# EDGAR Filing Document

**Accession Number:** 0000790166
**File Stem:** 0001193125-26-192450
**Filing Date:** 2026-4
**Character Count:** 16252
**Document Hash:** 2aeb116d4bef8b22a79c5c3edfdcc5a4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-192450.hdr.sgml**: 20260430

**ACCESSION NUMBER**: 0001193125-26-192450

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 4

**FILED AS OF DATE**: 20260430

**DATE AS OF CHANGE**: 20260429

**EFFECTIVENESS DATE**: 20260430

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** THRIVENT SERIES FUND INC
- **CENTRAL INDEX KEY:** 0000790166

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-03677
- **FILM NUMBER:** 26918415

**BUSINESS ADDRESS:**
- **STREET 1:** 901 MARQUETTE AVENUE, SUITE 2500
- **CITY:** MINNEAPOLIS
- **STATE:** MN
- **ZIP:** 55402-3211
- **BUSINESS PHONE:** 612-844-7190

**MAIL ADDRESS:**
- **STREET 1:** 901 MARQUETTE AVENUE, SUITE 2500
- **CITY:** MINNEAPOLIS
- **STATE:** MN
- **ZIP:** 55402-3211

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LB SERIES FUND INC
- **DATE OF NAME CHANGE:** 19950428

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LBVIP SERIES FUND INC/
- **DATE OF NAME CHANGE:** 19940824

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LBVIP SERIES FUND INC
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### Thrivent Small Cap Index Portfolio (Series ID: S000001446)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000003853 | Class A      |  |

![](g556493thrivent_blreg.jpg)

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| | |
|:---|:---|
| **April 30, 2026** | &nbsp;&nbsp; ![](g556493img13c1378f1.jpg)<br>|

---

**Thrivent Small Cap Index Portfolio**

Summary Prospectus

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This Summary Prospectus is designed to provide investors with key portfolio information in a clear and concise format. Before you invest, you may want to review the Portfolio's complete prospectus, which contains more information about the Portfolio and its risks.

**• If you purchase shares through Thrivent:**

You can find the Portfolio's prospectus, reports to shareholders, and other information about the Portfolio online at thriventportfolios.com/prospectus. You can also get this information at no cost by calling 800-847-4839 or by sending an email request to mail@thrivent.com.

**• If you purchase shares from a firm other than Thrivent:**

You can find the Portfolio's prospectus, reports to shareholders, and other information about the Portfolio online at thriventportfolios.com/prospectus. You can also get this information by calling or emailing your financial professional.

The Portfolio's prospectus and Statement of Additional Information, both dated Apr. 30, 2026, as revised or supplemented from time to time, are incorporated by reference into this Summary Prospectus and may be obtained, free of charge, at the website, phone number or email address noted above.

Shares of the Portfolio are sold only to insurance company separate accounts or to other investment companies funded by insurance company separate accounts. This Summary Prospectus is not intended for use by other investors.

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Thrivent Small Cap Index Portfolio

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Investment Objective

Thrivent Small Cap Index Portfolio (the "Portfolio") seeks capital growth that tracks the performance of the S&P SmallCap 600<sup>®</sup> Index (the "Index").

Fees and Expenses

The table below describes the fees and expenses that you may pay if you buy, hold and/or sell shares of the Portfolio. If you own a variable annuity contract or variable life insurance contract, you will have additional fees and expenses. Please refer to the prospectus for your variable contract for additional information about fees and expenses associated with your contract.

**Shareholder Fees** 

(fees paid directly from your investment)

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| |
|:---|
| &nbsp;&nbsp; Maximum Sales Charge (load) Imposed On <br> Purchases (as a % of offering price)<br>|
| &nbsp;&nbsp; Maximum Deferred Sales Charge (load) (as a % of <br> the net asset value)<br>|

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**Annual Portfolio Operating Expenses**

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

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| | |
|:---|:---|
| Management Fees | 0.20% |
| Other Expenses | 0.04% |
| Total Annual Portfolio Operating Expenses | 0.24% |

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**Example**

The example below is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Portfolio is an investment option for variable contracts, and the example does not include charges imposed by variable contracts. If variable contract charges were included, your expenses would be higher than those shown. The example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year, and that the Portfolio's operating expenses remain the same. Although your actual cost may be higher or lower, based on the foregoing assumptions, your cost would be:

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| | | | |
|:---|:---|:---|:---|
| **1 Year** | **3 Years** | **5 Years** | **10 Years** |
| $25 | $77 | $135 | $306 |

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**Portfolio Turnover**

The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Portfolio's

performance. During the most recent fiscal year, the Portfolio's portfolio turnover rate was 30% of the average value of its portfolio.

Principal Strategies

Under normal circumstances, the Portfolio invests substantially all of its assets (more than 80% of its net assets, plus the amount of any borrowings for investment purposes) in small company common stocks included in the Index in the proportions in which they are represented in the Index. Should the Adviser change the investments used for purposes of this 80% threshold, you will be notified at least 60 days prior to the change. This is a passively managed Portfolio, which means that the Adviser does not choose the securities that make up the Portfolio. The Index is a capitalization-weighted index comprised of 600 domestic small capitalization stocks chosen for market size, liquidity, and industry representation. Accordingly, the Portfolio invests in stocks of smaller companies from a broad range of industries. The Index is adjusted quarterly, and when changes to the Index occur, the Adviser will attempt to replicate these changes within the Portfolio. However, any such changes may result in slight variations from time to time. The Portfolio may buy and sell equity index futures for investment exposure. For liquidity reasons, the Portfolio may invest to some degree in money market instruments.

Principal Risks

The Portfolio is subject to the following principal investment risks, which you should review carefully and in entirety. An investment in the Portfolio is not a deposit or other obligation of Thrivent Trust Company, Thrivent Bank, or any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other federal agency. The Portfolio may not achieve its investment objective and you could lose money by investing in the Portfolio.

**Small Cap Risk.** Smaller, less seasoned companies often have greater price volatility, lower trading volume, and less liquidity than larger, more established companies. These companies tend to have small revenues, narrower product lines, less management depth and experience, small shares of their product or service markets, fewer financial resources, and less competitive strength than larger companies. Such companies seldom pay significant dividends that could soften the impact of a falling market on returns.

**Market Risk.** Over time, securities markets generally tend to move in cycles with periods when security prices rise and periods when security prices decline. The value of the Portfolio's investments may move with these cycles and, in some instances, increase or decrease more than the applicable market(s) as measured by the Portfolio's benchmark index(es). The securities markets may also decline because of factors that affect a particular industry or market sector, or due to impacts from domestic or global events, including regulatory events, economic downturn, government shutdowns, the spread of infectious illness such as the outbreak of COVID-19, public health crises, war, terrorism, social unrest, recessions, natural disasters or similar events.

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**Equity Security Risk.** Equity securities held by the Portfolio may decline significantly in price, sometimes rapidly or unpredictably, over short or extended periods of time, and such declines may occur because of declines in the equity market as a whole, or because of declines in only a particular country, geographic region, company, industry, or sector of the market. From time to time, the Portfolio may invest a significant portion of its assets in companies in one particular country or geographic region or one or more related sectors or industries, which would make the Portfolio more vulnerable to adverse developments affecting such countries, geographic regions, sectors or industries. Equity securities generally do not move in the same direction at the same time and are generally more volatile than most debt securities.

**Futures Contract Risk.** The value of a futures contract tends to increase and decrease in tandem with the value of the underlying instrument. The price of futures can be highly volatile; using them could lower total return, and the potential loss from futures can exceed the Portfolio's initial investment in such contracts. In addition, the value of the futures contract may not accurately track the value of the underlying instrument.

**Indexing Strategy/Index Tracking Risk.** The Portfolio is managed with an indexing investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the Index or of the actual securities comprising the Index. The structure and composition of the Index will affect the performance, volatility, and risk of the Index and, consequently, the performance, volatility, and risk of the Portfolio. While the Adviser seeks to track the performance of the Index (i.e., achieve a high degree of correlation with the Index), the Portfolio's return may not match the return of the Index. The Portfolio incurs a number of operating expenses not applicable to the Index and incurs costs in buying and selling securities. In addition, the Portfolio may not be fully invested at times, generally as a result of cash flows into or out of the Portfolio or reserves of cash held by the Portfolio to meet redemptions. The Adviser may attempt to replicate the Index return by investing in fewer than all of the securities in the Index, or in some securities not included in the Index, potentially increasing the risk of divergence between the Portfolio's return and that of the Index.

**Issuer Risk.** Issuer risk is the possibility that factors specific to an issuer to which the Portfolio is exposed will affect the market prices of the issuer's securities and therefore the value of the Portfolio.

**Redemption Risk.** The Portfolio may need to sell portfolio securities to meet redemption requests. The Portfolio could experience a loss when selling portfolio securities to meet redemption requests if there is (i) significant redemption activity by shareholders, including, for example, when a single investor or few large investors make a significant redemption of Portfolio shares, (ii) a disruption in the normal operation of the markets in which the Portfolio buys and sells portfolio securities or (iii) the inability of the Portfolio to sell portfolio securities because such securities are illiquid. In such events, the Portfolio could be forced to sell portfolio securities at unfavorable prices in an effort to generate sufficient cash to pay redeeming shareholders.

Performance

The following bar chart and table beneath it provide some indication of the risks of investing in the Portfolio. The bar chart and table include the effects of Portfolio expenses, but not charges or deductions against your variable contract. They also assume that you sold your investment at the end of the period. The bar chart shows the Portfolio's performance from year to year while the table shows how the Portfolio's average annual returns for the indicated periods compare with those of an appropriate broad-based securities market index and a more narrowly based index. Because shares of the Portfolio are offered through variable life insurance and variable annuity contracts, you should carefully review the variable contract prospectus for information on applicable charges and expenses. If the charges and deductions against your variable contract were included, returns would be lower than those shown.

The Portfolio's past performance is not necessarily an indication of how it will perform in the future. Updated performance information is available on the Portfolio's website at thrivent.com or by calling 800-847-4836.

The Portfolio compares its performance to the Russell 3000<sup>®</sup> Index, an appropriate broad-based securities market index that represents the overall domestic equity market in which the Portfolio may invest. The Portfolio also compares its performance to the S&P SmallCap 600 Index, which more closely reflects the market segments in which the Portfolio invests. The index descriptions appear in the "Index Descriptions" section of the prospectus.

**Year-by-Year Total Return**

![](g556493tscip.jpg)

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| | | |
|:---|:---|:---|
| Best Quarter: | Q4 2020 | +31.25% |
| Worst Quarter: | Q1 2020 | (32.69)% |

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**Average Annual Total Returns**

(Periods Ending December 31, 2025)

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| | | | |
|:---|:---|:---|:---|
|  | **1 Year** | **5 Years** | **10 Years** |
| Portfolio (before taxes) | &nbsp;&nbsp; 5.80% | &nbsp;&nbsp; 7.06% | &nbsp;&nbsp; 9.57% |
| Russell 3000® Index<br> (reflects no deduction for <br> fees, expenses or taxes)<br>| 17.15% | 13.15% | 14.29% |
| S&P SmallCap 600® Index<br> (reflects no deduction for <br> fees, expenses or taxes)<br>| &nbsp;&nbsp; 6.02% | &nbsp;&nbsp; 7.31% | &nbsp;&nbsp; 9.81% |

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Management

**Investment Adviser**

The Portfolio is managed by Thrivent Financial for Lutherans ("Thrivent" or the "Adviser").

**Portfolio Managers**

The following individuals are jointly and primarily responsible for the day-to-day management of the Portfolio:

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| | |
|:---|:---|
| **Name and Title** | **Portfolio Manager** <br> **of the Portfolio** <br> **Since**<br>|
| Brian W. Bomgren, CQF<br> Senior Portfolio Manager<br>| January 2018 |
| Sharon Wang, CFA, FRM<br> Senior Portfolio Manager<br>| January 2018 |

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Purchase and Sale of Shares

Shares of each series of Thrivent Series Fund, Inc. (the "Fund") may be sold, without any minimum initial or subsequent investment requirements, only to:

&nbsp;&nbsp;&nbsp;&nbsp;

• Separate accounts of Thrivent;

• Separate accounts of other insurance companies not affiliated with Thrivent; and

• Other Portfolios of the Fund.

Tax Information

For information about certain tax-related aspects of investing in the Portfolio through a variable contract, please see the variable product prospectus.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase your variable contract through a broker-dealer or other financial intermediary, Thrivent, the other issuing insurance company or their related companies may pay the intermediary for the sale of the contract, the selection of the Portfolio and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your financial professional to recommend the Portfolio over another investment. Ask your financial professional or visit your financial

intermediary's website for more information.

32065AJ R4-26

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