UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 -------- FORM N-CSRS -------- CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER 811-03231 SEI LIQUID ASSET TRUST (Exact name of registrant as specified in charter) -------- c/o CT Corporation 101 Federal St. Boston, MA 02110 (Address of principal executive offices) (Zip code) c/o SEI Investments Company One Freedom Valley Drive Oaks, PA 19456 (Name and address of agent for service) COPIES TO: Richard W. Grant, Esq. Morgan, Lewis & Bockius LLP 1701 Market Street Philadelphia, PA 19103 REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: 1-800-342-5734 DATE OF FISCAL YEAR END: JUNE 30, 2007 DATE OF REPORTING PERIOD: DECEMBER 31, 2006 ITEM 1. REPORTS TO STOCKHOLDERS. [LOGO OMITTED] SEI New ways. New answers(R) - -------------------------------------------------------------------------------- SEI Liquid Asset Trust - -------------------------------------------------------------------------------- Semi-Annual Report as of December 31, 2006 - -------------------------------------------------------------------------------- Prime Obligation Fund - -------------------------------------------------------------------------------- TABLE OF CONTENTS - -------------------------------------------------------------------------------- Schedule of Investments 1 - -------------------------------------------------------------------------------- Statement of Assets and Liabilities 3 - -------------------------------------------------------------------------------- Statement of Operations 4 - -------------------------------------------------------------------------------- Statements of Changes in Net Assets 5 - -------------------------------------------------------------------------------- Financial Highlights 6 - -------------------------------------------------------------------------------- Notes to Financial Statements 7 - -------------------------------------------------------------------------------- Disclosure of Fund Expenses 9 - -------------------------------------------------------------------------------- The Trust files its complete schedule of portfolio holdings with the Securities and Exchange Commission for the first and third quarters of each fiscal year on Form N-Q within sixty days after the end of the period.The Trust's Forms N-Q are available on the Commission's website at http://www.sec.gov, and may be reviewed and copied at the Commission's Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. A description of the policies and procedures that the Trust uses to determine how to vote proxies relating to portfolio securities, as well as information relating to how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30, is available (i) without charge, upon request, by calling 1-800-DIAL-SEI; and (ii) on the Commission's website at http://www.sec.gov. SCHEDULE OF INVESTMENTS (Unaudited) Prime Obligation Fund December 31, 2006 - -------------------------------------------------------------------------------- [BAR CHART OMITTED] Plot Points for EDGAR purposes are as follows: SECTOR WEIGHTINGS (UNAUDITED)*: 37.6% Commercial Paper 34.3% Corporate Obligations 16.1% Repurchase Agreements 8.5% Certificates of Deposit 3.5% Insurance Funding Agreement *Percentages based on total investments. - -------------------------------------------------------------------------------- Face Amount Value Description ($ Thousands) ($ Thousands) - -------------------------------------------------------------------------------- COMMERCIAL PAPER+ -- 37.7% FINANCIAL SERVICES (B) -- 37.7% Carrera Capital Finance LLC 5.395%, 01/08/07 $10,000 $ 9,989 Citibank Credit Card Issuance Trust 5.347%, 02/14/07 10,000 9,936 Concord Minutemen Capital Corporation 5.367%, 01/10/07 20,000 19,973 Crown Point Capital Company 5.357%, 01/10/07 15,000 14,980 Deer Valley Funding LLC 5.343%, 01/23/07 25,000 24,919 Georgetown Funding Company 5.343%, 01/17/07 25,000 24,941 5.389%, 01/24/07 15,000 14,949 Giro Balanced Funding Corporation 5.280%, 02/20/07 25,000 24,817 Klio II Funding Corporation 5.342%, 01/22/07 25,000 24,922 Klio III Funding Corporation 5.390%, 01/26/07 15,000 14,944 Lexington Parker Capital 5.359%, 01/12/07 15,000 14,976 Manhattan Asset Funding Company 5.316%, 01/31/07 25,000 24,890 Millstone Funding Corporation 5.319%, 01/18/07 10,000 9,975 Ormond Quay Funding LLC 5.329%, 01/16/07 15,000 14,967 Rhineland Funding Capital Corporation 5.374%, 01/05/07 15,000 14,991 5.413%, 04/05/07 10,000 9,861 Sunbelt Funding Corporation 5.338%, 01/19/07 16,051 16,009 5.339%, 02/09/07 15,000 14,914 Versailles LLC 5.366%, 01/08/07 15,000 14,984 White Pine Finance LLC 5.322%, 02/01/07 10,000 10,000 -------- Total Commercial Paper (Cost $345,937) ($ Thousands) 329,937 -------- - -------------------------------------------------------------------------------- Face Amount Value Description ($ Thousands) ($ Thousands) - -------------------------------------------------------------------------------- CORPORATE OBLIGATIONS (A) -- 34.4% BANKS -- 5.2% Comerica Bank 5.350%, 01/12/07 $25,000 $ 25,000 National City Bank Cleveland 5.315%, 03/19/07 20,000 19,998 -------- 44,998 -------- FINANCIAL SERVICES -- 23.5% Atlas Capital Funding Corporation MTN 5.340%, 01/16/07 25,000 25,000 5.340%, 01/25/07 10,000 10,000 Carrera Capital Finance 5.330%, 01/29/07 20,000 20,000 5.340%, 12/12/07 10,000 10,000 Cullinan Finance Corporation MTN, Ser 2 (B) 5.320%, 03/15/07 20,000 20,000 K2 LLC 5.320%, 01/24/07 7,000 6,999 Liquid Funding Ltd. (B) 5.400%, 01/22/07 25,000 24,999 Ormond Quay Funding LLC 5.310%, 01/31/07 12,500 12,497 Rhineland Funding Capital Corporation+ 5.350%, 02/07/07 16,000 16,000 Stanfield Victoria Funding LLC 5.325%, 03/26/07 10,000 9,998 Tango Finance Corporation (B) 5.380%, 03/05/07 25,000 25,004 White Pine Finance LLC MTN (B) 5.337%, 01/25/07 25,000 24,999 -------- 205,496 -------- INSURANCE -- 2.3% ASIF Global Finance XXXI (B) 5.370%, 02/23/07 20,000 20,001 -------- INVESTMENT BANKERS/BROKER DEALERS -- 3.4% Goldman Sachs Group Incorporated 5.410%, 01/13/07 20,000 20,000 Goldman Sachs Group Incorporated MTN, Ser 1 5.510%, 01/09/07 10,000 10,000 -------- 30,000 -------- Total Corporate Obligations (Cost $284,495) ($ Thousands) 300,495 -------- - -------------------------------------------------------------------------------- SEI Liquid Asset Trust / Semi-Annual Report / December 31, 2006 1 SCHEDULE OF INVESTMENTS (Unaudited) Prime Obligation Fund (Concluded) December 31, 2006 - -------------------------------------------------------------------------------- Face Amount Value Description ($ Thousands) ($ Thousands) - -------------------------------------------------------------------------------- CERTIFICATES OF DEPOSIT -- 8.6% FINANCIAL SERVICES -- 8.6% Brahms Funding Corporation 5.346%, 01/10/07 $25,000 $ 24,967 5.334%, 01/25/07 10,000 9,965 East-Fleet Finance LLC (A) (B) 5.327%, 01/12/07 10,000 10,000 KKR Atlantic Funding Trust 5.384%, 01/26/07 20,000 19,925 Ormond Quay Funding LLC (A) 5.305%, 01/12/07 10,000 10,000 -------- Total Certificates of Deposit (Cost $74,857) ($ Thousands) 74,857 -------- INSURANCE FUNDING AGREEMENT (A) (C) -- 3.4% INSURANCE -- 3.4% MetLife Funding Agreement 5.444%, 01/15/07 30,000 30,000 -------- Total Insurance Funding Agreement (Cost $30,000) ($ Thousands) 30,000 -------- REPURCHASE AGREEMENTS (D) -- 16.1% BNP Paribas 5.270%, dated 12/29/06, to be repurchased on 01/03/07, repurchase price $77,146,147 (collateralized by various U.S. Government Obligations, ranging in par value $2,660,000-$27,872,000, 4.250%- 5.125%, 08/08/07-05/15/09; with total market value $78,645,299) 77,101 77,101 Deutsche Bank 5.250%, dated 12/29/06, to be repurchased on 01/03/07, repurchase price $64,037,333 (collateralized by various U.S. Government Obligations, ranging in par value $18,749,000-$38,781,000, 4.500%- 6.625%, 01/15/14-11/15/30; with total market value $65,280,883) 64,000 64,000 -------- Total Repurchase Agreements (Cost $141,101) ($ Thousands) 141,101 -------- Total Investments -- 100.2% (Cost $876,390) ($ Thousands) $876,390 ======== - -------------------------------------------------------------------------------- Description - -------------------------------------------------------------------------------- Percentages are based on Total Net Assets of $874,607. + The rate reported is the effective yield at time of purchase. (A) Variable rate instrument. The rate reflected on the Statement of Net Assets is the rate in effect on December 31, 2006. The date shown is the earlier of the reset date or demand date. (B) Securities sold within terms of a private placement memorandum, exempt from registration under Section 144A of the Securities Act of 1933, as amended, and may be sold only to dealers in that program or other "accredited investors". These securities have been determined to be liquid under guidelines established by the Board of Trustees. (C) Securities considered illiquid. The total value of such securities as of December 31, 2006 was $30,000 ($ Thousands) and represented 3.4% of Net Assets. (D) Tri-Party Repurchase Agreement LLC -- Limited Liability Company MTN -- Medium Term Note Ser -- Series The accompanying notes are an integral part of the financial statements. - -------------------------------------------------------------------------------- 2 SEI Liquid Asset Trust / Semi-Annual Report / December 31, 2006 Statement of Assets and Liabilities ($ Thousands) as of December 31, 2006 (Unaudited) - -------------------------------------------------------------------------------- PRIME OBLIGATION FUND - -------------------------------------------------------------------------------- ASSETS: Investments at value (Cost $735,289) $735,289 Repurchase Agreement (Cost $141,101) 141,101 Accrued income 2,180 Cash 1 Prepaid expenses 22 - -------------------------------------------------------------------------------- Total Assets 878,593 - -------------------------------------------------------------------------------- LIABILITIES: Payable for Income Distribution 3,577 Payable due to Administrator 257 Payable due to Investment Adviser 31 Payable for Trustees' Fee 2 Accrued expenses 119 - -------------------------------------------------------------------------------- Total Liabilities 3,986 - -------------------------------------------------------------------------------- Net Assets $874,607 - -------------------------------------------------------------------------------- NET ASSETS: Paid-in Capital $874,664 Accumulated net realized loss on investments (57) - -------------------------------------------------------------------------------- Net Assets $874,607 - -------------------------------------------------------------------------------- Net Asset Value, Offering and Redemption Price Per Share -- Class A Shares ($874,607 / 874,664) $1.00 - -------------------------------------------------------------------------------- The accompanying notes are an integral part of the financial statements. - -------------------------------------------------------------------------------- SEI Liquid Asset Trust / Semi-Annual Report / December 31, 2006 3 Statement of Operations ($ Thousands) For the six month period ended December 31, 2006 (Unaudited) - -------------------------------------------------------------------------------- PRIME OBLIGATION FUND - -------------------------------------------------------------------------------- INVESTMENT INCOME: Interest Income $22,310 - -------------------------------------------------------------------------------- EXPENSES: Administration Fees 1,746 Shareholder Servicing Fees -- Class A 1,040 Investment Advisory Fees 215 Trustees' Fees 13 Printing Fees 72 Professional Fees 47 Registration Fees 18 Custodian/Wire Agent Fees 18 Insurance Expense 2 Other Expenses 7 - -------------------------------------------------------------------------------- Total Expenses 3,178 - -------------------------------------------------------------------------------- Less, Waiver of: Administration Fees (310) Shareholder Servicing Fees -- Class A (1,040) - -------------------------------------------------------------------------------- Net Expenses 1,828 - -------------------------------------------------------------------------------- NET INVESTMENT INCOME 20,482 - -------------------------------------------------------------------------------- Net Realized Loss on Investments (10) - -------------------------------------------------------------------------------- NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $20,472 - -------------------------------------------------------------------------------- The accompanying notes are an integral part of the financial statements. - -------------------------------------------------------------------------------- 4 SEI Liquid Asset Trust / Semi-Annual Report / December 31, 2006 Statement of Changes in Net Assets ($ Thousands) For the six month period ended December 31, 2006 (Unaudited) and the year ended June 30, 2006 - ------------------------------------------------------------------------------------------------------------------------------------ PRIME OBLIGATION FUND - ------------------------------------------------------------------------------------------------------------------------------------ 07/01/06 to 07/01/05 12/31/06 6/30/06 - ------------------------------------------------------------------------------------------------------------------------------------ OPERATIONS: Net Investment Income $ 20,482 $ 27,790 Net Realized Loss on Investments (10) (3) - ------------------------------------------------------------------------------------------------------------------------------------ Net Increase in Net Assets Resulting from Operations 20,472 27,787 - ------------------------------------------------------------------------------------------------------------------------------------ DIVIDENDS FROM: Net Investment Income: Class A (20,482) (27,787) - ------------------------------------------------------------------------------------------------------------------------------------ Total Dividends (20,482) (27,787) - ------------------------------------------------------------------------------------------------------------------------------------ CAPITAL SHARE TRANSACTIONS (ALL AT $1.00 PER SHARE): Class A: Proceeds from Shares Issued 2,643,901 5,455,955 Reinvestment of Dividends 17,979 22,105 Cost of Shares Redeemed (2,642,860) (5,321,419) - ------------------------------------------------------------------------------------------------------------------------------------ Increase in Net Assets Derived from Capital Share Transactions 19,020 156,641 - ------------------------------------------------------------------------------------------------------------------------------------ Net Increase in Net Assets 19,010 156,641 - ------------------------------------------------------------------------------------------------------------------------------------ NET ASSETS: BEGINNING OF PERIOD 855,597 698,956 - ------------------------------------------------------------------------------------------------------------------------------------ END OF PERIOD $ 874,607 $ 855,597 - ------------------------------------------------------------------------------------------------------------------------------------ Undistributed Net Investment Income $ -- $ -- - ------------------------------------------------------------------------------------------------------------------------------------ Amounts designated as "--" are $0 or have been rounded to $0. The accompanying notes are an integral part of the financial statements. - -------------------------------------------------------------------------------- SEI Liquid Asset Trust / Semi-Annual Report / December 31, 2006 5 Financial Highlights For the six month period ended December 31, 2006 (Unaudited) and the years ended June 30, For a share outstanding throughout each year - ------------------------------------------------------------------------------------------------------------------------------------ Net Realized and Net Asset Unrealized Total Dividends Value, Net Gains from from Net Net Asset Beginning Investment on Investment Investment Total Value, End of Period Income Securities Operations Income Dividends of Period - ------------------------------------------------------------------------------------------------------------------------------------ PRIME OBLIGATION FUND CLASS A: 2006* $1.00 $0.02 $-- $0.02 $(0.02) $(0.02) $1.00 2006 1.00 0.04 -- 0.04 (0.04) (0.04) 1.00 2005 1.00 0.02 -- 0.02 (0.02) (0.02) 1.00 2004 1.00 0.01 -- 0.01 (0.01) (0.01) 1.00 2003 1.00 0.01 -- 0.01 (0.01) (0.01) 1.00 2002 1.00 0.02 -- 0.02 (0.02) (0.02) 1.00 - ------------------------------------------------------------------------------------------------------------------------------------ Ratio of Expenses Ratio of Net Ratio of to Average Investment Net Assets Expenses Net Assets Income Total End of Period to Average (Excluding to Average Return+ ($ Thousands) Net Assets Waivers) Net Assets - ------------------------------------------------------------------------------------------------------------------------------------ PRIME OBLIGATION FUND CLASS A: 2006* 2.47% $ 874,607 0.44% 0.76% 4.93% 2006 3.88 855,597 0.44 0.76 3.82 2005 1.81 698,956 0.44 0.77 1.77 2004 0.68 887,109 0.44 0.77 0.68 2003 1.12 1,050,594 0.44 0.76 1.11 2002 2.08 1,026,880 0.44 0.75 2.05 * For the six month period ended December 31, 2006. All ratios have been annualized. + Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. Amounts designated as "--" are $0 or have been rounded to $0. The accompanying notes are an integral part of the financial statements. - -------------------------------------------------------------------------------- 6 SEI Liquid Asset Trust / Semi-Annual Report / December 31, 2006 Notes to Financial Statements December 31, 2006 1. ORGANIZATION SEI Liquid Asset Trust (the "Trust") was organized as a Massachusetts business trust under a Declaration of Trust dated July 20, 1981. The Trust is registered under the Investment Company Act of 1940, as amended, as a diversified, open-end management investment company with one fund: the Prime Obligation Fund (the "Fund"). The Trust is registered to offer Class A shares of the Fund. A description of the Fund's investment objectives, policies, and strategies are provided in the prospectus. 2. SIGNIFICANT ACCOUNTING POLICIES The following is a summary of significant accounting policies followed by the Trust. USE OF ESTIMATES -- The preparation of financial statements in conformity with generally accepted accounting principles in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. SECURITY VALUATION -- Investment securities are stated at amortized cost, which approximates market value. Under this valuation method, purchase discounts and premiums are accreted and amortized ratably to maturity. REPURCHASE AGREEMENTS -- The Fund invests in tri-party repurchase agreements. Securities held as collateral for tri-party repurchase agreements are maintained in a segregated account by the broker's custodian bank. Provisions of the agreements and the Trust's policies ensure that the market value of the collateral, including accrued interest thereon, is sufficient to cover interest and principal in the event of default by the counterparty. If the counterparty defaults and the value of the collateral declines or if the counterparty enters an insolvency proceeding, realization of the collateral by the Fund may be delayed or limited. EXPENSES -- Expenses that are directly related to the Fund are charged directly to the Fund. SECURITY TRANSACTIONS AND INVESTMENT INCOME -- Security transactions are accounted for on the trade date. Costs used in determining realized gains and losses on the sale of investment securities are on the basis of specific identification. Interest income is recognized using the accrual basis of accounting. All amortization is calculated using the straight line method over the holding period of the security. Amortization of premiums and accretion of discounts are included in interest income. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS -- Dividends from net investment income are declared on a daily basis and are payable on the first business day of the following month. Any net realized capital gains of the Fund are distributed to the shareholders of the Fund annually. 3. AGREEMENTS AND OTHER TRANSACTIONS WITH AFFILIATES ADMINISTRATION AND TRANSFER AGENCY AGREEMENT -- SEI Investments Global Funds Services (the "Administrator") provides administrative services to the Trust for an annual fee, which is calculated daily and paid monthly, of .42% of the average daily net assets of the Fund. The Administrator has contractually agreed to waive fees and to reimburse expenses, through June 30, 2007, in order to keep total operating expenses, net of SEI Investments Management Corporation ("SIMC") and SEI Investments Distribution Co.'s (the "Distributor") fee waivers, from exceeding .44% of the average daily net assets of the Fund. The Distributor is a wholly-owned and operated subsidiary of SEI Investments Company and a registered broker-dealer. DISTRIBUTION AGREEMENT -- The Distributor acts as the distributor of the shares of the Trust under a Distribution Agreement. The Trust has adopted a shareholder servicing plan for its Class A shares (the "Class A Plan") pursuant to which a shareholder servicing fee of up to .25% of the average daily net assets attributable to Class A shares will be paid to the Distributor. Under the Class A Plan the Distributor may perform, or may compensate other service providers for performing, certain shareholder and administrative services. The Distributor has waived, on a voluntary basis, all of its shareholder servicing fee. Under the Class A Plan, the Distributor may retain as a profit any difference between the fee it receives and the amount it pays to third parties. Certain officers and/or trustees of the Trust are also officers and/or directors of the Administrator or SIMC. Compensation of officers and affiliated trustees of the Trust is paid by the Administrator and/or SIMC. U.S. Bank, N.A. which is a Trust shareholder, acts as custodian and wire agent for the Trust. - -------------------------------------------------------------------------------- SEI Liquid Asset Trust / Semi-Annual Report / December 31, 2006 7 Notes to Financial Statements (Concluded) 4. INVESTMENT ADVISORY AGREEMENT SIMC serves as the Fund's investment adviser and "manager of managers" under an investment advisory agreement. For its services, SIMC receives an annual fee equal to .075% of the Trust's average daily net assets up to $500 million and ..02% of such net assets in excess of $500 million. Columbia Management Advisors, LLC ("Columbia"), serves as the Fund's investment sub-adviser under an investment sub-advisory agreement. Columbia is paid by SIMC. SIMC compensates Columbia out of the fee it receives from the Fund. 5. FEDERAL INCOME TAXES It is the Fund's intention to continue to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code and distribute all of its taxable income. Accordingly, no provision for Federal income taxes is required. The timing and characterization of certain income and capital gains distributions are determined annually in accordance with Federal tax regulations which may differ from accounting principles generally accepted in the United States of America. As a result, net investment income (loss) and net realized gain (loss) on investment transactions for the reporting period may differ from distributions during such period. These book/tax differences may be temporary or permanent in nature. To the extent these differences are permanent, they are charged or credited to paid-in-capital, undistributed net investment income or accumulated net realized gain, as appropriate, in the period that the differences arise. The tax character of dividends paid to Class A shareholders during the years ended June 30, 2006 and June 30, 2005 were as follows ($ Thousands): - -------------------------------------------------------------------------------- Ordinary Income - -------------------------------------------------------------------------------- 2006 $27,787 2005 14,107 As of June 30, 2006, the components of accumulated losses on a tax basis were as follows ($ Thousands): Capital Loss Carryforwards: Expiring in 2011 $ (39) Expiring in 2013 (3) Expiring in 2014 (1) Undistributed Ordinary Income 3,149 Post-October Losses (4) Other Temporary Differences (3,149) ------- Total Accumulated Losses $ (47) ======= Post-October losses represent losses realized on investment transactions from November 1, 2005 through June 30, 2006, that, in accordance with Federal income tax regulations, the Fund defers and treats as having arisen in the following fiscal year. For Federal income tax purposes, capital loss carryforwards represent realized losses of the Fund that may be carried forward for a maximum period of eight years and applied against future capital gains. The cost basis of securities for Federal income tax purposes is equal to the cost basis used for financial reporting purposes. 6. NEW ACCOUNTING PRONOUNCEMENTS In June 2006, the Financial Accounting Standards Board (FASB) issued FASB Interpretation 48 (FIN 48), "Accounting for Uncertainty in Income Taxes." This standard defines the threshold for recognizing the benefits of tax-return positions in the financial statements as "more-likely-than-not" to be sustained by the taxing authority and requires measurement of a tax position meeting the more-likely-than-not criterion, based on the largest benefit that is more than 50 percent likely to be realized. FIN 48 is effective as of the beginning of the first fiscal year beginning after December 15, 2006. At adoption, companies must adjust their financial statements to reflect only those tax positions that are more-likely-than-not to be sustained as of the adoption date. As of December 31, 2006, the Fund does not believe the impact of the adoption of FIN 48 will be material to the financial statements. In September 2006, the FASB issued Statement on Financial Accounting Standards ("SFAS") No. 157, "Fair Value Measurements". This standard establishes a single authoritative definition of fair value, sets out a framework for measuring fair value and requires additional disclosures about fair value measurements. SFAS No. 157 applies to fair value measurements already required or permitted by existing standards. SFAS No. 157 is effective for financial statements issued for fiscal years beginning after November 15, 2007 and interim periods within those fiscal years. The changes to current generally accepted accounting principles from the application of this Statement relate to the definition of fair value, the methods used to measure fair value, and the expanded disclosures about fair value measurements. As of December 31, 2006, the Fund does not believe the adoption of SFAS No. 157 will impact the amounts reported in the financial statements; however, additional disclosures may be required about the inputs used to develop the measurements and the effect of certain of the measurements reported in the financial statements for a fiscal period. - -------------------------------------------------------------------------------- 8 SEI Liquid Asset Trust / Semi-Annual Report / December 31, 2006 Disclosure of Fund Expenses (Unaudited) All mutual funds have operating expenses. As a shareholder of a mutual fund, your investment is affected by these ongoing costs, which include (among others) costs for portfolio management, administrative services, and shareholder reports like this one. It is important for you to understand the impact of these costs on your investment returns. Operating expenses such as these are deducted from a mutual fund's gross income and directly reduce your final investment return. These expenses are expressed as a percentage of a mutual fund's average net assets; this percentage is known as a mutual fund's expense ratio. The following examples use the expense ratio and are intended to help you understand the ongoing costs (in dollars) of investing in your Fund and to compare these costs with those of other mutual funds. The examples are based on an investment of $1,000 made at the beginning of the period shown and held for the entire period. The table below illustrates your Fund's costs in two ways: O ACTUAL FUND RETURN. This section helps you to estimate the actual expenses after fee waivers that your Fund incurred over the period. The "Expenses Paid During Period" column shows the actual dollar expense cost incurred by a $1,000 investment in the Fund, and the "Ending Account Value" number is derived from deducting that expense cost from the Fund's gross investment return. You can use this information, together with the actual amount you invested in the Fund, to estimate the expenses you paid over that period. Simply divide your ending account value by $1,000 to arrive at a ratio (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply that ratio by the number shown for your Fund under "Expenses Paid During Period." O HYPOTHETICAL 5% RETURN. This section helps you compare your Fund's costs with those of other mutual funds. It assumes that the Fund had an annual 5% return before expenses during the year, but that the expense ratio (Column 3) for the period is unchanged. This example is useful in making comparisons because the Securities and Exchange Commission requires all mutual funds to make this 5% calculation. You can assess your Fund's comparative cost by comparing the hypothetical result for your Fund in the "Expenses Paid During Period" column with those that appear in the same charts in the shareholder reports for other mutual funds. NOTE: Because the return is set at 5% for comparison purposes -- NOT your Fund's actual return -- the account values shown may not apply to your specific investment. BEGINNING ENDING EXPENSES ACCOUNT ACCOUNT ANNUALIZED PAID VALUE VALUE EXPENSE DURING 7/1/06 12/31/06 RATIOS PERIOD* - -------------------------------------------------------------------------------- PRIME OBLIGATION FUND -- CLASS A - -------------------------------------------------------------------------------- ACTUAL FUND RETURN $1,000.00 $1,024.70 0.44% $2.25 HYPOTHETICAL 5% RETURN 1,000.00 1,022.99 0.44 2.24 * Expenses are equal to the Fund's annualized expense ratio multiplied by the average account value over the period, multiplied by 184/365 (to reflect one-half year period shown). - -------------------------------------------------------------------------------- SEI Liquid Asset Trust / Semi-Annual Report / December 31, 2006 9 Notes Notes Notes SEI Liquid Asset Trust Semi-Annual Report December 31, 2006 Robert A. Nesher, CHAIRMAN TRUSTEES William M. Doran F. Wendell Gooch James M. Storey George J. Sullivan, Jr. Rosemarie B. Greco Nina Lesavoy James M. Williams OFFICERS Robert A. Nesher PRESIDENT AND CHIEF EXECUTIVE OFFICER Stephen F. Panner CONTROLLER AND CHIEF FINANCIAL OFFICER Russell Emery CHIEF COMPLIANCE OFFICER Timothy D. Barto VICE PRESIDENT, SECRETARY Sofia A. Rosala VICE PRESIDENT, ASSISTANT SECRETARY James Ndiaye VICE PRESIDENT, ASSISTANT SECRETARY Michael T. Pang VICE PRESIDENT, ASSISTANT SECRETARY John J. McCue VICE PRESIDENT Nicole Welch ANTI-MONEY LAUNDERING COMPLIANCE OFFICER INVESTMENT ADVISER SEI Investments Management Corporation ADMINISTRATOR SEI Investments Global Funds Services DISTRIBUTOR SEI Investments Distribution Co. LEGAL COUNSEL Morgan, Lewis & Bockius LLP INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM KPMG LLP This report and the financial statements contained herein are submitted for the general information of the shareholders of the Trust and must be preceded or accompanied by a current prospectus. Shares of the Funds are not deposits or obligations of, or guaranteed or endorsed by, any bank. The shares are not federally insured by the Federal Deposit Insurance Corporation (FDIC), the Federal Reserve Board, or any other government agency. Investment in the shares involves risk, including the possible loss of principal. FOR MORE INFORMATION CALL 1 800 DIAL SEI (1 800 342 5734) [LOGO OMITTED] SEI New ways. New answers(R) SEI Investments Distribution Co. Oaks, PA 19456 1.800.DIAL.SEI (1.800.342.5734) SEI-F-103 (12/06) ITEM 2. CODE OF ETHICS. Not applicable for semi-annual report.. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Not applicable for semi-annual report.. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Not applicable for semi-annual report. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. Not applicable to open-end management investment companies. ITEM 6. SCHEDULE OF INVESTMENTS Not applicable. ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable to open-end management investment companies. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES Not applicable to open-end management investment companies. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT COMPANY AND AFFILIATED PURCHASERS. Not applicable to open-end management investment companies. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Not applicable for semi-annual report. ITEM 11. CONTROLS AND PROCEDURES. (a) The certifying officers, whose certifications are included herewith, have evaluated the registrant's disclosure controls and procedures within 90 days of the filing date of this report. Based on their evaluation, the certifying officers have concluded that the registrant's disclosure controls and procedures are adequately designed, and are operating effectively to ensure, that information required to be disclosed by the registrant in the reports it files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms. (b) There were no significant changes in the registrant's internal control over financial reporting that occurred during the registrant's last fiscal half-year that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEMS 12. EXHIBITS. (a)(1) Code of Ethics attached hereto. (a)(2) A separate certification for the principal executive officer and the principal financial officer of the registrant as required by Rule 30a-2(a) under the Investment Company Act of 1940, as amended (17 CFR 270.30a-2(a)), are filed herewith. (b) Officer certifications as required by Rule 30a-2(b) under the Investment Company Act of 1940, as amended (17 CFR 270.30a-2(b)) also accompany this filing as an Exhibit. - -------------------------------------------------------------------------------- SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) SEI Liquid Asset Trust By (Signature and Title)* /s/ Robert A. Nesher --------------------------- Robert A. Nesher President & CEO Date: February 21, 2007 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ Robert A. Nesher --------------------------- Robert A. Nesher President & CEO Date: February 21, 2007 By (Signature and Title)* /s/ Stephen F. Panner --------------------------- Stephen F. Panner Controller & CFO Date: February 21, 2007 * Print the name and title of each signing officer under his or her signature.