485BPOS

As filed with the Securities and Exchange Commission on May 22, 2013

File Nos. 033-95472 and 811-09082

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER

THE SECURITIES ACT OF 1933 [X]

Post-Effective Amendment No. 26 [X]

and

REGISTRATION STATEMENT UNDER

THE INVESTMENT COMPANY ACT OF 1940 [X]

Amendment No. 27 [X]

M FUND, INC.

(Exact Name of Registrant as Specified in Charter)

M Financial Plaza

1125 NW Couch Street, Suite 900

Portland, Oregon 97209

(Address of Principal Executive Offices) (Zip Code)

Registrant's Telephone Number, including Area Code: (503) 232-6960

(Name and Address of Agent for Service)

	Copies to:
JoNell Hermanson, President	Frederick R. Bellamy, Esquire
M Fund, Inc.	Sutherland, Asbill & Brennan LLP
M Financial Plaza	1275 Pennsylvania Avenue, N.W.
1125 NW Couch Street, Suite 900	Washington, D.C. 20004-2404
Portland, Oregon 97209

It is proposed that this filing will become effective (check appropriate box)

[X] immediately upon filing pursuant to paragraph (b)

[ ] on [date] pursuant to paragraph (b)

[ ] 60 days after filing pursuant to paragraph (a)(1)

[ ] on (Date) pursuant to paragraph (a)(1)

[ ] 75 days after filing pursuant to paragraph (a)(2)

[ ] on (Date) pursuant to paragraph (a)(2) of rule 485.

If appropriate, check the following box:

[ ] this post-effective amendment designates a new effective date for a

previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this registration statement under rule 485(b) under the Securities Act of 1933 and has duly caused this Post-Effective Amendment No. 26 to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Portland, and State of Oregon on the 22nd day of May, 2013.

M FUND, INC.

By:   /s/ JoNell Hermanson

JoNell Hermanson

President (Principal Executive Officer)

Pursuant to the requirements of the Securities Act of 1933, this amendment to the Registration Statement has been signed below by the following persons in the capacities indicated on May 22, 2013.

Signature	Title
/s/ JoNell Hermanson	President
JoNell Hermanson	(Principal Executive Officer)
/s/ David Lees	Secretary and Treasurer
David Lees	(Principal Financial and Accounting Officer)
/s/ Peter W. Mullin*	Director
Peter W. Mullin
/s/ Neil E. Goldschmidt*	Director
Neil E. Goldschmidt
/s/ Gerald Bidwell*	Director
Gerald Bidwell
/s/ Bruce Madding*	Director
Bruce Madding
/s/ Lawton Nease*	Director
Lawton Nease
/s/ Wayne Pierson†	Director
Wayne Pierson

*By:	/s/ David Lees
	David Lees
	Attorney-In-Fact*
	May 22, 2013

*Powers of Attorney for Peter W. Mullin, Neil E. Goldschmidt, Gerald Bidwell, Bruce Madding and Lawton Nease are incorporated by reference to PEA No. 19 to the Registration Statement filed on February 26, 2010.

† Power of Attorney for Wayne Pierson is incorporated by reference to PEA No. 25 to the Registration Statement filed on April 25, 2013.

Exhibit Index

Exhibit No.
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Prospectus Date

rr_ProspectusDate

May 01, 2013

M Large Cap Value Fund (Prospectus Summary) | M Large Cap Value Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return, Heading

rr_RiskReturnHeading

M LARGE CAP VALUE FUND

Investment Objective, Heading

rr_ObjectiveHeading

Investment Goal

investment Objective, Primary

rr_ObjectivePrimaryTextBlock

The Fund seeks long-term capital appreciation.

Expense, Heading

rr_ExpenseHeading

Fund Fees and Expenses

Expense, Narrative

rr_ExpenseNarrativeTextBlock

The fees and expenses reflected in the table below do not include the fees and charges associated with variable annuities, variable life insurance, or qualified retirement plans. Fees and charges for life insurance and annuity products typically include a sales load and/or a surrender charge and other charges for insurance benefits. If these fees and charges were included, the costs shown below would be higher.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Operating Expenses, Caption

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)

Portfolio Turnover, Heading

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover

rr_PortfolioTurnoverTextBlock

The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 41% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

41.00%

Expenses, Restated to Reflect Current

rr_ExpensesRestatedToReflectCurrent

Restated to reflect current fees.

Expense Example, Heading

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Example

Expense Example, Narrative

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This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund 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 hypothetical 5% return each year and that the Fund's operating expenses remain the same. These expense examples do not reflect the fees and charges imposed by the applicable insurance company or retirement plan. If these fees and charges were included, the costs shown below would be higher. Although your actual costs (and returns) may be higher or lower, based on these assumptions your costs would be:

Investment Strategy, Heading

rr_StrategyHeading

Principal Investment Strategies

Investment Strategy, Narrative

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The Fund invests primarily in equity securities of U.S. issuers in the large-capitalization segment of the U.S. stock market.

The Fund's sub-adviser, AJO, LP ("AJO"), uses a systematic, disciplined, quantitative investment process. AJO is value-oriented, but believes superior results are best achieved by combining value, management (quality and growth), and momentum. Its work holds security analysis to be most productive when relative value is gauged on an industry or peer-group basis. As such, peer-group valuation and diversification constitute important aspects of its process. AJO focuses on well-managed companies with quality cash profits, relatively low market valuations, and positive price and earnings momentum. It optimizes portfolios to diversify multi-faceted risk. AJO screens every stock that trades on a major U.S. exchange for companies that have significant operating history and sufficient liquidity, while considering suitability for its investment process (no bankruptcies, ADRs, gold stocks, or funds). AJO then evaluates each company through a process that captures its philosophy. A particular strategy is built and security weights are driven by combining AJO's estimates of excess expected return and its assessment of risk for each individual security. The Fund is fully invested, sector-neutral, and well diversified in terms of industry, fundamental characteristics, and various statistical measures of risk. Individual security active weights are controlled to 1.2% above the weight in the benchmark, the Russell 1000 Value Index. The result is a portfolio with 80+ names. AJO seeks to minimize implementation shortfall, defined as the difference between valuation price and execution price, including commissions, spreads, market impact, and opportunity cost.

Risk, Heading

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Principal Investment Risks

Risk, Narrative

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the Fund will achieve its goals. The Fund's share price will fluctuate, which means you could lose money on your investment in the Fund. The Fund's investment performance could be worse than other investments:

•  if the stock market as a whole goes down;

•  if the stocks the Fund invests in underperform other investments;

•  if AJO's value, management and momentum factors do not correctly identify companies with above-market return potential; or

•  if AJO's quantitative investment process otherwise fails to perform as intended.

Risk, Lose Money

rr_RiskLoseMoney

The Fund's share price will fluctuate, which means you could lose money on your investment in the Fund.

Bar Chart and Performance Table, Heading

rr_BarChartAndPerformanceTableHeading

Performance

Performance, Narrative

rr_PerformanceNarrativeTextBlock

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year since inception and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., Russell 1000 Value Index). The performance prior to May 1, 2013 reflects the performance results obtained under a different sub-adviser using different investment strategies. Had the current sub-adviser and investment strategies been in place during the period shown, the performance results may have been different. The performance information shown here does not reflect fees that are paid by the insurance company separate accounts that invest in the Fund. Inclusion of those fees would reduce the total return figures for all periods. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Performance, Information Illustrates Variability of Returns

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year since inception and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., Russell 1000 Value Index).

Performance, Past Does Not Indicate Future

rr_PerformancePastDoesNotIndicateFuture

The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Bar Chart [Heading]

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Calendar Year Total Returns

Bar Chart, Closing

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Highest quarterly return:  15.25% (for the quarter ended 6/30/03)

Lowest quarterly return:  (21.13)% (for the quarter ended 12/31/08)

Performance Table, Narrative

rr_PerformanceTableNarrativeTextBlock

The table below shows the Fund's average annual total returns for the periods indicated, and how those returns compare to those of the Russell 1000 Value Index. You cannot invest directly in an index. The Index is calculated on a total return basis and reflects no deduction for fees, expenses or taxes.

Average Annual Returns, Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns (for the periods ended December 31, 2012)

M Large Cap Value Fund (Prospectus Summary) | M Large Cap Value Fund | M Large Cap Value Fund

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution (12b-1) Fee

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.29%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.74%

Less Fee Waiver/Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.04%)

^[2]

Net Expenses

rr_NetExpensesOverAssets

0.70%

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2014-04-30

Expense Example, With Redemption, 1 Year

rr_ExpenseExampleYear01

72

Expense Example, With Redemption, 3 Years

rr_ExpenseExampleYear03

233

Expense Example, With Redemption, 5 Years

rr_ExpenseExampleYear05

408

Expense Example, With Redemption, 10 Years

rr_ExpenseExampleYear10

915

Annual Return 2003

rr_AnnualReturn2003

29.65%

Annual Return 2004

rr_AnnualReturn2004

22.60%

Annual Return 2005

rr_AnnualReturn2005

7.81%

Annual Return 2006

rr_AnnualReturn2006

13.89%

Annual Return 2007

rr_AnnualReturn2007

5.44%

Annual Return 2008

rr_AnnualReturn2008

(34.48%)

Annual Return 2009

rr_AnnualReturn2009

24.58%

Annual Return 2010

rr_AnnualReturn2010

9.27%

Annual Return 2011

rr_AnnualReturn2011

(4.11%)

Annual Return 2012

rr_AnnualReturn2012

17.29%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest quarterly return:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2003

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

15.25%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest quarterly return:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(21.13%)

Average Annual Returns, Label

rr_AverageAnnualReturnLabel

M Large Cap Value Fund

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

17.29%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.06%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.52%

M Large Cap Value Fund (Prospectus Summary) | M Large Cap Value Fund | Russell 1000 Value Index

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, Label

rr_AverageAnnualReturnLabel

Russell 1000 Value Index

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

17.51%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.59%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.38%

[1] Restated to reflect current fees. Due to the change in the sub-adviser of the Fund, which was effective May 1, 2013, the advisory fee payable to the Adviser decreased from 0.65% of the first $50 million, 0.60% of the next $50 million, 0.55% of the next $100 million and 0.50% thereafter of the Fund's average daily net assets to 0.45% of the first $250 million, 0.35% of the next $250 million, 0.30% of the next $250 million and 0.275% thereafter of the Fund's average daily net assets.

[2] For the period from May 1, 2013 to April 30, 2014, the Adviser contractually agreed to reimburse the Fund for certain operating expenses (other than advisory fees, brokerage or other portfolio transaction expenses or expenses for litigation, indemnification, taxes or other extraordinary expenses) to the extent that such expenses exceed 0.25% of the Fund's annualized average daily net assets.

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M Large Cap Growth Fund (Prospectus Summary) | M Large Cap Growth Fund

M LARGE CAP GROWTH FUND

Investment Goal

The Fund seeks long-term capital appreciation.

Fund Fees and Expenses

The fees and expenses reflected in the table below do not include the fees and charges associated with variable annuities, variable life insurance, or qualified retirement plans. Fees and charges for life insurance and annuity products typically include a sales load and/or a surrender charge and other charges for insurance benefits. If these fees and charges were included, the costs shown below would be higher.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)

Annual Fund Operating Expenses		M Large Cap Growth Fund
Management Fees		0.61%
Distribution (12b-1) Fee		none
Other Expenses	[1]	0.19%
Total Annual Fund Operating Expenses		0.80%

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund 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 hypothetical 5% return each year and that the Fund's operating expenses remain the same. These expense examples do not reflect the fees and charges imposed by the applicable insurance company or retirement plan. If these fees and charges were included, the costs shown below would be higher. Although your actual costs (and returns) may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	Expense Example, With Redemption, 1 Year	Expense Example, With Redemption, 3 Years	Expense Example, With Redemption, 5 Years	Expense Example, With Redemption, 10 Years
M Large Cap Growth Fund	82	255	444	990

Portfolio Turnover

The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 67% of the average value of its portfolio.

Principal Investment Strategies

The Fund's sub-adviser, DSM Capital Partners LLC, ("DSM") uses a "bottom-up," idea-driven approach and focuses on a long-term (e.g., three year minimum) investment horizon. This means that portfolio managers and research analysts identify companies, one-by-one, which exhibit certain characteristics. Correspondingly, while DSM is cognizant of "macro" trends in the U.S. and world economy, as well as business trends in the broad sectors of the economy (so-called "top-down" analysis), investment decisions are primarily based on company fundamentals.

The Fund invests primarily in large-cap equity securities, including common stocks and preferred stocks. DSM defines "large-cap" as capitalizations of $10 billion or more.

DSM seeks to invest in growing businesses with solid fundamentals, attractive profitability, and successful management. Candidate companies will typically have projected revenue and earnings growth in excess of 10% and will often have higher returns on equity and assets than average S&P 500 companies. Generally, these businesses will be generating free cash flow and will have financial returns that are stable or rising, driven by improving business fundamentals all as determined by DSM.

By focusing on company fundamentals and using its proprietary valuation methodology, DSM tries to capture inefficiencies in the market. DSM's in-depth knowledge of fundamental analysis, the compact nature of its investment team, the quality of the information flow within the company and the speed of decision-making is designed to allow DSM to take advantage of mispriced securities.

DSM's portfolio managers/research analysts work closely together such that there is one research effort. The research process, in addition to covering portfolio and "on-deck" holdings, involves working up new ideas in a "peeling of the onion" process among the team until an idea is rejected or accepted.

DSM screens for growth ideas by searching databases representing thousands of companies, using various criteria, including revenue growth, earnings growth, free cash flow, profitability, use of debt, and negative earnings surprises.

In researching existing holdings and candidate companies, DSM employs proprietary work including extensive use of "expert interviews" with knowledgeable third parties. DSM's portfolio manager/research analysts also attend a wide variety of industry-sponsored conferences. In addition, DSM contracts with survey research firms to conduct proprietary surveys on relevant issues within certain industries. Importantly, DSM believes that the research work on each holding and candidate company is a continuing process designed to keep up with evolving issues, such as markets, global competition and economic conditions that can "change the game" for companies and entire industries.

Principal Investment Risks

As with any mutual fund, there is no guarantee that the Fund will achieve its goals. The Fund's share price will fluctuate, which means you could lose money on your investment in the Fund. The Fund's investment performance could be worse than other investments:

•  if the stock market as a whole goes down;

•  if the market values the stocks in the Fund's portfolio lower than the sub-adviser believes they should be valued;

•  if the earnings of the growth-oriented companies in which the Fund invests do not grow or grow less rapidly than expected;

•  because the portfolio is typically comprised of 25 to 35 holdings, which is less diversified than the overall stock market;

•  because growth investing emphasizes stock price appreciation over current income from dividends;

•  due to the costs and risks of relatively active trading;

•  because large cap companies may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes, may be more prone to global economic risks, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion;

•  because growth-oriented investments may underperform when value investing is in favor;

•  because securities of Foreign Issuers involve additional risks, including currency-rate fluctuations, political and economic instability, differences in financial reporting standards, less-strict regulation of securities markets and less liquidity and more volatility than domestic markets, which may result in delays in settling securities transactions;

•  because the Fund may hold a significant percentage of its assets in the securities of one company, and therefore it may be more sensitive to market changes than a diversified fund; or

•  because changes in government regulations may adversely affect the value of a security.

It is not expected that the Fund will own a substantial amount of securities that pay dividends. Investors in the Fund should not expect dividend income to offset any decline in the prices of portfolio securities.

Performance

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for each of the last ten calendar years and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., the Russell 1000 Growth Index). The performance prior to October 12, 2009 reflects the performance results obtained under a different sub-adviser using different investment strategies. Had the current sub-adviser and investment strategies been in place during the period shown, the performance results may have been different. The performance information shown here does not reflect fees that are paid by the insurance company separate accounts that invest in the Fund. Inclusion of those fees would reduce the total return figures for all periods. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Calendar Year Total Returns

Highest quarterly return:  17.40% (for the quarter ended 9/30/10)

Lowest quarterly return:  (26.29)% (for the quarter ended 12/31/08)

Average Annual Total Returns (for the periods ended December 31, 2012)

The table below shows the Fund's average annual total returns for the periods indicated, and how those returns compare to those of the Russell 1000 Growth Index. You cannot invest directly in an index. The Index is calculated on a total return basis and reflects no deduction for fees, expenses or taxes.

Average Annual Total Returns	Average Annual Returns, Label	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
M Large Cap Growth Fund	M Large Cap Growth Fund	19.31%	0.42%	8.75%
Russell 1000 Growth Index	Russell 1000 Growth Index	15.25%	3.13%	7.53%

[1] For the period from May 1, 2013 to April 30, 2014, the Adviser has contractually agreed to reimburse the Fund for certain operating expenses (other than advisory fees, brokerage or other portfolio transaction expenses or expenses for litigation, indemnification, taxes or other extraordinary expenses) to the extent that such expenses exceed 0.25% of the Fund's annualized average daily net assets.

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M International Equity Fund (Prospectus Summary) | M International Equity Fund

M INTERNATIONAL EQUITY FUND

Investment Goal

The Fund seeks long-term capital appreciation.

Fund Fees and Expenses

The fees and expenses reflected in the table below do not include the fees and charges associated with variable annuities, variable life insurance, or qualified retirement plans. Fees and charges for life insurance and annuity products typically include a sales load and/or a surrender charge and other charges for insurance benefits. If these fees and charges were included, the costs shown below would be higher.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)

Annual Fund Operating Expenses		M International Equity Fund
Management Fees		0.70%
Distribution (12b-1) Fee		none
Other Expenses		0.27%
Total Annual Fund Operating Expenses		0.97%
Less Expense Reimbursement	[1]	0.02%
Net Expenses		0.95%

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund 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 hypothetical 5% return each year and that the Fund's operating expenses remain the same. These expense examples do not reflect the fees and charges imposed by the applicable insurance company or retirement plan. If these fees and charges were included, the costs shown below would be higher. Although your actual costs (and returns) may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	Expense Example, With Redemption, 1 Year	Expense Example, With Redemption, 3 Years	Expense Example, With Redemption, 5 Years	Expense Example, With Redemption, 10 Years
M International Equity Fund	97	307	534	1,188

Portfolio Turnover

The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 15% of the average value of its portfolio.

Principal Investment Strategies

The Fund will normally invest at least 80% of its total assets in equity securities of issuers located in at least three countries other than the United States. These countries may include, but are not limited to, the nations of Western Europe, North and South America, Australia, Africa and Asia. This strategy is not fundamental (it may be changed without shareholder approval), but should the Fund decide to change this strategy, it will provide shareholders with at least 60 days' notice.

Securities will generally be purchased in the form of common stock, preferred stock, securities that are convertible into common stock, American Depository Receipts (ADRs), European Depository Receipts (EDRs), International Depository Receipts (IDRs) or Global Depository Receipts (GDRs). The Fund focuses on stocks with capitalizations of $1 billion or more. The Fund also may invest in emerging market securities.

The Fund's sub-adviser, Northern Cross, LLC's ("Northern Cross") investment philosophy is to buy undervalued quality companies with improving margins and aim to hold them for five to seven years.

Principal Investment Risks

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's share price will fluctuate, which means you could lose money on your investment in the Fund. The Fund's investment performance could be worse than other investments:

•  if the stock market as a whole goes down;

•  if the market values the stocks in the Fund's portfolio lower than Northern Cross believes they should be valued;

•  because investments in foreign securities may have more frequent and larger price changes than U.S. securities;

•  because investments in foreign securities may lose value due to changes in currency exchange rates and other factors;

•  because emerging market securities involve unique risks, such as exposure to economies less diverse and mature than that of the U.S.;

•  because economic or political changes may cause larger price changes in emerging market securities than other foreign securities;

•  because the Fund may be more susceptible to economic, political or regulatory changes in any single country or industry than more highly diversified funds; or

•  if the stocks in the Fund's portfolio do not grow over the long term or grow less rapidly than expected.

Performance

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for each of the last ten calendar years and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., the Morgan Stanley Capital International - Europe, Australasia, Far East Index (MSCI EAFE Index)). The performance prior to June 17, 2011 reflects the performance results obtained under a different sub-adviser using different investment strategies. Had the current sub-adviser and investment strategies been in place during the period shown, the performance results may have been different. The performance information shown here does not reflect fees that are paid by the insurance company separate accounts that invest in the Fund. Inclusion of those fees would reduce the total return figures for all periods. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Calendar Year Total Returns

Highest quarterly return:  26.60% (for the quarter ended 6/30/03)

Lowest quarterly return:  (22.89)% (for the quarter ended 9/30/11)

Average Annual Total Returns (for the periods ended December 31, 2012)

The table below shows the Fund's average annual total returns for the periods indicated, and how those returns compare to those of the MSCI EAFE Index. You cannot invest directly in an index. The Index is calculated on a total return basis and reflects no deduction for fees, expenses or taxes.

Average Annual Total Returns	Average Annual Returns, Label	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
M International Equity Fund	M International Equity Fund	20.68%	(3.84%)	8.57%
MSCI EAFE Index	MSCI EAFE Index	17.32%	(3.69%)	8.21%

[1] For the period from May 1, 2013 to April 30, 2014, M Financial Investment Advisers, Inc. (the "Adviser") contractually agreed to reimburse the Fund for certain operating expenses (other than advisory fees, brokerage or other portfolio transaction expenses or expenses for litigation, indemnification, taxes or other extraordinary expenses) to the extent that such expenses exceed 0.25% of the Fund's annualized average daily net assets.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Prospectus Date

rr_ProspectusDate

May 01, 2013

M International Equity Fund (Prospectus Summary) | M International Equity Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return, Heading

rr_RiskReturnHeading

M INTERNATIONAL EQUITY FUND

Investment Objective, Heading

rr_ObjectiveHeading

Investment Goal

investment Objective, Primary

rr_ObjectivePrimaryTextBlock

The Fund seeks long-term capital appreciation.

Expense, Heading

rr_ExpenseHeading

Fund Fees and Expenses

Expense, Narrative

rr_ExpenseNarrativeTextBlock

The fees and expenses reflected in the table below do not include the fees and charges associated with variable annuities, variable life insurance, or qualified retirement plans. Fees and charges for life insurance and annuity products typically include a sales load and/or a surrender charge and other charges for insurance benefits. If these fees and charges were included, the costs shown below would be higher.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Operating Expenses, Caption

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)

Portfolio Turnover, Heading

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover

rr_PortfolioTurnoverTextBlock

The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 15% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

15.00%

Expense Example, Heading

rr_ExpenseExampleHeading

Example

Expense Example, Narrative

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund 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 hypothetical 5% return each year and that the Fund's operating expenses remain the same. These expense examples do not reflect the fees and charges imposed by the applicable insurance company or retirement plan. If these fees and charges were included, the costs shown below would be higher. Although your actual costs (and returns) may be higher or lower, based on these assumptions your costs would be:

Investment Strategy, Heading

rr_StrategyHeading

Principal Investment Strategies

Investment Strategy, Narrative

rr_StrategyNarrativeTextBlock

The Fund will normally invest at least 80% of its total assets in equity securities of issuers located in at least three countries other than the United States. These countries may include, but are not limited to, the nations of Western Europe, North and South America, Australia, Africa and Asia. This strategy is not fundamental (it may be changed without shareholder approval), but should the Fund decide to change this strategy, it will provide shareholders with at least 60 days' notice.

Securities will generally be purchased in the form of common stock, preferred stock, securities that are convertible into common stock, American Depository Receipts (ADRs), European Depository Receipts (EDRs), International Depository Receipts (IDRs) or Global Depository Receipts (GDRs). The Fund focuses on stocks with capitalizations of $1 billion or more. The Fund also may invest in emerging market securities.

The Fund's sub-adviser, Northern Cross, LLC's ("Northern Cross") investment philosophy is to buy undervalued quality companies with improving margins and aim to hold them for five to seven years.

Risk, Heading

rr_RiskHeading

Principal Investment Risks

Risk, Narrative

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the Fund will achieve its goal. The Fund's share price will fluctuate, which means you could lose money on your investment in the Fund. The Fund's investment performance could be worse than other investments:

•  if the stock market as a whole goes down;

•  if the market values the stocks in the Fund's portfolio lower than Northern Cross believes they should be valued;

•  because investments in foreign securities may have more frequent and larger price changes than U.S. securities;

•  because investments in foreign securities may lose value due to changes in currency exchange rates and other factors;

•  because emerging market securities involve unique risks, such as exposure to economies less diverse and mature than that of the U.S.;

•  because economic or political changes may cause larger price changes in emerging market securities than other foreign securities;

•  because the Fund may be more susceptible to economic, political or regulatory changes in any single country or industry than more highly diversified funds; or

•  if the stocks in the Fund's portfolio do not grow over the long term or grow less rapidly than expected.

Risk, Lose Money

rr_RiskLoseMoney

The Fund's share price will fluctuate, which means you could lose money on your investment in the Fund.

Bar Chart and Performance Table, Heading

rr_BarChartAndPerformanceTableHeading

Performance

Performance, Narrative

rr_PerformanceNarrativeTextBlock

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for each of the last ten calendar years and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., the Morgan Stanley Capital International - Europe, Australasia, Far East Index (MSCI EAFE Index)). The performance prior to June 17, 2011 reflects the performance results obtained under a different sub-adviser using different investment strategies. Had the current sub-adviser and investment strategies been in place during the period shown, the performance results may have been different. The performance information shown here does not reflect fees that are paid by the insurance company separate accounts that invest in the Fund. Inclusion of those fees would reduce the total return figures for all periods. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Performance, Information Illustrates Variability of Returns

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for each of the last ten calendar years and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., the Morgan Stanley Capital International - Europe, Australasia, Far East Index (MSCI EAFE Index)).

Performance, Past Does Not Indicate Future

rr_PerformancePastDoesNotIndicateFuture

The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns

Bar Chart, Closing

rr_BarChartClosingTextBlock

Highest quarterly return:  26.60% (for the quarter ended 6/30/03)

Lowest quarterly return:  (22.89)% (for the quarter ended 9/30/11)

Performance Table, Narrative

rr_PerformanceTableNarrativeTextBlock

The table below shows the Fund's average annual total returns for the periods indicated, and how those returns compare to those of the MSCI EAFE Index. You cannot invest directly in an index. The Index is calculated on a total return basis and reflects no deduction for fees, expenses or taxes.

Average Annual Returns, Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns (for the periods ended December 31, 2012)

M International Equity Fund (Prospectus Summary) | M International Equity Fund | M International Equity Fund

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution (12b-1) Fee

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.27%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.97%

Less Fee Waiver/Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

^[1]

Net Expenses

rr_NetExpensesOverAssets

0.95%

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2014-04-30

Expense Example, With Redemption, 1 Year

rr_ExpenseExampleYear01

97

Expense Example, With Redemption, 3 Years

rr_ExpenseExampleYear03

307

Expense Example, With Redemption, 5 Years

rr_ExpenseExampleYear05

534

Expense Example, With Redemption, 10 Years

rr_ExpenseExampleYear10

1,188

Annual Return 2003

rr_AnnualReturn2003

47.43%

Annual Return 2004

rr_AnnualReturn2004

24.00%

Annual Return 2005

rr_AnnualReturn2005

10.55%

Annual Return 2006

rr_AnnualReturn2006

26.78%

Annual Return 2007

rr_AnnualReturn2007

8.01%

Annual Return 2008

rr_AnnualReturn2008

(39.84%)

Annual Return 2009

rr_AnnualReturn2009

25.28%

Annual Return 2010

rr_AnnualReturn2010

4.61%

Annual Return 2011

rr_AnnualReturn2011

(13.56%)

Annual Return 2012

rr_AnnualReturn2012

20.68%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest quarterly return:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2003

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

26.60%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest quarterly return:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(22.89%)

Average Annual Returns, Label

rr_AverageAnnualReturnLabel

M International Equity Fund

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

20.68%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

(3.84%)

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

8.57%

M International Equity Fund (Prospectus Summary) | M International Equity Fund | MSCI EAFE Index

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, Label

rr_AverageAnnualReturnLabel

MSCI EAFE Index

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

17.32%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

(3.69%)

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

8.21%

[1] For the period from May 1, 2013 to April 30, 2014, M Financial Investment Advisers, Inc. (the "Adviser") contractually agreed to reimburse the Fund for certain operating expenses (other than advisory fees, brokerage or other portfolio transaction expenses or expenses for litigation, indemnification, taxes or other extraordinary expenses) to the extent that such expenses exceed 0.25% of the Fund's annualized average daily net assets.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Entity Registrant Name	dei_EntityRegistrantName	M FUND INC
Entity Central Index Key	dei_EntityCentralIndexKey	0000948258
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	May 01, 2013
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Apr. 25, 2013
Document Effective Date	dei_DocumentEffectiveDate	May 01, 2013
M International Equity Fund (Prospectus Summary) | M International Equity Fund | M International Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	MBEQX
M Large Cap Growth Fund (Prospectus Summary) | M Large Cap Growth Fund | M Large Cap Growth Fund
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	MTCGX
M Capital Appreciation Fund (Prospectus Summary) | M Capital Appreciation Fund | M Capital Appreciation Fund
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	MFCPX
M Large Cap Value Fund (Prospectus Summary) | M Large Cap Value Fund | M Large Cap Value Fund
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	MBOVX

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Prospectus Date

rr_ProspectusDate

May 01, 2013

M Capital Appreciation Fund (Prospectus Summary) | M Capital Appreciation Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return, Heading

rr_RiskReturnHeading

M CAPITAL APPRECIATION FUND

Investment Objective, Heading

rr_ObjectiveHeading

Investment Goal

investment Objective, Primary

rr_ObjectivePrimaryTextBlock

The Fund seeks maximum capital appreciation.

Expense, Heading

rr_ExpenseHeading

Fund Fees and Expenses

Expense, Narrative

rr_ExpenseNarrativeTextBlock

The fees and expenses reflected in the table below do not include the fees and charges associated with variable annuities, variable life insurance, or qualified retirement plans. Fees and charges for life insurance and annuity products typically include a sales load and/or a surrender charge and other charges for insurance benefits. If these fees and charges were included, the costs shown below would be higher.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Operating Expenses, Caption

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)

Portfolio Turnover, Heading

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover

rr_PortfolioTurnoverTextBlock

The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 21% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

21.00%

Expense Example, Heading

rr_ExpenseExampleHeading

Example

Expense Example, Narrative

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund 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 hypothetical 5% return each year and that the Fund's operating expenses remain the same. These expense examples do not reflect the fees and charges imposed by the applicable insurance company or retirement plan. If these fees and charges were included, the costs shown below would be higher. Although your actual costs (and returns) may be higher or lower, based on these assumptions your costs would be:

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns

Investment Strategy, Heading

rr_StrategyHeading

Principal Investment Strategies

Investment Strategy, Narrative

rr_StrategyNarrativeTextBlock

The Fund invests in common stock of U.S. companies of all sizes, with emphasis on stocks of companies with capitalizations that are consistent with the capitalizations of those companies found in the Russell 2500 Index.

The Fund's sub-adviser, Frontier Capital Management Company, LLC ("Frontier") seeks to invest in companies with unrecognized earnings potential. Earnings per share, growth and price appreciation are important factors. Wall Street analysts do not usually widely follow small to mid-sized companies like those in which the Fund invests, and institutional investors usually do not own a large percentage of them. The cornerstone of Frontier's investment process is internally generated fundamental research.

Stocks are sold if earnings growth potential is realized, when the fundamental reasons for purchase are no longer valid, or when a more attractive situation is identified.

Risk, Heading

rr_RiskHeading

Principal Investment Risks

Risk, Narrative

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the Fund will achieve its goals. The Fund's share price will fluctuate which, means you could lose money on your investment in the Fund. The Fund's investment performance could be worse than other investments:

•  if the stock market as a whole goes down;

•  if the market values the stocks in the Fund's portfolio lower than Frontier believes they should be valued;

•  if earnings growth estimates of companies the Fund invests in are not achieved; or

•  because securities of smaller-capitalization companies may be more thinly traded and may have more frequent and larger price changes than securities of larger-capitalization companies.

Risk, Lose Money

rr_RiskLoseMoney

The Fund's share price will fluctuate which, means you could lose money on your investment in the Fund.

Bar Chart and Performance Table, Heading

rr_BarChartAndPerformanceTableHeading

Performance

Performance, Information Illustrates Variability of Returns

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for each of the last ten calendar years and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., the Russell 2500 Index).

Performance, Past Does Not Indicate Future

rr_PerformancePastDoesNotIndicateFuture

The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Performance, Narrative

rr_PerformanceNarrativeTextBlock

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for each of the last ten calendar years and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., the Russell 2500 Index). The performance information shown here does not reflect fees that are paid by the insurance company separate accounts that invest in the Fund. Inclusion of those fees would reduce the total return figures for all periods. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Bar Chart, Closing

rr_BarChartClosingTextBlock

Highest quarterly return:  23.54% (for the quarter ended 6/30/03)

Lowest quarterly return:  (29.48)% (for the quarter ended 12/31/08)

Performance Table, Narrative

rr_PerformanceTableNarrativeTextBlock

The table below shows the Fund's average annual total returns for the periods indicated, and how those returns compare to those of the Russell 2500 Index. You cannot invest directly in an index. The Index is calculated on a total return basis and reflects no deduction for fees, expenses or taxes.

Average Annual Returns, Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns (for the periods ended December 31, 2012)

M Capital Appreciation Fund (Prospectus Summary) | M Capital Appreciation Fund | M Capital Appreciation Fund

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution (12b-1) Fee

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.20%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.10%

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2014-04-30

Expense Example, With Redemption, 1 Year

rr_ExpenseExampleYear01

112

Expense Example, With Redemption, 3 Years

rr_ExpenseExampleYear03

350

Expense Example, With Redemption, 5 Years

rr_ExpenseExampleYear05

606

Expense Example, With Redemption, 10 Years

rr_ExpenseExampleYear10

1,340

Annual Return 2003

rr_AnnualReturn2003

55.89%

Annual Return 2004

rr_AnnualReturn2004

9.33%

Annual Return 2005

rr_AnnualReturn2005

15.13%

Annual Return 2006

rr_AnnualReturn2006

16.30%

Annual Return 2007

rr_AnnualReturn2007

11.96%

Annual Return 2008

rr_AnnualReturn2008

(42.03%)

Annual Return 2009

rr_AnnualReturn2009

48.61%

Annual Return 2010

rr_AnnualReturn2010

27.00%

Annual Return 2011

rr_AnnualReturn2011

(7.22%)

Annual Return 2012

rr_AnnualReturn2012

17.43%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest quarterly return:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2003

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

23.54%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest quarterly return:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(29.48%)

Average Annual Returns, Label

rr_AverageAnnualReturnLabel

M Capital Appreciation Fund

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

17.43%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.58%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

11.78%

M Capital Appreciation Fund (Prospectus Summary) | M Capital Appreciation Fund | Russell 2500 Index

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, Label

rr_AverageAnnualReturnLabel

Russell 2500 Index

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

17.88%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.34%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

10.48%

[1] For the period from May 1, 2013 to April 30, 2014, the Adviser contractually agreed to reimburse the Fund for certain operating expenses (other than advisory fees, brokerage or other portfolio transaction expenses or expenses for litigation, indemnification, taxes or other extraordinary expenses) to the extent that such expenses exceed 0.25% of the Fund's annualized average daily net assets.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Prospectus Date

rr_ProspectusDate

May 01, 2013

M Large Cap Growth Fund (Prospectus Summary) | M Large Cap Growth Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return, Heading

rr_RiskReturnHeading

M LARGE CAP GROWTH FUND

Investment Objective, Heading

rr_ObjectiveHeading

Investment Goal

investment Objective, Primary

rr_ObjectivePrimaryTextBlock

The Fund seeks long-term capital appreciation.

Operating Expenses, Caption

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)

Expense, Heading

rr_ExpenseHeading

Fund Fees and Expenses

Expense, Narrative

rr_ExpenseNarrativeTextBlock

The fees and expenses reflected in the table below do not include the fees and charges associated with variable annuities, variable life insurance, or qualified retirement plans. Fees and charges for life insurance and annuity products typically include a sales load and/or a surrender charge and other charges for insurance benefits. If these fees and charges were included, the costs shown below would be higher.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Portfolio Turnover, Heading

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover

rr_PortfolioTurnoverTextBlock

The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 67% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

67.00%

Expense Example, Heading

rr_ExpenseExampleHeading

Example

Expense Example, Narrative

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund 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 hypothetical 5% return each year and that the Fund's operating expenses remain the same. These expense examples do not reflect the fees and charges imposed by the applicable insurance company or retirement plan. If these fees and charges were included, the costs shown below would be higher. Although your actual costs (and returns) may be higher or lower, based on these assumptions your costs would be:

Investment Strategy, Heading

rr_StrategyHeading

Principal Investment Strategies

Investment Strategy, Narrative

rr_StrategyNarrativeTextBlock

The Fund's sub-adviser, DSM Capital Partners LLC, ("DSM") uses a "bottom-up," idea-driven approach and focuses on a long-term (e.g., three year minimum) investment horizon. This means that portfolio managers and research analysts identify companies, one-by-one, which exhibit certain characteristics. Correspondingly, while DSM is cognizant of "macro" trends in the U.S. and world economy, as well as business trends in the broad sectors of the economy (so-called "top-down" analysis), investment decisions are primarily based on company fundamentals.

The Fund invests primarily in large-cap equity securities, including common stocks and preferred stocks. DSM defines "large-cap" as capitalizations of $10 billion or more.

DSM seeks to invest in growing businesses with solid fundamentals, attractive profitability, and successful management. Candidate companies will typically have projected revenue and earnings growth in excess of 10% and will often have higher returns on equity and assets than average S&P 500 companies. Generally, these businesses will be generating free cash flow and will have financial returns that are stable or rising, driven by improving business fundamentals all as determined by DSM.

By focusing on company fundamentals and using its proprietary valuation methodology, DSM tries to capture inefficiencies in the market. DSM's in-depth knowledge of fundamental analysis, the compact nature of its investment team, the quality of the information flow within the company and the speed of decision-making is designed to allow DSM to take advantage of mispriced securities.

DSM's portfolio managers/research analysts work closely together such that there is one research effort. The research process, in addition to covering portfolio and "on-deck" holdings, involves working up new ideas in a "peeling of the onion" process among the team until an idea is rejected or accepted.

DSM screens for growth ideas by searching databases representing thousands of companies, using various criteria, including revenue growth, earnings growth, free cash flow, profitability, use of debt, and negative earnings surprises.

In researching existing holdings and candidate companies, DSM employs proprietary work including extensive use of "expert interviews" with knowledgeable third parties. DSM's portfolio manager/research analysts also attend a wide variety of industry-sponsored conferences. In addition, DSM contracts with survey research firms to conduct proprietary surveys on relevant issues within certain industries. Importantly, DSM believes that the research work on each holding and candidate company is a continuing process designed to keep up with evolving issues, such as markets, global competition and economic conditions that can "change the game" for companies and entire industries.

Risk, Heading

rr_RiskHeading

Principal Investment Risks

Risk, Narrative

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the Fund will achieve its goals. The Fund's share price will fluctuate, which means you could lose money on your investment in the Fund. The Fund's investment performance could be worse than other investments:

•  if the stock market as a whole goes down;

•  if the market values the stocks in the Fund's portfolio lower than the sub-adviser believes they should be valued;

•  if the earnings of the growth-oriented companies in which the Fund invests do not grow or grow less rapidly than expected;

•  because the portfolio is typically comprised of 25 to 35 holdings, which is less diversified than the overall stock market;

•  because growth investing emphasizes stock price appreciation over current income from dividends;

•  due to the costs and risks of relatively active trading;

•  because large cap companies may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes, may be more prone to global economic risks, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion;

•  because growth-oriented investments may underperform when value investing is in favor;

•  because securities of Foreign Issuers involve additional risks, including currency-rate fluctuations, political and economic instability, differences in financial reporting standards, less-strict regulation of securities markets and less liquidity and more volatility than domestic markets, which may result in delays in settling securities transactions;

•  because the Fund may hold a significant percentage of its assets in the securities of one company, and therefore it may be more sensitive to market changes than a diversified fund; or

•  because changes in government regulations may adversely affect the value of a security.

It is not expected that the Fund will own a substantial amount of securities that pay dividends. Investors in the Fund should not expect dividend income to offset any decline in the prices of portfolio securities.

Risk, Lose Money

rr_RiskLoseMoney

The Fund's share price will fluctuate, which means you could lose money on your investment in the Fund.

Bar Chart and Performance Table, Heading

rr_BarChartAndPerformanceTableHeading

Performance

Performance, Narrative

rr_PerformanceNarrativeTextBlock

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for each of the last ten calendar years and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., the Russell 1000 Growth Index). The performance prior to October 12, 2009 reflects the performance results obtained under a different sub-adviser using different investment strategies. Had the current sub-adviser and investment strategies been in place during the period shown, the performance results may have been different. The performance information shown here does not reflect fees that are paid by the insurance company separate accounts that invest in the Fund. Inclusion of those fees would reduce the total return figures for all periods. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Performance, Information Illustrates Variability of Returns

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for each of the last ten calendar years and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., the Russell 1000 Growth Index).

Performance, Past Does Not Indicate Future

rr_PerformancePastDoesNotIndicateFuture

The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns

Bar Chart, Closing

rr_BarChartClosingTextBlock

Highest quarterly return:  17.40% (for the quarter ended 9/30/10)

Lowest quarterly return:  (26.29)% (for the quarter ended 12/31/08)

Performance Table, Narrative

rr_PerformanceTableNarrativeTextBlock

The table below shows the Fund's average annual total returns for the periods indicated, and how those returns compare to those of the Russell 1000 Growth Index. You cannot invest directly in an index. The Index is calculated on a total return basis and reflects no deduction for fees, expenses or taxes.

Average Annual Returns, Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns (for the periods ended December 31, 2012)

M Large Cap Growth Fund (Prospectus Summary) | M Large Cap Growth Fund | M Large Cap Growth Fund

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.61%

Distribution (12b-1) Fee

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.19%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.80%

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2014-04-30

Expense Example, With Redemption, 1 Year

rr_ExpenseExampleYear01

82

Expense Example, With Redemption, 3 Years

rr_ExpenseExampleYear03

255

Expense Example, With Redemption, 5 Years

rr_ExpenseExampleYear05

444

Expense Example, With Redemption, 10 Years

rr_ExpenseExampleYear10

990

Annual Return 2003

rr_AnnualReturn2003

34.58%

Annual Return 2004

rr_AnnualReturn2004

11.19%

Annual Return 2005

rr_AnnualReturn2005

13.92%

Annual Return 2006

rr_AnnualReturn2006

8.52%

Annual Return 2007

rr_AnnualReturn2007

22.43%

Annual Return 2008

rr_AnnualReturn2008

(48.97%)

Annual Return 2009

rr_AnnualReturn2009

37.40%

Annual Return 2010

rr_AnnualReturn2010

23.06%

Annual Return 2011

rr_AnnualReturn2011

(0.80%)

Annual Return 2012

rr_AnnualReturn2012

19.31%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest quarterly return:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2010

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

17.40%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest quarterly return:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(26.29%)

Average Annual Returns, Label

rr_AverageAnnualReturnLabel

M Large Cap Growth Fund

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

19.31%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.42%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

8.75%

M Large Cap Growth Fund (Prospectus Summary) | M Large Cap Growth Fund | Russell 1000 Growth Index

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, Label

rr_AverageAnnualReturnLabel

Russell 1000 Growth Index

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

15.25%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.13%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.53%

[1] For the period from May 1, 2013 to April 30, 2014, the Adviser has contractually agreed to reimburse the Fund for certain operating expenses (other than advisory fees, brokerage or other portfolio transaction expenses or expenses for litigation, indemnification, taxes or other extraordinary expenses) to the extent that such expenses exceed 0.25% of the Fund's annualized average daily net assets.

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M Capital Appreciation Fund (Prospectus Summary) | M Capital Appreciation Fund

M CAPITAL APPRECIATION FUND

Investment Goal

The Fund seeks maximum capital appreciation.

Fund Fees and Expenses

The fees and expenses reflected in the table below do not include the fees and charges associated with variable annuities, variable life insurance, or qualified retirement plans. Fees and charges for life insurance and annuity products typically include a sales load and/or a surrender charge and other charges for insurance benefits. If these fees and charges were included, the costs shown below would be higher.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)

Annual Fund Operating Expenses		M Capital Appreciation Fund
Management Fees		0.90%
Distribution (12b-1) Fee		none
Other Expenses	[1]	0.20%
Total Annual Fund Operating Expenses		1.10%

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund 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 hypothetical 5% return each year and that the Fund's operating expenses remain the same. These expense examples do not reflect the fees and charges imposed by the applicable insurance company or retirement plan. If these fees and charges were included, the costs shown below would be higher. Although your actual costs (and returns) may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	Expense Example, With Redemption, 1 Year	Expense Example, With Redemption, 3 Years	Expense Example, With Redemption, 5 Years	Expense Example, With Redemption, 10 Years
M Capital Appreciation Fund	112	350	606	1,340

Portfolio Turnover

The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 21% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests in common stock of U.S. companies of all sizes, with emphasis on stocks of companies with capitalizations that are consistent with the capitalizations of those companies found in the Russell 2500 Index.

The Fund's sub-adviser, Frontier Capital Management Company, LLC ("Frontier") seeks to invest in companies with unrecognized earnings potential. Earnings per share, growth and price appreciation are important factors. Wall Street analysts do not usually widely follow small to mid-sized companies like those in which the Fund invests, and institutional investors usually do not own a large percentage of them. The cornerstone of Frontier's investment process is internally generated fundamental research.

Stocks are sold if earnings growth potential is realized, when the fundamental reasons for purchase are no longer valid, or when a more attractive situation is identified.

Principal Investment Risks

As with any mutual fund, there is no guarantee that the Fund will achieve its goals. The Fund's share price will fluctuate which, means you could lose money on your investment in the Fund. The Fund's investment performance could be worse than other investments:

•  if the stock market as a whole goes down;

•  if the market values the stocks in the Fund's portfolio lower than Frontier believes they should be valued;

•  if earnings growth estimates of companies the Fund invests in are not achieved; or

•  because securities of smaller-capitalization companies may be more thinly traded and may have more frequent and larger price changes than securities of larger-capitalization companies.

Performance

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for each of the last ten calendar years and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., the Russell 2500 Index). The performance information shown here does not reflect fees that are paid by the insurance company separate accounts that invest in the Fund. Inclusion of those fees would reduce the total return figures for all periods. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Calendar Year Total Returns

Highest quarterly return:  23.54% (for the quarter ended 6/30/03)

Lowest quarterly return:  (29.48)% (for the quarter ended 12/31/08)

Average Annual Total Returns (for the periods ended December 31, 2012)

The table below shows the Fund's average annual total returns for the periods indicated, and how those returns compare to those of the Russell 2500 Index. You cannot invest directly in an index. The Index is calculated on a total return basis and reflects no deduction for fees, expenses or taxes.

Average Annual Total Returns	Average Annual Returns, Label	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
M Capital Appreciation Fund	M Capital Appreciation Fund	17.43%	3.58%	11.78%
Russell 2500 Index	Russell 2500 Index	17.88%	4.34%	10.48%

[1] For the period from May 1, 2013 to April 30, 2014, the Adviser contractually agreed to reimburse the Fund for certain operating expenses (other than advisory fees, brokerage or other portfolio transaction expenses or expenses for litigation, indemnification, taxes or other extraordinary expenses) to the extent that such expenses exceed 0.25% of the Fund's annualized average daily net assets.

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M Large Cap Value Fund (Prospectus Summary) | M Large Cap Value Fund

M LARGE CAP VALUE FUND

Investment Goal

The Fund seeks long-term capital appreciation.

Fund Fees and Expenses

The fees and expenses reflected in the table below do not include the fees and charges associated with variable annuities, variable life insurance, or qualified retirement plans. Fees and charges for life insurance and annuity products typically include a sales load and/or a surrender charge and other charges for insurance benefits. If these fees and charges were included, the costs shown below would be higher.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investments)

Annual Fund Operating Expenses		M Large Cap Value Fund
Management Fees	[1]	0.45%
Distribution (12b-1) Fee		none
Other Expenses		0.29%
Total Annual Fund Operating Expenses		0.74%
Less Expense Reimbursement	[2]	0.04%
Net Expenses		0.70%

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund 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 hypothetical 5% return each year and that the Fund's operating expenses remain the same. These expense examples do not reflect the fees and charges imposed by the applicable insurance company or retirement plan. If these fees and charges were included, the costs shown below would be higher. Although your actual costs (and returns) may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	Expense Example, With Redemption, 1 Year	Expense Example, With Redemption, 3 Years	Expense Example, With Redemption, 5 Years	Expense Example, With Redemption, 10 Years
M Large Cap Value Fund	72	233	408	915

Portfolio Turnover

The Fund 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 41% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests primarily in equity securities of U.S. issuers in the large-capitalization segment of the U.S. stock market.

The Fund's sub-adviser, AJO, LP ("AJO"), uses a systematic, disciplined, quantitative investment process. AJO is value-oriented, but believes superior results are best achieved by combining value, management (quality and growth), and momentum. Its work holds security analysis to be most productive when relative value is gauged on an industry or peer-group basis. As such, peer-group valuation and diversification constitute important aspects of its process. AJO focuses on well-managed companies with quality cash profits, relatively low market valuations, and positive price and earnings momentum. It optimizes portfolios to diversify multi-faceted risk. AJO screens every stock that trades on a major U.S. exchange for companies that have significant operating history and sufficient liquidity, while considering suitability for its investment process (no bankruptcies, ADRs, gold stocks, or funds). AJO then evaluates each company through a process that captures its philosophy. A particular strategy is built and security weights are driven by combining AJO's estimates of excess expected return and its assessment of risk for each individual security. The Fund is fully invested, sector-neutral, and well diversified in terms of industry, fundamental characteristics, and various statistical measures of risk. Individual security active weights are controlled to 1.2% above the weight in the benchmark, the Russell 1000 Value Index. The result is a portfolio with 80+ names. AJO seeks to minimize implementation shortfall, defined as the difference between valuation price and execution price, including commissions, spreads, market impact, and opportunity cost.

Principal Investment Risks

As with any mutual fund, there is no guarantee that the Fund will achieve its goals. The Fund's share price will fluctuate, which means you could lose money on your investment in the Fund. The Fund's investment performance could be worse than other investments:

•  if the stock market as a whole goes down;

•  if the stocks the Fund invests in underperform other investments;

•  if AJO's value, management and momentum factors do not correctly identify companies with above-market return potential; or

•  if AJO's quantitative investment process otherwise fails to perform as intended.

Performance

The following information may give some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year since inception and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance (i.e., Russell 1000 Value Index). The performance prior to May 1, 2013 reflects the performance results obtained under a different sub-adviser using different investment strategies. Had the current sub-adviser and investment strategies been in place during the period shown, the performance results may have been different. The performance information shown here does not reflect fees that are paid by the insurance company separate accounts that invest in the Fund. Inclusion of those fees would reduce the total return figures for all periods. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.

Calendar Year Total Returns

Highest quarterly return:  15.25% (for the quarter ended 6/30/03)

Lowest quarterly return:  (21.13)% (for the quarter ended 12/31/08)

Average Annual Total Returns (for the periods ended December 31, 2012)

The table below shows the Fund's average annual total returns for the periods indicated, and how those returns compare to those of the Russell 1000 Value Index. You cannot invest directly in an index. The Index is calculated on a total return basis and reflects no deduction for fees, expenses or taxes.

Average Annual Total Returns	Average Annual Returns, Label	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
M Large Cap Value Fund	M Large Cap Value Fund	17.29%	0.06%	7.52%
Russell 1000 Value Index	Russell 1000 Value Index	17.51%	0.59%	7.38%

[1] Restated to reflect current fees. Due to the change in the sub-adviser of the Fund, which was effective May 1, 2013, the advisory fee payable to the Adviser decreased from 0.65% of the first $50 million, 0.60% of the next $50 million, 0.55% of the next $100 million and 0.50% thereafter of the Fund's average daily net assets to 0.45% of the first $250 million, 0.35% of the next $250 million, 0.30% of the next $250 million and 0.275% thereafter of the Fund's average daily net assets.

[2] For the period from May 1, 2013 to April 30, 2014, the Adviser contractually agreed to reimburse the Fund for certain operating expenses (other than advisory fees, brokerage or other portfolio transaction expenses or expenses for litigation, indemnification, taxes or other extraordinary expenses) to the extent that such expenses exceed 0.25% of the Fund's annualized average daily net assets.