UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act File Number 811-21914 RIVERSOURCE SHORT TERM INVESTMENTS SERIES, INC. (Exact name of registrant as specified in charter) 50606 Ameriprise Financial Center, Minneapolis, Minnesota 55474 (Address of principal executive offices) (Zip code) Scott R. Plummer - 5228 Ameriprise Financial Center, Minneapolis, MN 55474 (Name and address of agent for service) Registrant's telephone number, including area code: (612) 671-1947 Date of fiscal year end: July 31 Date of reporting period: July 31, 2010 ITEM 1. REPORTS TO STOCKHOLDERS. Annual Report (COLUMBIA MANAGEMENT LOGO) COLUMBIA SHORT-TERM CASH FUND (FORMERLY KNOWN AS RIVERSOURCE SHORT-TERM CASH FUND) - -------------------------------------------------------------------------------- ANNUAL REPORT FOR THE PERIOD ENDED JULY 31, 2010 COLUMBIA SHORT-TERM CASH FUND SEEKS TO PROVIDE SHAREHOLDERS WITH MAXIMUM CURRENT INCOME CONSISTENT WITH LIQUIDITY AND STABILITY OF PRINCIPAL. Shares of the Fund are issued solely in private placement transactions that do not involve any public offering within the meaning of Section 4(2) of the Securities Act of 1933, as amended (the 1933 Act). Investments in the Fund may be made only by investment companies, common or commingled trust funds or similar organizations or persons that are accredited investors within the meaning of the 1933 Act. NOT FDIC INSURED - NO BANK GUARANTEE - MAY LOSE VALUE TABLE OF CONTENTS -------------------------------------------------------------- <Table> Your Fund at a Glance.............. 3 Fund Expenses Example.............. 4 Portfolio of Investments........... 5 Statement of Assets and Liabilities...................... 18 Statement of Operations............ 19 Statements of Changes in Net Assets........................... 20 Financial Highlights............... 21 Notes to Financial Statements...... 22 Report of Independent Registered Public Accounting Firm........... 29 Federal Income Tax Information..... 31 Board Members and Officers......... 32 Approval of Investment Management Services Agreement............... 38 Proxy Voting....................... 41 </Table> Note: Effective September 27, 2010, the Fund has been renamed. While this report covers the fiscal period ended July 31, 2010, which is prior to the name change, the Fund's new name has been reflected throughout. SEE THE FUND'S PROSPECTUS FOR RISKS ASSOCIATED WITH INVESTING IN THE FUND. - -------------------------------------------------------------------------------- 2 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT YOUR FUND AT A GLANCE ---------------------------------------------------------- PORTFOLIO BREAKDOWN(1) (at July 31, 2010) - --------------------------------------------------------------------- <Table> <Caption> Certificates of Deposit 6.2% - ------------------------------------------------ Commercial Paper 31.7% - ------------------------------------------------ Repurchase Agreements 7.7% - ------------------------------------------------ U.S. Government Agencies 36.3% - ------------------------------------------------ U.S. Government-Insured Debt(2) 18.1% - ------------------------------------------------ </Table> (1) Percentages indicated are based upon total investments (excluding Investments of Cash Collateral Received for Securities on Loan). The Fund's composition is subject to change. (2) Funding for this debt is provided by the Federal Financing Bank, which is funded by the U.S. Department of the Treasury. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 3 FUND EXPENSES EXAMPLE ---------------------------------------------------------- (UNAUDITED) As a shareholder of the Fund, you incur ongoing costs which may include custodian fees and other nonadvisory expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the six months ended July 31, 2010. ACTUAL EXPENSES The first line of the table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading titled "Expenses paid during the period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line of the table provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. <Table> <Caption> BEGINNING ENDING EXPENSES ACCOUNT VALUE ACCOUNT VALUE PAID DURING ANNUALIZED FEB. 1, 2010 JULY 31, 2010 THE PERIOD(a) EXPENSE RATIO - ------------------------------------------------------------------------------------------ Actual(b) $1,000 $1,001.20 $0.00(c) 0.00%(c) - ------------------------------------------------------------------------------------------ Hypothetical (5% return before expenses) $1,000 $1,024.93 $0.00(c) 0.00%(c) - ------------------------------------------------------------------------------------------ </Table> (a) Expenses are equal to the Fund's annualized expense ratio as indicated above, multiplied by the average account value over the period, multiplied by 182/365 (to reflect the one-half year period). (b) Based on the actual return of 0.12% for the six months ended July 31, 2010. (c) Rounds to less than $0.01. - -------------------------------------------------------------------------------- 4 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT PORTFOLIO OF INVESTMENTS ------------------------------------------------------- JULY 31, 2010 (Percentages represent value of investments compared to net assets) INVESTMENTS IN SECURITIES <Table> <Caption> U.S. GOVERNMENT AGENCIES (36.3%) AMOUNT EFFECTIVE PAYABLE AT ISSUER YIELD MATURITY VALUE(a) Federal Home Loan Bank Discount Notes 08-04-10 0.150% $101,800,000(e) $101,797,964 08-06-10 0.150 50,000,000(e) 49,998,542 08-13-10 0.120 35,000,000(e) 34,998,357 06-21-11 0.750 30,000,000(e) 30,000,000 Federal Home Loan Mortgage Corp. Discount Notes 08-04-10 0.150 67,000,000 66,998,660 08-10-10 0.380 35,000,000(b) 35,000,000 Federal National Mortgage Association Discount Notes 08-02-10 0.070 100,000,000(e) 99,999,444 U.S. Treasury Bills 08-05-10 0.070 40,000,000(e) 39,999,556 08-19-10 0.100 25,000,000(e) 24,998,654 08-26-10 0.150 150,000,000(e) 149,983,678 09-09-10 0.140 200,000,000(e) 199,967,778 09-16-10 0.150 100,000,000(e) 99,979,633 09-23-10 0.160 150,000,000(e) 149,964,563 - ------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AGENCIES (Cost: $1,083,686,829) $1,083,686,829 - ------------------------------------------------------------------------------------- <Caption> U.S. GOVERNMENT-INSURED DEBT (18.1%) AMOUNT EFFECTIVE PAYABLE AT ISSUER YIELD MATURITY VALUE(a) Straight-A Funding LLC U.S. Treasury Government Guaranty(d) 08-09-10 0.370% $50,000,000(c) $49,995,000 08-10-10 0.310 47,500,000(c) 47,495,514 08-11-10 0.290 25,000,000(c) 24,997,632 08-18-10 0.230 25,000,000(c) 24,997,000 08-20-10 0.230 64,026,000(c) 64,017,463 09-02-10 0.410 60,175,000(c) 60,151,833 09-08-10 0.410 50,000,000(c) 49,977,792 09-21-10 0.310 30,100,000(c) 30,086,522 09-21-10 0.340 50,000,000(c) 49,975,444 09-22-10 0.280 26,262,000 26,251,174 09-22-10 0.320 30,000,000(c) 29,985,867 10-05-10 0.340 26,000,000(c) 25,983,793 10-06-10 0.330 30,000,000(c) 29,981,575 10-12-10 0.350 24,645,000(c) 24,627,509 - ------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT-INSURED DEBT (Cost: $538,524,118) $538,524,118 - ------------------------------------------------------------------------------------- <Caption> CERTIFICATES OF DEPOSIT (6.2%) AMOUNT EFFECTIVE PAYABLE AT ISSUER YIELD MATURITY VALUE(a) Citibank NA 08-02-10 0.210% $91,900,000 $91,900,000 Royal Bank of Canada 08-02-10 0.180 92,000,000 92,000,000 - ------------------------------------------------------------------------------------- TOTAL CERTIFICATES OF DEPOSIT (Cost: $183,900,000) $183,900,000 - ------------------------------------------------------------------------------------- <Caption> COMMERCIAL PAPER (31.8%) AMOUNT EFFECTIVE PAYABLE AT ISSUER YIELD MATURITY VALUE(a) ASSET-BACKED (19.8%) Amsterdam Funding Corp. 08-02-10 0.300% $50,000,000 $49,998,750 Argento Variable Funding Co. LLC 08-02-10 0.210 30,000,000 29,999,483 Bryant Park Funding LLC 08-09-10 0.280 32,677,000 32,674,468 08-16-10 0.290 50,000,000 49,993,333 Falcon Asset Securitization Co. LLC 08-11-10 0.260 50,000,000 49,995,722 </Table> See accompanying Notes to Portfolio of Investments. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 5 PORTFOLIO OF INVESTMENTS (continued) ------------------------------------------- <Table> <Caption> COMMERCIAL PAPER (CONTINUED) AMOUNT EFFECTIVE PAYABLE AT ISSUER YIELD MATURITY VALUE(a) ASSET-BACKED (CONT.) FCAR Owner Trust Series I 08-16-10 0.290% $45,000,000 $44,994,000 08-17-10 0.340 30,000,000 29,995,042 08-18-10 0.310 25,000,000 24,996,000 Regency Markets No. 1 LLC 08-12-10 0.330 49,409,000(c) 49,403,236 Salisbury Receivables Co. LLC 08-03-10 0.320 50,000,000(c) 49,998,250 08-30-10 0.260 45,000,000(c) 44,989,875 Sheffield Receivables Corp. 08-16-10 0.380 45,000,000(c) 44,992,000 Thunder Bay Funding LLC 08-16-10 0.270 37,142,000 37,137,378 Windmill Funding Corp. 08-23-10 0.460 50,000,000 49,984,985 --------------- Total 589,152,522 - ------------------------------------------------------------------------------------- BANKING (6.7%) Barclays US Funding LLC 09-14-10 0.360 50,000,000 49,977,500 HSBC USA Inc. 08-13-10 0.240 50,000,000 49,995,486 08-27-10 0.230 50,000,000 49,991,000 Westpac Banking Corp. 08-30-10 0.300 50,000,000 49,987,083 --------------- Total 199,951,069 - ------------------------------------------------------------------------------------- LIFE INSURANCE (5.3%) MetLife Short Term Funding LLC 08-12-10 0.330 45,000,000 44,994,749 08-20-10 0.320 34,000,000(c) 33,993,767 09-10-10 0.350 20,000,000 19,992,028 New York Life Capital Corp. 09-07-10 0.310 44,133,000(c) 44,118,559 09-13-10 0.300 15,000,000(c) 14,994,500 --------------- Total 158,093,603 - ------------------------------------------------------------------------------------- TOTAL COMMERCIAL PAPER (Cost: $947,197,194) $947,197,194 - ------------------------------------------------------------------------------------- <Caption> REPURCHASE AGREEMENTS (7.7%) EFFECTIVE PRINCIPAL ISSUER YIELD AMOUNT VALUE(a) Barclays Bank PLC dated 07-30-10, matures 08-02-10, repurchase price $140,002,450 (collateralized by: U.S. Treasury total market value $140,000,041) 2.375% $140,000,000 $140,000,000 Morgan Stanley & Co. dated 07-30-10, matures 08-02-10, repurchase price $90,001,425 (collateralized by: U.S. Treasury Inflation-Indexed Bonds total market value $90,000,110) 2.375 90,000,000 90,000,000 - ------------------------------------------------------------------------------------- TOTAL REPURCHASE AGREEMENTS (Cost: $230,000,000) $230,000,000 - ------------------------------------------------------------------------------------- <Caption> INVESTMENTS OF CASH COLLATERAL RECEIVED FOR SECURITIES ON LOAN (26.1%) AMOUNT EFFECTIVE PAYABLE AT ISSUER YIELD MATURITY VALUE(a) ASSET-BACKED COMMERCIAL PAPER (5.2%) Amsterdam Funding Corp. 08-16-10 0.450% $16,988,100 $16,988,100 Antalis US Funding Corp. 08-17-10 0.380 10,856,676 10,856,676 10-12-10 0.571 4,993,033 4,993,033 Argento Variable Funding Company LLC 08-12-10 0.370 9,996,917 9,996,917 Cancara Asset Securitisation LLC 08-12-10 0.330 999,734 999,734 Grampian Funding LLC 08-09-10 0.370 4,998,304 4,998,304 LMA Americas LLC 08-23-10 0.360 8,997,480 8,997,480 Regency Markets No. 1 LLC 08-09-10 0.360 9,996,700 9,996,700 Rheingold Securitization 10-15-10 0.621 14,979,075 14,979,075 10-25-10 0.621 5,188,855 5,188,855 Royal Park Investments Funding Corp. 09-22-10 0.601 14,978,500 14,978,500 10-06-10 0.551 1,997,250 1,997,250 Tempo Financial Holdings Corp. 08-04-10 0.350 9,999,125 9,999,125 </Table> See accompanying Notes to Portfolio of Investments. - -------------------------------------------------------------------------------- 6 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- <Table> <Caption> INVESTMENTS OF CASH COLLATERAL RECEIVED FOR SECURITIES ON LOAN (CONTINUED) AMOUNT EFFECTIVE PAYABLE AT ISSUER YIELD MATURITY VALUE(a) ASSET-BACKED COMMERCIAL PAPER (CONT.) Thames Asset Global Securities 09-20-10 0.551% $19,971,278 $19,971,278 Versailles Commercial Paper LLC 09-17-10 0.551 9,990,375 9,990,375 Windmill Funding Corp. 09-20-10 0.551 9,985,639 9,985,639 --------------- Total 154,917,041 - ------------------------------------------------------------------------------------- CERTIFICATES OF DEPOSIT (12.3%) Banco Popular Caisse d'Epargne 09-24-10 0.670 9,982,907 9,982,907 Bank of Tokyo Securities 10-14-10 0.550 14,978,946 14,978,946 Banque et Caisse d'Epargne de l'Etat 08-16-10 0.400 4,998,223 4,998,223 Barclays Bank PLC 08-31-10 0.421 20,000,000 20,000,000 BNP Paribas 10-15-10 0.411 16,000,000 16,000,000 BRED Banque Populaire 09-08-10 0.600 9,989,677 9,989,677 Credit Agricole 10-12-10 0.413 21,000,000 21,000,000 Credit Industrial et Commercial 08-02-10 0.460 4,000,000 4,000,000 08-18-10 0.680 12,500,000 12,500,000 Deutsche Bank AG 12-06-10 0.527 15,000,000 15,000,000 Dexia Credit Local 08-06-10 0.650 9,000,077 9,000,077 DZ Bank AG 08-09-10 0.470 15,000,000 15,000,000 KBC Bank NV 08-06-10 0.450 25,000,000 25,000,000 Landesbank Hessen Thuringen 08-10-10 0.440 9,995,968 9,995,968 Lloyds Bank PLC 10-14-10 0.520 5,500,000 5,500,000 Macquarie Bank Ltd. 08-03-10 0.400 14,998,833 14,998,833 N.V. Bank Nederlandse Gemeenten 09-13-10 0.380 10,000,000 10,000,000 Natixis 09-29-10 0.490 9,991,568 9,991,568 Norinchukin Bank 08-25-10 0.550 10,000,000 10,000,000 09-21-10 0.560 20,000,264 20,000,264 09-28-10 0.570 5,000,000 5,000,000 10-12-10 0.575 5,000,066 5,000,066 NyKredit Bank 08-06-10 0.460 10,000,000 10,000,000 Overseas Chinese Banking Corp. 08-06-10 0.420 1,500,000 1,500,000 09-21-10 0.590 10,000,000 10,000,000 09-29-10 0.590 10,000,000 10,000,000 Rabobank Group 10-27-10 0.377 7,000,000 7,000,000 11-03-10 0.407 15,000,000 15,000,000 Royal Bank of Scotland 08-09-10 0.320 5,001,072 5,001,072 Societe Generale 09-01-10 0.655 20,000,000 20,000,000 Union Bank of Switzerland 10-18-10 0.455 6,000,000 6,000,000 Westpac Banking Corp. 11-04-10 0.387 15,000,000 15,000,000 --------------- Total 367,437,601 - ------------------------------------------------------------------------------------- COMMERCIAL PAPER (1.2%) State Development Bank of NorthRhine-Westphalia 10-15-10 0.491 9,987,342 9,987,342 Toyota Motor Credit Corp. 08-23-10 0.531 24,964,299 24,964,299 --------------- Total 34,951,641 - ------------------------------------------------------------------------------------- </Table> See accompanying Notes to Portfolio of Investments. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 7 PORTFOLIO OF INVESTMENTS (continued) ------------------------------------------- <Table> <Caption> INVESTMENTS OF CASH COLLATERAL RECEIVED FOR SECURITIES ON LOAN (CONTINUED) EFFECTIVE PRINCIPAL ISSUER YIELD AMOUNT VALUE(a) REPURCHASE AGREEMENTS (7.4%)(f) Barclays Capital, Inc. dated 03-22-10, matures 08-30-10, repurchase price $5,001,981 0.460% $5,000,000 $5,000,000 Barclays Capital, Inc. dated 07-30-10, matures 08-02-10, repurchase price $5,000,129 0.310 5,000,000 5,000,000 Cantor Fitzgerald & Co. dated 07-30-10, matures 08-02-10, repurchase price $54,001,335 0.230 54,000,300 54,000,300 Citigroup Global Markets, Inc. dated 07-30-10, matures 08-02-10, repurchase price $22,500,413 0.220 22,500,000 22,500,000 Mizuho Securities USA, Inc. dated 07-30-10, matures 08-02-10, repurchase price $5,000,100 0.240 5,000,000 5,000,000 Morgan Stanley dated 01-21-10, matures 08-30-10, repurchase price $25,009,903 0.460 25,000,000 25,000,000 Morgan Stanley dated 02-22-10, matures 08-23-10, repurchase price $20,007,067 0.530 20,000,000 20,000,000 Morgan Stanley dated 02-23-10, matures 08-23-10, repurchase price $15,005,300 0.530 15,000,000 15,000,000 Pershing LLC dated 07-30-10, matures 08-02-10, repurchase price $45,001,163 0.310 45,000,000 45,000,000 RBS Securities, Inc. dated 07-30-10, matures 08-02-10, repurchase price $4,000,120 0.360 4,000,000 4,000,000 RBS Securities, Inc. dated 04-01-10, matures 09-03-10, repurchase price $15,006,708 0.460 15,000,000 15,000,000 UBS Securities LLC dated 07-30-10, matures 08-02-10, repurchase price $4,375,094 0.210 4,375,017 4,375,017 --------------- Total 219,875,317 - ------------------------------------------------------------------------------------- TOTAL INVESTMENTS OF CASH COLLATERAL RECEIVED FOR SECURITIES ON LOAN (Cost: $777,181,600) $777,181,600 - ------------------------------------------------------------------------------------- TOTAL INVESTMENTS IN SECURITIES (Cost: $3,760,489,741)(g) $3,760,489,741 ===================================================================================== </Table> NOTES TO PORTFOLIO OF INVESTMENTS (a) Securities are valued by using policies described in Note 2 to the financial statements. (b) Interest rate varies either based on a predetermined schedule or to reflect current market conditions; rate shown is the effective rate on July 31, 2010. The maturity date disclosed represents the final maturity. For purposes of Rule 2a-7, maturity is the later of the next put or interest rate reset date. - -------------------------------------------------------------------------------- 8 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- NOTES TO PORTFOLIO OF INVESTMENTS (CONTINUED) (c) Represents a security sold within terms of a private placement memorandum, exempt from registration under Section 4(2) of the Securities Act of 1933, as amended, and may be sold only to dealers in that program or other "accredited investors." This security has been determined to be liquid under guidelines established by the Fund's Board of Directors. This security may be resold in transactions exempt from registration, normally to qualified institutional buyers. At July 31, 2010, the value of these securities amounted to $794,763,131 or 26.65% of net assets. (d) Funding for this debt is provided by the Federal Financing Bank, which is funded by the U.S. Department of the Treasury. (e) At July 31, 2010, security was partially or fully on loan. See Note 4 to the financial statements. (f) The table below represents securities received as collateral for repurchase agreements. This collateral, which is generally high quality short-term obligations, is deposited with the Fund's custodian and, pursuant to the terms of the repurchase agreement, must have an aggregate market value greater than or equal to the repurchase price plus accrued interest at all times. The market value of securities held as collateral for repurchase agreements is monitored on a daily basis to ensure the existence of the proper level of collateral. <Table> <Caption> BARCLAYS CAPITAL, INC. (0.460%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Banc of America Commercial Mortgage Inc $645,360 Bear Stearns Commercial Mortgage Securities 352,577 Credit Suisse Mortgage Capital Certificates 540,777 Granite Master Issuer PLC 1,573,366 JP Morgan Chase Commercial Mortgage Securities Corp 269,551 LB Commercial Conduit Mortgage Trust 421,173 Merrill Lynch Mortgage Trust 264,792 Paragon Mortgages PLC 812,939 Wachovia Bank Commercial Mortgage Trust 369,465 - ----------------------------------------------------------- Total market value of collateral securities $5,250,000 - ----------------------------------------------------------- <Caption> BARCLAYS CAPITAL, INC. (0.310%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Rabobank Nederland $5,250,000 - ----------------------------------------------------------- Total market value of collateral securities $5,250,000 - ----------------------------------------------------------- <Caption> CANTOR FITZGERALD & CO. (0.230%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Fannie Mae Discount Notes $1,224 Fannie Mae Grantor Trust 11,107 Fannie Mae Interest Strip 610,740 </Table> - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 9 PORTFOLIO OF INVESTMENTS (continued) ------------------------------------------- NOTES TO PORTFOLIO OF INVESTMENTS (CONTINUED) <Table> <Caption> CANTOR FITZGERALD & CO. (0.230%) (CONTINUED) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Fannie Mae Pool $5,701,362 Fannie Mae Principal Strip 51,970 Fannie Mae REMICS 4,529,796 Fannie Mae Whole Loan 726 Federal Farm Credit Bank 1,165,953 Federal Home Loan Bank Discount Notes 1,198,927 Federal Home Loan Banks 8,674,501 Federal Home Loan Mortgage Corp 744,374 Federal National Mortgage Association 1,976,016 FHLMC Structured Pass Through Securities 1,686,410 Freddie Mac Coupon Strips 3,932 Freddie Mac Discount Notes 287,886 Freddie Mac Non Gold Pool 2,505,720 Freddie Mac Reference REMIC 43,420 Freddie Mac REMICS 2,720,345 Freddie Mac Strips 364,596 Ginnie Mae I Pool 3,616,076 Ginnie Mae II Pool 3,198,370 Government National Mortgage Association 1,075,538 United States Treasury Bill 11,600,832 United States Treasury Inflation Indexed Bonds 462,551 United States Treasury Strip Coupon 2,698,026 United States Treasury Strip Principal 149,909 - ----------------------------------------------------------- Total market value of collateral securities $55,080,307 - ----------------------------------------------------------- <Caption> CITIGROUP GLOBAL MARKETS, INC. (0.220%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Fannie Mae REMICS $8,081,287 Freddie Mac Reference REMIC 776,537 Freddie Mac REMICS 10,894,571 Government National Mortgage Association 3,197,605 - ----------------------------------------------------------- Total market value of collateral securities $22,950,000 - ----------------------------------------------------------- <Caption> MIZUHO SECURITIES USA, INC. (0.240%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Fannie Mae Pool $1,817,879 Fannie Mae REMICS 1,256,032 Freddie Mac Gold Pool 661,756 Freddie Mac Non Gold Pool 27,902 Freddie Mac REMICS 836,003 </Table> - -------------------------------------------------------------------------------- 10 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- NOTES TO PORTFOLIO OF INVESTMENTS (CONTINUED) <Table> <Caption> MIZUHO SECURITIES USA, INC. (0.240%) (CONTINUED) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Ginnie Mae I Pool $499,964 Ginnie Mae II Pool 464 - ----------------------------------------------------------- Total market value of collateral securities $5,100,000 - ----------------------------------------------------------- <Caption> MORGAN STANLEY (0.460%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Amstel Funding Corp $4,410,181 Argento Variable Fund 3,628,824 Atlantis One Funding Corp 2,940,177 Landesbank Hsn-Thurny 2,940,494 LMA LMA Americas 3,388,022 Romulus Funding Corp 3,767,279 Scaldis Capital Ltd/LLC 4,098,633 Shell International Finance B.V 1,076,390 - ----------------------------------------------------------- Total market value of collateral securities $26,250,000 - ----------------------------------------------------------- <Caption> MORGAN STANLEY (0.530%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Banc of America Large Loan Inc $404,124 Bear Stearns Commercial Mortgage Securities 93,414 Citigroup Commercial Mortgage Trust 651,599 Citigroup/Deutsche Bank Commercial Mortgage Trust 725,118 Commercial Mortgage Pass Through Certificates 819,204 Credit Suisse Mortgage Capital Certificates 742,908 Credit Suisse/Morgan Stanley Commercial Mortgage Certificate 172,951 Federal National Mortgage Association 390,966 GE Capital Commercial Mortgage Corp 21,706 Ginnie Mae I Pool 1,026,234 Ginnie Mae II Pool 4,153,793 Greenwich Capital Commercial Funding Corp 37,989 GS Mortgage Securities Corp II 1,544,183 JP Morgan Chase Commercial Mortgage Securities Corp 751,057 LB-UBS Commercial Mortgage Trust 1,295,484 Merrill Lynch Floating Trust 219,198 Merrill Lynch Mortgage Trust 593,156 Morgan Stanley Capital I 1,090,757 Morgan Stanley Dean Witter Capital I 3,307 United States Treasury Note/Bond 2,221,391 Wachovia Bank Commercial Mortgage Trust 3,812,273 - ----------------------------------------------------------- Total market value of collateral securities $20,770,812 - ----------------------------------------------------------- </Table> - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 11 PORTFOLIO OF INVESTMENTS (continued) ------------------------------------------- NOTES TO PORTFOLIO OF INVESTMENTS (CONTINUED) <Table> <Caption> MORGAN STANLEY (0.530%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Banc of America Large Loan Inc $303,093 Bear Stearns Commercial Mortgage Securities 70,061 Citigroup Commercial Mortgage Trust 488,699 Citigroup/Deutsche Bank Commercial Mortgage Trust 543,839 Commercial Mortgage Pass Through Certificates 614,403 Credit Suisse Mortgage Capital Certificates 557,181 Credit Suisse/Morgan Stanley Commercial Mortgage Certificate 129,713 Federal National Mortgage Association 293,225 GE Capital Commercial Mortgage Corp 16,279 Ginnie Mae I Pool 769,676 Ginnie Mae II Pool 3,115,345 Greenwich Capital Commercial Funding Corp 28,492 GS Mortgage Securities Corp II 1,158,137 JP Morgan Chase Commercial Mortgage Securities Corp 563,292 LB-UBS Commercial Mortgage Trust 971,613 Merrill Lynch Floating Trust 164,398 Merrill Lynch Mortgage Trust 444,867 Morgan Stanley Capital I 818,068 Morgan Stanley Dean Witter Capital I 2,480 United States Treasury Note/Bond 1,666,043 Wachovia Bank Commercial Mortgage Trust 2,859,205 - ----------------------------------------------------------- Total market value of collateral securities $15,578,109 - ----------------------------------------------------------- <Caption> PERSHING LLC (0.310%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Fannie Mae Benchmark REMIC $116,820 Fannie Mae Pool 18,536,391 Fannie Mae REMICS 1,750,710 Federal Farm Credit Bank 157,797 Federal Home Loan Banks 478,487 Federal Home Loan Mortgage Corp 31,096 Federal National Mortgage Association 3,043 Freddie Mac Gold Pool 4,985,140 Freddie Mac Non Gold Pool 556,976 Freddie Mac REMICS 1,616,092 Ginnie Mae I Pool 1,009,778 Ginnie Mae II Pool 2,030,640 Government National Mortgage Association 526,057 United States Treasury Inflation Indexed Bonds 924,907 United States Treasury Note/Bond 9,575,322 </Table> - -------------------------------------------------------------------------------- 12 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- NOTES TO PORTFOLIO OF INVESTMENTS (CONTINUED) <Table> <Caption> PERSHING LLC (0.310%) (CONTINUED) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- United States Treasury Strip Coupon $1,312,809 United States Treasury Strip Principal 2,287,935 - ----------------------------------------------------------- Total market value of collateral securities $45,900,000 - ----------------------------------------------------------- <Caption> RBS SECURITIES, INC. (0.360%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Accredited Mortgage Loan Trust $45,895 American Express Credit Account Master Trust 20,525 American Express Issuance Trust 3,201 AmeriCredit Automobile Receivables Trust 1,260 Ameriquest Mortgage Securities Inc 308,401 Avery Point CLO Ltd 15,263 BA Credit Card Trust 180,148 Banc of America Commercial Mortgage Inc 92,200 Bank of America Auto Trust 269,800 Bear Stearns Asset Backed Securities Trust 36,217 Capital Auto Receivables Asset Trust 2,428 Capital One Multi-Asset Execution Trust 48,112 Capital One Prime Auto Receivables Trust 18,479 CarMax Auto Owner Trust 22,517 Chase Issuance Trust 1,435 Citibank Credit Card Issuance Trust 158,450 Citigroup Commercial Mortgage Trust 64,712 Citigroup/Deutsche Bank Commercial Mortgage Trust 583 CNH Equipment Trust 4,508 Commercial Mortgage Pass Through Certificates 20,999 Countrywide Asset-Backed Certificates 178,780 Credit-Based Asset Servicing and Securitization LLC 150,040 First Franklin Mortgage Loan Asset Backed Certificates 157,910 Ford Credit Auto Owner Trust 3,037 Franklin Auto Trust 2,156 Goal Capital Funding Trust 24,992 Goldman Sachs Specialty Lending CLO-I Ltd 134,980 Greenwich Capital Commercial Funding Corp 298,738 GS Mortgage Securities Corp II 411,883 Household Automotive Trust 1,312 John Deere Owner Trust 2,424 JP Morgan Chase Commercial Mortgage Securities Corp 7,811 Keycorp Student Loan Trust 28,829 Marriott Vacation Club Owner Trust 26,657 Massachusetts Educational Financing Authority 64,853 Morgan Stanley Capital I 6,118 Nelnet Student Loan Trust 480,058 </Table> - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 13 PORTFOLIO OF INVESTMENTS (continued) ------------------------------------------- NOTES TO PORTFOLIO OF INVESTMENTS (CONTINUED) <Table> <Caption> RBS SECURITIES, INC. (0.360%) (CONTINUED) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Nissan Auto Lease Trust $11,232 Nissan Auto Receivables Owner Trust 11,463 Nordstrom Private Label Credit Card Master Note Trust 15,490 Peco Energy Transition Trust 4,968 SLM Student Loan Trust 202,944 SMS Student Loan Trust 3,258 Terwin Mortgage Trust 102,709 Volkswagen Auto Lease Trust 331,212 Wachovia Bank Commercial Mortgage Trust 17,040 Wachovia Student Loan Trust 37,735 World Omni Auto Receivables Trust 166,306 - ----------------------------------------------------------- Total market value of collateral securities $4,200,068 - ----------------------------------------------------------- <Caption> RBS SECURITIES, INC. (0.460%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- 280 Funding Corp $642,146 AH Mortgage Advance Trust 232,098 American Home Mortgage Investment Trust 347,642 Banc of America Commercial Mortgage Inc 459,839 Banc of America Large Loan Inc 909,415 Bear Stearns Commercial Mortgage Securities 326,822 Bella Vista Mortgage Trust 16,002 CC Mortgage Funding Corp 97,191 Commercial Mortgage Pass Through Certificates 17,252 Countrywide Home Loan Mortgage Pass Through Trust 42,193 Credit Suisse First Boston Mortgage Securities Corp 219,760 Credit Suisse Mortgage Capital Certificates 303,413 First Horizon Alternative Mortgage Securities 18,200 First Republic Mortgage Loan Trust 351,275 Ford Credit Floorplan Master Owner Trust 619,650 GE Dealer Floorplan Master Note Trust 60,093 Greenwich Capital Commercial Funding Corp 438,418 GS Mortgage Securities Corp II 656,253 Harborview Mortgage Loan Trust 66,120 Harley-Davidson Motorcycle Trust 40,874 JP Morgan Chase Commercial Mortgage Securities Corp 1,400,412 LB-UBS Commercial Mortgage Trust 1,308,920 Leafs CDO I Ltd 348,703 MLCC Mortgage Investors Inc 1,769 Morgan Stanley Capital I 647,343 MortgageIT Trust 30,776 Oak Hill Credit Partners 33,223 </Table> - -------------------------------------------------------------------------------- 14 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- NOTES TO PORTFOLIO OF INVESTMENTS (CONTINUED) <Table> <Caption> RBS SECURITIES, INC. (0.460%) (CONTINUED) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Sequoia Mortgage Trust $2,075 Wachovia Bank Commercial Mortgage Trust 5,526,892 WaMu Mortgage Pass Through Certificates 559,853 Wells Fargo Mortgage Backed Securities Trust 25,409 - ----------------------------------------------------------- Total market value of collateral securities $15,750,031 - ----------------------------------------------------------- <Caption> UBS SECURITIES LLC (0.210%) SECURITY DESCRIPTION VALUE(a) - ----------------------------------------------------------- Fannie Mae Interest Strip $994,273 Fannie Mae Principal Strip 189,921 Federal Farm Credit Bank 526,840 Federal Home Loan Mortgage Corp 1,866,772 Freddie Mac Strips 884,723 - ----------------------------------------------------------- Total market value of collateral securities $4,462,529 - ----------------------------------------------------------- </Table> (g) Also represents the cost of securities for federal income tax purposes at July 31, 2010. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 15 PORTFOLIO OF INVESTMENTS (continued) ------------------------------------------- FAIR VALUE MEASUREMENTS Generally accepted accounting principles (GAAP) require disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund's assumptions about the information market participants would use in pricing an investment. An investment's level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset or liability's fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market. Fair value inputs are summarized in the three broad levels listed below: - Level 1 -- Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments. - Level 2 -- Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.). - Level 3 -- Valuations based on significant unobservable inputs (including the Fund's own assumptions and judgment in determining the fair value of investments). Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Fund Administrator, along with any other relevant factors in the calculation of an investment's fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy. Short-term securities are valued using amortized cost, as permitted under Rule 2a-7 of the Investment Company Act of 1940, as amended. Generally, amortized cost approximates the current fair value of these securities, but because the value is not obtained from a quoted price in an active market, such securities are reflected as Level 2. Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as - -------------------------------------------------------------------------------- 16 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- FAIR VALUE MEASUREMENTS (CONTINUED) Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models rely on one or more significant unobservable inputs and/or significant assumptions by the Fund Administrator. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data. The following table is a summary of the inputs used to value the Fund's investments as of July 31, 2010: <Table> <Caption> FAIR VALUE AT JULY 31, 2010 -------------------------------------------------------------------- LEVEL 1 LEVEL 2 QUOTED PRICES OTHER LEVEL 3 IN ACTIVE SIGNIFICANT SIGNIFICANT MARKETS FOR OBSERVABLE UNOBSERVABLE DESCRIPTION(a) IDENTICAL ASSETS INPUTS(b) INPUTS TOTAL - ----------------------------------------------------------------------------------------------- Short-Term Securities U.S. Government Agencies $-- $1,083,686,829 $-- $1,083,686,829 U.S. Government- Insured Debt -- 538,524,118 -- 538,524,118 Certificates of Deposit -- 183,900,000 -- 183,900,000 Commercial Paper -- 947,197,194 -- 947,197,194 Repurchase Agreements -- 230,000,000 -- 230,000,000 - ----------------------------------------------------------------------------------------------- Total Short-Term Securities -- 2,983,308,141 -- 2,983,308,141 - ----------------------------------------------------------------------------------------------- Other Investments of Cash Collateral Received for Securities on Loan -- 777,181,600 -- 777,181,600 - ----------------------------------------------------------------------------------------------- Total Other -- 777,181,600 -- 777,181,600 - ----------------------------------------------------------------------------------------------- Total $-- $3,760,489,741 $-- $3,760,489,741 - ----------------------------------------------------------------------------------------------- </Table> (a) See the Portfolio of Investments for all investment classifications not indicated in the table. (b) There were no significant transfers between Levels 1 and 2 during the period. HOW TO FIND INFORMATION ABOUT THE FUND'S QUARTERLY PORTFOLIO HOLDINGS (i) The Fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (Commission) for the first and third quarters of each fiscal year on Form N-Q; (ii) The Fund's Forms N-Q are available on the Commission's website at http://www.sec.gov; (iii)The Fund's Forms N-Q may be reviewed and copied at the Commission's Public Reference Room in Washington, DC (information on the operations of the Public Reference Room may be obtained by calling 800.SEC.0330); and (iv) The Fund's complete schedule of portfolio holdings, as filed on Form N-Q, can be obtained without charge, upon request, by calling 800.345.6611. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 17 STATEMENT OF ASSETS AND LIABILITIES -------------------------------------------- JULY 31, 2010 <Table> <Caption> ASSETS Investments, at value* Securities (identified cost $2,753,308,141) $2,753,308,141 Repurchase agreements (identified cost $230,000,000) 230,000,000 Investments of cash collateral received for securities on loan Short-term securities (identified cost $557,306,283) 557,306,283 Repurchase agreements (identified cost $219,875,317) 219,875,317 - --------------------------------------------------------------------------------- Total investments (identified cost $3,760,489,741) 3,760,489,741 Cash 86,925 Accrued interest receivable 92,590 - --------------------------------------------------------------------------------- Total assets 3,760,669,256 - --------------------------------------------------------------------------------- LIABILITIES Dividends payable to shareholders 775,512 Payable upon return of securities loaned 777,181,600 Other accrued expenses 46,406 - --------------------------------------------------------------------------------- Total liabilities 778,003,518 - --------------------------------------------------------------------------------- Net assets applicable to outstanding capital stock $2,982,665,738 - --------------------------------------------------------------------------------- REPRESENTED BY Capital stock -- $.01 par value $ 29,826,804 Additional paid-in capital 2,952,853,636 Undistributed net investment income 2,611 Accumulated net realized gain (loss) (17,313) - --------------------------------------------------------------------------------- Total -- representing net assets applicable to outstanding capital stock $2,982,665,738 - --------------------------------------------------------------------------------- Shares outstanding 2,982,680,440 - --------------------------------------------------------------------------------- Net asset value per share of outstanding capital stock $ 1.00 - --------------------------------------------------------------------------------- *Value of securities on loan $ 829,579,510 - --------------------------------------------------------------------------------- </Table> The accompanying Notes to Financial Statements are an integral part of this statement. - -------------------------------------------------------------------------------- 18 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT STATEMENT OF OPERATIONS -------------------------------------------------------- <Table> <Caption> YEAR ENDED JULY 31, 2010 INVESTMENT INCOME Income: Interest $6,035,167 Income from securities lending -- net 806,986 - ----------------------------------------------------------------------------- Total income 6,842,153 - ----------------------------------------------------------------------------- Expenses: Custodian fees 44,758 Shareholder reports and communications 11,058 Professional fees 28,135 Professional organization membership dues 6,427 Commitment fees for bank credit facility 23,234 - ----------------------------------------------------------------------------- Total expenses 113,612 - ----------------------------------------------------------------------------- Investment income (loss) -- net 6,728,541 - ----------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) -- NET Net realized gain (loss) on security transactions 4,822 - ----------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from operations $6,733,363 - ----------------------------------------------------------------------------- </Table> The accompanying Notes to Financial Statements are an integral part of this statement. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 19 STATEMENTS OF CHANGES IN NET ASSETS -------------------------------------------- <Table> <Caption> YEAR ENDED JULY 31, 2010 2009 OPERATIONS AND DISTRIBUTIONS Investment income (loss) -- net $ 6,728,541 $ 26,871,635 Net realized gain (loss) on security transactions 4,822 (39,140,572) Increase from payments by affiliate (Note 6) -- 39,122,218 - ------------------------------------------------------------------------------------------------ Net increase (decrease) in net assets resulting from operations 6,733,363 26,853,281 - ------------------------------------------------------------------------------------------------ Distributions to shareholders from: Net investment income (6,726,386) (26,871,179) - ------------------------------------------------------------------------------------------------ CAPITAL SHARE TRANSACTIONS AT CONSTANT $1 NET ASSET VALUE Proceeds from sales 25,537,736,980 16,234,642,143 Reinvestment of distributions at net asset value 6,588,211 26,941,738 Payments for redemptions (25,552,156,517) (16,490,996,879) - ------------------------------------------------------------------------------------------------ Increase (decrease) in net assets from capital share transactions (7,831,326) (229,412,998) - ------------------------------------------------------------------------------------------------ Total increase (decrease) in net assets (7,824,349) (229,430,896) Net assets at beginning of year 2,990,490,087 3,219,920,983 - ------------------------------------------------------------------------------------------------ Net assets at end of year $ 2,982,665,738 $ 2,990,490,087 - ------------------------------------------------------------------------------------------------ Undistributed net investment income $ 2,611 $ 456 - ------------------------------------------------------------------------------------------------ </Table> The accompanying Notes to Financial Statements are an integral part of this statement. - -------------------------------------------------------------------------------- 20 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT FINANCIAL HIGHLIGHTS ---------------------------------------------------------- The following table is intended to help you understand the Fund's financial performance. Certain information reflects financial results for a single share held for the periods shown. Total returns assume reinvestment of all dividends and distributions. Total returns are not annualized for periods of less than one year. <Table> <Caption> YEAR ENDED JULY 31, ------------------------------------------- PER SHARE DATA 2010 2009 2008 2007(a) Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 - ---------------------------------------------------------------------------------------------- INCOME FROM INVESTMENT OPERATIONS: Net investment income (loss) .00(b) .009 .04 .04 Net gains (losses) (both realized and unrealized) .00(b) (.011) -- -- Increase from payments by affiliate -- .011 -- -- - ---------------------------------------------------------------------------------------------- Total from investment operations .00(b) .009 .04 .04 - ---------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS: Dividends from net investment income (.00)(b) (.009) (.04) (.04) - ---------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 $1.00 $1.00 - ---------------------------------------------------------------------------------------------- TOTAL RETURN .25% .92%(c) 4.07% 4.66% - ---------------------------------------------------------------------------------------------- RATIOS TO AVERAGE NET ASSETS Total expenses .00%(d) .01% .01% .01%(e) - ---------------------------------------------------------------------------------------------- Net investment income (loss) .23% 1.02% 3.93% 5.37%(e) - ---------------------------------------------------------------------------------------------- SUPPLEMENTAL DATA Net assets, end of period (in millions) $2,983 $2,990 $3,220 $3,229 - ---------------------------------------------------------------------------------------------- </Table> NOTES TO FINANCIAL HIGHLIGHTS (a) For the period from Sept. 26, 2006 (when shares became available) to July 31, 2007. (b) Rounds to less than $0.01 per share. (c) During the year ended July 31, 2009, the Fund received payments by an affiliate. Had the Fund not received these payments, the total return would have been lower by 1.14%. (d) Rounds to less than 0.01%. (e) Annualized. The accompanying Notes to Financial Statements are an integral part of this statement. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 21 NOTES TO FINANCIAL STATEMENTS -------------------------------------------------- 1. ORGANIZATION Columbia Short-Term Cash Fund (the Fund) (formerly known as RiverSource Short- Term Cash Fund) is a series of RiverSource Short Term Investments Series, Inc. (the Corporation) and is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as a diversified, open-end management investment company. The Corporation has 100 billion authorized shares of capital stock that can be allocated among the separate series as designated by the Corporation's Board of Directors (the Board). The Fund invests primarily in money market instruments. Investments in the Fund may be made only by investment companies, common or commingled trust funds or similar organizations or persons that are accredited investors within the meaning of the Securities Act of 1933 (as amended). At July 31, 2010, affiliated funds owned 100% of the Fund's outstanding shares. 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES USE OF ESTIMATES Preparing financial statements that conform to U.S. generally accepted accounting principles requires management to make estimates (e.g., on assets, liabilities and contingent assets and liabilities) that could differ from actual results. VALUATION OF SECURITIES Securities in the Fund are valued utilizing the amortized cost valuation method permitted in accordance with Rule 2a-7 under the 1940 Act provided certain conditions are met, including that the Board continues to believe that the amortized cost valuation method fairly reflects the market-based net asset value per share of the Fund. This method involves valuing a portfolio security initially at its cost and thereafter assuming a constant accretion or amortization to maturity of any discount or premium, respectively. The Board has established procedures intended to stabilize the Fund's net asset value for purposes of sales and redemptions at $1.00 per share. These procedures include determinations, at such intervals as the Board deems appropriate and reasonable in light of current market conditions, of the extent, if any, to which the Fund's market-based net asset value deviates from $1.00 per share. In the event such deviation exceeds 1/2 of 1%, the Board will promptly consider what action, if any, should be initiated. REPURCHASE AGREEMENTS The Fund may enter into repurchase agreements. Generally, securities received as collateral subject to repurchase agreements are deposited with the Fund's custodian and, pursuant to the terms of the repurchase agreement, must have an - -------------------------------------------------------------------------------- 22 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- aggregate market value greater than or equal to the repurchase price plus accrued interest at all times. The market value of securities held as collateral for repurchase agreements is monitored on a daily basis to ensure the existence of the proper level of collateral. GUARANTEES AND INDEMNIFICATIONS Under the Fund's organizational documents, its officers and directors are indemnified against certain liabilities arising out of the performance of their duties to the Fund. In addition, certain of the Fund's contracts with its service providers contain general indemnification clauses. The Fund's maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined and the Fund has no historical basis for predicting the likelihood of any such claims. FEDERAL TAXES The Fund's policy is to comply with Subchapter M of the Internal Revenue Code that applies to regulated investment companies and to distribute substantially all of its taxable income (which includes net short-term capital gains) to shareholders. No provision for income or excise taxes is thus required. The Fund is treated as a separate entity for federal income tax purposes. Management of the Fund has concluded that there are no significant uncertain tax positions that would require recognition in the financial statements. Generally, the tax authorities can examine all tax returns filed for the last three years. DIVIDENDS TO SHAREHOLDERS Dividends from net investment income, declared daily and payable monthly, are reinvested in additional shares of the Fund at net asset value or payable in cash. OTHER Security transactions are accounted for on the date securities are purchased or sold. Interest income, including amortization of premium and discount, is recognized daily. 3. EXPENSES INVESTMENT MANAGEMENT SERVICES Under the Investment Management Services Agreement, Columbia Management Investment Advisers, LLC (formerly known as RiverSource Investments, LLC) (the Investment Manager), subject to the policies set by the Board, provides investment management services. The Fund does not pay the Investment Manager a fee for services, but it does pay taxes, brokerage commissions and nonadvisory expenses. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 23 NOTES TO FINANCIAL STATEMENTS (continued) -------------------------------------- COMPENSATION OF BOARD MEMBERS The Fund does not pay compensation to the board members. Compensation and certain other core expenses are paid directly by other funds managed by the Investment Manager that invest in this Fund. 4. LENDING OF PORTFOLIO SECURITIES The Fund has entered into a Master Securities Lending Agreement (the Agreement) with JPMorgan Chase Bank, National Association (JPMorgan). The Agreement authorizes JPMorgan as lending agent to lend securities to authorized borrowers in order to generate additional income on behalf of the Fund. Pursuant to the Agreement, the securities loaned are secured by cash or U.S. government securities equal to at least 100% of the market value of the loaned securities. Any additional collateral required to maintain those levels due to market fluctuations of the loaned securities is delivered the following business day. Cash collateral received is invested by the lending agent on behalf of the Fund into authorized investments pursuant to the Agreement. The investments made with the cash collateral are listed in the Portfolio of Investments. The values of such investments and any uninvested cash collateral are disclosed in the Statement of Assets and Liabilities along with the related obligation to return the collateral upon the return of the securities loaned. At July 31, 2010, securities valued at $829,579,510 were on loan, secured by U.S. government securities valued at $59,642,198 and by cash collateral of $777,181,600 invested in short-term securities or in cash equivalents. Risks of delay in recovery of securities or even loss of rights in the securities may occur should the borrower of the securities fail financially. Risks may also arise to the extent that the value of the securities loaned increases above the value of the collateral received. JPMorgan will indemnify the Fund from losses resulting from a borrower's failure to return a loaned security when due. Such indemnification does not extend to losses associated with declines in the value of cash collateral investments. Loans are subject to termination by the Fund or the borrower at any time, and are, therefore, not considered to be illiquid investments. Pursuant to the Agreement, the Fund receives income for lending its securities either in the form of fees or by earning interest on invested cash collateral, net of negotiated rebates paid to borrowers and fees paid to the lending agent for services provided and any other securities lending expenses. Net income of $806,986 earned from securities lending for the year ended July 31, 2010 is included in the Statement of Operations. The Fund also continues to earn interest and dividends on the securities loaned. - -------------------------------------------------------------------------------- 24 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- 5. BANK BORROWINGS The Fund has entered into a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A. (the Administrative Agent), whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility became effective on Oct. 15, 2009, replacing a prior credit facility. The credit facility agreement, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits collective borrowings up to $300 million. The borrowers shall have the right, upon written notice to the Administrative Agent to request an increase of up to $200 million in the aggregate amount of the credit facility from new or existing lenders, provided that the aggregate amount of the credit facility shall at no time exceed $500 million. Participation in such increase by any existing lender shall be at such lender's sole discretion. Interest is charged to each Fund based on its borrowings at a rate equal to the sum of the federal funds rate plus (i) 1.25% per annum plus (ii) if one-month LIBOR exceeds the federal funds rate, the amount of such excess. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the amount of the credit facility at a rate of 0.10% per annum, in addition to an upfront fee equal to its pro rata share of 0.04% of the amount of the credit facility. Prior to Oct. 15, 2009, the credit facility agreement, which was a collective agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permitted collective borrowings up to $475 million. Interest was charged to each Fund based on its borrowings at a rate equal to the federal funds rate plus 0.75%. The Fund also paid a commitment fee equal to its pro rata share of the amount of the credit facility at a rate of 0.06% per annum, in addition to an upfront fee equal to its pro rata share of 0.02% of the amount of the credit facility. The Fund had no borrowings during the year ended July 31, 2010. 6. PAYMENTS BY AFFILIATE On Sept. 15, 2008, Lehman Brothers Holdings Inc. (Lehman Brothers) filed a Chapter 11 bankruptcy petition. At that time, the Fund owned $50 million in medium term commercial paper issued by Lehman Brothers (the Lehman Notes). The value of the Lehman Notes declined following Lehman Brothers filing of its bankruptcy petition. From Sept. 16, 2008 through Sept. 30, 2008, Ameriprise Financial, Inc. (Ameriprise Financial), parent company of the Investment Manager, purchased the total $50 million par of the Lehman Notes from the Fund for cash at a price equal to amortized cost plus accrued interest in accordance with Rule 17a-9 of the 1940 Act. The amount shown in the Fund's - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 25 NOTES TO FINANCIAL STATEMENTS (continued) -------------------------------------- Statement of Changes in Net Assets as payments by affiliate is equal to the difference between the fair value of the Lehman Notes at purchase date and the cash received from Ameriprise Financial. 7. FEDERAL TAX INFORMATION Net investment income (loss) and net realized gains (losses) may differ for financial statement and tax purposes. The character of distributions made during the year from net investment income or net realized gains may differ from their ultimate characterization for federal income tax purposes. Also, due to the timing of dividend distributions, the fiscal year in which amounts are distributed may differ from the year that the income or realized gains were recorded by the Fund. The tax character of distributions paid for the periods indicated was as follows: <Table> <Caption> YEAR ENDED JULY 31, 2010 2009 - ---------------------------------------------------------------- Distributions paid from: Ordinary income $6,726,386 $26,871,179 Long-term capital gain -- -- </Table> At July 31, 2010, the components of distributable earnings on a tax basis were as follows: <Table> Undistributed ordinary income..................... $778,123 Undistributed accumulated long-term gain.......... $ -- Accumulated realized loss......................... $(17,313) Unrealized appreciation (depreciation)............ $ -- </Table> For federal income tax purposes, the Fund had a capital loss carry-over of $17,313 at July 31, 2010, that if not offset by capital gains will expire in 2017. For the year ended July 31, 2010, $4,822 of capital loss carry-over was utilized and/or expired unused. It is unlikely the Board will authorize a distribution of any net realized capital gains until the available capital loss carry-over has been offset or expires. There is no assurance that the Fund will be able to utilize all of its capital loss carry-over before it expires. 8. SUBSEQUENT EVENTS Management has evaluated Fund related events and transactions that occurred during the period from the date of the Statement of Assets and Liabilities through the date of issuance of the Fund's financial statements. There were no events or transactions that occurred during the period that materially impacted the amounts or disclosures in the Fund's financial statements. - -------------------------------------------------------------------------------- 26 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- 9. INFORMATION REGARDING PENDING AND SETTLED LEGAL PROCEEDINGS In June 2004, an action captioned John E. Gallus et al. v. American Express Financial Corp. and American Express Financial Advisors Inc. was filed in the United States District Court for the District of Arizona. The plaintiffs allege that they are investors in several American Express Company (now known as legacy RiverSource) mutual funds and they purport to bring the action derivatively on behalf of those funds under the Investment Company Act of 1940. The plaintiffs allege that fees allegedly paid to the defendants by the funds for investment advisory and administrative services are excessive. The plaintiffs seek remedies including restitution and rescission of investment advisory and distribution agreements. The plaintiffs voluntarily agreed to transfer this case to the United States District Court for the District of Minnesota (the District Court). In response to defendants' motion to dismiss the complaint, the District Court dismissed one of plaintiffs' four claims and granted plaintiffs limited discovery. Defendants moved for summary judgment in April 2007. Summary judgment was granted in the defendants' favor on July 9, 2007. The plaintiffs filed a notice of appeal with the Eighth Circuit Court of Appeals (the Eighth Circuit) on August 8, 2007. On April 8, 2009, the Eighth Circuit reversed summary judgment and remanded to the District Court for further proceedings. On August 6, 2009, defendants filed a writ of certiorari with the U.S. Supreme Court (the Supreme Court), asking the Supreme Court to stay the District Court proceedings while the Supreme Court considers and rules in a case captioned Jones v. Harris Associates, which involves issues of law similar to those presented in the Gallus case. On March 30, 2010, the Supreme Court issued its ruling in Jones v. Harris Associates, and on April 5, 2010, the Supreme Court vacated the Eighth Circuit's decision in the Gallus case and remanded the case to the Eighth Circuit for further consideration in light of the Supreme Court's decision in Jones v. Harris Associates. On June 4, 2010, the Eighth Circuit remanded the Gallus case to the District Court for further consideration in light of the Supreme Court's decision in Jones v. Harris Associates. In December 2005, without admitting or denying the allegations, American Express Financial Corporation (AEFC, which is now known as Ameriprise Financial, Inc. (Ameriprise Financial)), entered into settlement agreements with the Securities and Exchange Commission (SEC) and Minnesota Department of Commerce (MDOC) related to market timing activities. As a result, AEFC was censured and ordered to cease and desist from committing or causing any violations of certain provisions of the Investment Advisers Act of 1940, the Investment Company Act of 1940, and various Minnesota laws. AEFC agreed to pay disgorgement of $10 million and civil money penalties of $7 million. AEFC - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 27 NOTES TO FINANCIAL STATEMENTS (continued) -------------------------------------- also agreed to retain an independent distribution consultant to assist in developing a plan for distribution of all disgorgement and civil penalties ordered by the SEC in accordance with various undertakings detailed at http://www.sec.gov/litigation/admin/ia-2451.pdf. Ameriprise Financial and its affiliates have cooperated with the SEC and the MDOC in these legal proceedings, and have made regular reports to the funds' Boards of Directors/Trustees. Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Funds are not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Funds or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Funds. Ameriprise Financial is required to make 10-Q, 10-K and, as necessary, 8-K filings with the Securities and Exchange Commission on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov. There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased fund redemptions, reduced sale of fund shares or other adverse consequences to the Funds. Further, although we believe proceedings are not likely to have a material adverse effect on the Funds or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Funds, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial. - -------------------------------------------------------------------------------- 28 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ----------------------- TO THE BOARD OF DIRECTORS AND SHAREHOLDERS OF COLUMBIA SHORT-TERM CASH FUND: We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Short-Term Cash Fund (the Fund) (formerly RiverSource Short-Term Cash Fund) of the RiverSource Short Term Investment Series, Inc., as of July 31, 2010, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the periods shown therein. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of July 31, 2010, by correspondence with the custodian and brokers, or by other appropriate auditing procedures where replies from brokers were not received. We believe that our audits provide a reasonable basis for our opinion. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 29 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM (continued) ----------- In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Columbia Short-Term Cash Fund of the RiverSource Short Term Investment Series, Inc. at July 31, 2010, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the periods shown therein, in conformity with U.S. generally accepted accounting principles. /s/ Ernst & Young LLP Minneapolis, Minnesota September 20, 2010 - -------------------------------------------------------------------------------- 30 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT FEDERAL INCOME TAX INFORMATION ------------------------------------------------ (UNAUDITED) The Fund is required by the Internal Revenue Code of 1986 to tell its shareholders about the tax treatment of the dividends it pays during its fiscal year. The dividends listed below are reported to you on Form 1099-DIV, Dividends and Distributions. Shareholders should consult a tax advisor on how to report distributions for state and local tax purposes. Fiscal year ended July 31, 2010 <Table> <Caption> INCOME DISTRIBUTIONS - the Fund designates the following tax attributes for distributions: Qualified Dividend Income for individuals.................... 0.00% Dividends Received Deduction for corporations................ 0.00% U.S. Government Obligations.................................. 18.66% </Table> The Fund designates as distributions of long-term gains, to the extent necessary to fully distribute such capital gains, earnings and profits distributed to shareholders on the redemption of shares. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 31 BOARD MEMBERS AND OFFICERS ----------------------------------------------------- Shareholders elect a Board that oversees the Fund's operations. The Board appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following is a list of the Fund's Board members. Each Board member oversees 150 Columbia, RiverSource, Seligman and Threadneedle funds. Under current Board policy, members generally serve until the next regular shareholders' meeting, until he or she reaches the mandatory retirement age established by the Board, or the fifteenth anniversary of the first Board meeting they attended as members of the Board. INDEPENDENT BOARD MEMBERS* <Table> <Caption> OTHER PRESENT OR NAME, POSITION HELD PAST DIRECTORSHIPS ADDRESS, WITH FUND AND PRINCIPAL OCCUPATION (WITHIN PAST 5 AGE LENGTH OF SERVICE DURING PAST FIVE YEARS YEARS) - ------------------------------------------------------------------------------------------------------------------------------ Kathleen Blatz Board member since Chief Justice, Minnesota Supreme Court, 1998-2006; None 901 S. Marquette Ave. 1/11/06 Attorney Minneapolis, MN 55402 Age 56 - ------------------------------------------------------------------------------------------------------------------------------ Arne H. Carlson Board member since Chair, RiverSource and Threadneedle Funds, 1999-2006; None 901 S. Marquette Ave. 1/5/99 former Governor of Minnesota Minneapolis, MN 55402 Age 76 - ------------------------------------------------------------------------------------------------------------------------------ Pamela G. Carlton Board member since President, Springboard -- Partners in Cross Cultural None 901 S. Marquette Ave. 7/11/07 Leadership (consulting company) Minneapolis, MN 55402 Age 55 - ------------------------------------------------------------------------------------------------------------------------------ Patricia M. Flynn Board member since Trustee Professor of Economics and Management, Bentley None 901 S. Marquette Ave. 11/1/04 University; former Dean, McCallum Graduate School of Minneapolis, MN 55402 Business, Bentley University Age 59 - ------------------------------------------------------------------------------------------------------------------------------ Anne P. Jones Board member since Attorney and Consultant None 901 S. Marquette Ave. 3/1/85 Minneapolis, MN 55402 Age 75 - ------------------------------------------------------------------------------------------------------------------------------ Jeffrey Laikind, CFA Board member since Former Managing Director, Shikiar Asset Management American Progressive 901 S. Marquette Ave. 11/1/05 Insurance; Hapoalim Minneapolis, MN 55402 Securities USA, Inc. Age 74 - ------------------------------------------------------------------------------------------------------------------------------ Stephen R. Lewis, Jr. Chair of the Board President Emeritus and Professor of Economics, Carleton Valmont Industries, 901 S. Marquette Ave. since 1/1/07, College Inc. (manufactures Minneapolis, MN 55402 Board member irrigation systems) Age 71 since 1/1/02 - ------------------------------------------------------------------------------------------------------------------------------ </Table> - -------------------------------------------------------------------------------- 32 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- INDEPENDENT BOARD MEMBERS (CONTINUED) <Table> <Caption> OTHER PRESENT OR NAME, POSITION HELD PAST DIRECTORSHIPS ADDRESS, WITH FUND AND PRINCIPAL OCCUPATION (WITHIN PAST 5 AGE LENGTH OF SERVICE DURING PAST FIVE YEARS YEARS) - ------------------------------------------------------------------------------------------------------------------------------ John F. Maher Board member Retired President and Chief Executive Officer and None 901 S. Marquette Ave. since 12/10/08 former Director, Great Western Financial Corporation Minneapolis, MN 55402 (financial services), 1986-1997 Age 67 - ------------------------------------------------------------------------------------------------------------------------------ Catherine James Paglia Board member since Director, Enterprise Asset Management, Inc. (private None 901 S. Marquette Ave. 11/1/04 real estate and asset management company) Minneapolis, MN 55402 Age 58 - ------------------------------------------------------------------------------------------------------------------------------ Leroy C. Richie Board member Counsel, Lewis & Munday, P.C. since 1987; Vice Digital Ally, Inc. 901 S. Marquette Ave. since 11/11/08 President and General Counsel, Automotive Legal (digital imaging); Minneapolis, MN 55402 Affairs, Chrysler Corporation, 1990-1997 Infinity, Inc. (oil Age 69 and gas exploration and production); OGE Energy Corp. (energy and energy services) - ------------------------------------------------------------------------------------------------------------------------------ Alison Taunton-Rigby Board member since Chief Executive Officer and Director, RiboNovix, Inc. Idera 901 S. Marquette Ave. 11/13/02 since 2003 (biotechnology); former President, Aquila Pharmaceuticals, Minneapolis, MN 55402 Biopharmaceuticals Inc. Age 66 (biotechnology); Healthways, Inc. (health management programs) - ------------------------------------------------------------------------------------------------------------------------------ </Table> * Mr. Laikind may be deemed, as a technical matter, an interested person of RiverSource International Managers Series, Inc. and RiverSource Variable Series Trust because he serves as an independent director of a broker-dealer that has executed transactions for subadvisers to certain of the funds. - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 33 BOARD MEMBERS AND OFFICERS (continued) ----------------------------------------- BOARD MEMBER AFFILIATED WITH THE INVESTMENT MANAGER* <Table> <Caption> OTHER PRESENT OR NAME, POSITION HELD PAST DIRECTORSHIPS ADDRESS, WITH FUND AND PRINCIPAL OCCUPATION (WITHIN PAST 5 AGE LENGTH OF SERVICE DURING PAST FIVE YEARS YEARS) - ------------------------------------------------------------------------------------------------------------------------------ William F. Truscott Board member Chairman of the Board, Columbia Management Investment None 53600 Ameriprise since 11/7/01, Advisers, LLC (formerly RiverSource Investments, LLC) Financial Center Vice President since since May 2010 (previously President, Chairman of the Minneapolis, MN 55474 2002 Board and Chief Investment Officer, 2001-April 2010); Age 50 Senior Vice President, Atlantic Funds, Columbia Funds and Nations Funds since May 2010; Chief Executive Officer, U.S. Asset Management & President -- Annuities, Ameriprise Financial, Inc. since May 2010 (previously President -- U.S. Asset Management and Chief Investment Officer, 2005-April 2010 and Senior Vice President -- Chief Investment Officer, 2001-2005); Director, President and Chief Executive Officer, Ameriprise Certificate Company since 2006; Director, Columbia Management Investment Distributors, Inc. (formerly RiverSource Fund Distributors, Inc.) since May 2010 (previously Chairman of the Board and Chief Executive Officer, 2008-April 2010); Chairman of the Board and Chief Executive Officer, RiverSource Distributors, Inc. since 2006 - ------------------------------------------------------------------------------------------------------------------------------ </Table> * Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the investment manager or Ameriprise Financial. The SAI has additional information about the Fund's Board members and is available, without charge, upon request by calling 800.345.6611 or contacting your financial intermediary. - -------------------------------------------------------------------------------- 34 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. In addition to Mr. Truscott, who is Vice President, the Fund's other officers are: FUND OFFICERS <Table> <Caption> NAME, POSITION HELD ADDRESS, WITH FUNDS AND PRINCIPAL OCCUPATION AGE LENGTH OF SERVICE DURING PAST FIVE YEARS - -------------------------------------------------------------------------------------------------------- J. Kevin Connaughton President since Senior Vice President and General Manager -- Mutual One Financial Center 5/1/10 Fund Products, Columbia Management Investment Advisers, Boston, MA 02111 LLC since May 2010; President, Columbia Funds since Age 46 2009 (previously Senior Vice President and Chief Financial Officer, June 2008 -- January 2009); President, Atlantic Funds and Nations Funds since 2009; Managing Director of Columbia Management Advisors, LLC, December 2004 -- April 2010; Treasurer, Columbia Funds, October 2003 -- May 2008; Treasurer, the Liberty Funds, Stein Roe Funds and Liberty All-Star Funds, December 2000 -- December 2006; Senior Vice President -- Columbia Management Advisors, LLC, April 2003 -- December 2004; President, Columbia Funds, Liberty Funds and Stein Roe Funds, February 2004 -- October 2004 - -------------------------------------------------------------------------------------------------------- Amy K. Johnson Vice President since Senior Vice President and Chief Operating Officer, 5228 Ameriprise Financial 12/5/06 Columbia Management Investment Advisers, LLC (formerly Center Minneapolis, MN RiverSource Investments, LLC) since May 2010 55474 (previously Chief Administrative Officer, 2009 -- April Age 45 2010 and Vice President -- Asset Management and Trust Company Services, 2006-2009 and Vice President -- Operations and Compliance, 2004-2006); Senior Vice President, Atlantic Funds, Columbia Funds and Nations Funds since May 2010; Director of Product Development -- Mutual Funds, Ameriprise Financial, Inc., 2001-2004 - -------------------------------------------------------------------------------------------------------- Jeffrey P. Fox Treasurer since Chief Financial Officer, Columbia Management Investment 105 Ameriprise 7/10/02 Distributors, Inc. (formerly RiverSource Fund Financial Center Distributors, Inc.) and of Seligman Data Corp. since Minneapolis, MN 55474 2008; Vice President -- Investment Accounting, Age 55 Ameriprise Financial, Inc. since 2002; Chief Financial Officer, RiverSource Distributors, Inc. since 2006 - -------------------------------------------------------------------------------------------------------- </Table> - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 35 BOARD MEMBERS AND OFFICERS (continued) ----------------------------------------- FUND OFFICERS (CONTINUED) <Table> <Caption> NAME, POSITION HELD ADDRESS, WITH FUNDS AND PRINCIPAL OCCUPATION AGE LENGTH OF SERVICE DURING PAST FIVE YEARS - -------------------------------------------------------------------------------------------------------- Scott R. Plummer Vice President, Chief Legal Officer and Assistant Secretary, Columbia 5228 Ameriprise Financial General Counsel and Management Investment Advisers, LLC (formerly Center Secretary since RiverSource Investments, LLC) since June 2005; Vice Minneapolis, MN 55474 12/5/06 President and Lead Chief Counsel -- Asset Management, Age 51 Ameriprise Financial, Inc. since May 2010 (previously Vice President and Chief Counsel -- Asset Management, 2005-April 2010 and Vice President -- Asset Management Compliance, 2004-2005); Senior Vice President, Secretary and Chief Legal Officer, Atlantic Funds, Columbia Funds and Nations Funds since May 2010; Vice President, Chief Counsel and Assistant Secretary, Columbia Management Investment Distributors, Inc. (formerly RiverSource Fund Distributors, Inc.) since 2008; Vice President, General Counsel and Secretary, Ameriprise Certificate Company since 2005; Chief Counsel, RiverSource Distributors, Inc. since 2006; Senior Vice President and Chief Compliance Officer, USBancorp Asset Management, 2002-2004 - -------------------------------------------------------------------------------------------------------- Michael A. Jones Vice President since Director and President, Columbia Management Investment 100 Federal Street 5/1/10 Advisers, LLC since May 2010; President and Director, Boston, MA 02110 Columbia Management Investment Distributors, Inc. since Age 51 May 2010; Senior Vice President, Atlantic Funds, Columbia Funds and Nations Funds since May 2010; Manager, Chairman, Chief Executive Officer and President, Columbia Management Advisors, LLC, 2007 -- April 2010; Chief Executive Officer, President and Director, Columbia Management Distributors, Inc., 2006 -- April 2010; former Co-President and Senior Managing Director, Robeco Investment Management - -------------------------------------------------------------------------------------------------------- Colin Moore Vice President since Chief Investment Officer, Columbia Management One Financial Center 5/1/10 Investment Advisers, LLC since May 2010; Senior Vice Boston, MA 02111 President, Atlantic Funds, Columbia Funds and Nations Age 52 Funds since May 2010; Manager, Managing Director and Chief Investment Officer, Columbia Management Advisors, LLC, 2007- April 2010; Head of Equities, Columbia Management Advisors, LLC, 2002-Sept. 2007 - -------------------------------------------------------------------------------------------------------- Linda Wondrack Chief Compliance Vice President and Chief Compliance Officer, Columbia One Financial Center Officer since 5/1/10 Management Investment Advisers, LLC since May 2010; Boston, MA 02111 Chief Compliance Officer, Columbia Funds since 2007; Age 46 Senior Vice President and Chief Compliance Officer, Atlantic Funds and Nations Funds since 2007; Director (Columbia Management Group, LLC and Investment Product Group Compliance), Bank of America, June 2005 -- April 2010; Director of Corporate Compliance and Conflicts Officer, MFS Investment Management (investment management), August 2004 -- May 2005 - -------------------------------------------------------------------------------------------------------- </Table> - -------------------------------------------------------------------------------- 36 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- FUND OFFICERS (CONTINUED) <Table> <Caption> NAME, POSITION HELD ADDRESS, WITH FUNDS AND PRINCIPAL OCCUPATION AGE LENGTH OF SERVICE DURING PAST FIVE YEARS - -------------------------------------------------------------------------------------------------------- Neysa M. Alecu Money Laundering Vice President -- Compliance, Ameriprise Financial, 2934 Ameriprise Financial Prevention Officer Inc. since 2008; Anti-Money Laundering Officer and Center since 11/9/05 and Identity Theft Prevention Officer, Columbia Management Minneapolis, MN 55474 Identity Theft Investment Distributors, Inc. (formerly RiverSource Age 46 Prevention Officer Fund Distributors, Inc.) since 2008; Anti-Money since 2008 Laundering Officer, Ameriprise Financial, Inc. since 2005; Compliance Director, Ameriprise Financial, Inc., 2004-2008 - -------------------------------------------------------------------------------------------------------- </Table> - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 37 APPROVAL OF INVESTMENT MANAGEMENT SERVICES AGREEMENT ---------------------------------------------------------------------- Columbia Management Investment Advisers, LLC ("Columbia Management" or the "investment manager"), formerly known as RiverSource Investments, LLC, a wholly- owned subsidiary of Ameriprise Financial, Inc. ("Ameriprise Financial"), serves as the investment manager to the Fund. Under an investment management services agreement (the "IMS Agreement"), Columbia Management provides investment advice and other services to the Fund and all Funds branded Columbia, RiverSource, Seligman and Threadneedle. On an annual basis, the Fund's Board of Directors (the "Board"), including the independent Board members (the "Independent Directors"), considers renewal of the IMS Agreement. Columbia Management prepared detailed reports for the Board and its Contracts Committee in March and April 2010, including reports based on data provided by independent organizations and a comprehensive response to each item of information requested by independent legal counsel to the Independent Directors ("Independent Legal Counsel") in a letter to the investment manager, to assist the Board in making this determination. All of the materials presented in March and April 2010 were first supplied in draft form to designated representatives of the Independent Directors, i.e., Independent Legal Counsel, the Chair of the Board and the Chair of the Contracts Committee, and the final materials were revised to reflect comments provided by these Board representatives. In addition, throughout the year, the Board (or its committees) reviews information prepared by Columbia Management addressing the services Columbia Management provides and Fund performance. The Board accords particular weight to the work, deliberations and conclusions of the Contracts Committee, the Investment Review Committee and the Compliance Committee in determining whether to continue the IMS Agreement. At the April 6-8, 2010 in-person Board meeting, Independent Legal Counsel reviewed with the Independent Directors, including in an executive session without management, various factors relevant to the Board's consideration of advisory agreements and the Board's legal responsibilities related to such consideration. Following an analysis and discussion of the factors identified below, the Board, including all of the Independent Directors, approved renewal of the IMS Agreement. Nature, Extent and Quality of Services Provided by Columbia Management: The Board analyzed various reports and presentations it had received detailing the services performed by Columbia Management, as well as its expertise, resources and capabilities. The Board specifically considered many developments during the past year concerning the services provided by Columbia Management, including, in particular, the continued investment in, and resources dedicated to, the Fund's operations, most notably, management's announcement of the massive investment - -------------------------------------------------------------------------------- 38 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT - -------------------------------------------------------------------------------- made in the acquisition of the long-term asset management business of Columbia Management Group, LLC (the "Columbia Transaction") and the completed integration of J. & W. Seligman & Co. Incorporated, acquisitions which should continue to enhance investment capabilities and provide access to a greater depth of experienced portfolio managers in key categories. The Board noted, in particular, that upon the close of the Columbia Transaction, the investment manager will have grown to 10 investment offices (compared to 6 in 2009). In addition, the Board reviewed information concerning the investment manager's new Chief Investment Officer upon the close of the Columbia Transaction, including the application of his particular investment philosophy, which is intended to enhance the risk and portfolio management oversight of the entire fund family. Moreover, in connection with the Board's evaluation of the overall package of services provided by Columbia Management, the Board considered the quality of the administrative and transfer agency services provided by Columbia Management's affiliates to the Fund. The Board also reviewed the financial condition of Columbia Management and its affiliates, and each entity's ability to carry out its responsibilities under the IMS Agreement. Further, the Board considered Columbia Management's ability to retain key personnel in certain targeted areas and its expectations in this regard. The Board also discussed the acceptability of the terms of the IMS Agreement (including the relatively broad scope of services required to be performed by Columbia Management). The Board concluded that the services being performed under the IMS Agreement were of a reasonably high quality. Based on the foregoing, and based on other information received (both oral and written, including the information on investment performance referenced below) and other considerations, the Board concluded that Columbia Management and its affiliates were in a position to continue to provide a high quality and level of services to the Fund. Investment Performance: For purposes of evaluating the nature, extent and quality of services provided under the IMS Agreement, the Board carefully reviewed the investment performance of the Fund. In this regard, the Board considered detailed reports containing data prepared by an independent organization showing, for various periods, the performance of the Fund and the net assets of the Fund. The Board observed that the Fund's investment performance met expectations. Comparative Fees, Costs of Services Provided and the Profits Realized By Columbia Management and its Affiliates from their Relationships with the Fund: The Board reviewed comparative fees and the costs of services to be provided - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 39 APPROVAL OF INVESTMENT MANAGEMENT SERVICES AGREEMENT (continued) ---------------------------------------------------------- under the IMS Agreement. The Board accorded particular weight to the notion that the level of fees should reflect a rational pricing model applied consistently across the various product lines in the legacy RiverSource Funds' family, while assuring that the overall fees for each fund (with few defined exceptions) are generally in line with the "pricing philosophy" (i.e., that the total expense ratio of each fund, with few exceptions, is at or below the median expense ratio of funds in the same comparison group). The Board observed that the Fund, commonly referred to as a "cash pool fund," is designed to serve as a vehicle for other funds managed by Columbia Management to invest their cash balances as a way to improve their portfolio diversification and returns. Because Columbia Management collects management fees on the funds that invest in the Fund, the Fund does not carry management fees. The Board also noted that the Fund does not carry administrative fees, transfer agency fees or distribution fees. The Board also considered various preliminary integration plans in connection with the Columbia Transaction which, if implemented, would impact the fee structures of various legacy RiverSource Funds. The Board was satisfied with the principles underlying these plans, which, at their preliminary stage, are designed to achieve a rational, consistent pricing model across the combined fund families, as well as preserve the "pricing philosophy" of the legacy RiverSource Funds. The Board also considered the expected profitability of Columbia Management and its affiliates in connection with Columbia Management providing investment management services to the Fund. In this regard, the Board referred to a detailed profitability report, discussing the profitability to Columbia Management and Ameriprise Financial from managing and operating the Fund, including data showing comparative profitability over the past two years. In this regard, the Board observed slightly reduced profitability in 2009 vs. 2008. The Board concluded that profitability levels were reasonable. Economies of Scale to be Realized: Given that the Fund does not pay any investment management services fees, the Board determined not to accord weight to the lack of any material economies of scale associated with the growth of the Fund. Based on the foregoing, the Board, including all of the Independent Directors, concluded that the fees were fair and reasonable in light of the extent and quality of services provided. In reaching this conclusion, no single factor was determinative. On April 8, 2010, the Board, including all of the Independent Directors, approved the renewal of the IMS Agreement for an additional annual period. - -------------------------------------------------------------------------------- 40 COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT PROXY VOTING ------------------------------------------------------------------- The policy of the Board is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; or searching the website of the Securities and Exchange Commission (SEC) at http://www.sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31 for the most recent 12- month period ending June 30 of that year, and is available without charge by visiting columbiamanagement.com; or searching the website of the SEC at www.sec.gov. S-6283 F (9/10) - -------------------------------------------------------------------------------- COLUMBIA SHORT-TERM CASH FUND -- 2010 ANNUAL REPORT 41 Item 2. Code of Ethics. (a) The Registrant has adopted a code of ethics that applies to the Registrant's principal executive officer and principal financial officer. (b) During the period covered by this report, there were not any amendments to a provision of the code of ethics adopted in 2(a) above. (c) During the period covered by this report, there were no waivers, including any implicit waivers, from a provision of the code of ethics described in 2(a) above that relates to one or more of the items set forth in paragraph (b) of this item's instructions. Item 3. Audit Committee Financial Expert. The Registrant's board of directors has determined that independent directors Pamela G. Carlton, Jeffrey Laikind, John F. Maher and Anne P. Jones, each qualify as audit committee financial experts. Item 4. Principal Accountant Fees and Services (a) Audit Fees. The fees for the year ended July 31, to Ernst & Young LLP for professional services rendered for the audits of the annual financial statements for RiverSource Short Term Investments Series, Inc. were as follows: 2010 - $26,487 2009 - $26,431 (b) Audit-Related Fees. The fees for the year ended July 31, to Ernst & Young LLP for additional audit-related services rendered related to the semiannual financial statement review and the 2010 transfer agent 17Ad-13 review for RiverSource Short Term Investments Series, Inc. were as follows: 2010 - $1,866 2009 - $375 (c) Tax Fees. The fees for the year ended July 31, to Ernst & Young LLP for tax compliance related services rendered for RiverSource Short Term Investments Series, Inc. were as follows: 2010 - $3,196 2009 - $3,180 (d) All Other Fees. The fees for the year ended July 31, to Ernst & Young LLP for additional professional services rendered for RiverSource Short Term Investments Series, Inc. were as follows: 2010 - $0 2009 - $0 (e) (1) Audit Committee Pre-Approval Policy. Pursuant to Sarbanes-Oxley pre-approval requirements, all services to be performed by Ernst & Young LLP for the registrant and to the registrant's investment adviser and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant must be pre-approved by the audit committee. (e) (2) 100% of the services performed for items (b) through (d) above during 2010 and 2009 were pre-approved by the audit committee. (f) Not applicable. (g) Non-Audit Fees. The fees for the year ended July 31, to Ernst & Young LLP by the registrant for non-audit fees and by the registrant's investment adviser, and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant were as follows: 2010 - $2,116,023 2009 - $826,041 (h) 100% of the services performed in item (g) above during 2010 and 2009 were pre-approved by the Ameriprise Financial Audit Committee and/or the RiverSource Mutual Funds Audit Committee. Item 5. Audit Committee of Listed Registrants. Not applicable. Item 6. Investments. (a) The registrant's "Schedule 1 - Investments in securities of unaffiliated issuers" (as set forth in 17 CFR 210.12-12) is included in Item 1 of this Form N-CSR. (b) Not applicable. Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies. Not applicable. Item 8. Portfolio Managers of Closed-End Management Investment Companies. Not applicable. Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers. Not applicable. Item 10. Submission of Matters to a Vote of Security Holders. There were no material changes to the procedures by which shareholders may recommend nominees to the registrant's board of directors. Item 11. Controls and Procedures. (a) The registrant's principal executive officer and principal financial officer, based on their evaluation of the registrant's disclosure controls and procedures as of a date within 90 days of the filing of this report, have concluded that such controls and procedures are adequately designed to ensure that information required to be disclosed by the registrant in Form N-CSR is accumulated and communicated to the registrant's management, including principal executive officer and principal financial officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. (b) There was no change in the registrant's internal controls over financial reporting that occurred during the registrant's second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 12. Exhibits. (a)(1) Code of ethics required to be disclosed under Item 2 of Form N-CSR, is attached as Exhibit 99.CODE ETH. (a)(2) Certifications pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) attached hereto as Exhibit99.CERT. (a)(3) Not applicable. (b) Certification pursuant to Rule 30a-2(b) under the Investment Company Act of 1940 (17 CFR 270.30a-2(b)) attached hereto as Exhibit 99.906CERT. 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) RiverSource Short Term Investments Series, Inc.t By /s/ J. Kevin Connaughton ---------------------------------- J. Kevin Connaughton President and Principal Executive Officer Date October 7, 2010 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 /s/ J. Kevin Connaughton ---------------------------------- J. Kevin Connaughton President and Principal Executive Officer Date October 7, 2010 By /s/ Jeffrey P. Fox ---------------------------------- Jeffrey P. Fox Treasurer and Principal Financial Officer Date October 7, 2010