| Columbia Acorn® Fund | Quarterly Report 2021 | 1 |
| 2 | Columbia Acorn® Fund | Quarterly Report 2021 |
| Columbia Acorn® Fund | Quarterly Report 2021 | 3 |
| (a) | Non-income producing investment. |
| (b) | All or a portion of this security was on loan at March 31, 2021. The total market value of securities on loan at March 31, 2021 was $47,009,741. |
| (c) | As defined in the Investment Company Act of 1940, as amended, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the holdings and transactions in these affiliated companies during the period ended March 31, 2021 are as follows: |
| Affiliated issuers | Beginning of period($) | Purchases($) | Sales($) | Net change in unrealized appreciation (depreciation)($) | End of period($) | Realized gain (loss)($) | Dividends($) | End of period shares |
| Columbia Short-Term Cash Fund, 0.067% | ||||||||
| 39,795,717 | 574,098,174 | (524,066,313) | (4,300) | 89,823,278 | 4,301 | 17,993 | 89,832,261 | |
| ePlus, Inc.‡,† | ||||||||
| — | 47,101,170 | (32,575,497) | — | — | 3,114,795 | — | — | |
| Hamilton Lane, Inc., Class A‡,† | ||||||||
| — | 48,305,512 | — | — | — | — | 270,000 | — | |
| Kiniksa Pharmaceuticals Ltd., Class A† | ||||||||
| 28,164,513 | — | (13,062,908) | 3,002,426 | — | 438,624 | — | — | |
| Poshmark, Inc., Class A‡,† | ||||||||
| — | 44,707,369 | (11,237,810) | — | — | (4,973,855) | — | — | |
| Total | 67,960,230 | 2,998,126 | 89,823,278 | (1,416,135) | 287,993 | |||
| ‡ | Issuer was not an affiliate at the beginning of period. |
| † | Issuer was not an affiliate at the end of period. |
| (d) | The rate shown is the seven-day current annualized yield at March 31, 2021. |
| (e) | Investment made with cash collateral received from securities lending activity. |
| ADR | American Depositary Receipt |
| 4 | Columbia Acorn® Fund | Quarterly Report 2021 |
| Columbia Acorn International® | Quarterly Report 2021 | 5 |
| 6 | Columbia Acorn International® | Quarterly Report 2021 |
| Money Market Funds 2.9% | ||
| Shares | Value ($) | |
| Columbia Short-Term Cash Fund, 0.067%(d),(f) | 70,142,590 | 70,135,576 |
| Total Money Market Funds (Cost $70,135,576) | 70,135,576 | |
| Total Investments in Securities (Cost $1,656,801,356) | 2,443,084,303 | |
| Obligation to Return Collateral for Securities Loaned | (24,606,463) | |
| Other Assets & Liabilities, Net | 26,689,317 | |
| Net Assets | $2,445,167,157 | |
| Long futures contracts | ||||||
| Description | Number of contracts | Expiration date | Trading currency | Notional amount | Value/Unrealized appreciation ($) | Value/Unrealized depreciation ($) |
| MSCI EAFE Index | 259 | 06/2021 | USD | 28,386,400 | — | (57,694) |
| MSCI Emerging Markets Index | 489 | 06/2021 | USD | 32,335,125 | — | (14,785) |
| Total | — | (72,479) | ||||
| (a) | Non-income producing investment. |
| (b) | All or a portion of this security was on loan at March 31, 2021. The total market value of securities on loan at March 31, 2021 was $23,550,656. |
| (c) | Represents privately placed and other securities and instruments exempt from Securities and Exchange Commission registration (collectively, private placements), such as Section 4(a)(2) and Rule 144A eligible securities, which are often sold only to qualified institutional buyers. At March 31, 2021, the total value of these securities amounted to $32,689,335, which represents 1.34% of total net assets. |
| (d) | The rate shown is the seven-day current annualized yield at March 31, 2021. |
| (e) | Investment made with cash collateral received from securities lending activity. |
| (f) | As defined in the Investment Company Act of 1940, as amended, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the holdings and transactions in these affiliated companies during the period ended March 31, 2021 are as follows: |
| Affiliated issuers | Beginning of period($) | Purchases($) | Sales($) | Net change in unrealized appreciation (depreciation)($) | End of period($) | Realized gain (loss)($) | Dividends($) | End of period shares |
| Columbia Short-Term Cash Fund, 0.067% | ||||||||
| 61,934,514 | 168,900,714 | (160,699,652) | — | 70,135,576 | — | 13,762 | 70,142,590 | |
| ADR | American Depositary Receipt |
| GDR | Global Depositary Receipt |
| USD | US Dollar |
| Columbia Acorn International® | Quarterly Report 2021 | 7 |
| 8 | Columbia Acorn USA® | Quarterly Report 2021 |
| Columbia Acorn USA® | Quarterly Report 2021 | 9 |
| Long futures contracts | ||||||
| Description | Number of contracts | Expiration date | Trading currency | Notional amount | Value/Unrealized appreciation ($) | Value/Unrealized depreciation ($) |
| Russell 2000 Index E-mini | 37 | 06/2021 | USD | 4,111,625 | 109,741 | — |
| (a) | Non-income producing investment. |
| (b) | All or a portion of this security was on loan at March 31, 2021. The total market value of securities on loan at March 31, 2021 was $3,484,313. |
| (c) | The rate shown is the seven-day current annualized yield at March 31, 2021. |
| (d) | Investment made with cash collateral received from securities lending activity. |
| 10 | Columbia Acorn USA® | Quarterly Report 2021 |
| (e) | As defined in the Investment Company Act of 1940, as amended, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the holdings and transactions in these affiliated companies during the period ended March 31, 2021 are as follows: |
| Affiliated issuers | Beginning of period($) | Purchases($) | Sales($) | Net change in unrealized appreciation (depreciation)($) | End of period($) | Realized gain (loss)($) | Dividends($) | End of period shares |
| Columbia Short-Term Cash Fund, 0.067% | ||||||||
| 3,540,814 | 53,446,717 | (46,326,945) | (795) | 10,659,791 | 796 | 2,435 | 10,660,857 | |
| ADR | American Depositary Receipt |
| USD | US Dollar |
| Columbia Acorn USA® | Quarterly Report 2021 | 11 |
| 12 | Columbia Acorn International SelectSM | Quarterly Report 2021 |
| Money Market Funds 1.9% | ||
| Shares | Value ($) | |
| Columbia Short-Term Cash Fund, 0.067%(d),(e) | 8,868,085 | 8,867,199 |
| Total Money Market Funds (Cost $8,867,199) | 8,867,199 | |
| Total Investments in Securities (Cost $357,314,119) | 458,711,116 | |
| Other Assets & Liabilities, Net | 1,020,075 | |
| Net Assets | $459,731,191 | |
| (a) | Non-income producing investment. |
| (b) | Represents fair value as determined in good faith under procedures approved by the Board of Trustees. At March 31, 2021, the total value of these securities amounted to $3, which represents less than 0.01% of total net assets. |
| (c) | Valuation based on significant unobservable inputs. |
| (d) | The rate shown is the seven-day current annualized yield at March 31, 2021. |
| (e) | As defined in the Investment Company Act of 1940, as amended, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the holdings and transactions in these affiliated companies during the period ended March 31, 2021 are as follows: |
| Affiliated issuers | Beginning of period($) | Purchases($) | Sales($) | Net change in unrealized appreciation (depreciation)($) | End of period($) | Realized gain (loss)($) | Dividends($) | End of period shares |
| Columbia Short-Term Cash Fund, 0.067% | ||||||||
| 3,594,978 | 31,085,196 | (25,812,975) | — | 8,867,199 | — | 1,093 | 8,868,085 | |
| ADR | American Depositary Receipt |
| Columbia Acorn International SelectSM | Quarterly Report 2021 | 13 |
| (a) | As defined in the Investment Company Act of 1940, as amended, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the holdings and transactions in these affiliated companies during the period ended March 31, 2021 are as follows: |
| Affiliated issuers | Beginning of period($) | Purchases($) | Sales($) | Net change in unrealized appreciation (depreciation)($) | End of period($) | Capital gain distributions($) | Realized gain (loss)($) | Dividends — affiliated issuers ($) | End of period shares |
| Columbia Acorn International®, Institutional 3 Class | |||||||||
| 86,086,340 | 7,363,294 | — | (167,853) | 93,281,781 | — | — | — | 2,668,243 | |
| Columbia Acorn® Fund, Institutional 3 Class | |||||||||
| 84,751,736 | 7,010,458 | — | 1,655,125 | 93,417,319 | — | — | — | 5,055,050 | |
| 14 | Columbia Thermostat FundSM | Quarterly Report 2021 |
| Affiliated issuers | Beginning of period($) | Purchases($) | Sales($) | Net change in unrealized appreciation (depreciation)($) | End of period($) | Capital gain distributions($) | Realized gain (loss)($) | Dividends — affiliated issuers ($) | End of period shares |
| Columbia Contrarian Core Fund, Institutional 3 Class | |||||||||
| 85,172,403 | 3,505,536 | — | 6,210,262 | 94,888,201 | — | — | — | 2,844,370 | |
| Columbia Corporate Income Fund, Institutional 3 Class | |||||||||
| 84,644,993 | 14,826,266 | — | (4,092,223) | 95,379,036 | — | — | 526,923 | 8,922,267 | |
| Columbia Diversified Fixed Income Allocation ETF | |||||||||
| 84,444,150 | 14,864,486 | — | (4,075,071) | 95,233,565 | — | — | 351,075 | 4,509,165 | |
| Columbia Dividend Income Fund, Institutional 3 Class | |||||||||
| 83,970,346 | 6,162,808 | — | 7,497,847 | 97,631,001 | — | — | 412,805 | 3,424,448 | |
| Columbia Large Cap Enhanced Core Fund, Institutional 3 Class | |||||||||
| 84,343,847 | 4,930,845 | — | 6,881,501 | 96,156,193 | — | — | — | 3,313,446 | |
| Columbia Large Cap Index Fund, Institutional 3 Class | |||||||||
| 254,114,521 | 16,710,002 | — | 16,118,024 | 286,942,547 | — | — | — | 4,870,863 | |
| Columbia Quality Income Fund, Institutional 3 Class | |||||||||
| 169,430,970 | 18,561,871 | — | 2,301,586 | 190,294,427 | — | — | 1,406,209 | 8,331,630 | |
| Columbia Research Enhanced Core ETF | |||||||||
| 83,125,929 | 6,115,275 | — | 7,470,088 | 96,711,292 | — | — | — | 3,623,435 | |
| Columbia Select Mid Cap Value Fund, Institutional 3 Class | |||||||||
| 87,709,618 | 153,815 | — | 11,749,276 | 99,612,709 | — | — | 153,814 | 7,592,432 | |
| Columbia Short Term Bond Fund, Institutional 3 Class | |||||||||
| 126,683,822 | 16,039,227 | — | (164,484) | 142,558,565 | — | — | 537,240 | 14,128,698 | |
| Columbia Short-Term Cash Fund, 0.067% | |||||||||
| 6,901,030 | 121,074,427 | (120,899,201) | — | 7,076,256 | — | — | 2,005 | 7,076,963 | |
| Columbia Total Return Bond Fund, Institutional 3 Class | |||||||||
| 84,645,589 | 12,462,107 | — | (1,910,198) | 95,197,498 | — | — | 885,290 | 2,531,175 | |
| Columbia U.S. Treasury Index Fund, Institutional 3 Class | |||||||||
| 295,666,771 | 51,042,995 | — | (14,702,137) | 332,007,629 | — | — | 964,952 | 28,820,107 | |
| Total | 1,701,692,065 | 34,771,743 | 1,916,388,019 | — | — | 5,240,313 | |||
| (b) | Non-income producing investment. |
| (c) | The rate shown is the seven-day current annualized yield at March 31, 2021. |
| Columbia Thermostat FundSM | Quarterly Report 2021 | 15 |
| 16 | Columbia Acorn European FundSM | Quarterly Report 2021 |
| Common Stocks (continued) | ||
| Issuer | Shares | Value ($) |
| United States 1.7% | ||
| Inter Parfums, Inc. | 27,827 | 1,973,769 |
| Total Common Stocks (Cost $74,806,591) | 114,968,947 | |
| Money Market Funds 4.0% | ||
| Shares | Value ($) | |
| Columbia Short-Term Cash Fund, 0.067%(c),(d) | 4,755,848 | 4,755,373 |
| Total Money Market Funds (Cost $4,755,373) | 4,755,373 | |
| Total Investments in Securities (Cost $79,561,964) | 119,724,320 | |
| Other Assets & Liabilities, Net | (560,459) | |
| Net Assets | $119,163,861 | |
| (a) | Non-income producing investment. |
| (b) | Represents privately placed and other securities and instruments exempt from Securities and Exchange Commission registration (collectively, private placements), such as Section 4(a)(2) and Rule 144A eligible securities, which are often sold only to qualified institutional buyers. At March 31, 2021, the total value of these securities amounted to $1,298,221, which represents 1.09% of total net assets. |
| (c) | The rate shown is the seven-day current annualized yield at March 31, 2021. |
| (d) | As defined in the Investment Company Act of 1940, as amended, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the holdings and transactions in these affiliated companies during the period ended March 31, 2021 are as follows: |
| Affiliated issuers | Beginning of period($) | Purchases($) | Sales($) | Net change in unrealized appreciation (depreciation)($) | End of period($) | Realized gain (loss)($) | Dividends($) | End of period shares |
| Columbia Short-Term Cash Fund, 0.067% | ||||||||
| 2,989,602 | 16,057,847 | (14,292,076) | — | 4,755,373 | — | 728 | 4,755,848 | |
| GDR | Global Depositary Receipt |
| Columbia Acorn European FundSM | Quarterly Report 2021 | 17 |