Alliant CEO reports RSU grants and tax share disposal

Alliant Energy President and CEO Lisa M. Barton reported equity compensation changes involving the company’s common stock.

Accepted by SEC EDGAR 02/23/2026 - 07:15 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Alliant Energy President and CEO Lisa M. Barton reported equity compensation changes involving the company’s common stock. On February 19, 2026, she acquired 47,533 and 29,527 shares through grant/award acquisitions, both at a stated price of $0.00 per share.

The filing also shows a tax-withholding disposition of 28,594 shares at $70.01 per share to satisfy tax obligations. A related footnote explains that these awards are restricted stock units that convert into common stock on a one-to-one basis and vest on December 31, 2028.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Barton Lisa M

Role President and CEO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	47,533	$0.00	$0.00
Grant/Award	Common Stock	29,527	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	28,594	$70.01	$2.00M

Holdings After Transaction: Common Stock — 107,452 shares (Direct)

Footnotes (1)

1. F1. 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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Alliant Energy (LNT) report for Lisa M. Barton?

Alliant Energy reported that President and CEO Lisa M. Barton received two equity grants totaling 77,060 common shares and had 28,594 shares withheld in a tax-related disposition, all dated February 19, 2026.

Were Lisa M. Barton’s Alliant Energy (LNT) transactions open-market buys or sells?

The filing shows grant/award acquisitions of shares and a tax-withholding disposition, not open-market buying or selling. Shares were granted at a stated price of $0.00, with some shares withheld at $70.01 to cover tax obligations.

What type of equity awards did Lisa M. Barton receive from Alliant Energy (LNT)?

The awards are restricted stock units (RSUs) that convert into Alliant Energy common stock on a one-to-one basis. According to the footnote, these RSUs are scheduled to vest on December 31, 2028, subject to their terms.

When do Lisa M. Barton’s Alliant Energy (LNT) RSUs vest?

The RSUs referenced in the filing are scheduled to vest on December 31, 2028. At vesting, they convert to Alliant Energy common stock on a one-to-one basis, as described in the footnote to the reported transactions.

How many Alliant Energy (LNT) shares were used to cover Lisa M. Barton’s taxes?

The filing reports a tax-withholding disposition of 28,594 common shares at a price of $70.01 per share. This disposition was characterized as payment of tax liability by delivering securities, not as an open-market sale.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Barton Lisa M

(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)

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

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		47,533	A	$0	106,519	D
Common Stock	02/19/2026		A		29,527(1)	A	$0	136,046	D
Common Stock	02/19/2026		F		28,594	D	$70.01	107,452	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).
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