Nature of Banking Activities and Subsidiaries: Nicolet Bankshares, Inc. (the “Company” or “Nicolet”) was incorporated on April 5, 2000. Effective June 6, 2002, Nicolet Bankshares, Inc. received approval to become a one-bank holding company owning 100% of the common stock of Nicolet National Bank (the “Bank”). The Bank opened for business on November 1, 2000.

During 2004, the Company entered into a joint venture, Nicolet Joint Ventures, LLC (the “JV”), with a real estate development and investment firm (the “Firm”) in connection with the selection and development of a site for a new headquarters facility. The Firm is considered a related party, as one of its principals is a Board member and shareholder of the Company. The JV involves a 50% ownership by the Company. See Note 17 for additional disclosures.

During 2008, the Company purchased 100% of Brookfield Investment Partners, LLC (“Brookfield Investments”), an investment advisory firm that provides investment strategy and transactional services to financial institutions. Goodwill of $0.8 million was recorded in conjunction with this purchase.

 In 2013, the Company consummated its acquisition of Mid-Wisconsin Financial Services, Inc. (“Mid-Wisconsin”), whereby Mid-Wisconsin was merged with and into the Company, and Mid-Wisconsin Bank, Mid-Wisconsin’s wholly owned commercial bank subsidiary serving central Wisconsin, was merged with and into the Bank.

In 2013, the Company acquired selected assets and assumed selected liabilities of Bank of Wausau through a Federal Deposit Insurance Corporation (“FDIC”) assisted transaction. There was no loss sharing agreement as part of this acquisition. Collectively, the Mid-Wisconsin and Bank of Wausau transactions are referred to as “the 2013 acquisitions.”

During late 2016, the Company capitalized Nicolet Advisory Services, LLC (“Nicolet Advisory”), a wholly owned registered investment advisor subsidiary to provide brokerage and investment advisory services to customers.

In 2016, the Company consummated its acquisition of Baylake Corp. (“Baylake”), whereby Baylake was merged with and into the Company, and Baylake Bank, Baylake’s wholly owned commercial bank subsidiary serving northeast Wisconsin, was merged with and into the Bank. Goodwill of $65.5 million was recorded in conjunction with this purchase.

In 2016, the Company in a private transaction hired a select group of financial advisors and purchased their respective books of business and their operating platform. Goodwill of $0.4 million was recorded in conjunction with this purchase. Collectively, the Baylake and financial advisory transactions are referred to as “the 2016 acquisitions.” See Note 2 for additional disclosures.

Through its acquisition of Baylake, the Bank owns a 49.8% indirect interest in United Financial Services, LLC (“UFS, LLC”), a data processing service and e-banking entity, through its 99.2% ownership of United Financial Services, Inc. (“UFS, Inc.”). Collectively, UFS, Inc. and UFS, LLC are referred to as “UFS”. The investment in UFS is carried in other assets under the equity method of accounting, and the Bank’s pro rata share of UFS income is included in noninterest income. Income in equity of UFS recognized by the Bank was $1.0 million for the year ended December 31, 2016. Amounts paid to UFS for data processing services by the Bank were $1.6 million and $0.9 million in 2016 and 2015, respectively. Loans to UFS were $0.2 million at December 31, 2016 compared to none at the end of 2015. The carrying value of the Bank’s investment in UFS was $8.3million at December 31, 2016.

Operating Segment: The consolidated income of the Company is derived principally from the Bank, which conducts lending (primarily commercial-based loans, as well as residential and consumer loans) and deposit gathering (including other banking- and deposit-related products and services, such as ATMs, safe deposit boxes, check-cashing, wires, and debit cards) to businesses, consumers and governmental units principally in its trade area of northeastern and central Wisconsin, and Menominee, Michigan, trust services, brokerage services (delivered through the Bank and Nicolet Advisory), and the support to deliver, fund and manage all such banking and wealth management services to its customer base. The contribution of the JV, Brookfield Investments and Nicolet Advisory were not significant to the consolidated balance sheet or net income for 2016. While the chief decision makers monitor the revenue streams of the various products and services, and evaluate costs, balance sheet positions and quality, all such products, services and activities are directly or indirectly related to the business of community banking, with no regular, formal or material segment delineations. Operations are managed and financial performance is evaluated on a company-wide basis, and accordingly, all the financial service operations are considered by management to be aggregated in one reportable operating segment.

Use of Estimates: Preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying disclosures. These estimates are based on management’s best knowledge of current events and actions the Company may undertake in the future. Estimates are used in accounting for, among other items, determination of the allowance for loan losses, valuation of loans in acquisition transactions, useful lives for depreciation and amortization, fair value of financial instruments, other-than-temporary impairment of investments, valuation of deferred tax assets, uncertain income tax positions and contingencies. Estimates that are particularly susceptible to significant change for the Company include the determination of the allowance for loan losses, determination and assessment of deferred tax assets and liabilities, and the valuation of loans acquired in the 2013 and 2016 acquisitions; therefore, these are critical accounting policies. Management does not anticipate any material changes to estimates in the near term. Factors that may cause sensitivity to the aforementioned estimates include but are not limited to: external market factors such as market interest rates and employment rates, changes to operating policies and procedures, and changes in applicable banking or tax regulations.

Actual results may ultimately differ from estimates, although management does not generally believe such differences would materially affect the consolidated financial statements in any individual reporting period presented.

Business Combinations: The Company accounts for business combinations under the acquisition method of accounting in accordance with Accounting Standards Codification (“ASC”) 805, Business Combinations (“ASC 805”). The Company recognizes the full fair value of the assets acquired and liabilities assumed and immediately expenses transaction costs. There is no separate recognition of the acquired allowance for loan losses on the acquirer’s balance sheet as credit related factors are incorporated directly into the fair value of the net tangible and intangible assets acquired. If the amount of consideration exceeds the fair value of assets purchased less the fair value of liabilities assumed, goodwill is recorded. Alternatively, if the amount by which the fair value of assets purchased exceeds the fair value of liabilities assumed and consideration paid, a gain (“bargain purchase gain”) is recorded. Fair values are subject to refinement for up to one year after the closing date of an acquisition as information relative to closing date fair values becomes available. Results of operations of the acquired business are included in the statement of income from the effective date of the acquisition. Additional information regarding acquisitions is provided in Note 2.

Cash and Cash Equivalents: For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash and due from banks, federal funds sold, and interest-earning deposits in other banks with original maturities of less than 90 days, if any. The Bank maintains amounts in due from banks which, at times, may exceed federally insured limits. Management monitors these correspondent relationships. The Bank has not experienced any losses in such accounts. The Bank may have restrictions on cash and due from banks as it is required to maintain certain vault cash and reserve balances with the Federal Reserve Bank to meet specific reserve requirements. There was no reserve balance required with the Federal Reserve Bank at December 31, 2016 or 2015.

Realized gains or losses on securities sales (using the specific identification method) and declines in value judged to be other-than-temporary are included in the consolidated statements of income under gain on sale and write-down of assets, net. Premiums and discounts are amortized or accreted into interest income over the life of the related securities using the effective interest method.

Management evaluates investment securities for other-than-temporary impairment on at least an annual basis. A decline in the market value of any investment below amortized cost that is deemed other-than-temporary is charged to earnings for the decline in value deemed to be credit related and a new cost basis in the security is established. The decline in value attributed to non-credit related factors considered temporary in nature is recognized in other comprehensive income. In evaluating other-than-temporary impairment, management considers the length of time and extent to which the fair value has been less than cost, and the financial condition and near-term prospects of the issuer for a period sufficient to allow for any anticipated recovery in fair value in the near term.

Other Investments: As a member of the Federal Reserve Bank System, Federal Agricultural Mortgage Corporation, and the FHLB System, the Bank is required to maintain an investment in the capital stock of these entities. These equity securities are “restricted” in that they can only be sold back to the respective institutions or another member institution at par. Therefore, they are less liquid than other tradable AFS securities. As no ready market exists for these stocks, and they have no quoted market value, these investments are carried at cost. Also included are Company investments in other private companies that do not have quoted market prices, carried at cost less other-than-temporary impairment charges, if any. Management’s evaluation of these other investments for impairment includes consideration of the financial condition and other available relevant information of the issuer.

Loans Held for Sale: Loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value as determined on an aggregate basis and generally consist of current production of certain fixed-rate residential first mortgages. The amount by which cost exceeds market value is recorded as a valuation allowance and charged to earnings. Changes, if any, in the valuation allowance are also included in earnings in the period in which the change occurs. As of December 31, 2016 and 2015, no valuation allowance was necessary. Loans held for sale may be sold servicing retained or servicing released, and are generally sold without recourse. The carrying value of mortgage loans sold with servicing retained is reduced by the amount allocated to the servicing right at the time of sale. Gains and losses on sales of mortgage loans held for sale are included in earnings in mortgage income, net.

Loans and Allowance for Loan Losses (“ALLL”) – Originated Loans: Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are carried at their principal amount outstanding, net of deferred loan fees and costs. Interest income is accrued on the unpaid principal balance using the simple interest method. The accrual of interest income on loans is discontinued when, in the opinion of management, there is reasonable doubt as to the borrower’s ability to meet payment of interest or principal when due. Loans are generally placed on nonaccrual status when contractually past due 90 days or more as to interest or principal, though may be placed in such status earlier based on the circumstances. Loans past due 90 days or more may continue on accrual only when they are well secured and/or in process of collection or renewal. When interest accrual is discontinued, all previously accrued but uncollected interest is reversed against current period interest income. Except in very limited circumstances, cash collections on nonaccrual loans are credited to the loan receivable balance and no interest income is recognized on those loans until the principal balance is paid in full. Accrual of interest may be resumed when the customer is current on all principal and interest payments and has been paying on a timely basis for a period of time.

Management considers a loan to be impaired when it is probable the Company will be unable to collect all contractual principal and interest payments due in accordance with the terms of the loan agreement. For determining the adequacy of the ALLL, all material loans in nonaccrual status are evaluated for impairment, together with additional loans having impairment risk characteristics. For this purpose, management has defined “material” to be a credit relationship of more than $250,000. At the time an individual loan goes into nonaccrual status however, management evaluates the loan for impairment and possible charge-off regardless of loan size. Typically, impairment amounts for loans under the scope criteria are charged off when the impairment amount is determined.

The ALLL is a reserve for estimated credit losses on individually evaluated loans determined to be impaired as well as estimated credit losses inherent in the loan portfolio. Actual credit losses, net of recoveries, are deducted from the ALLL. Loans are charged off when management believes that the collectability of the principal is unlikely. Subsequent recoveries, if any, are credited to the ALLL. A provision for loan losses, which is a charge against earnings, is recorded to bring the ALLL to a level that, in management’s judgment, is adequate to absorb probable losses in the loan portfolio.

The allocation methodology applied by the Company is designed to assess the appropriateness of the ALLL and includes allocations for specifically identified impaired loans and loss factor allocations for all remaining loans, with a component primarily based on historical loss rates and a component primarily based on other qualitative factors. Impaired loans are individually assessed and are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate or, as a practical expedient, at the loan’s observable market price or the fair value of the collateral if the loan is collateral dependent.

Loans that are determined not to be impaired are collectively evaluated for impairment, stratified by type and allocated loss ranges based on the Company’s actual historical loss ratios for each strata, and adjustments are also provided for certain current environmental and qualitative factors. An internal loan review function rates loans using a grading system based on nine different categories. Loans with grades of seven or higher (“classified loans”) represent loans with a greater risk of loss and may be assigned allocations for loss based on specific review of the weaknesses observed in the individual credits if classified as impaired. Classified loans are constantly monitored by the loan review function to ensure early identification of any deterioration.

The total allowance is available to absorb losses from any segment of the loan portfolio. Management believes the ALLL is appropriate at December 31, 2016. The allowance analysis is reviewed by the Board on a quarterly basis in compliance with regulatory requirements.

Loans and ALLL – Acquired Loans: The loans purchased in the 2013 and 2016 acquisitions were acquired loans. Acquired loans are recorded at their estimated fair value at the acquisition date, and are initially classified as either purchase credit impaired (“PCI”) loans (i.e. loans that reflect credit deterioration since origination and it is probable at acquisition that the Company will be unable to collect all contractually required payments) or purchased non-impaired loans (i.e. “performing acquired loans”).

PCI loans are accounted for under the accounting guidance for loans and debt securities acquired with deteriorated credit quality, found in FASB ASC Topic 310-30, Receivables—Loans and Debt Securities Acquired with Deteriorated Credit Quality. The Company estimates the amount and timing of expected principal, interest and other cash flows for each loan or pool of loans meeting the criteria above, and determines the excess of the loan’s scheduled contractual principal and contractual interest payments over all cash flows expected to be collected at acquisition as an amount that should not be accreted. These credit discounts (“nonaccretable marks”) are included in the determination of the initial fair value for acquired loans; therefore, an allowance for loan losses is not recorded at the acquisition date. Differences between the estimated fair values and expected cash flows of acquired loans at the acquisition date that are not credit-based (“accretable marks”) are subsequently accreted to interest income over the estimated life of the loans using a method that approximates a level yield method if the timing and amount of the future cash flows is reasonably estimable. Subsequent to the acquisition date for PCI loans, increases in cash flows over those expected at the acquisition date result in a move of the discount from nonaccretable to accretable. Decreases in expected cash flows after the acquisition date are recognized through the provision for loan losses. All fair value discounts initially recorded in 2013 and 2016 on PCI loans were deemed to be credit related.

Performing acquired loans are accounted for under FASB ASC Topic 310-20, Receivables—Nonrefundable Fees and Other Costs. Performance of certain loans may be monitored and based on management’s assessment of the cash flows and other facts available, portions of the accretable difference may be delayed or suspended if management deems appropriate. The Company’s policy for determining when to discontinue accruing interest on performing acquired loans and the subsequent accounting for such loans is essentially the same as the policy for originated loans described above.

An ALLL is calculated using a methodology similar to that described for originated loans. Performing acquired loans are subsequently evaluated for any required allowance at each reporting date. Such required allowance for each loan pool is compared to the remaining fair value discount for that pool. If greater, the excess is recognized as an addition to the allowance through a provision for loan losses. If less than the discount, no additional allowance is recorded. Charge-offs and losses first reduce any remaining fair value discount for the loan pool and once the discount is depleted, losses are applied against the allowance established for that pool.

For PCI loans after acquisition, cash flows expected to be collected are recast for each loan periodically as determined appropriate by management. If the present value of expected cash flows for a loan is less than its carrying value, impairment is reflected by an increase in the ALLL and a charge to the provision for loan losses. If the present value of the expected cash flows for a loan is greater than its carrying value, any previously established ALLL is reversed and any remaining difference increases the accretable yield which will be taken into income over the remaining life of the loan. Loans which were considered troubled debt restructurings by Mid-Wisconsin and Baylake prior to the acquisitions are not required to be classified as troubled debt restructurings in the Company’s consolidated financial statements unless or until such loans would subsequently meet criteria to be classified as such, since acquired loans were recorded at their estimated fair values at the time of the acquisition.

Credit-Related Financial Instruments: In the ordinary course of business the Company has entered into financial instruments consisting of commitments to extend credit, financial letters of credit, and standby letters of credit. Financial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party, while standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party. Such financial instruments are recorded in the consolidated financial statements when they are funded.

Transfers of Financial Assets: Transfers of financial assets, primarily in loan participation activities, are accounted for as sales only when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of the right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return assets.

Premises and Equipment: Premises and equipment are stated at cost less accumulated depreciation and amortization. Premises and equipment acquired in the 2013 and 2016 acquisitions were recorded at estimated fair value on the respective dates of acquisition. Depreciation is computed on straight-line and accelerated methods over the estimated useful lives of the related assets. Leasehold improvements are amortized on the straight-line method over the shorter of the estimated useful lives of the improvements or the terms of the related leases. Maintenance and repairs are expensed as incurred.

Estimated useful lives of new premises and equipment generally range as follows:

Other Real Estate Owned (“OREO”): OREO acquired through partial or total satisfaction of loans or bank facilities no longer in use are carried at fair value less estimated costs to sell. Any write-down in the carrying value of loans or vacated bank premises at the time of transfer to OREO is charged to the ALLL or to write-down of assets, respectively. OREO properties acquired in conjunction with the 2013 and 2016 acquisitions were recorded at fair value on the date of acquisition. Any subsequent write-downs to reflect current fair market value, as well as gains or losses on disposition and revenues and expenses incurred to hold and maintain such properties, are treated as period costs.

Goodwill and Other Intangibles: Goodwill represents the excess of the purchase price over the fair value of the net identifiable assets acquired. Goodwill is not amortized but is subject to impairment tests on at least an annual basis. Other intangibles include core deposit intangibles and customer list intangibles. Core deposit base premiums represent the value of acquired customer core deposit bases. The core deposit intangibles have an estimated finite life, are amortized on an accelerated basis over a 10-year period, and are subject to periodic impairment evaluation. Customer relationships were acquired in the financial advisor business acquisition in 2016. The customer list intangibles have finite lives and are amortized on a straight-line basis to expense over their initial weighted average life of approximately 12 years as of acquisition.

Management periodically reviews the carrying value of its long-lived and intangible assets to determine if any impairment has occurred or whether changes in circumstances have occurred that would require a revision to the remaining useful life, in which case an impairment charge would be recorded as an expense in the period of impairment. In making such determination, management evaluates whether there are any adverse qualitative factors indicating that an impairment may exist, as well as the performance, on an undiscounted basis, of the underlying operations or assets which give rise to the intangible. The Company’s annual assessments indicated no impairment charge on goodwill or other intangibles was required for 2016 or 2015.

Bank-owned Life Insurance (“BOLI”): The Company owns BOLI on certain executives and employees. BOLI balances are recorded at their cash surrender values. Changes in the cash surrender values are included in noninterest income.

Stock-based Compensation Plans: Share-based payments to employees, including grants of restricted stock or stock options, are valued at fair value of the award on the date of grant and expensed on a straight-line basis as compensation expense over the applicable vesting period. A Black-Scholes model is utilized to estimate the fair value of stock options and the market price of the Company’s stock at the date of grant is used to estimate the value of restricted stock awards. The weighted average assumptions used in the model for valuing option grants in 2016 and 2015 were as follows:

Income Taxes: The Company files a consolidated federal income tax return and a combined state income tax return (both of which include the Company and its wholly owned subsidiaries). Accordingly, amounts equal to tax benefits of those companies having taxable federal losses or credits are reimbursed by the companies that incur federal tax liabilities.

Amounts provided for income tax expense are based on income reported for financial statement purposes and do not necessarily represent amounts currently payable under tax laws. Deferred income tax assets and liabilities are computed annually for differences between the financial statement and tax bases of assets and liabilities that will result in taxable or deductible amounts in the future based on enacted tax rates applicable to the periods in which the differences are expected to affect taxable income. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. Valuation allowances are established when it is more likely than not that a portion of the full amount of the deferred tax asset will not be realized. In assessing the ability to realize deferred tax assets, management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies.

At acquisition, deferred taxes were evaluated in respect to the acquired assets and assumed liabilities (including the acquired net operating losses), and a net deferred tax asset was recorded. Certain limitations within the provisions of the tax code are placed on the amount of net operating losses which can be utilized as part of acquisition accounting rules and were incorporated into the calculation of the deferred tax asset. In addition, a portion of the fair market value discounts on PCI loans which resolved in the first twelve months after the acquisition were disallowed under provisions of the tax code.

Earnings per Common Share: Basic earnings per common share are calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings per common share are calculated by dividing net income available to common shareholders by the weighted average number of common shares adjusted for the dilutive effect of outstanding common stock awards, if any.

Earnings per common share and related information are summarized as follows:

There were no options to purchase shares that were excluded from the calculation of diluted earnings per share at December 31, 2016. Options to purchase approximately 0.2 million shares were outstanding at the year ending December 31, 2015 but are excluded from the calculation of diluted earnings per common share as the effect would have been anti-dilutive.

Treasury Stock: Treasury stock is accounted for at cost on a first-in-first-out basis. It is the Company’s general practice to cancel treasury stock shares in the same year as purchased, and thus, not carry a treasury stock balance.

Comprehensive Income: Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Certain changes in assets and liabilities, such as unrealized gains and losses on AFS securities, bypass the statement of income and instead are reported in accumulated other comprehensive income, as a separate component of the equity section of the balance sheet. Realized gains or losses are reclassified to current period income. Changes in these items, along with net income, are components of comprehensive income. The Company presents comprehensive income in a separate consolidated statement of comprehensive income.

Reclassifications: Certain amounts in the 2015 and 2014 consolidated financial statements have been reclassified to conform to the 2016 presentation.