497

THRIVENTSERIES FUND, INC.
625 Fourth Avenue South
Minneapolis, MN 55415

November 5, 2018

VIA EDGAR

EDGAR Operations Branch
United States Securities and Exchange Commission
Division of Investment Management
100 F Street, NE
Washington, DC 20549

RE: XBRL Supplement of Thrivent Series Fund, Inc. (the “Registrant”)

Ladies and Gentlemen:

Attached for filing is a supplement with an effective date of October 31, 2018, in XBRL format, to the Registrant’s prospectus dated April 30, 2018. If you have any questions or comments, please feel free to contact me at (612) 844-4198.

Sincerely,

/s/ Michael W. Kremenak

Michael W. Kremenak

Secretary and Chief Legal Officer

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Apr. 30, 2018

Thrivent Series Fund, Inc.

Supplement to

Prospectus, Thrivent Balanced Income Plus Portfolio Summary Prospectus,

and Thrivent Diversified Income Plus Portfolio Summary Prospectus

each dated April 30, 2018

2. The following replaces the first paragraph in the “Summary Section” under the heading “Principal Strategies” for Thrivent Diversified Income Plus Portfolio:

Under normal circumstances, the Portfolio invests in a combination of equity securities and debt securities within the ranges shown in the following table:

Broad Asset Category	Target Allocation			Allocation Range
Debt Securities		75	%		55-95	%
Equity Securities		25	%		5-45	%

3. The following replaces the second paragraph in the “Summary Section” under the heading “Principal Strategies” for both Thrivent Balanced Income Plus Portfolio and Thrivent Diversified Income Plus Portfolio:

The equity securities in which the Portfolio invests may include common stock, preferred stock, securities convertible into common stock, or securities or other instruments the price of which is linked to the value of common stock.

4. Real Estate Investment Trust (“REIT”) Risk is removed from the “Principal Risks” in the “Summary Section” for both Thrivent Balanced Income Plus Portfolio and Thrivent Diversified Income Plus Portfolio.

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Label

Element

Value

Risk/Return:

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Registrant Name

dei_EntityRegistrantName

THRIVENT SERIES FUND INC

Prospectus Date

rr_ProspectusDate

Apr. 30, 2018

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

Thrivent Series Fund, Inc.

Supplement to

Prospectus, Thrivent Balanced Income Plus Portfolio Summary Prospectus,

and Thrivent Diversified Income Plus Portfolio Summary Prospectus

each dated April 30, 2018

2. The following replaces the first paragraph in the “Summary Section” under the heading “Principal Strategies” for Thrivent Diversified Income Plus Portfolio:

Under normal circumstances, the Portfolio invests in a combination of equity securities and debt securities within the ranges shown in the following table:

Broad Asset Category	Target Allocation			Allocation Range
Debt Securities		75	%		55-95	%
Equity Securities		25	%		5-45	%

3. The following replaces the second paragraph in the “Summary Section” under the heading “Principal Strategies” for both Thrivent Balanced Income Plus Portfolio and Thrivent Diversified Income Plus Portfolio:

The equity securities in which the Portfolio invests may include common stock, preferred stock, securities convertible into common stock, or securities or other instruments the price of which is linked to the value of common stock.

4. Real Estate Investment Trust (“REIT”) Risk is removed from the “Principal Risks” in the “Summary Section” for both Thrivent Balanced Income Plus Portfolio and Thrivent Diversified Income Plus Portfolio.

Thrivent Diversified Income Plus Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

Thrivent Series Fund, Inc.

Supplement to

Prospectus, Thrivent Diversified Income Plus Portfolio Summary Prospectus

each dated April 30, 2018

2. The following replaces the first paragraph in the “Summary Section” under the heading “Principal Strategies” for Thrivent Diversified Income Plus Portfolio:

Under normal circumstances, the Portfolio invests in a combination of equity securities and debt securities within the ranges shown in the following table:

Broad Asset Category	Target Allocation			Allocation Range
Debt Securities		75	%		55-95	%
Equity Securities		25	%		5-45	%

3. The following replaces the second paragraph in the “Summary Section” under the heading “Principal Strategies” for both Thrivent Balanced Income Plus Portfolio and Thrivent Diversified Income Plus Portfolio:

The equity securities in which the Portfolio invests may include common stock, preferred stock, securities convertible into common stock, or securities or other instruments the price of which is linked to the value of common stock.

4. Real Estate Investment Trust (“REIT”) Risk is removed from the “Principal Risks” in the “Summary Section” for both Thrivent Balanced Income Plus Portfolio and Thrivent Diversified Income Plus Portfolio.

Thrivent Balanced Income Plus Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

Thrivent Series Fund, Inc.

Supplement to

Prospectus, Thrivent Balanced Income Plus Portfolio Summary Prospectus

each dated April 30, 2018

3. The following replaces the second paragraph in the “Summary Section” under the heading “Principal Strategies” for both Thrivent Balanced Income Plus Portfolio and Thrivent Diversified Income Plus Portfolio:

The equity securities in which the Portfolio invests may include common stock, preferred stock, securities convertible into common stock, or securities or other instruments the price of which is linked to the value of common stock.

4. Real Estate Investment Trust (“REIT”) Risk is removed from the “Principal Risks” in the “Summary Section” for both Thrivent Balanced Income Plus Portfolio and Thrivent Diversified Income Plus Portfolio.

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Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	THRIVENT SERIES FUND INC
Prospectus Date	rr_ProspectusDate	Apr. 30, 2018
Document Creation Date	dei_DocumentCreationDate	Oct. 31, 2018