Alliant Energy (LNT) EVP receives RSU grants and withholds shares for tax

Rhea-AI Filing Summary

Alliant Energy executive vice president Antonio P. Smyth reported stock-based awards and related tax withholding in company common stock. He acquired 13,114 and 5,240 shares as grants at no cash price, both representing restricted stock units that convert one-to-one into shares when vested. A separate disposition of 6,226 shares at $70.01 per share was made to cover tax obligations. The RSUs vest on December 31, 2028, leaving him with 21,855 shares held directly after these transactions.

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^*

Smyth Antonio P

(Last) (First) (Middle)

C/O ALLIANT ENERGY CORPORATION

4902 N. BILTMORE LANE

(Street)

MADISON WI 53718

(City) (State) (Zip)

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)
	Executive Vice President

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

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

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

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

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		A		13,114	A	$0	22,841	D
Common Stock	02/19/2026		A		5,240(1)	A	$0	28,081	D
Common Stock	02/19/2026		F		6,226	D	$70.01	21,855	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 restricted stock units (RSUs) which are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2028.

Remarks:

	/s/ Jake C. Blavat, Attorney-in-Fact	02/23/2026
	** 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.

FAQ

What insider transactions did Alliant Energy (LNT) report for Antonio P. Smyth?

Alliant Energy reported that executive vice president Antonio P. Smyth received two grants of common stock totaling 18,354 shares and had 6,226 shares withheld at $70.01 per share to cover tax obligations related to these stock-based awards.

What type of shares did Antonio P. Smyth receive in the latest Alliant Energy Form 4?

Antonio P. Smyth received restricted stock units (RSUs) in Alliant Energy common stock, in amounts of 13,114 and 5,240 shares. These RSUs convert into common shares on a one-to-one basis when they vest, providing stock-based compensation rather than a cash bonus.

When do Antonio P. Smyth’s Alliant Energy RSUs reported on Form 4 vest?

The restricted stock units granted to Antonio P. Smyth vest on December 31, 2028. Once vested, each RSU converts into one share of Alliant Energy common stock, increasing his share ownership without requiring a purchase price payment at vesting.

Why were 6,226 Alliant Energy shares disposed of in Antonio P. Smyth’s Form 4?

The 6,226 Alliant Energy shares were disposed of at $70.01 per share to satisfy tax withholding obligations. This transaction is classified as a tax-withholding disposition, meaning shares were withheld rather than sold in an open-market transaction.

How many Alliant Energy shares does Antonio P. Smyth hold after these Form 4 transactions?

After the reported grants and tax-withholding disposition, Antonio P. Smyth directly holds 21,855 Alliant Energy common shares. This figure reflects his updated direct ownership following the RSU awards and the related share disposition for tax obligations.

Were Antonio P. Smyth’s recent Alliant Energy transactions open-market buys or sells?

The transactions were not open-market trades. They consisted of stock-based compensation grants, recorded as acquisitions at a price of $0.00, and a tax-withholding disposition of 6,226 shares at $70.01 per share to cover related tax liabilities.