Investment Objective: Long-term capital growth.

Under normal conditions, the fund invests at least 80% of its net assets in a diversified portfolio of common stocks and other equity securities with, at the time of purchase, market capitalizations within the range of the Russell MidCap^® Index or the S&P MidCap 400 Index. The fund may invest up to 20% of its net assets in foreign securities not listed or traded on a U.S. exchange or quoted market. This fund is subadvised by Wellington Management Company, LLP, an unaffiliated investment management firm.

Prospectus (I Class Shares)

Prospectus (S Class Shares)

Statement of Additional Information

Annual Shareholder Report

Semi-Annual Shareholder Report

Quarterly Portfolio Holdings Information

Monthly Portfolio Holdings Information

Investors could lose money on their investments in the fund or the fund could underperform if U.S. or foreign stock markets go down or perform poorly relative to other types of investments; mid-capitalization companies fall out of favor with investors; or the fund?s investment style and mid-capitalization focus do not produce favorable results relative to market trends. Please see the prospectus for other risks.

An investment in this fund is not insured or guaranteed by the Federal Deposit Insurance Corp. or any other government agency.

This fund is not available for purchase directly by retail investors. Each fund sells its shares only to separate accounts established and maintained by insurance companies for the purpose of funding variable annuity and variable life insurance products.

You should carefully consider the investment objectives, risks, charges and expenses of an investment in the fund. This and other important information is contained in the prospectus, which may be obtained above. Variable contract owners also should obtain the separate account prospectus prepared by the insurance company for its contracts. Read all prospectuses carefully before investing or sending money.

The fund is distributed by Clarendon Insurance Agency, Inc., a wholly-owned subsidiary of Sun Life Assurance Company of Canada (U.S), which is an indirect subsidiary of Sun Life Financial Inc.

SLPC 22669 11/10 Exp. 11/12