Research International Core Portfolio
Data updated: 2026-08-20
C000050278 — Research International Core Portfolio. Developed ex-US Mid Cap Growth Financials Equity. Holdings, fees, performance and SEC filings.
C000050278 Fund Overview
Research International Core Portfolio is a US mutual fund managed by Northwestern Mutual Series Fund INC, categorised as Developed ex-US Mid Cap Growth Financials Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Northwestern Mutual Series Fund INC
- Category: Developed ex-US Mid Cap Growth Financials Equity
- Assets under management: $1.06B
- 1-year return: 16.4%
- SEC CIK: 0000742212
- SEC series ID: S000018230
- Share class ID: C000050278
C000050278 Investment Objective and Strategy
Research International Core Portfolio describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Northwestern Mutual Series Fund INC.
Investment objective
The investment objective of the Portfolio is to seek capital appreciation.
Principal investment strategy
The Portfolio normally invests primarily in foreign equity securities, including emerging market equity securities. The Portfolio normally invests its assets across different industries, sectors, countries, and regions, but the Portfolio may invest a significant percentage of its assets in issuers in a single industry, sector, country, or a particular geographic region. In conjunction with a team of investment research analysts, sector leaders select investments for the Portfolio. The adviser generally manages the Portfolio to align with the MSCI EAFE (Europe-Australasia-Far East) Index (the Index) with respect to sector weightings. The Portfolio does not, as a matter of policy, concentrate in any particular industry. The Portfolio is not constrained by any particular investment style. The adviser may invest the Portfolios assets in the stocks of companies it believes to have above average earnings growth potential compared to other companies (growth companies), in the stocks of companies it believes are undervalued compared to their perceived worth (value companies), or in a combination of growth and value companies.
The Portfolios investments in equity securities may include securities of companies of any capitalization level, and could include common stocks, preferred stocks, securities convertible into stock and American Depositary Receipts (ADRs) and other depositary receipts for those securities. The adviser uses an active bottom up investment approach to buying and selling investments for the Portfolio, which emphasizes individual stock selection. Investments are selected primarily based on fundamental analysis of individual issuers and their potential in light of their financial condition, and market, economic, political and regulatory conditions. Factors considered may include analysis of an issuers earnings, cash flows, competitive position and management ability. Quantitative screening tools that systematically evaluate an issuers valuation, price and earnings momentum, earnings quality and other factors, may also be considered.
The adviser may sell securities for a variety of reasons such as to seek to secure gains, limit losses, or redeploy assets into opportunities believed to be more promising, among others.
C000050278 Holdings
Top 10 holdings of Research International Core Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Mizuho Financial Group Inc | 2.99% |
| Schneider Electric SE | 2.85% |
| Tokyo Electron Ltd | 2.75% |
| ASML Holding NV | 2.70% |
| Taiwan Semiconductor Manufacturing Co Ltd | 2.23% |
| Novartis AG | 2.14% |
| Hitachi Ltd | 2.07% |
| TotalEnergies SE | 1.86% |
| AstraZeneca PLC | 1.77% |
| Linde PLC | 1.76% |
C000050278 Portfolio Allocation
Asset-class allocation of Research International Core Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 98.1% |
C000050278 Performance
Total returns for C000050278 (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 10.3% |
| 1 year | 16.4% |
| 3 years (annualised) | 12.9% |
| 5 years (annualised) | 6.4% |
C000050278 Risk Information
Risk metrics for C000050278, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 13.5%
C000050278 Costs and Fees
C000050278 costs about $58 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.58%
- Gross expense ratio: 0.79%
- Portfolio turnover: 42%
- Brokerage commissions: 2.93 bps of average net assets (SEC N-CEN)
C000050278 Cashflows
Over the 12 months to 2026-06, Research International Core Portfolio had net outflows of $37.96M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$2.28M |
| 2026-05 | −$309.46K |
| 2026-04 | −$5.12M |
| 2026-03 | −$6.25M |
| 2026-02 | −$13.73M |
| 2026-01 | −$8.42M |
C000050278 Debt Constituents
No individual debt constituents are reported in Research International Core Portfolio's latest SEC N-PORT filing.
C000050278 Prospectus and SEC Filings
Official Research International Core Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-24
- Prospectus (485BPOS) — filed 2025-04-25
- Prospectus supplement (497) — filed 2025-05-02
- Portfolio holdings (N-PORT) — filed 2026-08-20
- Portfolio holdings (N-PORT) — filed 2026-05-27
- Portfolio holdings (N-PORT) — filed 2026-02-23
- Annual census (N-CEN) — filed 2026-03-12
- Annual census (N-CEN) — filed 2025-03-11
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.