8dd8346e7e40dcc

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

811-09645

Columbia Funds Series Trust

(Exact name of registrant as specified in charter)

290 Congress Street

Boston, MA 02210

(Address of principal executive offices) (Zip code)

Daniel J. Beckman

c/o Columbia Management Investment Advisers, LLC

290 Congress Street

Boston, MA 02210

Ryan C. Larrenaga, Esq.

c/o Columbia Management Investment Advisers, LLC

290 Congress Street

Boston, MA 02210

(Name and address of agent for service)

Registrant's telephone number, including area code:

(800) 345-6611

Date of fiscal year end:

Last Day of

February

Date of reporting period:

February 28, 2025

Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 100

F Street, NE, Washington, DC 20549. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Reports to Stockholders

Columbia Select Mid Cap Value Fund

Class A / CMUAX

Annual Shareholder Report | February 28, 2025

This annual shareholder report contains important information about Columbia Select Mid Cap Value Fund (the Fund) for the period of March 1, 2024 to February 28, 2025. You can find additional information about the Fund at

columbiathreadneedleus.com/resources/literature

. You can also request more information by contacting us at

1-800-345-6611.

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Class A	$ 119	1.13 %

Management's Discussion of Fund Performance

The performance of Class A shares for the period presented is shown in the Average Annual Total Returns table.

Top Performance Contributors

Stock selection

| Selections in the information technology, real estate and consumer discretionary sectors boosted the Fund’s relative results most during the annual period.

Allocations

| Larger allocations to the financials and utilities sectors, and smaller allocations to the health care and industrials sectors buoyed the Fund’s relative results during the annual period.

Individual holdings

| Positions in Entergy Corp., a utility company operating primarily in the southeast U.S.; Welltower, Inc., a real estate investment trust investing in health care infrastructure; Corning, Inc., a technology company specializing in glass, ceramics and related materials; Discover Financial Services, the owner and operator of Discover Bank which offers checking and saving accounts, loans, and credit cards; and Ameren Corp., a public utility company operating in the U.S., were among the top relative contributors to Fund performance.

Top Performance Detractors

Stock selection

| Selections in the energy, financials, and industrials sectors hurt the Fund’s relative results during the annual period.

Allocations

| Smaller weightings to real estate and energy modestly detracted from relative results.

Individual holdings

| Fund positions in Dollar Tree, Inc., a dollar store operator; ON Semiconductor Corp., a semiconductor company that provides intelligent sensing and power solutions; FMC Corp., an agricultural sciences company providing crop protection solutions; Marathon Petroleum Corp., a petroleum refining, marketing and transportation company; and Centene Corp., a health care company that serves as an intermediary for government-sponsored and privately insured health care programs, were among the top relative detractors during the period.

Fund Performance

The following shows the change in value of a hypothetical $10,000 investment in Class A shares of the Fund during the stated time period.

Growth of $10,000

Average Annual Total Returns (%)	1 year	5 years	10 years
Class A (excluding sales charges)	10.27	13.12	8.22
Class A (including sales charges)	3.91	11.78	7.58
Russell Midcap ® Value Index	11.67	11.68	8.00
Russell 3000 ® Index (a)	17.53	16.12	12.36

(a)

Effective August 1, 2024, the Fund compares its performance to the Russell 3000

Index, a broad-based performance index as required by new regulatory requirements. The Fund’s performance also continues to be compared to its prior benchmark, which management believes more closely represents the market sectors and/or asset classes in which the Fund primarily invests.

Past performance does not guarantee future performance

. Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares. Performance results reflect the effect of any fee waivers/expense reimbursements, if applicable. All results shown assume reinvestment of distributions. Visit

columbiathreadneedleus.com/investment-products/mutual-funds

for more recent performance information.

Key

Fund

Statistics

Fund net assets	$ 2,472,373,547
Total number of portfolio holdings	49
Management services fees (represents 0.73% of Fund average net assets)	$ 18,519,884
Portfolio turnover for the reporting period	10%

Graphical Representation of Fund

Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings

Welltower, Inc.	3.1 %
Entergy Corp.	3.2 %
Ameren Corp.	3.0 %
AMETEK, Inc.	2.8 %
Discover Financial Services	2.8 %
ITT, Inc.	2.8 %
Corning, Inc.	2.7 %
Southwest Airlines Co.	2.5 %
Marathon Petroleum Corp.	2.5 %
Ingersoll Rand, Inc.	2.5 %

Asset Categories

Graphical Representation - Allocation 1 Chart

Equity Sector Allocation

Graphical Representation - Allocation 2 Chart

Availability of Additional Information

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Select Mid Cap Value Fund

Class C / CMUCX

Annual Shareholder Report | February 28, 2025

columbiathreadneedleus.com/resources/literature

. You can also request more information by contacting us at

1-800-345-6611.

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Class C	$ 196	1.87 %

Management's Discussion of Fund Performance

The performance of Class C shares for the period presented is shown in the Average Annual Total Returns table.

Top Performance Contributors

Stock selection

| Selections in the information technology, real estate and consumer discretionary sectors boosted the Fund’s relative results most during the annual period.

Allocations

| Larger allocations to the financials and utilities sectors, and smaller allocations to the health care and industrials sectors buoyed the Fund’s relative results during the annual period.

Individual holdings

Top Performance Detractors

Stock selection

| Selections in the energy, financials, and industrials sectors hurt the Fund’s relative results during the annual period.

Allocations

| Smaller weightings to real estate and energy modestly detracted from relative results.

Individual holdings

Fund Performance

The following shows the change in value of a hypothetical $10,000 investment in Class C shares of the Fund during the stated time period.

Growth of $10,000

Average Annual Total Returns (%)	1 year	5 years	10 years
Class C (excluding sales charges)	9.44	12.27	7.41
Class C (including sales charges)	8.44	12.27	7.41
Russell Midcap ® Value Index	11.67	11.68	8.00
Russell 3000 ® Index (a)	17.53	16.12	12.36

(a)

Effective August 1, 2024, the Fund compares its performance to the Russell 3000

Past performance does not guarantee future performance

columbiathreadneedleus.com/investment-products/mutual-funds

for more recent performance information.

Key Fund Statistics

Fund net assets	$ 2,472,373,547
Total number of portfolio holdings	49
Management services fees (represents 0.73% of Fund average net assets)	$ 18,519,884
Portfolio turnover for the reporting period	10%

Graphical

Representation

of Fund

Holdings

Top Holdings

Welltower, Inc.	3.1 %
Entergy Corp.	3.2 %
Ameren Corp.	3.0 %
AMETEK, Inc.	2.8 %
Discover Financial Services	2.8 %
ITT, Inc.	2.8 %
Corning, Inc.	2.7 %
Southwest Airlines Co.	2.5 %
Marathon Petroleum Corp.	2.5 %
Ingersoll Rand, Inc.	2.5 %

Asset Categories

Equity Sector Allocation

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Select Mid Cap Value Fund

Institutional Class / NAMAX

Annual Shareholder Report | February 28, 2025

columbiathreadneedleus.com/resources/literature

. You can also request more information by contacting us at

1-800-345-6611.

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Institutional Class	$ 93	0.88 %

Management's Discussion of Fund Performance

The performance of Institutional Class shares for the period presented is shown in the Average Annual Total Returns table.

Top Performance Contributors

Stock selection

| Selections in the information technology, real estate and consumer discretionary sectors boosted the Fund’s relative results most during the annual period.

Allocations

| Larger allocations to the financials and utilities sectors, and smaller allocations to the health care and industrials sectors buoyed the Fund’s relative results during the annual period.

Individual holdings

Top Performance Detractors

Stock selection

| Selections in the energy, financials, and industrials sectors hurt the Fund’s relative results during the annual period.

Allocations

| Smaller weightings to real estate and energy modestly detracted from relative results.

Individual holdings

Fund Performance

The following shows the change in value of a hypothetical $10,000 investment in Institutional Class shares of the Fund during the stated time period.

Growth of $10,000

Average Annual Total Returns (%)	1 year	5 years	10 years
Institutional Class	10.58	13.39	8.49
Russell Midcap ® Value Index	11.67	11.68	8.00
Russell 3000 ® Index (a)	17.53	16.12	12.36

(a)

Effective August 1, 2024, the Fund compares its performance to the Russell 3000

Past performance does not guarantee future performance

columbiathreadneedleus.com/investment-products/mutual-funds

for more recent performance information.

Key Fund

Statistics

Fund net assets	$ 2,472,373,547
Total number of portfolio holdings	49
Management services fees (represents 0.73% of Fund average net assets)	$ 18,519,884
Portfolio turnover for the reporting period	10%

Graphical

Representation

of Fund

Holdings

Top Holdings

Welltower, Inc.	3.1 %
Entergy Corp.	3.2 %
Ameren Corp.	3.0 %
AMETEK, Inc.	2.8 %
Discover Financial Services	2.8 %
ITT, Inc.	2.8 %
Corning, Inc.	2.7 %
Southwest Airlines Co.	2.5 %
Marathon Petroleum Corp.	2.5 %
Ingersoll Rand, Inc.	2.5 %

Asset Categories

Equity Sector Allocation

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Select Mid Cap Value Fund

Institutional 2 Class / CVERX

Annual Shareholder Report | February 28, 2025

columbiathreadneedleus.com/resources/literature

. You can also request more information by contacting us at

1-800-345-6611.

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Institutional 2 Class	$ 84	0.80 %

Management's Discussion of Fund Performance

The performance of Institutional 2 Class shares for the period presented is shown in the Average Annual Total Returns table.

Top Performance Contributors

Stock selection

| Selections in the information technology, real estate and consumer discretionary sectors boosted the Fund’s relative results most during the annual period.

Allocations

| Larger allocations to the financials and utilities sectors, and smaller allocations to the health care and industrials sectors buoyed the Fund’s relative results during the annual period.

Individual holdings

Top Performance Detractors

Stock selection

| Selections in the energy, financials, and industrials sectors hurt the Fund’s relative results during the annual period.

Allocations

| Smaller weightings to real estate and energy modestly detracted from relative results.

Individual holdings

Fund Performance

The following shows the change in value of a hypothetical $10,000 investment in Institutional 2 Class shares of the Fund during the stated time period.

Growth of $10,000

Average Annual Total Returns (%)	1 year	5 years	10 years
Institutional 2 Class	10.69	13.51	8.61
Russell Midcap ® Value Index	11.67	11.68	8.00
Russell 3000 ® Index (a)	17.53	16.12	12.36

(a)

Effective August 1, 2024, the Fund compares its performance to the Russell 3000

Past performance does not guarantee future performance

columbiathreadneedleus.com/investment-products/mutual-funds

for more recent performance information.

Key Fund

Statistics

Fund net assets	$ 2,472,373,547
Total number of portfolio holdings	49
Management services fees (represents 0.73% of Fund average net assets)	$ 18,519,884
Portfolio turnover for the reporting period	10%

Graphical Representation of Fund

Holdings

Top Holdings

Welltower, Inc.	3.1 %
Entergy Corp.	3.2 %
Ameren Corp.	3.0 %
AMETEK, Inc.	2.8 %
Discover Financial Services	2.8 %
ITT, Inc.	2.8 %
Corning, Inc.	2.7 %
Southwest Airlines Co.	2.5 %
Marathon Petroleum Corp.	2.5 %
Ingersoll Rand, Inc.	2.5 %

Asset Categories

Equity Sector Allocation

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Select Mid Cap Value Fund

Institutional 3 Class / CMVYX

Annual Shareholder Report | February 28, 2025

columbiathreadneedleus.com/resources/literature

. You can also request more information by contacting us at

1-800-345-6611.

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Institutional 3 Class	$ 79	0.75 %

Management's Discussion of Fund Performance

The performance of Institutional 3 Class shares for the period presented is shown in the Average Annual Total Returns table.

Top Performance Contributors

Stock selection

| Selections in the information technology, real estate and consumer discretionary sectors boosted the Fund’s relative results most during the annual period.

Allocations

| Larger allocations to the financials and utilities sectors, and smaller allocations to the health care and industrials sectors buoyed the Fund’s relative results during the annual period.

Individual holdings

Top Performance Detractors

Stock selection

| Selections in the energy, financials, and industrials sectors hurt the Fund’s relative results during the annual period.

Allocations

| Smaller weightings to real estate and energy modestly detracted from relative results.

Individual holdings

Fund Performance

The following shows the change in value of a hypothetical $10,000 investment in Institutional 3 Class shares of the Fund during the stated time period.

Growth of $10,000

Average Annual Total Returns (%)	1 year	5 years	10 years
Institutional 3 Class	10.71	13.57	8.66
Russell Midcap® Value Index	11.67	11.68	8.00
Russell 3000 ® Index (a)	17.53	16.12	12.36

(a)

Effective August 1, 2024, the Fund compares its performance to the Russell 3000

Past performance does not guarantee future performance

columbiathreadneedleus.com/investment-products/mutual-funds

for more recent performance information.

Key Fund Stati

tics

Fund net assets	$ 2,472,373,547
Total number of portfolio holdings	49
Management services fees (represents 0.73% of Fund average net assets)	$ 18,519,884
Portfolio turnover for the reporting period	10%

Graphical

Representation

of Fund

Holdings

Top Holdings

Welltower, Inc.	3.1 %
Entergy Corp.	3.2 %
Ameren Corp.	3.0 %
AMETEK, Inc.	2.8 %
Discover Financial Services	2.8 %
ITT, Inc.	2.8 %
Corning, Inc.	2.7 %
Southwest Airlines Co.	2.5 %
Marathon Petroleum Corp.	2.5 %
Ingersoll Rand, Inc.	2.5 %

Asset Categories

Equity Sector Allocation

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Select Mid Cap Value Fund

Class R / CMVRX

Annual Shareholder Report | February 28, 2025

columbiathreadneedleus.com/resources/literature

. You can also request more information by contacting us at

1-800-345-6611.

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Class R	$ 145	1.38 %

Management's Discussion of Fund Performance

The performance of Class R shares for the period presented is shown in the Average Annual Total Returns table.

Top Performance Contributors

Stock selection

| Selections in the information technology, real estate and consumer discretionary sectors boosted the Fund’s relative results most during the annual period.

Allocations

| Larger allocations to the financials and utilities sectors, and smaller allocations to the health care and industrials sectors buoyed the Fund’s relative results during the annual period.

Individual holdings

Top Performance Detractors

Stock selection

| Selections in the energy, financials, and industrials sectors hurt the Fund’s relative results during the annual period.

Allocations

| Smaller weightings to real estate and energy modestly detracted from relative results.

Individual holdings

Fund Performance

The following shows the change in value of a hypothetical $10,000 investment in Class R shares of the Fund during the stated time period.

Growth of $10,000

Average Annual Total Returns (%)	1 year	5 years	10 years
Class R	10.06	12.83	7.95
Russell Midcap® Value Index	11.67	11.68	8.00
Russell 3000 ® Index (a)	17.53	16.12	12.36

(a)

Effective August 1, 2024, the Fund compares its performance to the Russell 3000

Past performance does not guarantee future performance

columbiathreadneedleus.com/investment-products/mutual-funds

for more recent performance information.

Key Fund Sta

stics

Fund net assets	$ 2,472,373,547
Total number of portfolio holdings	49
Management services fees (represents 0.73% of Fund average net assets)	$ 18,519,884
Portfolio turnover for the reporting period	10%

Graphical Representation of Fund

Holdings

The tables below show the invest

ent makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings

Welltower, Inc.	3.1 %
Entergy Corp.	3.2 %
Ameren Corp.	3.0 %
AMETEK, Inc.	2.8 %
Discover Financial Services	2.8 %
ITT, Inc.	2.8 %
Corning, Inc.	2.7 %
Southwest Airlines Co.	2.5 %
Marathon Petroleum Corp.	2.5 %
Ingersoll Rand, Inc.	2.5 %

Asset Categories

Equity Sector Allocation

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Select Mid Cap Value Fund

Class S / NAMBX

Annual Shareholder Report | February 28, 2025

This annual shareholder report contains important information about Columbia Select Mid Cap Value Fund (the Fund) for the period of October 2, 2024 to February 28, 2025. You can find additional information about the Fund at

columbiathreadneedleus.com/resources/literature

. You can also request more information by contacting us at

1-800-345-6611.

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Class S	$ 36 (a)	0.90 % (b)

(a)	Based on operations from October 2, 2024 (commencement of operations) through the stated period end. Had the class been open for the entire reporting period, expenses shown in the table above would have been higher.
(b)	Annualized.

Management's Discussion of Fund Performance

The performance of Class S shares for the period presented is shown in the Average Annual Total Returns table.

Top Performance Contributors

Stock selection

| Selections in the information technology, real estate and consumer discretionary sectors boosted the Fund’s relative results most during the annual period.

Allocations

| Larger allocations to the financials and utilities sectors, and smaller allocations to the health care and industrials sectors buoyed the Fund’s relative results during the annual period.

Individual holdings

Top Performance Detractors

Stock selection

| Selections in the energy, financials, and industrials sectors hurt the Fund’s relative results during the annual period.

Allocations

| Smaller weightings to real estate and energy modestly detracted from relative results.

Individual holdings

Fund Performance

The following shows the change in value of a hypothetical $10,000 investment in Class S shares of the Fund during the stated time period.

Growth of $10,000

Average Annual Total Returns (%)	1 year	5 years	10 years
Class S (a)	10.34	13.13	8.23
Russell Midcap® Value Index	11.67	11.68	8.00
Russell 3000 ® Index (b)	17.53	16.12	12.36

(a)	The returns shown for periods prior to October 2, 2024 (including Since Fund Inception returns, if shown) include the returns of Class A. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investment-products/mutual-funds/appended-performance for more information.
(b)	Effective August 1, 2024, the Fund compares its performance to the Russell 3000 ® Index, a broad-based performance index as required by new regulatory requirements. The Fund’s performance also continues to be compared to its prior benchmark, which management believes more closely represents the market sectors and/or asset classes in which the Fund primarily invests.

Past performance does not guarantee future performance

columbiathreadneedleus.com/investment-products/mutual-funds

for more recent performance information.

Key Fu

d Statistics

Fund net assets	$ 2,472,373,547
Total number of portfolio holdings	49
Management services fees (represents 0.73% of Fund average net assets)	$ 18,519,884
Portfolio turnover for the reporting period	10%

Graphical Representation of Fund

Holdings

The tables below show the investm

nt makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings

Welltower, Inc.	3.1 %
Entergy Corp.	3.2 %
Ameren Corp.	3.0 %
AMETEK, Inc.	2.8 %
Discover Financial Services	2.8 %
ITT, Inc.	2.8 %
Corning, Inc.	2.7 %
Southwest Airlines Co.	2.5 %
Marathon Petroleum Corp.	2.5 %
Ingersoll Rand, Inc.	2.5 %

Asset Categories

Equity Sector Allocation

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Select Mid Cap Value Fund | Class A

ASR197_01_(04/25)

Item 4. Principal Accountant Fees and Services.

The Registrant has engaged its principal accountant to perform audit services, audit-related services, tax services and other services during the past two fiscal years. The following table details the aggregate fees billed or expected to be billed for each of the last two fiscal years for the series of the relevant registrant whose reports to shareholders are included in this annual filing.

	Amount billed to the registrant ($)		Amount billed to the registrant's investment advisor ($)
	February 28, 2025	February 29, 2024	February 28, 2025	February 29, 2024
Audit fees ^(a)	31,523	30,993	0	0
Audit-related fees ^(b)	0	0	0	0
Tax fees ^(c)	15,345	12,850	0	0
All other fees ^(d)	0	0	0	0
Non-audit fees ^(g)	0	0	587,000	581,000

(a) Audit Fees include amounts related to the audit of the registrant’s annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years.

(b) Audit-Related Fees include amounts for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant’s financial statements and are not reported in Audit Fees above.

(c) Tax Fees include amounts for the review of annual tax returns, the review of required shareholder distribution calculations and typically include amounts for professional services by the principal accountant for tax compliance, tax advice, tax planning and foreign tax filings, if applicable.

(d) All Other Fees include amounts for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) above and typically include SOC-1 reviews.

(e)(1) Audit Committee Pre-Approval Policies and Procedures
The registrant’s Audit Committee is required to pre-approve the engagement of the registrant’s independent auditors to provide audit and non-audit services to the registrant and non-audit services to its investment adviser (excluding any sub-adviser whose role is primarily portfolio management and is sub-contracted or overseen by another investment adviser (the “Adviser”) or any entity controlling, controlled by or under common control with the Adviser that provides ongoing services to the Fund (a “Control Affiliate”) if the engagement relates directly to the operations and financial reporting of the registrant.

The Audit Committee has adopted a Policy for Engagement of Independent Auditors for Audit and Non-Audit Services (the “Policy”). The Policy sets forth the understanding of the Audit Committee regarding the engagement of the registrant’s independent accountants to provide (i) audit and permissible audit-related, tax and other services to the registrant (“Fund Services”); (ii) non-audit services to the registrant’s Adviser and any Control Affiliates, that relates directly to the operations and financial reporting of a Fund (“Fund-related Adviser Services”); and (iii) certain other audit and non-audit services to the registrant’s Adviser and its Control Affiliates. A service will require specific pre-approval by the Audit Committee if it is to be provided by the Fund’s independent auditor; provided, however, that pre-approval of non-audit services to the Fund, the Adviser or Control Affiliates may be waived if certain de minimis requirements set forth in the SEC’s rules are met.

Under the Policy, the Audit Committee may delegate pre-approval authority to any pre-designated member or members who are independent board members. The member(s) to whom such authority is delegated must report, for informational purposes only, any pre-approval decisions to the Audit Committee at its next regular meeting. The Audit Committee's responsibilities with respect to the pre-approval of services performed by the independent auditor may not be delegated to management.

On an annual basis, at a regularly scheduled Audit Committee meeting, the Fund’s Treasurer or other Fund officer shall submit to the Audit Committee a schedule of the types of Fund Services and Fund-related Adviser Services that are subject to specific pre-approval. This schedule will provide a description of each type of service that is subject to specific pre-approval, along with total projected fees for each service. The pre-approval will generally cover a one-year period. The Audit Committee will review and approve the types of services and the projected fees for the next one-year period and may add to, or subtract from, the list of pre-approved services from time to time, based on subsequent determinations. This specific approval acknowledges that the Audit Committee is in agreement with the specific types of services that the independent auditor will be permitted to perform and the projected fees for each service.

The Fund’s Treasurer or other Fund officer shall report to the Audit Committee at each of its regular meetings regarding all Fund Services or Fund-related Adviser Services provided since the last such report was rendered, including a description of the services, by category, with forecasted fees for the annual reporting period, proposed changes requiring specific pre-approval and a description of services provided by the independent auditor, by category, with actual fees during the current reporting period.

(e)(2) None, or 0%, of the Audit-Related Fees, Tax Fees and All Other Fees paid by the Fund or affiliated entities relating directly to the operations and financial reporting of the Registrant disclosed above were approved by the audit committee pursuant to paragraphs (c)(7)(i)(C) of Rule 2-01 of Regulation S-X (which permits audit committee approval after the start of the engagement with respect to services other than audit, review or attest services, if certain conditions are satisfied).

(f) Not applicable.

(g) The aggregate non-audit fees billed by the registrant’s accountant for services rendered to the registrant and rendered to the registrant’s investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant.

(h) The registrant’s Audit Committee of the Board of Directors has considered whether the provision of non-audit services that were rendered to the registrant’s adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X, is compatible with maintaining the principal accountant’s independence.

(i) Not applicable.

(j) Not applicable.

Portfolio of Investments

February 28, 2025

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 98.0%
Issuer	Shares	Value ($)
Communication Services 4.1%
Entertainment 2.3%
Take-Two Interactive Software, Inc.(a)	272,958	57,861,637
Media 1.8%
Nexstar Media Group, Inc., Class A	260,866	44,125,484
Total Communication Services		101,987,121
Consumer Discretionary 9.3%
Hotels, Restaurants & Leisure 2.0%
Hyatt Hotels Corp., Class A	350,258	49,368,865
Household Durables 1.5%
D.R. Horton, Inc.	292,364	37,074,679
Leisure Products 2.1%
Hasbro, Inc.	780,419	50,813,081
Specialty Retail 3.7%
Burlington Stores, Inc.(a)	158,813	39,596,845
O’Reilly Automotive, Inc.(a)	38,009	52,210,683
Total		91,807,528
Total Consumer Discretionary		229,064,153
Consumer Staples 4.9%
Consumer Staples Distribution & Retail 3.2%
Dollar Tree, Inc.(a)	248,865	18,132,304
U.S. Foods Holding Corp.(a)	859,090	61,579,571
Total		79,711,875
Food Products 1.7%
Tyson Foods, Inc., Class A	684,321	41,976,250
Total Consumer Staples		121,688,125
Energy 4.5%
Oil, Gas & Consumable Fuels 4.5%
Devon Energy Corp.	1,330,808	48,201,866
Marathon Petroleum Corp.	417,247	62,662,154
Total		110,864,020
Total Energy		110,864,020

Common Stocks (continued)
Issuer	Shares	Value ($)
Financials 19.9%
Banks 4.4%
Popular, Inc.	586,753	58,927,604
Regions Financial Corp.	2,158,592	51,180,216
Total		110,107,820
Capital Markets 1.9%
Carlyle Group, Inc. (The)	935,676	46,634,092
Consumer Finance 2.8%
Discover Financial Services	356,134	69,513,796
Financial Services 4.2%
Global Payments, Inc.	507,432	53,422,441
Voya Financial, Inc.	682,044	49,284,499
Total		102,706,940
Insurance 6.6%
Hanover Insurance Group, Inc. (The)	325,910	55,577,432
Kemper Corp.	751,391	50,779,004
Reinsurance Group of America, Inc.	282,919	57,344,852
Total		163,701,288
Total Financials		492,663,936
Health Care 8.4%
Health Care Equipment & Supplies 2.1%
Zimmer Biomet Holdings, Inc.	494,857	51,623,482
Health Care Providers & Services 4.7%
Centene Corp.(a)	608,981	35,418,335
Humana, Inc.	72,266	19,542,172
Quest Diagnostics, Inc.	358,563	61,995,543
Total		116,956,050
Life Sciences Tools & Services 1.6%
Agilent Technologies, Inc.	298,962	38,243,219
Total Health Care		206,822,751
Industrials 15.0%
Building Products 2.3%
Trane Technologies PLC	157,273	55,627,460
Electrical Equipment 2.8%
AMETEK, Inc.	369,707	69,985,535

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund | 2025

Portfolio of Investments (continued)

February 28, 2025

Common Stocks (continued)
Issuer	Shares	Value ($)
Machinery 5.3%
Ingersoll Rand, Inc.	736,744	62,461,157
ITT, Inc.	481,346	67,985,309
Total		130,446,466
Passenger Airlines 2.5%
Southwest Airlines Co.	2,017,681	62,669,172
Professional Services 2.1%
CACI International, Inc., Class A(a)	156,547	52,419,763
Total Industrials		371,148,396
Information Technology 8.8%
Communications Equipment 1.9%
Motorola Solutions, Inc.	106,841	47,033,545
Electronic Equipment, Instruments & Components 2.7%
Corning, Inc.	1,314,634	65,928,895
Semiconductors & Semiconductor Equipment 4.2%
Marvell Technology, Inc.	333,433	30,615,818
ON Semiconductor Corp.(a)	777,389	36,576,152
Teradyne, Inc.	329,868	36,239,299
Total		103,431,269
Total Information Technology		216,393,709
Materials 5.6%
Chemicals 2.0%
Chemours Co. LLC (The)	1,816,526	27,157,063
FMC Corp.	611,663	22,570,365
Total		49,727,428
Metals & Mining 3.6%
ATI, Inc.(a)	798,676	46,450,996
Freeport-McMoRan, Inc.	1,154,795	42,623,484
Total		89,074,480
Total Materials		138,801,908

Common Stocks (continued)
Issuer	Shares	Value ($)
Real Estate 9.8%
Health Care REITs 3.1%
Welltower, Inc.	505,272	77,564,305
Industrial REITs 2.3%
First Industrial Realty Trust, Inc.	980,833	55,985,947
Specialized REITs 4.4%
Gaming and Leisure Properties, Inc.	1,059,569	53,137,385
Lamar Advertising Co., Class A	453,985	56,398,557
Total		109,535,942
Total Real Estate		243,086,194
Utilities 7.7%
Electric Utilities 4.7%
Entergy Corp.	887,070	77,450,082
PG&E Corp.	2,294,595	37,493,682
Total		114,943,764
Multi-Utilities 3.0%
Ameren Corp.	731,693	74,310,741
Total Utilities		189,254,505
Total Common Stocks (Cost $1,461,245,372)		2,421,774,818

Money Market Funds 1.9%
	Shares	Value ($)
Columbia Short-Term Cash Fund, 4.479%(b),(c)	47,898,435	47,893,645
Total Money Market Funds (Cost $47,884,939)		47,893,645
Total Investments in Securities (Cost: $1,509,130,311)		2,469,668,463
Other Assets & Liabilities, Net		2,705,084
Net Assets		2,472,373,547

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund | 2025

Portfolio of Investments (continued)

February 28, 2025

Notes to Portfolio of Investments

(a)	Non-income producing investment.
(b)	The rate shown is the seven-day current annualized yield at February 28, 2025.
(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 year ended February 28, 2025 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, 4.479%
	17,727,786	264,842,666	(234,681,966 )	5,159	47,893,645	1,789	1,386,596	47,898,435

Fair value measurements

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’s 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 Investment Manager, 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.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as 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 may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. 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 Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of Columbia Management Investment Advisers, LLC report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The following table is a summary of the inputs used to value the Fund’s investments at February 28, 2025:

	Level 1 ($)	Level 2 ($)	Level 3 ($)	Total ($)
Investments in Securities
Common Stocks
Communication Services	101,987,121	—	—	101,987,121
Consumer Discretionary	229,064,153	—	—	229,064,153
Consumer Staples	121,688,125	—	—	121,688,125
Energy	110,864,020	—	—	110,864,020
Financials	492,663,936	—	—	492,663,936
Health Care	206,822,751	—	—	206,822,751
Industrials	371,148,396	—	—	371,148,396

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund | 2025

Statement of Operations

Year Ended February 28, 2025

Net investment income
Income:
Dividends — unaffiliated issuers	$43,715,820
Dividends — affiliated issuers	1,386,596
Foreign taxes withheld	(239,134 )
Total income	44,863,282
Expenses:
Management services fees	18,519,884
Distribution and/or service fees
Class A	2,582,468
Class C	77,865
Class R	120,090
Transfer agent fees
Class A	1,403,786
Advisor Class	166,638
Class C	10,587
Institutional Class	1,155,081
Institutional 2 Class	41,621
Institutional 3 Class	22,221
Class R	32,628
Class S	77,881
Custodian fees	14,693
Printing and postage fees	123,436
Registration fees	125,818
Accounting services fees	31,523
Legal fees	42,408
Compensation of chief compliance officer	469
Compensation of board members	37,683
Deferred compensation of board members	93,673
Other	53,012
Total expenses	24,733,465
Fees waived or expenses reimbursed by Investment Manager and its affiliates	(168,998 )
Expense reduction	(2,449 )
Total net expenses	24,562,018
Net investment income	20,301,264
Realized and unrealized gain (loss) — net
Net realized gain (loss) on:
Investments — unaffiliated issuers	172,741,485
Investments — affiliated issuers	1,789
Net realized gain	172,743,274
Net change in unrealized appreciation (depreciation) on:
Investments — unaffiliated issuers	60,524,817
Investments — affiliated issuers	5,159
Net change in unrealized appreciation (depreciation)	60,529,976
Net realized and unrealized gain	233,273,250
Net increase in net assets resulting from operations	$253,574,514

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund | 2025

Statement of Changes in Net Assets (continued)

	Year Ended		Year Ended
	February 28, 2025		February 29, 2024
	Shares	Dollars ($)	Shares	Dollars ($)
Capital stock activity
Class A
Shares sold	2,472,380	35,023,393	3,312,257	40,441,752
Distributions reinvested	4,477,992	63,768,951	1,003,353	12,117,607
Shares redeemed	(10,348,010 )	(146,275,313 )	(12,091,333 )	(146,928,747 )
Net decrease	(3,397,638 )	(47,482,969 )	(7,775,723 )	(94,369,388 )
Advisor Class
Shares sold	1,842,163	27,296,563	2,226,015	28,492,317
Distributions reinvested	209,885	3,027,582	176,643	2,238,000
Shares redeemed	(13,840,780 )	(219,826,930 )	(3,011,955 )	(38,353,005 )
Net decrease	(11,788,732 )	(189,502,785 )	(609,297 )	(7,622,688 )
Class C
Shares sold	83,216	1,031,181	117,561	1,260,896
Distributions reinvested	40,305	497,668	5,597	59,535
Shares redeemed	(232,431 )	(2,844,741 )	(351,978 )	(3,683,989 )
Net decrease	(108,910 )	(1,315,892 )	(228,820 )	(2,363,558 )
Institutional Class
Shares sold	17,800,781	267,412,440	6,071,425	73,643,491
Distributions reinvested	3,817,095	54,557,117	972,835	11,778,820
Shares redeemed	(22,452,912 )	(326,031,058 )	(13,103,702 )	(160,010,455 )
Net decrease	(835,036 )	(4,061,501 )	(6,059,442 )	(74,588,144 )
Institutional 2 Class
Shares sold	1,011,827	15,099,660	1,353,718	17,263,802
Distributions reinvested	281,834	4,226,511	111,183	1,405,264
Shares redeemed	(1,252,468 )	(18,497,866 )	(6,089,036 )	(77,857,208 )
Net increase (decrease)	41,193	828,305	(4,624,135 )	(59,188,142 )
Institutional 3 Class
Shares sold	4,856,040	68,544,509	7,163,339	86,878,242
Distributions reinvested	1,629,446	23,150,889	430,856	5,181,398
Shares redeemed	(6,501,952 )	(91,343,405 )	(13,623,027 )	(163,635,422 )
Net increase (decrease)	(16,466 )	351,993	(6,028,832 )	(71,575,782 )
Class R
Shares sold	435,203	6,106,140	361,207	4,389,397
Distributions reinvested	107,358	1,520,741	19,954	240,033
Shares redeemed	(490,354 )	(6,908,356 )	(700,456 )	(8,450,046 )
Net increase (decrease)	52,207	718,525	(319,295 )	(3,820,616 )
Class S
Shares sold	10,436,766	155,001,726	—	—
Distributions reinvested	483,721	7,018,788	—	—
Shares redeemed	(932,805 )	(13,385,856 )	—	—
Net increase	9,987,682	148,634,658	—	—
Total net decrease	(6,065,700 )	(91,829,666 )	(25,645,544 )	(313,528,318 )

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund | 2025

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 of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.

	Net asset value, beginning of period	Net investment income (loss)	Net realized and unrealized gain (loss)	Total from investment operations	Distributions from net investment income	Distributions from net realized gains	Total distributions to shareholders
Class A
Year Ended 2/28/2025	$13.39	0.09	1.30	1.39	(0.11 )	(0.83 )	(0.94 )
Year Ended 2/29/2024	$12.47	0.11	0.97	1.08	(0.10 )	(0.06 )	(0.16 )
Year Ended 2/28/2023	$13.54	0.08	(0.42 )	(0.34 )	(0.07 )	(0.66 )	(0.73 )
Year Ended 2/28/2022	$12.50	0.05	2.22	2.27	(0.04 )	(1.19 )	(1.23 )
Year Ended 2/28/2021	$9.76	0.05	3.04	3.09	(0.07 )	(0.28 )	(0.35 )
Class C
Year Ended 2/28/2025	$11.66	(0.01 )	1.13	1.12	(0.01 )	(0.83 )	(0.84 )
Year Ended 2/29/2024	$10.88	0.02	0.83	0.85	(0.01 )	(0.06 )	(0.07 )
Year Ended 2/28/2023	$11.92	(0.01 )	(0.37 )	(0.38 )	—	(0.66 )	(0.66 )
Year Ended 2/28/2022	$11.18	(0.05 )	1.98	1.93	—	(1.19 )	(1.19 )
Year Ended 2/28/2021	$8.76	(0.01 )	2.72	2.71	(0.01 )	(0.28 )	(0.29 )
Institutional Class
Year Ended 2/28/2025	$13.44	0.13	1.30	1.43	(0.14 )	(0.83 )	(0.97 )
Year Ended 2/29/2024	$12.53	0.14	0.96	1.10	(0.13 )	(0.06 )	(0.19 )
Year Ended 2/28/2023	$13.59	0.11	(0.41 )	(0.30 )	(0.10 )	(0.66 )	(0.76 )
Year Ended 2/28/2022	$12.55	0.08	2.22	2.30	(0.07 )	(1.19 )	(1.26 )
Year Ended 2/28/2021	$9.80	0.09	3.03	3.12	(0.09 )	(0.28 )	(0.37 )
Institutional 2 Class
Year Ended 2/28/2025	$14.07	0.14	1.38	1.52	(0.16 )	(0.83 )	(0.99 )
Year Ended 2/29/2024	$13.11	0.16	1.00	1.16	(0.14 )	(0.06 )	(0.20 )
Year Ended 2/28/2023	$14.18	0.13	(0.42 )	(0.29 )	(0.12 )	(0.66 )	(0.78 )
Year Ended 2/28/2022	$13.05	0.10	2.31	2.41	(0.09 )	(1.19 )	(1.28 )
Year Ended 2/28/2021	$10.17	0.10	3.17	3.27	(0.11 )	(0.28 )	(0.39 )
Institutional 3 Class
Year Ended 2/28/2025	$13.38	0.14	1.30	1.44	(0.16 )	(0.83 )	(0.99 )
Year Ended 2/29/2024	$12.46	0.16	0.97	1.13	(0.15 )	(0.06 )	(0.21 )
Year Ended 2/28/2023	$13.53	0.13	(0.42 )	(0.29 )	(0.12 )	(0.66 )	(0.78 )
Year Ended 2/28/2022	$12.50	0.10	2.21	2.31	(0.09 )	(1.19 )	(1.28 )
Year Ended 2/28/2021	$9.76	0.09	3.04	3.13	(0.11 )	(0.28 )	(0.39 )

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund | 2025

Financial Highlights (continued)

	Net asset value, end of period	Total return	Total gross expense ratio to average net assets(a)	Total net expense ratio to average net assets(a),(b)	Net investment income (loss) ratio to average net assets	Portfolio turnover	Net assets, end of period (000’s)
Class A
Year Ended 2/28/2025	$13.84	10.27%	1.13%	1.13% (c)	0.64%	10%	$997,414
Year Ended 2/29/2024	$13.39	8.79%	1.15%	1.12% (c)	0.91%	15%	$1,010,326
Year Ended 2/28/2023	$12.47	(1.90% )	1.14%	1.12% (c)	0.67%	30%	$1,038,459
Year Ended 2/28/2022	$13.54	18.15%	1.13%	1.13% (c)	0.35%	37%	$1,142,075
Year Ended 2/28/2021	$12.50	33.20%	1.18%	1.15% (c)	0.54%	44%	$1,003,004
Class C
Year Ended 2/28/2025	$11.94	9.44%	1.88%	1.87% (c)	(0.11% )	10%	$7,255
Year Ended 2/29/2024	$11.66	7.90%	1.90%	1.87% (c)	0.15%	15%	$8,353
Year Ended 2/28/2023	$10.88	(2.56% )	1.89%	1.87% (c)	(0.07% )	30%	$10,281
Year Ended 2/28/2022	$11.92	17.19%	1.88%	1.88% (c)	(0.39% )	37%	$12,830
Year Ended 2/28/2021	$11.18	32.30%	1.94%	1.90% (c)	(0.12% )	44%	$12,577
Institutional Class
Year Ended 2/28/2025	$13.90	10.58%	0.88%	0.88% (c)	0.89%	10%	$860,455
Year Ended 2/29/2024	$13.44	8.95%	0.90%	0.87% (c)	1.16%	15%	$843,358
Year Ended 2/28/2023	$12.53	(1.56% )	0.89%	0.87% (c)	0.92%	30%	$861,739
Year Ended 2/28/2022	$13.59	18.36%	0.89%	0.88% (c)	0.60%	37%	$861,576
Year Ended 2/28/2021	$12.55	33.52%	0.94%	0.90% (c)	0.91%	44%	$703,152
Institutional 2 Class
Year Ended 2/28/2025	$14.60	10.69%	0.81%	0.80%	0.96%	10%	$70,788
Year Ended 2/29/2024	$14.07	9.04%	0.81%	0.78%	1.23%	15%	$67,666
Year Ended 2/28/2023	$13.11	(1.47% )	0.81%	0.77%	1.02%	30%	$123,621
Year Ended 2/28/2022	$14.18	18.47%	0.80%	0.78%	0.70%	37%	$130,351
Year Ended 2/28/2021	$13.05	33.75%	0.84%	0.79%	0.96%	44%	$103,360
Institutional 3 Class
Year Ended 2/28/2025	$13.83	10.71%	0.75%	0.75%	1.01%	10%	$373,399
Year Ended 2/29/2024	$13.38	9.24%	0.76%	0.73%	1.29%	15%	$361,466
Year Ended 2/28/2023	$12.46	(1.50% )	0.75%	0.73%	1.05%	30%	$411,996
Year Ended 2/28/2022	$13.53	18.53%	0.75%	0.74%	0.73%	37%	$434,024
Year Ended 2/28/2021	$12.50	33.80%	0.79%	0.75%	0.94%	44%	$369,599

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund | 2025

Financial Highlights (continued)

	Net asset value, beginning of period	Net investment income (loss)	Net realized and unrealized gain (loss)	Total from investment operations	Distributions from net investment income	Distributions from net realized gains	Total distributions to shareholders
Class R
Year Ended 2/28/2025	$13.30	0.05	1.30	1.35	(0.07 )	(0.83 )	(0.90 )
Year Ended 2/29/2024	$12.40	0.08	0.95	1.03	(0.07 )	(0.06 )	(0.13 )
Year Ended 2/28/2023	$13.46	0.05	(0.41 )	(0.36 )	(0.04 )	(0.66 )	(0.70 )
Year Ended 2/28/2022	$12.44	0.01	2.21	2.22	(0.01 )	(1.19 )	(1.20 )
Year Ended 2/28/2021	$9.71	0.04	3.02	3.06	(0.05 )	(0.28 )	(0.33 )
Class S
Year Ended 2/28/2025(d)	$14.77	0.04	(0.21 )(e)	(0.17 )	(0.03 )	(0.67 )	(0.70 )

Notes to Financial Highlights
(a)	In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b)	Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c)	The benefits derived from expense reductions had an impact of less than 0.01%.
(d)	Class S shares commenced operations on October 2, 2024. Per share data and total return reflect activity from that date.
(e)	Calculation of the net gain (loss) per share (both realized and unrealized) does not correlate to the aggregate realized and unrealized gain (loss) presented in the Statement of Operations due to timing of Fund shares sold and redeemed in relation to fluctuations in the market value of the portfolio.

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund | 2025

Notes to Financial Statements

February 28, 2025

Note 1. Organization

Columbia Select Mid Cap Value Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 8 years. Institutional Class, Institutional 2 Class, Institutional 3 Class, Class R and Class S shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus. Class S shares commenced operations on October 2, 2024.

The Board of Trustees of the Fund approved a proposal to permit the exchange of Institutional Class shares held by certain financial intermediaries and omnibus group retirement plans, with specific permission from Columbia Management Investment Distributors, Inc., for newly created Class S shares. Effective on October 4, 2024, shares held by those certain Institutional Class shareholders of the Fund were exchanged for Class S shares of the Fund. This was a tax-free transaction for existing Institutional Class shareholders.

In addition, the Board of Trustees of the Fund approved the conversion of all Advisor Class shares of the Fund to Institutional Class shares of the Fund and the subsequent elimination of Advisor Class shares. Effective on November 22, 2024, Advisor Class shares of the Fund were converted to Institutional Class shares of the Fund. This was a tax-free transaction for existing Advisor Class shareholders.

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

In this reporting period, the Fund adopted FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) – Improvements to Reportable Segment Disclosures (ASU 2023-07). Adoption of the new standard impacted financial statement disclosures only and did not affect the Fund’s financial position or its results of operations. The intent of the ASU 2023-07 is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures.

The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the

Columbia Select Mid Cap Value Fund | 2025

Notes to Financial Statements (continued)

February 28, 2025

CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)), are valued at the latest net asset value reported by those companies as of the valuation time.

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires 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. This information is disclosed following the Fund’s Portfolio of Investments.

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported,

Columbia Select Mid Cap Value Fund | 2025

Notes to Financial Statements (continued)

February 28, 2025

estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Foreign taxes

The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability in the Statement of Assets and Liabilities.

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid each calendar quarter. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. 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.

Recent accounting pronouncements and regulatory updates

Accounting Standards Update 2023-09 Income Taxes (Topic 740)

Columbia Select Mid Cap Value Fund | 2025

Notes to Financial Statements (continued)

February 28, 2025

In December 2023, the FASB issued Accounting Standards Update No. 2023-09 Income Taxes (Topic 740) Improvements to Income Tax Disclosures. The amendments were issued to enhance the transparency and decision usefulness of income tax disclosures primarily related to rate reconciliation and income taxes paid information. The amendments are effective for annual periods beginning after December 15, 2024, with early adoption permitted. Management expects that the adoption of the amendments will not have a material impact on its financial statements.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.82% to 0.65% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 28, 2025 was 0.73% of the Fund’s average daily net assets.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.

Columbia Select Mid Cap Value Fund | 2025

Notes to Financial Statements (continued)

February 28, 2025

For the year ended February 28, 2025, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:

	Effective rate (%)
Class A	0.14
Advisor Class	0.10 (a)
Class C	0.14
Institutional Class	0.14
Institutional 2 Class	0.06
Institutional 3 Class	0.01
Class R	0.14
Class S	0.13 (b)

(a)	Unannualized.
(b)	Annualized.

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 28, 2025, these minimum account balance fees reduced total expenses of the Fund by $2,449.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.

Sales charges (unaudited)

Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the year ended February 28, 2025, if any, are listed below:

	Front End (%)	CDSC (%)	Amount ($)
Class A	5.75	0.50 - 1.00 (a)	200,853
Class C	—	1.00 (b)	156

(a)	This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b)	This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.

The Fund’s other share classes are not subject to sales charges.

Columbia Select Mid Cap Value Fund | 2025

Notes to Financial Statements (continued)

February 28, 2025

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets:

	July 1, 2024 through June 30, 2025 (%)	Prior to July 1, 2024 (%)
Class A	1.16	1.13
Class C	1.91	1.88
Institutional Class	0.91	0.88
Institutional 2 Class	0.83	0.78
Institutional 3 Class	0.78	0.73
Class R	1.41	1.38
Class S	0.91	—

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. In addition to the contractual agreement, the Investment Manager and certain of its affiliates have voluntarily agreed to waive fees and/or reimburse Fund expenses (excluding certain fees and expenses described above) so that Fund level expenses (expenses directly attributable to the Fund and not to a specific share class) are waived proportionately across all share classes. This arrangement may be revised or discontinued at any time. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At February 28, 2025, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation and earnings and profits distributed to shareholders on the redemption of shares. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.

The following reclassifications were made:

Undistributed net investment income ($)	Accumulated net realized gain ($)	Paid in capital ($)
—	(8,085,000 )	8,085,000

Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.

Columbia Select Mid Cap Value Fund | 2025

Notes to Financial Statements (continued)

February 28, 2025

The tax character of distributions paid during the years indicated was as follows:

Year Ended February 28, 2025			Year Ended February 29, 2024
Ordinary income ($)	Long-term capital gains ($)	Total ($)	Ordinary income ($)	Long-term capital gains ($)	Total ($)
24,135,605	144,990,390	169,125,995	24,400,002	11,199,226	35,599,228

Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.

At February 28, 2025, the components of distributable earnings on a tax basis were as follows:

Undistributed ordinary income ($)	Undistributed long-term capital gains ($)	Capital loss carryforwards ($)	Net unrealized appreciation ($)
1,189,729	45,727,154	—	931,335,046

At February 28, 2025, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:

Federal tax cost ($)	Gross unrealized appreciation ($)	Gross unrealized (depreciation) ($)	Net unrealized appreciation ($)
1,538,333,417	1,011,703,394	(80,368,348 )	931,335,046

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $240,785,519 and $507,892,286, respectively, for the year ended February 28, 2025. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Columbia Select Mid Cap Value Fund | 2025

Notes to Financial Statements (continued)

February 28, 2025

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund did not borrow or lend money under the Interfund Program during the year ended February 28, 2025.

Note 8. Line of credit

The Fund has access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. Pursuant to an October 24, 2024 amendment and restatement, the credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits aggregate borrowings up to $900 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case. 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 unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to the October 24, 2024 amendment and restatement, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A. which permitted collective borrowings up to $900 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the year ended February 28, 2025.

Note 9. Significant risks

Market risk

The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect the Fund’s ability to price or value hard-to-value assets in thinly traded and closed markets and could cause significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

Shareholder concentration risk

At February 28, 2025, affiliated shareholders of record owned 20.7% of the outstanding shares of the Fund in one or more accounts. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Columbia Select Mid Cap Value Fund | 2025

Notes to Financial Statements (continued)

February 28, 2025

Small- and mid-cap company risk

Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies. Securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is 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 Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) 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 Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

Columbia Select Mid Cap Value Fund | 2025

Report of Independent Registered Public Accounting Firm

To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Select Mid Cap Value Fund

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Select Mid Cap Value Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 28, 2025, the related statement of operations for the year ended February 28, 2025, the statement of changes in net assets for each of the two years in the period ended February 28, 2025, including the related notes, and the financial highlights for each of the periods indicated therein (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 28, 2025, 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 ended February 28, 2025 and the financial highlights for each of the periods indicated therein in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 28, 2025 by correspondence with the custodian and transfer agent. We believe that our audits provide a reasonable basis for our opinion.

/s/PricewaterhouseCoopers LLP

Minneapolis, Minnesota

April 22, 2025

We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.

Columbia Select Mid Cap Value Fund | 2025

Assets
Investments in securities, at value
Unaffiliated issuers (cost $1,461,245,372)	$2,421,774,818
Affiliated issuers (cost $47,884,939)	47,893,645
Receivable for:
Capital shares sold	1,326,123
Dividends	3,729,926
Prepaid expenses	9,866
Other assets	9,702
Total assets	2,474,744,080
Liabilities
Payable for:
Capital shares redeemed	1,464,557
Management services fees	48,851
Distribution and/or service fees	7,268
Transfer agent fees	290,060
Compensation of chief compliance officer	469
Compensation of board members	4,340
Other expenses	68,509
Deferred compensation of board members	486,479
Total liabilities	2,370,533
Net assets applicable to outstanding capital stock	$2,472,373,547
Represented by
Paid in capital	1,494,608,098
Total distributable earnings (loss)	977,765,449
Total - representing net assets applicable to outstanding capital stock	$2,472,373,547

Class A
Net assets	$997,413,678
Shares outstanding	72,070,956
Net asset value per share	$13.84
Maximum sales charge	5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares)	$14.68
Class C
Net assets	$7,254,582
Shares outstanding	607,579
Net asset value per share	$11.94
Institutional Class
Net assets	$860,455,414
Shares outstanding	61,897,573
Net asset value per share	$13.90
Institutional 2 Class
Net assets	$70,788,322
Shares outstanding	4,848,902
Net asset value per share	$14.60
Institutional 3 Class
Net assets	$373,399,002
Shares outstanding	27,008,107
Net asset value per share	$13.83
Class R
Net assets	$24,201,300
Shares outstanding	1,760,555
Net asset value per share	$13.75
Class S
Net assets	$138,861,249
Shares outstanding	9,987,682
Net asset value per share	$13.90

	Year Ended February 28, 2025	Year Ended February 29, 2024
Operations
Net investment income	$20,301,264	$25,819,811
Net realized gain	172,743,274	42,527,681
Net change in unrealized appreciation (depreciation)	60,529,976	126,879,159
Net increase in net assets resulting from operations	253,574,514	195,226,651
Distributions to shareholders
Net investment income and net realized gains
Class A	(67,184,595 )	(12,742,783 )
Advisor Class	(3,064,955 )	(2,261,567 )
Class C	(510,821 )	(61,343 )
Institutional Class	(59,079,425 )	(12,687,148 )
Institutional 2 Class	(4,726,146 )	(1,550,616 )
Institutional 3 Class	(26,019,854 )	(6,055,643 )
Class R	(1,521,411 )	(240,128 )
Class S	(7,018,788 )	—
Total distributions to shareholders	(169,125,995 )	(35,599,228 )
Decrease in net assets from capital stock activity	(91,829,666 )	(313,528,318 )
Total decrease in net assets	(7,381,147 )	(153,900,895 )
Net assets at beginning of year	2,479,754,694	2,633,655,589
Net assets at end of year	$2,472,373,547	$2,479,754,694

Portfolio of Investments	3
Statement of Assets and Liabilities	7
Statement of Operations	9
Statement of Changes in Net Assets	10
Financial Highlights	12
Notes to Financial Statements	16
Report of Independent Registered Public Accounting Firm	25
Federal Income Tax Information	26

Qualified dividend income	Dividends received deduction	Capital gain dividend
100.00%	100.00%	$180,062,348

(registrant)	Columbia Funds Series Trust

By (Signature and Title)	/s/ Daniel J. Beckman
	Daniel J. Beckman, President and Principal Executive Officer

Date	April 22, 2025