities and Exchange Commission on its website at www.sec.gov. Investors and security holders may also obtain free copies of the documents filed with the Securities and Exchange Commission by CenterState on its website at www.centerstatebanks.com and by Charter on its website at www.charterbk.com. CenterState, Charter and certain of their directors and executive officers may be deemed participants in the solicitation of proxies from Charter stockholders in connection with the Merger. Information regarding the directors and executive officers of CenterState and Charter and other persons who may be deemed participants in the solicitation of the stockholders of Charter in connection with the Merger will be included in the proxy statement/prospectus for Charter’s special meeting of stockholders, which will be filed by CenterState with the SEC. Information about the directors and officers of CenterState and their ownership of CenterState common stock can also be found in CenterState’s definitive proxy statement in connection with its 2018 annual meeting of shareholders, as filed with the SEC on March 12, 2018, and other documents subsequently filed by CenterState with the SEC. Information about the directors and officers of Charter and their ownership of Charter common stock can also be found in Charter’s definitive proxy statement in connection with its 2018 annual meeting of shareholders, as filed with the SEC on January 5, 2018, and other documents subsequently filed by Charter with the SEC. Additional information regarding the interests of such participants will be included in the proxy statement/prospectus and other relevant documents regarding the Merger filed with the SEC when they become available.