EXHIBIT 99.4

Date

Dear Member:

We are pleased to announce that OmniAmerican Bank is converting from the mutual to stock form of ownership, subject to approval by the members of OmniAmerican Bank at a Special Meeting of Members. OmniAmerican Bank will be the wholly-owned subsidiary of a newly formed stock holding company named OmniAmerican Bancorp, Inc. In connection with the conversion, OmniAmerican Bancorp, Inc. is offering shares of its common stock in a subscription and community offering pursuant to the Plan of Conversion.

To accomplish the conversion we need your participation in an important vote. Enclosed are a proxy statement and a prospectus describing the Plan of Conversion and your voting and subscription rights. YOUR VOTE IS VERY IMPORTANT.

Enclosed, as part of the proxy materials, is your proxy card, the detachable section on top of the order form bearing your name and address. Regardless of whether you wish to buy stock, this proxy card should be signed, dated, and returned to us prior to the Special Meeting of Members on [special meeting date]. Please take a moment now to sign and date the enclosed proxy card(s) and return them to us in the postage-paid envelope provided. You also can submit your vote on the internet or by telephone. Directions for submitting your vote can be found on the enclosed proxy card. FAILURE TO VOTE HAS THE SAME EFFECT AS VOTING AGAINST THE CONVERSION.

Please remember:

	Ø		Your deposit accounts will continue to be insured up to the maximum legal limit by the Federal Deposit Insurance Corporation (“FDIC”).
	Ø		There will be no change in the balance, interest rate or maturity of any deposit account or loan because of the conversion.
	Ø		Members have a right, but not an obligation, to buy OmniAmerican Bancorp, Inc. common stock and may do so without the payment of a commission or fee before it is offered to the general public.
	Ø		Like all stock, shares of OmniAmerican Bancorp, Inc. common stock issued in this offering will not be insured by the FDIC.

The enclosed prospectus contains a complete discussion of the conversion and stock offering. We urge you to read this document carefully. If you are interested in purchasing the common stock of OmniAmerican Bancorp, Inc., we must receive your Stock Order and Certification Form and payment prior to 12:00 noon, Central Standard Time, on December ___, 2009.

If you have any questions regarding the conversion and stock offering, please visit our Stock Information Center located at 1320 South University Drive, Suite 116, Forth Worth, Texas 76107 or call us at 1-(817) 367-5140. The Stock Information Center is open       a.m. to       p.m. Monday through Friday, except bank holidays.

Sincerely,

Tim Carter
President and Chief Executive Officer
OmniAmerican Bank

The shares of common stock being offered are not deposits or savings accounts and are not insured by the Federal Deposit Insurance Corporation or any other governmental agency.

This is not an offer to sell or a solicitation of an offer to buy common stock. The offer is made only by the prospectus.

Facts About The Conversion

The Board of Directors of OmniAmerican Bank unanimously adopted a Plan of Conversion (the “Plan”) pursuant to which OmniAmerican Bank will convert from the mutual to the stock form of ownership.

This brochure answers some of the most frequently asked questions about the conversion and about your opportunity to invest in the common stock of OmniAmerican Bancorp, Inc., the newly-formed corporation that will become the holding company for OmniAmerican Bank following the conversion.

Investment in the common stock of OmniAmerican Bancorp, Inc. involves certain risks. For a discussion of these risks and other factors, including a complete description of the offering, investors are urged to read the accompanying prospectus, especially the discussion under the heading “Risk Factors.”

Why is OmniAmerican Bank converting to the stock form of organization?

A conversion to the stock form of organization will enable OmniAmerican Bank to access additional capital through the sale of common stock by OmniAmerican Bancorp, Inc. This additional capital will increase our capital levels to support future growth, give greater flexibility to structure and finance the expansion of our operations, provide a broader platform to expand products and services to customers, provide better capital management tools and implement equity compensation plans to retain and attract qualified directors and employees.

What effect will the conversion have on existing deposit and loan accounts and customer relationships?

The conversion will have no effect on existing deposit or loan accounts and customer relationships. Deposits will continue to be federally insured by the Federal Deposit Insurance Corporation to the maximum legal limit. Interest rates and existing terms and conditions on deposit accounts will remain the same upon completion of the conversion. Contractual obligations of borrowers of OmniAmerican Bank will not change and there will be no change in the amount, interest rate, maturity, security or any other condition relating to the respective loans of customers.

Are OmniAmerican Bank’s depositors required to purchase stock in the conversion?

No depositor or other person is required to purchase stock. However, depositors and other eligible persons will be provided the opportunity to purchase stock consistent with the established priority of subscription rights, should they so desire. The decision to purchase stock will be exclusively that of each person. Whether an individual decides to purchase stock or not will have no positive or negative impact on his or her standing as a customer of OmniAmerican Bank. The conversion will allow depositors of OmniAmerican Bank an opportunity to buy common stock and become shareholders of OmniAmerican Bancorp, Inc.

Who is eligible to purchase common shares in the subscription offering?

Certain past and present depositors, as well as the company’s tax qualified employee benefit plans, of OmniAmerican Bank are eligible to purchase common stock in the subscription offering.

How many common shares are being offered and at what price?

OmniAmerican Bancorp, Inc. is offering up to 10,350,000 shares of common stock, subject to adjustment as described in the prospectus, at a price of $10.00 per share, through the prospectus.

How many shares may I buy?

The minimum order is 25 shares. The maximum individual purchase is 30,000 shares. No person, together with associates of, and persons acting in concert with such person, may purchase more than 50,000 shares of common stock, as further discussed in the prospectus.

Will the common stock be insured?

No. Like any other common stock, OmniAmerican Bancorp, Inc.’s common stock will not be insured.

How do I order the common stock?

You must complete the enclosed Stock Order and Certification Form. Instructions for completing your Stock Order and Certification Form are contained on the back of the stock order form. Your order must be received by 12:00 noon, Central Standard Time, on December ___, 2009.

How may I pay for my common stock?

First, you may pay for common stock by check or money order made payable to OmniAmerican Bancorp, Inc. Interest will be paid by OmniAmerican Bancorp, Inc. on these funds at OmniAmerican Bank’s passbook savings rate from the day the funds are received until the completion or termination of the conversion. Second, you may authorize us to withdraw funds from your deposit account or certificate of deposit at OmniAmerican Bank for the amount of funds you specify for payment. You will not have access to these funds from the day we receive your order until completion or termination of the conversion. There is no penalty for early withdrawal from a certificate of deposit.

Can I purchase stock using funds in my OmniAmerican Bank IRA?

Yes. To do so, however, you must first establish a self-directed IRA at an unaffiliated brokerage firm or trust department and transfer a portion or all of the funds in your IRA at OmniAmerican Bank. Please contact your broker or self-directed IRA provider as soon as possible if you want to explore this option, as these transactions take time.

Will dividends be paid on the common stock?

Following the offering, OmniAmerican Bancorp, Inc.’s board of directors will consider a policy of paying regular cash dividends. However, whether or not dividends will be paid, the timing and amount of such dividends is currently undetermined.

How will the common stock be traded?

OmniAmerican Bancorp, Inc.’s stock is expected to trade on the Nasdaq Global Market under the ticker symbol “OABC .” However, no assurance can be given that an active and liquid market will develop.

Are executive officers and directors of OmniAmerican Bank planning to purchase stock?

Yes! The executive officers and directors, together with their associates, of OmniAmerican Bank plan to purchase, in the aggregate, $1.8 million worth of stock or approximately 2.3% of the common stock offered at the minimum of the offering range.

Must I pay a commission?

No. You will not be charged a commission or fee on the purchase of common stock in the conversion.

Should I vote to approve the Plan of Conversion?

Your Board of Directors unanimously recommends a vote “FOR” the Plan of Conversion. Your “YES” vote is very important! Failure to vote has the same effect as a vote against the plan. You can submit your vote by returning the enclosed proxy card(s) or by voting on the internet or by telephone. Directions for submitting your vote can be found on the enclosed proxy card.

PLEASE VOTE, SIGN, DATE AND RETURN ALL PROXY CARDS!

Why did I get several proxy cards?

If you have more than one account, you could receive more than one proxy card, depending on the ownership structure of your accounts. Please vote all of the proxy cards you receive.

How many votes do I have?

Every depositor is entitled to cast one vote for each $100, or fraction thereof, on deposit as of the voting record date, up to 1,000 votes.

May I vote in person at the special meeting?

Yes, but we would still like you to sign, date and mail your proxy today. If you decide to revoke your proxy, you may do so at any time before such proxy is exercised by executing and delivering a later dated proxy or by giving notice of revocation in writing or by voting in person at the special meeting. Attendance at the special meeting will not, of itself, revoke a proxy.

For additional information please call our Stock Information Center Monday — Friday, from ___ a.m. to ___ p.m. Central Standard time, or visit us at 1320 South University Drive, Suite 116, Fort Worth, Texas 76107.

Stock Information Center: 1-(817) 367-5140

QUESTIONS

AND

ANSWERS

Proposed Holding Company for

OmniAmerican Bank

The shares of common stock being offered are not deposits or savings accounts and are not insured by the Federal Deposit Insurance Corporation or any other governmental agency.

This is not an offer to sell or a solicitation of an offer to buy common stock. The offer is made only by the prospectus.

OmniAmerican Bank Website Message:

Plan of Conversion
Information

OmniAmerican Bank is pleased to announce that materials were mailed on November ___, 2009 regarding OmniAmerican Bank’s Plan of Conversion and the stock offering by OmniAmerican Bancorp, Inc. If you were a depositor as of March 31, 2008, September 30, 2009 or                     , 2009, you should be receiving a packet of materials soon. We encourage you to read the information carefully.

If you were a member of OmniAmerican Bank as of the Voting Record Date,                     , 2009, a proxy card(s) is included. We encourage you to sign, date and return ALL proxy cards as promptly as possible. You also can submit your vote on the internet or by telephone. Directions for submitting your vote can be found on the enclosed proxy card.

Information, including a prospectus in regards to OmniAmerican Bancorp, Inc.’s stock offering, was also enclosed. The subscription offering has commenced and continues until 12:00 noon, Central Standard Time, on December ___, 2009, at which time your order must be received if you want to take part in the offering.

Depending upon the outcome of the subscription offering that expires on December ___, 2009, our best estimate at this time for trading of the OmniAmerican Bancorp, Inc. stock on the Nasdaq Global Market is early January. As described in the prospectus, it could be later. The stock will trade under the ticker symbol “OABC”. We will keep you as informed as possible on this site.

If you have any questions regarding the conversion and stock offering, please visit our Stock Information Center located at 1320 South University Drive, Suite 116, Fort Worth, Texas 76107 or call us at 1-(817) 367-5140. The Stock Information Center is open ___ a.m. to ___ p.m. Monday through Friday, except bank holidays

The shares of common stock being offered are not deposits or savings accounts and are not insured by the Federal Deposit Insurance Corporation or any other governmental agency.

This is not an offer to sell or a solicitation of an offer to buy common stock. The offer is made only by the prospectus.

                    , 2009

Dear Valued OmniAmerican Bank Customer:

We recently forwarded you a proxy statement and related materials regarding a proposal to convert OmniAmerican Bank from the mutual to the stock form of ownership. This conversion will allow us to operate in essentially the same manner as we currently operate, but provide us with the flexibility to increase our capital, continue to support future lending and operational growth, and support future branching activities and/or the acquisition of financial services companies.

As of the date of this letter, your vote on our Plan of Conversion has not yet been received. Your Board of Directors unanimously recommends a vote “FOR” the Plan of Conversion.

If you have already voted, please accept our thanks and disregard this request. If you have not yet voted your proxy card, we would sincerely appreciate you signing the enclosed proxy card and returning it promptly in the enclosed postage-paid envelope. You can also vote on the Internet or by Telephone. Directions for submitting your vote can be found on the enclosed proxy card. Our meeting on                     , 2009 is fast approaching and we’d like to receive your vote as soon as possible.

Voting “FOR” the conversion does not affect the terms or insurance on your accounts. Failure to vote has the same effect as a vote against the plan. For further information, please call our Stock Information Center at 1-(817) 367-5140.

Best regards and thank you,

Tim Carter
President and Chief Executive Officer
OmniAmerican Bank

The shares of common stock being offered are not deposits or savings accounts and are not insured by the Federal Deposit Insurance Corporation or any other governmental agency.

This is not an offer to sell or a solicitation of an offer to buy common stock. The offer is made only by the prospectus.

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To:		Participants in the OmniAmerican Bank 401(k) Profit Sharing Plan
From:		OmniAmerican Bank
Date:		, 2009
Re:		Purchasing OmniAmerican Bancorp, Inc. Stock through the 401(k) Plan

The following questions and answers are intended to help explain how participants in the OmniAmerican Bank 401(k) Profit Sharing Plan (the “401(k) Plan”) can purchase participation interest representing an ownership interest in OmniAmerican Bancorp, Inc. common stock, through a newly established investment option known as the OmniAmerican Bancorp, Inc. Stock Fund. OmniAmerican Bancorp, Inc. is offering its common stock for sale on a priority basis to depositors and OmniAmerican Bank tax-qualified plans in connection with the conversion of OmniAmerican Bank from mutual to stock form. You should read the Prospectus and Prospectus Supplement that have been provided to you, which provide more complete information about purchasing participation interest representing an ownership interest in the OmniAmerican Bancorp, Inc. common stock through the 401(k) Plan and about the stock offering.

In connection with the stock offering, participants in the 401(k) Plan may purchase participation interests representing an ownership interest in OmniAmerican Bancorp, Inc. common stock through the 401(k) Plan by transferring all or a portion of their account balance to the “Stock Offering.” Upon the close of the stock offering, the shares purchased with the amounts directed to the “Stock Offering” will be transferred to the OmniAmerican Bancorp, Inc. Stock Fund, a new investment fund established to hold shares of OmniAmerican Bancorp Inc. in the 401(k) Plan. If you have questions about placing an order to purchase OmniAmerican Bancorp, Inc. common stock inside the 401(k) Plan, contact Gina Heppel, Benefits Manager, OmniAmerican Bank, telephone number: (817) 367-4645; fax: (817) 367-5483; email: Gina.Heppel@omniamerican.com.

If you have general questions about the stock offering or about placing an order for stock outside of the 401(k) Plan, you should call the Stock Information Center at (817) 367-5140.

Q1: How can I buy OmniAmerican Bancorp, Inc. common stock in the offering through my 401(k) Plan account?

As a participant in the 401(k) Plan, you may subscribe for OmniAmerican Bancorp, Inc. common stock by transferring funds to the “Stock Offering” to purchase participation interests in such common stock. Your interest in the common stock is referred to as participation interests because your ownership of the stock is “indirect” and arises from your participation in the 401(k) Plan. The purchase price of one “participation interest,” which represents one share of OmniAmerican Bancorp, Inc. common stock, is $10.00, the same amount that purchasers will pay in the offering for shares that they acquire directly. Whether or not you participate in the

offering, you will be able to purchase participation interests in OmniAmerican Bancorp, Inc. common stock after the offering through the 401(k) Plan, at the market price applicable at the time, which may be higher or lower than the $10.00 price in the offering. After the offering closes and the shares begin to trade in the open market, you may transfer funds to the OmniAmerican Bancorp, Inc. Stock Fund in the 401(k) Plan. The OmniAmerican Bancorp, Inc. Stock Fund will replace the “Stock Offering” at the end of the stock offering.

Q2: How many shares may I purchase through the 401(k) Plan?

You may use your entire account balance to purchase participation interests representing an ownership interest in OmniAmerican Bancorp, Inc. common stock in the stock offering, subject to the purchase priorities and limitations set forth in the plan of conversion. (Of course, before you decide to use your entire account balance to purchase shares, you should consider the benefits of maintaining a diversified portfolio of assets in the 401(k) Plan.) If you elect to purchase participation interests in the stock offering through the 401(k) Plan, you must purchase a minimum of 25 participation interests in the stock offering. The maximum purchase limitation is 30,000 shares/participation interests per individual (e.g. $300,000) or 50,000 shares/participation interests (e.g., $500,000) for persons acting in concert. See the Prospectus for a definition of “acting in concert.”

Q3: Will I receive all of my order?

If the offering is oversubscribed (i.e., more orders to purchase shares is received than the total number of shares that are available for purchase) you may not receive some or all of your order.

Q4: If I want to buy participation interests representing an ownership interest in OmniAmerican Bancorp, Inc. common stock in the 401(k) Plan, what do I do?

You are allowed only one election to transfer funds to the Stock Offering in the 401(k) Plan. In order to purchase participation interests through the 401(k) Plan, follow the steps which are set forth both in the Prospectus Supplement and in the brochure entitled “401(k) OmniAmerican Bancorp Stock Offering Online Election Instructions.”

After you have completed your election, you will also need to complete the Stock Information Form and return it to the Human Resources Department, OmniAmerican Bank in the self-addressed envelope provided by December ___, 2009. It is critical that this Stock Information Form be completed and returned.

Q5: How do I purchase shares both through the 401(k) Plan and outside the 401(k) Plan?

In order to purchase participation interests representing an ownership interest in OmniAmerican Bancorp, Inc. common stock through the 401(k) Plan, you must make your election online and complete the Stock Information Form and return it to the Human Resources Department, OmniAmerican Bank, no later than                     , on                                         , 2009. In order to purchase shares outside the 401(k) Plan (in your name or through an IRA) you must complete

and return a Stock Order Form, along with payment by check or by authorizing a withdrawal from your OmniAmerican Bank deposit account(s) to the Stock Information Center no later than                     , on                                         , 2009. If you do not have a Stock Order Form, contact the Stock Information Center.

Q6: Is there a tax-qualified way for me to buy OmniAmerican Bancorp, Inc. common stock outside the 401(k) Plan?

If you have an individual retirement account or individual retirement annuity (IRA), you may be able to purchase shares of common stock of OmniAmerican Bancorp, Inc. in the offering with your interest in your IRA. If your IRA is with OmniAmerican Bank, you will first be required to transfer your IRA to a self-directed account (such as a brokerage account) maintained by an independent trustee in order to purchase shares. Call the Stock Information Center promptly for assistance with IRA purchases! They take time to process.

Q7: Why must I purchase through the 401(k) Plan by                     , 2009, but the Prospectus says that I can return my Stock Order Form to the Stock Information Center by                     , 2009?

The 401(k) Plan needs to have enough time to determine how many shares to purchase for the OmniAmerican Bancorp, Inc. Stock Fund and, therefore, you are required to indicate the number of participation interests you want to purchase by                      on                                         , 2009. The 401(k) Plan will then submit an Order Form to the Stock Information Center on behalf of the 401(k) Plan no later than                     , Central Time, on                                         , 2009. If you do not make your online election by                      on                                         , 2009, you will not be able to purchase participation interests through your 401(k) account in the stock offering. However, after the stock offering, you generally may invest your 401(k) account in the OmniAmerican Bancorp, Inc. Stock Fund at any time. Please note that federal law restricts certain “insiders” from trading in the stock fund during “black out” periods. Please see                                         , OmniAmerican Bank, if you have questions about the black out period trading restrictions.

Q8: Should I keep a copy of my Stock Information Form?

It is always a good idea to keep a copy of your Stock Information Form.

Q9: Can I use interoffice mail to get my Stock Information Form to                                         , OmniAmerican Bank, by                      on                                         , 2009?

You can either use interoffice mail, facsimile, regular mail or return your Stock Information Form in person. Remember, if you use interoffice mail, facsimile, or regular mail, your form must be received by                                         , OmniAmerican Bank, no later than                      Central Time, on                                         , 2009

Q10: May I change my mind after I make my online election to transfer funds to the OmniAmerican Bancorp, Inc. Stock Offering?

No. Once you make your online election to transfer funds from the various mutual funds in the 401(k) Plan to the OmniAmerican Bancorp, Inc. Stock Offering, your election is irrevocable. Once the offering is concluded, you will be entitled to transfer assets in and out of the OmniAmerican Bancorp, Inc. Stock Offering when the stock begins to trade in the open market.

Q11: When will my account be credited with shares in the OmniAmerican Bancorp, Inc. Stock Fund?

Your investment in the new OmniAmerican Bancorp, Inc. Stock Fund will be credited after all orders have been processed, subject to completion of the offering. You will not have access to the amounts in your account credited to the OmniAmerican Bancorp, Inc. Stock Fund until after the closing of the offering, expected to occur in January.

Q12: Will I receive a stock certificate for my 401(k) order?

No. Your request to purchase shares through the 401(k) Plan will be deemed to be a request to purchase an ownership interest in participation interest in the OmniAmerican Bancorp, Inc. Stock Fund. You will only be entitled to a distribution of your interest in the 401(k) Plan in accordance with the provisions of the 401(k) Plan.