SIBGX — MFS Growth Allocation Portfolio
Data updated: 2026-08-24
SIBGX — MFS Growth Allocation Portfolio. United States Multi-Cap / All-Cap Blend / Core Equity · $369.76M AUM. Holdings, fees, performance and SEC filings.
SIBGX Fund Overview
SIBGX — MFS Growth Allocation Portfolio is a US mutual fund managed by Mfs Variable Insurance Trust III, categorised as United States Multi-Cap / All-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: Mfs Variable Insurance Trust III
- Category: United States Multi-Cap / All-Cap Blend / Core Equity
- Assets under management: $369.76M
- 1-year return: 10.9%
- Ticker: SIBGX
- SEC CIK: 0001065698
- SEC series ID: S000023373
- Share class ID: C000068444
SIBGX Investment Objective and Strategy
MFS Growth Allocation Portfolio describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Mfs Variable Insurance Trust III.
Investment objective
The fund's investment objective is to seek a high level of total return consistent with a greater than moderate level of risk relative to the other MFS Asset Allocation Portfolios. (The MFS Asset Allocation Portfolios currently are MFS Conservative Allocation Portfolio, MFS Moderate Allocation Portfolio, and MFS Growth Allocation Portfolio.)
Principal investment strategy
The fund is designed to provide diversification among different asset classes by investing its assets in other mutual funds advised by MFS (Massachusetts Financial Services Company, the funds investment adviser), referred to as underlying funds. MFS selects the asset class allocations based on a strategic asset allocation process that takes into account a variety of factors, including historical risk and performance, projected performance, and other factors. MFS analyses of projected performance are primarily based on quantitative models using various inputs such as valuation metrics, growth rates, profitability, yields, and inflation. MFS may also consider current market conditions, its qualitative assessment of the risk/return characteristics of asset classes, and other factors in determining these allocations.
MFS employs the strategic asset allocation process described above to determine the amount of the fund's assets invested in (1) underlying funds that invest primarily in equity securities (Equity Funds) and underlying funds that provide exposure to less traditional asset classes, such as real estate (Non-Traditional Funds) and (2) underlying funds that invest primarily in debt instruments (Bond Funds) and an underlying fund that invests in cash and/or cash equivalents (Money Market Fund). MFS selects the underlying funds within each asset class based on underlying fund classifications, historical risk, historical and projected performance of the represented asset classes, as well as other factors. Within the Equity Fund allocation, MFS seeks to diversify by geography (by including domestic and international underlying funds), in terms of market capitalization (by including large, mid, and small capitalization underlying funds), and by style (by including both growth and value underlying funds).
A portion of the funds assets is also allocated to Non-Traditional Funds (i.e., asset classes less correlated to the overall equity and debt markets), which MFS believes provides further diversification benefits. Within the Bond Fund allocation, MFS includes underlying funds with varying degrees of geographic, interest rate, and credit exposure, including exposure to below investment grade quality debt instruments. A portion of the funds assets may also be allocated to the Money Market Fund. MFS normally invests the underlying funds assets across different industries, sectors, countries, and regions, but MFS may invest a significant percentage of the underlying funds' assets in issuers in a single industry, sector, country, or region. As of April 1, 2026, the funds approximate long-term strategic allocation among asset classes was: Equity Funds and Non-Traditional Fund 80 % Bond Funds and Money Market Fund 20% All percentages are rounded to the nearest percent.
MFS may deviate from the long-term strategic allocations set forth above; however, any deviation from the long-term strategic allocation is not expected to be greater than plus or minus 10% under normal market conditions. Additionally, the funds allocation to Non-Traditional Funds will not typically exceed 20% of the funds assets. As of April 1, 2026, the funds approximate strategic allocation among asset classes was: Equity Funds and Non-Traditional Fund 79.0% U.S. Equity Funds 52.5% International Equity Funds 21.5% Non-Traditional Fund 5.0% Bond Funds and Money Market Fund 21.0% Bond Funds 20.0% Money Market Fund 1.0% All percentages are rounded to the nearest tenth of a percent. As a result, the sum of the asset class allocations presented in the table may not total 100%.
SIBGX Holdings
Top 10 holdings of MFS Growth Allocation Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| MFS Variable Insurance Trust - MFS Value Series | 10.96% |
| MFS Growth Series | 10.29% |
| MFS Variable Insurance Trust II - MFS Research International Portfolio | 10.27% |
| MFS Variable Insurance Trust - Research Series | 9.25% |
| MFS VIT Mid Cap Growth Series | 9.23% |
| MFS VIT III Mid Cap Value Portfolio | 9.12% |
| MFS Variable Insurance Trust II - MFS International Growth Portfolio | 5.07% |
| MFS International Intrinsic Equity Portfolio | 5.04% |
| MFS VIT III Global Real Estate Portfolio | 5.00% |
| MFS Total Return Bond Series | 4.92% |
SIBGX Portfolio Allocation
Asset-class allocation of MFS Growth Allocation Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 100.0% |
SIBGX Performance
Total returns for SIBGX (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 6.5% |
| 1 year | 10.9% |
| 3 years (annualised) | 11.8% |
| 5 years (annualised) | 5.6% |
SIBGX Risk Information
Risk metrics for SIBGX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 9.2%
SIBGX Costs and Fees
SIBGX costs about $80 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.80%
- Gross expense ratio: 0.80%
- Portfolio turnover: 10%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
SIBGX Cashflows
Over the 12 months to 2026-06, MFS Growth Allocation Portfolio had net inflows of $34.02M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$654.52K |
| 2026-05 | $757.63K |
| 2026-04 | $1.01M |
| 2026-03 | $3.31M |
| 2026-02 | $631.58K |
| 2026-01 | $436.31K |
SIBGX Debt Constituents
No individual debt constituents are reported in MFS Growth Allocation Portfolio's latest SEC N-PORT filing.
SIBGX Prospectus and SEC Filings
Official MFS Growth Allocation 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 2024-04-26
- Portfolio holdings (N-PORT) — filed 2026-08-24
- Portfolio holdings (N-PORT) — filed 2026-05-26
- Portfolio holdings (N-PORT) — filed 2026-02-24
- Annual census (N-CEN) — filed 2026-03-13
- Annual census (N-CEN) — filed 2025-03-14
Related Funds
Other United States Multi-Cap / All-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.