Thrivent Mid Cap Index Portfolio
Data updated: 2026-08-26
C000003828 — Thrivent Mid Cap Index Portfolio. United States Mid Cap Blend / Core Equity · $807.59M AUM. Holdings, fees, performance and SEC filings.
C000003828 Fund Overview
Thrivent Mid Cap Index Portfolio is a US mutual fund managed by Thrivent Series Fund Inc, categorised as United States Mid Cap Blend / Core Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Thrivent Series Fund Inc
- Category: United States Mid Cap Blend / Core Equity
- Assets under management: $807.59M
- 1-year return: 25.6%
- SEC CIK: 0000790166
- SEC series ID: S000001421
- Share class ID: C000003828
C000003828 Investment Objective and Strategy
Thrivent Mid Cap Index Portfolio describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Thrivent Series Fund Inc.
Investment objective
"Thrivent Mid Cap Index Portfolio (the ""Portfolio"") seeks total returns that track the performance of the S&P MidCap 400 Index (the ""Index"")."
Principal investment strategy
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 mid-sized company 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 actively choose the securities that should make up the Portfolio. The Index is a capitalization weighted index of 400 medium capitalization stocks chosen for market size, liquidity, and industry representation. Accordingly, the Portfolio invests in stocks of medium-sized 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 the Index. 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.
C000003828 Holdings
Top 10 holdings of Thrivent Mid Cap Index Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Thrivent Mutual Funds | 2.07% |
| Twilio, Inc. | 0.86% |
| Carpenter Technology Corporation | 0.84% |
| Mks Incorporated | 0.83% |
| Curtiss-Wright Corporation | 0.77% |
| Nvent Electric PLC | 0.75% |
| Entegris, Inc. | 0.75% |
| Ati, Inc. | 0.74% |
| Illumina, Inc. | 0.73% |
| Technipfmc PLC | 0.73% |
C000003828 Portfolio Allocation
Asset-class allocation of Thrivent Mid Cap Index Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 100.0% |
| Cash & Equivalents | 2.3% |
C000003828 Performance
Total returns for C000003828 (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 17.2% |
| 1 year | 25.6% |
| 3 years (annualised) | 15.1% |
| 5 years (annualised) | 8.8% |
C000003828 Risk Information
Risk metrics for C000003828, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.2%
C000003828 Costs and Fees
C000003828 costs about $25 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.25%
- Gross expense ratio: 0.25%
- Portfolio turnover: 15%
- Brokerage commissions: 0.09 bps of average net assets (SEC N-CEN)
C000003828 Cashflows
Over the 12 months to 2026-06, Thrivent Mid Cap Index Portfolio had net outflows of $17.66M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $31.77M |
| 2026-05 | −$3.87M |
| 2026-04 | −$6.87M |
| 2026-03 | −$6.53M |
| 2026-02 | −$5.61M |
| 2026-01 | −$6.51M |
C000003828 Debt Constituents
No individual debt constituents are reported in Thrivent Mid Cap Index Portfolio's latest SEC N-PORT filing.
C000003828 Prospectus and SEC Filings
Official Thrivent Mid Cap Index Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-29
- Prospectus (485BPOS) — filed 2025-04-29
- Prospectus (485BPOS) — filed 2024-04-29
- Portfolio holdings (N-PORT) — filed 2026-08-26
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2026-03-11
- Annual census (N-CEN) — filed 2025-03-11
Related Funds
Other United States Mid Cap Blend / Core Equity funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.