Alliant Energy (LNT) CAO awarded RSUs and withholds shares for taxes

Rhea-AI Filing Summary

Alliant Energy Corp CAO and Controller Dylan Syse reported equity compensation activity in company common stock. On February 19, 2026, he acquired 1,063 and 750 restricted stock units (RSUs), which each convert to one common share when vested. The RSUs vest on December 31, 2028.

On the same date, 506 common shares were disposed of in a tax-withholding transaction at $70.01 per share, satisfying tax obligations related to the award. After these transactions, Syse directly held 4,020.054 shares of Alliant Energy common stock.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Syse Dylan

Role CAO and Controller

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	1,063	$0.00	--
Grant/Award	Common Stock	750	$0.00	--
Tax Withholding	Common Stock	506	$70.01	$35K

Holdings After Transaction: Common Stock — 3,776.054 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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^*

Syse Dylan

(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)
	CAO and Controller

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		1,063	A	$0	3,776.054	D
Common Stock	02/19/2026		A		750(1)	A	$0	4,526.054	D
Common Stock	02/19/2026		F		506	D	$70.01	4,020.054	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 Dylan Syse?

Alliant Energy CAO Dylan Syse reported RSU grants and a tax-related share disposition. He received 1,063 and 750 restricted stock units and had 506 shares withheld to cover tax obligations, ending with 4,020.054 directly owned common shares.

Were Dylan Syse’s Alliant Energy (LNT) transactions open-market buys or sells?

The filing shows no open-market buys or sells. Syse’s acquisitions were equity awards of restricted stock units, and the disposition was a tax-withholding transaction where 506 shares were delivered to satisfy tax liabilities tied to the stock awards.

When do Dylan Syse’s Alliant Energy (LNT) RSUs vest?

The restricted stock units reported for Dylan Syse vest on December 31, 2028. Each RSU converts into one share of Alliant Energy common stock upon vesting, aligning his compensation with long-term company performance and shareholder value over this multi-year period.

How many Alliant Energy (LNT) shares does Dylan Syse own after these transactions?

After the reported transactions, Dylan Syse directly owns 4,020.054 shares of Alliant Energy common stock. This figure reflects both the RSU-related activity on February 19, 2026, and the 506-share tax-withholding disposition recorded on the same date.

What price was used for the tax-withholding share disposition at Alliant Energy (LNT)?

The tax-withholding disposition was recorded at $70.01 per share for 506 shares. This transaction was coded as “F,” indicating shares were delivered to pay tax liabilities associated with Syse’s equity awards rather than a discretionary market sale.