Alliant Energy (LNT) VP has 438 shares withheld to cover RSU taxes

Rhea-AI Filing Summary

Alliant Energy Corp vice president Rebecca C. Valcq reported a routine tax-withholding transaction involving company stock. On February 19, 2026, 438 shares of Alliant Energy common stock were withheld by the company at $70.01 per share to cover tax obligations tied to the vesting and settlement of restricted stock units. The footnote clarifies this was not an open-market sale by Valcq. After this withholding, she directly held 2,335 shares of Alliant Energy common stock.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Valcq Rebecca C.

(Last) (First) (Middle)

C/O ALLIANT ENERGY CORPORATION

4902 N. BILTMORE LANE

(Street)

MADISON WISCONSIN 53718

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ALLIANT ENERGY CORP [ LNT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Vice President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
02/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)
02/23/2026

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	02/19/2026		F(1)		438	D	$70.01	2,335	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of restricted stock units and does not represent a sale by the Reporting Person.

Remarks:

This Form 4/A is being filed to disclose shares withheld to satisfy tax withholding obligations which were inadvertently omitted from the original Form 4 filing.

	/s/ Jake C. Blavat, Attorney-in-Fact	03/19/2026
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Alliant Energy (LNT) report for Rebecca C. Valcq?

Alliant Energy vice president Rebecca C. Valcq reported a tax-related share disposition. On February 19, 2026, 438 common shares were withheld by the company to satisfy tax obligations from vesting restricted stock units, rather than sold on the open market.

Was the Alliant Energy (LNT) Form 4/A transaction an open-market sale?

No, the Form 4/A specifies this was not an open-market sale. The 438 shares were withheld by Alliant Energy solely to cover tax withholding obligations upon vesting and settlement of restricted stock units granted to Rebecca C. Valcq.

How many Alliant Energy (LNT) shares were involved in Rebecca Valcq’s tax withholding?

The filing shows 438 Alliant Energy common shares were withheld. The shares were valued at $70.01 per share for tax purposes, in connection with the vesting and settlement of restricted stock units, and did not represent a discretionary stock sale.

How many Alliant Energy (LNT) shares does Rebecca C. Valcq hold after this Form 4/A?

After the reported tax-withholding transaction, Rebecca C. Valcq directly holds 2,335 Alliant Energy common shares. This figure reflects her position following the 438-share withholding used to satisfy tax obligations on vesting restricted stock units.

What does transaction code F mean in the Alliant Energy (LNT) insider filing?

Transaction code F indicates shares were disposed of to pay an exercise price or tax liability. Here, 438 Alliant Energy shares were withheld by the issuer to meet tax obligations linked to restricted stock units, not sold by the executive in the market.