MML Mid Cap Growth Fund
MML SERIES INVESTMENT FUND
Expense ratio
Net assets1
$352.01M
Holdings1
117
Category
US Equity
Return

Investment objective & strategy

As of April 24, 2025 · prospectus

Objective. This Fund seeks long-term capital appreciation.

Strategy. Principal Investment Strategies The Fund invests primarily in equity securities of mid-capitalization companies that the Funds subadviser, T. Rowe Price Associates, Inc. (T. Rowe Price), and sub-subadviser, T. Rowe Price Investment Management, Inc. (T. Rowe Price Investment Management), believe offer the potential for above-average earnings growth. Equity securities may include common stocks, preferred stocks, securities convertible into common or preferred stock, rights, and warrants. Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in a broadly diversified portfolio of common stocks of mid-cap companies whose earnings the Funds subadvisers expect to grow at a faster rate than the average company. T. Rowe Price and T. Rowe Price … Principal Investment Strategies The Fund invests primarily in equity securities of mid-capitalization companies that the Funds subadviser, T. Rowe Price Associates, Inc. (T. Rowe Price), and sub-subadviser, T. Rowe Price Investment Management, Inc. (T. Rowe Price Investment Management), believe offer the potential for above-average earnings growth. Equity securities may include common stocks, preferred stocks, securities convertible into common or preferred stock, rights, and warrants. Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in a broadly diversified portfolio of common stocks of mid-cap companies whose earnings the Funds subadvisers expect to grow at a faster rate than the average company. T. Rowe Price and T. Rowe Price Investment Management currently define mid-cap companies as those whose market capitalizations at the time of purchase fall within the market capitalization range of companies included in either the S&P MidCap 400 Index or the Russell Midcap Growth Index (as of February 28, 2025, between $555.98 million and $82.33 billion). The Fund may invest up to 20% of its net assets in stocks whose market capitalizations at the time of investment are outside of that capitalization range. The Fund typically invests most of its assets in equity securities of U.S. companies, but may invest in foreign securities and American Depositary Receipts (ADRs), including emerging market securities. The Funds investments may include holdings in privately held companies and companies that only recently began to trade publicly. The Fund may at times have significant exposure to one or more industries or sectors. The Fund may hold a portion of its assets in cash or cash equivalents. In selecting securities for the Fund, T. Rowe Price and T. Rowe Price Investment Management generally use a growth approach, seeking to identify companies that they believe have proven products or services, a record of above-average earnings growth, demonstrated potential to sustain earnings growth, stock prices that appear to undervalue their growth prospects, or a connection to industries experiencing increasing demand. In pursuing the Funds investment objective, T. Rowe Price and T. Rowe Price Investment Management have the discretion to purchase some securities that do not meet those investment criteria when they believe there is an opportunity for substantial appreciation (such as, for example, T. Rowe Price or T. Rowe Price Investment Management believes a security could increase in value as a result of a change in management, an extraordinary corporate event, a new product introduction or innovation, or a favorable competitive development). T. Rowe Price or T. Rowe Price Investment Management may sell assets for a variety of reasons, including in response to a change in the original investment considerations or to limit losses, adjust the characteristics of the overall portfolio, or redeploy assets into different opportunities.

Top holdings

As of March 31, 2026 · N-PORT
SecurityTickerValue% of fund
FIXED INC CLEARING CORP.REPO $10.01M 2.84%
HILTON WORLDWIDE HOLDINGS INC $9.58M 2.72%
AGILENT TECHNOLOGIES INC $7.63M 2.17%
LATTICE SEMICONDUCTOR CORP $7.44M 2.11%
METTLER-TOLEDO INTL INC $6.88M 1.95%
VIKING HOLDINGS LTD $6.87M 1.95%
KEYSIGHT TECHNOLOGIES INC $6.46M 1.83%
YUM! BRANDS INC $6.43M 1.83%
BURLINGTON STORES INC $6.34M 1.80%
PTC INC $6.27M 1.78%
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Allocation by sector

As of March 31, 2026 · N-PORT
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Portfolio moves

Dec 31, 2025 → Mar 31, 2026
Opened
12
Exited
23
Increased
53
Decreased
32
Unchanged
20

How many positions this fund opened, exited, grew, trimmed, or left unchanged between its two most recent N-PORT snapshots — net changes between point-in-time reports, not a trade log.

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Advisers

As of December 31, 2025 · N-CEN
FirmRole
MML Investment Advisers, LLC Adviser
T. Rowe Price Associates, Inc. Sub-adviser

Footnotes

  1. Net assets and holdings count as of March 31, 2026, from the fund's N-PORT filing.

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