EXHIBIT 99.1 FOR IMMEDIATE RELEASE: CONTACT: Robert K. Chapman February 23, 2007 United Bancorp, Inc. 734-214-3801 UNITED BANCORP, INC. ANNOUNCES REVISION OF FOURTH QUARTER AND FULL YEAR 2006 EARNINGS TECUMSEH, MI -- United Bancorp, Inc. (OTCBB: UBMI) today issued an adjustment to its fourth quarter and full year 2006 earnings release dated January 16, 2007. The adjustment relates to the Company's recognition of the potential impairment of a large loan and the Company's corresponding increase in the amount of its Allowance for Loan Losses (ALL) at December 31, 2006 to take into account the potential impairment of the loan. During the ongoing finalization of its financial statements and preparation of its 10-K for the year ended December 31, 2006 and subsequent to the January 16, 2007 press release, the Company determined that the level of impairment of loans to one commercial loan customer was understated in its analysis at the end of the calendar year. As a consequence, Management determined that an additional provision of $450,000 to the Company's ALL in the fourth quarter of 2006 was warranted. This change affects the Company's unaudited financial statements for the three month and one year periods ended December 31, 2006. Net income for the fourth quarter and year ended December 31, 2006 was reduced by $268,124, or a $.10 decrease to the previously-reported basic and diluted earnings per share. As a result of this adjustment, the Company's revised net income was $2,197,106 for the fourth quarter of 2006 and $8,971,526 for the year ended December 31, 2006. For the fourth quarter 2006, basic and diluted earnings per share were $.83, while for the full year 2006, basic and diluted earnings per share were $3.38. These changes will be reflected in United Bancorp, Inc.'s 10-K for the year ended December 31, 2006, which will be filed on or before March 16, 2007. We have set forth below the Company's consolidated financial highlights - unaudited, consolidated balance sheets (unaudited), and consolidated statements of income (unaudited) for the fourth quarter and full year 2006. This data replaces the consolidated financial highlights - unaudited, consolidated balance sheets, and consolidated statements of income (unaudited), contained in United Bancorp, Inc.'s previous earnings release of January 16, 2007. About United Bancorp, Inc. United Bancorp, Inc. is an independent financial holding company that is the parent company for United Bank & Trust and United Bank & Trust -- Washtenaw. The subsidiary banks operate seventeen banking offices in Lenawee, Washtenaw and Monroe counties, and United Bank & Trust maintains an active wealth management group that serves the Company's market area. For more information, visit the company's website at www.ubat.com. UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS FOLLOW. Safe Harbor Statement This news release may contain certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21 B of the Securities Act of 1934, as amended, which are intended to be safe harbors created thereby. Those statements are based on management's beliefs, assumptions, current expectations, estimates and projections about the financial services industry, the economy, and about the Company itself. Words such as "anticipate," "believe," "determine," "estimate," "expect," "forecast," "intend," "is likely," "plan," "project," "opinion," variations of such terms, and similar expressions are intended to identify such forward-looking statements. The presentations and discussions of the provision and allowance for loan losses presented in this report are inherently forward-looking statements in that they involve judgments and statements of belief as to the outcome of future events. These statements are not guarantees of future performance and involve certain risks, uncertainties, and assumptions that are difficult to predict with regard to timing, extent, likelihood, and degree of occurrence. These risks, uncertainties and assumptions are included in the Company's filings with the SEC, including Item 1A of its Form 10K. Actual results and outcomes may materially differ from what may be expressed or forecasted in such forward-looking statements. Internal and external factors that may cause such a difference include changes in economic conditions in the market area the Company conducts business which could materially impact credit quality trends, interest rates and interest rate relationships; demand for products and services; the degree of competition by traditional and non-traditional competitors; changes in banking laws and regulations; changes in tax laws; changes in prices, levies, and assessments; the impact of technological advances; governmental and regulatory policy changes; the outcomes of pending and future litigation and contingencies; trends in customer behavior and customer ability to repay loans; software failure, errors or miscalculations; and the vicissitudes of the national economy. The Company wishes to caution readers not to place undue reliance on any such forward-looking statements, which speak only as of the date made. The Company undertakes no obligation to update, amend or clarify forward-looking statements, whether as a result of new information, future events, or otherwise. ### UNITED BANCORP, INC. AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS (UNAUDITED) in thousands of dollars except per share data <Table> <Caption> December 31, December 31, 2006 2005 ------------ ------------ ASSETS Cash and demand balances in other banks ....................... $ 17,606 $ 20,416 Federal funds sold ............................................ 3,770 -- --------- --------- Total cash and cash equivalents ............................... 21,376 20,416 Securities available for sale ................................. 95,811 103,432 Loans held for sale ........................................... 5,772 1,060 Portfolio loans ............................................... 595,991 557,052 --------- --------- Total loans ................................................... 601,763 558,112 Less allowance for loan losses ............................ 7,849 6,361 --------- --------- Net loans ..................................................... 593,914 551,751 Premises and equipment, net ................................... 13,215 12,998 Goodwill ...................................................... 3,469 3,469 Bank owned life insurance ..................................... 11,499 11,091 Accrued interest receivable and other assets .................. 11,705 10,621 --------- --------- TOTAL ASSETS .................................................. $ 750,989 $ 713,779 ========= ========= LIABILITIES Total deposits ................................................ 628,002 590,652 Short term borrowings ......................................... 77 6,376 FHLB Advances outstanding ..................................... 40,945 42,228 Accrued interest payable and other liabilities ................ 7,429 6,901 --------- --------- TOTAL LIABILITIES ............................................. 676,453 646,157 --------- --------- SHAREHOLDERS' EQUITY Common stock and paid in capital, no par value; 5,000,000 shares authorized; 2,623,716 and 2,493,238 shares issued and outstanding, respectively ................... 71,075 63,186 Retained earnings ............................................. 3,393 4,705 Accumulated other comprehensive income (loss), net of tax ..... 68 (269) --------- --------- TOTAL SHAREHOLDERS' EQUITY .................................... 74,536 67,622 --------- --------- TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY .................... $ 750,989 $ 713,779 ========= ========= Book value per share of common stock .......................... $ 28.41 $ 25.83 (Per share values restated to reflect 2006 stock dividend) </Table> UNITED BANCORP, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) DECEMBER 31, 2006 <Table> <Caption> Quarter to Date Year to Date ------------------------------ ------------------------------ December 31, December 31, December 31, December 31, INTEREST INCOME 2006 2005 2006 2005 ------------ ------------ ------------ ------------ Interest and fees on loans Taxable $ 11,248,028 $ 9,588,571 $ 42,771,348 $ 35,085,253 Tax exempt 31,084 34,802 129,101 139,634 Interest on securities Taxable 646,062 507,959 2,392,039 2,032,414 Tax exempt 380,434 358,759 1,404,596 1,198,681 Interest on federal funds sold 67,903 77,102 358,649 193,025 ------------ ------------ ------------ ------------ Total interest income 12,373,511 10,567,193 47,055,733 38,649,007 INTEREST EXPENSE Interest on certificates of deposit of $100,000 or more 1,208,060 631,657 4,186,583 2,029,600 Interest on other deposits 3,248,254 2,446,063 11,703,706 8,255,076 Interest on short term borrowings 14,130 15,087 61,570 73,912 Interest on other borrowings 479,634 490,496 1,850,288 1,927,351 ------------ ------------ ------------ ------------ Total interest expense 4,950,078 3,583,303 17,802,147 12,285,939 ------------ ------------ ------------ ------------ NET INTEREST INCOME 7,423,433 6,983,890 29,253,586 26,363,068 Provision for loan losses 921,327 377,700 2,122,999 1,331,594 ------------ ------------ ------------ ------------ NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES 6,502,106 6,606,190 27,130,587 25,031,474 ------------ ------------ ------------ ------------ NONINTEREST INCOME Service charges on deposit accounts 881,704 807,158 3,364,364 3,017,445 Trust & Investment fee income 947,790 945,754 3,769,233 3,873,625 Gains (losses) on securities transactions 13,807 -- 12,073 (443) Loan sales and servicing 276,484 309,732 905,716 1,214,859 ATM, debit and credit card fee income 495,956 435,011 1,905,160 1,676,563 Sales of nondeposit investment products 206,303 180,743 992,702 797,503 Income from bank-owned life insurance 105,595 100,695 407,692 397,600 Other income 182,843 181,602 817,931 691,282 ------------ ------------ ------------ ------------ Total noninterest income 3,110,482 2,960,695 12,174,871 11,668,434 NONINTEREST EXPENSE Salaries and employee benefits 3,540,571 3,570,172 15,037,698 14,662,572 Occupancy and equipment expense 1,064,327 930,993 4,344,320 4,073,641 External data processing 475,556 359,469 1,536,559 1,283,314 Advertising and marketing 243,313 302,586 1,062,663 1,105,953 Other expense 1,274,132 1,196,699 4,932,764 4,070,039 ------------ ------------ ------------ ------------ Total noninterest expense 6,597,899 6,359,919 26,914,004 25,195,519 ------------ ------------ ------------ ------------ INCOME BEFORE FEDERAL INCOME TAX 3,014,689 3,206,966 12,391,454 11,504,389 Federal income tax 817,583 888,316 3,419,928 3,180,653 ------------ ------------ ------------ ------------ NET INCOME $ 2,197,106 $ 2,318,650 $ 8,971,526 $ 8,323,736 ============ ============ ============ ============ Basic earnings per share $ 0.83 $ 0.88 $ 3.38 $ 3.15 Diluted earnings per share $ 0.83 $ 0.88 $ 3.38 $ 3.13 (Earnings per share restated to reflect 2006 stock dividend) Return on average assets (annualized) 1.18% 1.30% 1.23% 1.21% Return on average equity (annualized) 11.85% 13.77% 12.62% 12.75% </Table>