497

The interactive data file included as an exhibit to this filing relates to the supplement to the prospectuses for Columbia Mid Cap Index Fund filed pursuant to Rule 497(e) under the Securities Act of 1933, as amended, on November 16, 2012 (Accession No. 0001193125-12-473545), which is incorporated herein by reference.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Document Type

dei_DocumentType

Other

Document Period End Date

dei_DocumentPeriodEndDate

Feb. 29, 2012

Registrant Name

dei_EntityRegistrantName

COLUMBIA FUNDS SERIES TRUST

Central Index Key

dei_EntityCentralIndexKey

0001097519

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Nov. 16, 2012

Document Effective Date

dei_DocumentEffectiveDate

Nov. 16, 2012

Prospectus Date

rr_ProspectusDate

Nov. 16, 2012

(Columbia Mid Cap Index Fund Class I) | (Columbia Mid Cap Index Fund)

Risk/Return:

rr_RiskReturnAbstract

Columbia Mid Cap Index Fund Class I - Supplement [Text Block]

columbia_SupplementTextBlock

COLUMBIA FUNDS SERIES TRUST

Columbia Mid Cap Index Fund

(the "Fund")

Supplement dated November 16, 2012 to

the Fund's prospectus dated July 1, 2012, as supplemented

The Fund's prospectus offering Class A and Class I shares is revised and supplemented as follows:

The section of the Fund's prospectus entitled "Fees and Expenses of the Fund" is modified by deleting the Class I column of the table entitled "Annual Fund Operating Expenses" and the Class I row of the expense example table in the subsection entitled "Example" and replacing them with the following:

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2013-11-15

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

(Columbia Mid Cap Index Fund Class I) | (Columbia Mid Cap Index Fund) | Class I Shares

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.20%

Distribution and/or service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.02%

^[1]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total annual Fund operating expenses

rr_ExpensesOverAssets

0.23%

Fee waivers and/or reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

^[3]

Total annual Fund operating expenses after fee waivers and/or reimbursements

rr_NetExpensesOverAssets

0.21%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

22

^[5]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

72

^[5]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

127

^[5]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

291

^[5]

(Columbia Mid Cap Index Fund Class R5) | (Columbia Mid Cap Index Fund)

Risk/Return:

rr_RiskReturnAbstract

Columbia Mid Cap Index Fund Class R5 - Supplement [Text Block]

columbia_SupplementTextBlock_01

COLUMBIA FUNDS SERIES TRUST

Columbia Mid Cap Index Fund

(the "Fund")

Supplement dated November 16, 2012 to

the Fund's prospectus dated November 8, 2012

The Fund's prospectus offering Class R5 shares is revised and supplemented as follows:

The section of the Fund's prospectus entitled "Fees and Expenses of the Fund" is modified by deleting the table entitled "Annual Fund Operating Expenses" and the expense example table in the subsection entitled "Example" and replacing them with the following:

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2013-11-15

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

(Columbia Mid Cap Index Fund Class R5) | (Columbia Mid Cap Index Fund) | Class R5 Shares

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.20%

Distribution and/or service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.07%

^[2]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total annual Fund operating expenses

rr_ExpensesOverAssets

0.28%

Fee waivers and/or reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.07%)

^[4]

Total annual Fund operating expenses after fee waivers and/or reimbursements

rr_NetExpensesOverAssets

0.21%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

22

^[5]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

83

^[5]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

150

^[5]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

349

^[5]

[1] Other expenses have been restated to reflect contractual changes to certain fees paid by the Fund.

[2] Other expenses are based on estimated amounts for the current fiscal year.

[3] Columbia Management Investment Advisers, LLC (the Investment Manager) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until November 15, 2013, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rate of 0.20% for Class I.

[4] Columbia Management Investment Advisers, LLC (the Investment Manager) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until November 15, 2013, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rate of 0.20% for Class R5.

[5] The waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire on November 15, 2013 and are only reflected in the 1 year example and the first year of the 3, 5 and 10 year examples.

XML

(Columbia Mid Cap Index Fund Class I) | (Columbia Mid Cap Index Fund)

COLUMBIA FUNDS SERIES TRUST

Columbia Mid Cap Index Fund

(the "Fund")

Supplement dated November 16, 2012 to

the Fund's prospectus dated July 1, 2012, as supplemented

The Fund's prospectus offering Class A and Class I shares is revised and supplemented as follows:

The section of the Fund's prospectus entitled "Fees and Expenses of the Fund" is modified by deleting the Class I column of the table entitled "Annual Fund Operating Expenses" and the Class I row of the expense example table in the subsection entitled "Example" and replacing them with the following:

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Columbia Mid Cap Index Fund)		Class I Shares (Columbia Mid Cap Index Fund Class I)
Management fees		0.20%
Distribution and/or service (Rule 12b-1) fees		none
Other expenses	[1]	0.02%
Acquired fund fees and expenses		0.01%
Total annual Fund operating expenses		0.23%
Fee waivers and/or reimbursements	[2]	(0.02%)
Total annual Fund operating expenses after fee waivers and/or reimbursements		0.21%

Example

Expense Example (Columbia Mid Cap Index Fund) (USD $)		1 Year	3 Years	5 Years	10 Years
Class I Shares (Columbia Mid Cap Index Fund Class I)	[1]	22	72	127	291

[1] Other expenses have been restated to reflect contractual changes to certain fees paid by the Fund.

[2] Columbia Management Investment Advisers, LLC (the Investment Manager) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until November 15, 2013, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rate of 0.20% for Class I.

[1] The waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire on November 15, 2013 and are only reflected in the 1 year example and the first year of the 3, 5 and 10 year examples.

XML

(Columbia Mid Cap Index Fund Class R5) | (Columbia Mid Cap Index Fund)

COLUMBIA FUNDS SERIES TRUST

Columbia Mid Cap Index Fund

(the "Fund")

Supplement dated November 16, 2012 to

the Fund's prospectus dated November 8, 2012

The Fund's prospectus offering Class R5 shares is revised and supplemented as follows:

The section of the Fund's prospectus entitled "Fees and Expenses of the Fund" is modified by deleting the table entitled "Annual Fund Operating Expenses" and the expense example table in the subsection entitled "Example" and replacing them with the following:

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Columbia Mid Cap Index Fund)		Class R5 Shares (Columbia Mid Cap Index Fund Class R5)
Management fees		0.20%
Distribution and/or service (Rule 12b-1) fees		none
Other expenses	[1]	0.07%
Acquired fund fees and expenses		0.01%
Total annual Fund operating expenses		0.28%
Fee waivers and/or reimbursements	[2]	(0.07%)
Total annual Fund operating expenses after fee waivers and/or reimbursements		0.21%

Example

Expense Example (Columbia Mid Cap Index Fund) (USD $)		1 Year	3 Years	5 Years	10 Years
Class R5 Shares (Columbia Mid Cap Index Fund Class R5)	[1]	22	83	150	349

[1] Other expenses are based on estimated amounts for the current fiscal year.

[2] Columbia Management Investment Advisers, LLC (the Investment Manager) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until November 15, 2013, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rate of 0.20% for Class R5.

[1] The waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire on November 15, 2013 and are only reflected in the 1 year example and the first year of the 3, 5 and 10 year examples.

XML

COLUMBIA FUNDS SERIES TRUST

Columbia Mid Cap Index Fund

(the "Fund")

Supplement dated November 16, 2012 to

the Fund's prospectus dated July 1, 2012, as supplemented

The Fund's prospectus offering Class A and Class I shares is revised and supplemented as follows:

The section of the Fund's prospectus entitled "Fees and Expenses of the Fund" is modified by deleting the Class I column of the table entitled "Annual Fund Operating Expenses" and the Class I row of the expense example table in the subsection entitled "Example" and replacing them with the following:

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

	Class I Shares
Management fees		0.20	%
Distribution and/or service (Rule 12b-1) fees		0.00	%
Other expenses(a)		0.02	%
Acquired fund fees and expenses		0.01	%
Total annual Fund operating expenses		0.23	%
Fee waivers and/or reimbursements(b)		-0.02	%
Total annual Fund operating expenses after fee waivers and/or reimbursements		0.21	%

^(a) Other expenses have been restated to reflect contractual changes to certain fees paid by the Fund.

^(b) Columbia Management Investment Advisers, LLC (the Investment Manager) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until November 15, 2013, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rate of 0.20% for Class I.

Example

	1 year*		3 years*		5 years*		10 years*
Class I Shares	$	22	$	72	$	127	$	291

* The waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire on November 15, 2013 and are only reflected in the 1 year example and the first year of the 3, 5 and 10 year examples.

COLUMBIA FUNDS SERIES TRUST

Columbia Mid Cap Index Fund

(the "Fund")

Supplement dated November 16, 2012 to

the Fund's prospectus dated November 8, 2012

The Fund's prospectus offering Class R5 shares is revised and supplemented as follows:

The section of the Fund's prospectus entitled "Fees and Expenses of the Fund" is modified by deleting the table entitled "Annual Fund Operating Expenses" and the expense example table in the subsection entitled "Example" and replacing them with the following:

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

	Class R5 Shares
Management fees		0.20	%
Distribution and/or service (Rule 12b-1) fees		0.00	%
Other expenses(a)		0.07	%
Acquired fund fees and expenses		0.01	%
Total annual Fund operating expenses		0.28	%
Fee waivers and/or reimbursements(b)		-0.07	%
Total annual Fund operating expenses after fee waivers and/or reimbursements		0.21	%

^(a) Other expenses are based on estimated amounts for the current fiscal year.

^(b) Columbia Management Investment Advisers, LLC (the Investment Manager) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until November 15, 2013, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rate of 0.20% for Class R5.

Example

	1 year*		3 years*		5 years*		10 years*
Class R5 Shares	$	22	$	83	$	150	$	349

* The waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire on November 15, 2013 and are only reflected in the 1 year example and the first year of the 3, 5 and 10 year examples.

XML

Annual Fund Operating Expenses ((Columbia Mid Cap Index Fund))	0 Months Ended
	Nov. 16, 2012
(Columbia Mid Cap Index Fund Class I) | Class I Shares
Operating Expenses:
Management fees	0.20%
Distribution and/or service (Rule 12b-1) fees	none
Other expenses	0.02%	[1]
Acquired fund fees and expenses	0.01%
Total annual Fund operating expenses	0.23%
Fee waivers and/or reimbursements	(0.02%)	[2]
Total annual Fund operating expenses after fee waivers and/or reimbursements	0.21%
(Columbia Mid Cap Index Fund Class R5) | Class R5 Shares
Operating Expenses:
Management fees	0.20%
Distribution and/or service (Rule 12b-1) fees	none
Other expenses	0.07%	[3]
Acquired fund fees and expenses	0.01%
Total annual Fund operating expenses	0.28%
Fee waivers and/or reimbursements	(0.07%)	[4]
Total annual Fund operating expenses after fee waivers and/or reimbursements	0.21%

[1] Other expenses have been restated to reflect contractual changes to certain fees paid by the Fund.

[2] Columbia Management Investment Advisers, LLC (the Investment Manager) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until November 15, 2013, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rate of 0.20% for Class I.

[3] Other expenses are based on estimated amounts for the current fiscal year.

[4] Columbia Management Investment Advisers, LLC (the Investment Manager) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until November 15, 2013, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses, subject to applicable exclusions, will not exceed the annual rate of 0.20% for Class R5.