Alliant SVP granted stock, withholds shares for tax

Alliant Energy Corp Senior Vice President David A. de Leon reported equity awards and related tax withholding transactions in company stock.

Rhea-AI Filing Summary

Alliant Energy Corp Senior Vice President David A. de Leon reported equity awards and related tax withholding transactions in company stock. On February 19, 2026, he acquired 8,616 and 2,306 shares of common stock as grants, including restricted stock units that convert one-to-one into common shares and vest on December 31, 2028. On the same date, 5,207 shares were disposed of at $70.01 per share to cover tax liabilities. Following these transactions, he directly held 47,708.260 shares, plus 2,278.524 shares held indirectly through a 401(k) plan as of the filing date.

Insider Trade Summary

4 transactions reported

Mixed 4 txns

Insider de Leon David A

Role Senior Vice President

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	8,616	$0.00	$0.00
Grant/Award	Common Stock	2,306	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	5,207	$70.01	$365K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 47,708.26 shares (Direct); Common Stock — 2,278.524 shares (Indirect, by 401(k) Plan)

Footnotes (3)

1. F1. Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.
2. F2. 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.
3. F3. Reflects 401(k) holdings as of this filing date.

FAQ

What insider transactions did Alliant Energy (LNT) report for David A. de Leon?

Alliant Energy reported that Senior Vice President David A. de Leon received two stock grants totaling 10,922 common shares and had 5,207 shares withheld to satisfy tax obligations. These movements were recorded as equity awards and tax-withholding dispositions, not open-market purchases or sales.

How many Alliant Energy (LNT) shares did David A. de Leon receive as awards?

David A. de Leon received equity awards of 8,616 and 2,306 Alliant Energy common shares on February 19, 2026. Some of these represent restricted stock units that convert into common stock on a one-to-one basis when vested, with vesting scheduled on December 31, 2028.

Why were 5,207 Alliant Energy (LNT) shares disposed of in this Form 4?

The Form 4 shows 5,207 Alliant Energy common shares disposed of at $70.01 per share to pay taxes. This disposition is classified as a tax-withholding transaction, where shares are delivered to cover tax liabilities on previously granted equity awards.

What is David A. de Leon’s Alliant Energy (LNT) share ownership after these transactions?

After the reported transactions, David A. de Leon directly owned 47,708.260 Alliant Energy common shares. He also held 2,278.524 additional shares indirectly through a 401(k) plan, with those retirement-plan holdings reported as of the filing date.

When do David A. de Leon’s Alliant Energy (LNT) restricted stock units vest?

The restricted stock units reported for David A. de Leon convert into Alliant Energy common stock on a one-to-one basis upon vesting. According to the filing, these RSUs are scheduled to vest on December 31, 2028, subject to their award terms.

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Accepted by SEC EDGAR 02/23/2026 - 07:13 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^*

de Leon David A

(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)
	Senior 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		8,616	A	$0	50,609.26(1)	D
Common Stock	02/19/2026		A		2,306(2)	A	$0	52,915.26	D
Common Stock	02/19/2026		F		5,207	D	$70.01	47,708.26	D
Common Stock								2,278.524(3)	I	by 401(k) Plan

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. Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.

2. 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.

3. Reflects 401(k) holdings as of this filing date.

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.