Alliant EVP granted stock, with shares withheld for tax

Alliant Energy Executive Vice President Raja Sundararajan reported equity compensation transactions in company common stock.

Rhea-AI Filing Summary

Alliant Energy Executive Vice President Raja Sundararajan reported equity compensation transactions in company common stock. He acquired 18,768 and 8,784 shares through grants at a price of $0.0000 per share, reflecting stock-based awards. A portion of these awards represents restricted stock units that convert to common stock on a one-to-one basis and vest on December 31, 2028. To cover tax obligations on the awards, 11,324 shares were disposed of at $70.0100 per share under a tax-withholding arrangement. After these transactions, he continues to hold common stock directly.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Sundararajan Raja

Role Executive Vice President

Type	Security	Shares	Price	Value
Grant/Award	Common Stock .	18,768	$0.00	$0.00
Grant/Award	Common Stock .	8,784	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock .	11,324	$70.01	$793K

Holdings After Transaction: Common Stock . — 33,050 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

What did Alliant Energy (LNT) executive Raja Sundararajan report on this Form 4?

Raja Sundararajan reported stock-based compensation activity, including grants of company common stock and a related share disposition for taxes. These transactions reflect routine executive equity awards rather than open-market purchases or sales, and they adjust his directly held share balance accordingly.

How many Alliant Energy (LNT) shares were granted to Raja Sundararajan?

He received grants totaling 18,768 and 8,784 shares of Alliant Energy common stock at a stated price of $0.0000 per share. These awards represent equity compensation rather than cash investments and increase his direct ownership position in the company’s stock.

Why did Raja Sundararajan dispose of Alliant Energy (LNT) shares in this filing?

He disposed of 11,324 shares at $70.0100 per share to satisfy tax withholding obligations tied to his stock awards. This type of transaction is coded as a tax-withholding disposition and does not represent an open-market sale decision.

What are the restricted stock units (RSUs) mentioned for Alliant Energy (LNT)?

The filing notes restricted stock units that convert into Alliant Energy common stock on a one-to-one basis when vested. These RSUs are scheduled to vest on December 31, 2028, providing the executive with future share delivery subject to continued service or applicable conditions.

Is Raja Sundararajan’s Form 4 activity in Alliant Energy (LNT) a buy or a sell?

The activity is mixed, with share grants and a tax-driven disposition. He acquired shares through equity awards at no cash cost and simultaneously had 11,324 shares withheld at $70.0100 per share to cover tax liabilities associated with those awards.

How does this Alliant Energy (LNT) Form 4 affect Raja Sundararajan’s ownership?

The grants increase his direct stake in Alliant Energy common stock, while the tax-withholding disposition reduces it by 11,324 shares. Overall, his ownership remains significant, and the transactions align with typical executive compensation practices using equity awards.

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

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Accepted by SEC EDGAR 02/23/2026 - 07:08 PM Learn about SEC filing dates

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^*

Sundararajan Raja

(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		18,768	A	$0	35,590	D
Common Stock .	02/19/2026		A		8,784(1)	A	$0	44,374	D
Common Stock .	02/19/2026		F		11,324	D	$70.01	33,050	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.