Invesco Energy Fund (IENAX) DEFA14A Additional proxy soliciting materials

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities
Exchange Act of 1934

Filed by the Registrantþ
Filed by a Party other than the Registranto

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o Preliminary Proxy Statement

o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

o Definitive Proxy Statement

þ Definitive Additional Materials

o Soliciting Material Pursuant to §240.14a-11(c) or §240.14a-12

AIM COUNSELOR SERIES TRUST (INVESCO COUNSELOR SERIES FUND)
AIM EQUITY FUNDS (INVESCO EQUITY FUNDS)
AIM FUNDS GROUP (INVESCO FUNDS GROUP)
AIM GROWTH SERIES (INVESCO GROWTH SERIES)
AIM INVESTMENT FUNDS (INVESCO INVESTMENT FUNDS)
AIM INVESTMENT SECURITIES FUNDS (INVESCO INVESTMENT SECURITIES FUNDS)
AIM SECTOR FUNDS (INVESCO SECTOR FUNDS)
AIM TAX-EXEMPT FUNDS (INVESCO TAX-EXEMPT FUNDS)
AIM VARIABLE INSURANCE FUNDS (INVESCO VARIABLE INSURANCE FUNDS)

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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Shareholder Votes Needed

Proxy statements were recently mailed for several Invesco Funds as part of a plan to reorganize Invesco’s U.S. mutual fund lineup. Invesco believes this change will enhance their offering and better enable Invesco to deliver strong, consistent investment results over the long term. Please encourage shareholders in Invesco Funds to vote in the current proxy campaign which will, if approved by shareholders, provide significant product line clarity and position the funds for better scale leading to improved expense ratios for many shareholders.

• Invesco Product Line Reorganization

• Invesco Prime Income Trust Reorganization

• Proxy Voting Information