Sec Form 3 Filing - Mastoris William @ WEC ENERGY GROUP, INC. - 2021-12-01

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Mastoris William 2. Issuer Name and Ticker or Trading Symbol WEC ENERGY GROUP, INC. [ WEC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP-Cust. Svc. and Operations (Last) (First) (Middle) 231 WEST MICHIGAN STREET 3. Date of Earliest Transaction (MM/DD/YY) 12/01/2021 (Street) MILWAUKEE, WI53203 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 1,759 D Common Stock 2,869.373( 1 ) I ERSP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Phantom Stock Units ( 3 ) ( 2 ) ( 2 ) Common Stock 2,421.0763 D Stock Option (right to buy) $ 52.895 01/02/2018 01/02/2025 Common Stock 1,345 D Stock Option (right to buy) $ 50.925 01/04/2019 01/04/2026 Common Stock 3,345 D Stock Option (right to buy) $ 58.305 01/03/2020 01/03/2027 Common Stock 3,980 D Stock Option (right to buy) $ 66.015 01/02/2021 01/02/2028 Common Stock 3,685 D Stock Option (right to buy) $ 68.175 01/02/2022 01/02/2029 Common Stock 3,733 D Stock Option (right to buy) $ 91.4875 01/02/2023 01/02/2030 Common Stock 3,785 D Stock Option (right to buy) $ 91.06 01/04/2024 01/04/2031 Common Stock 3,901 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Mastoris William 231 WEST MICHIGAN STREET MILWAUKEE, WI53203 EVP-Cust. Svc. and Operations Signatures Joshua M. Erickson, as attorney in fact 12/07/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The number of shares in the WEC Employee Retirement Savings Plan attributable to any one participant varies with the price of the Common Stock. The information in this report is based on a plan statement dated as of December 1, 2021. ( 2 )These phantom stock units were accrued under the WEC Executive Deferred Compensation Plan and are to be settled in accordance with the terms of the plan. ( 3 )One-for-one.

Remarks: Exhibit List: Exhibit 24-Power of Attorney

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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