Alliant Energy (LNT) director receives deferred stock unit award tied to shares

Rhea-AI Filing Summary

ALLEN PATRICK E reported acquisition or exercise transactions in this Form 4 filing.

Alliant Energy Corp director Patrick E. Allen received a grant of 512.996 Deferred Common Stock Units, each tied to the company’s common stock at an indicated value of $73.10 per unit. These units will be settled in common shares when his board service ends and now bring his total deferred units to 45,514.856. The position also reflects adjustments from accrued dividends through a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider ALLEN PATRICK E

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Deferred Common Stock Units	512.996	$73.10	$38K

Holdings After Transaction: Deferred Common Stock Units — 45,514.856 shares (Direct)

Footnotes (1)

1. Units are to be settled in shares of common stock upon the reporting person's termination of services as a director. Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.

Key Figures

Deferred units granted: 512.996 units Reporting price per unit: $73.10 per unit Deferred units after grant: 45,514.856 units +1 more

4 metrics

Deferred units granted 512.996 units Deferred Common Stock Units granted on 2026-04-10

Reporting price per unit $73.10 per unit Value used for the 512.996 Deferred Common Stock Units grant

Deferred units after grant 45,514.856 units Total Deferred Common Stock Units held directly after transaction

Underlying common stock 512.996 shares Common Stock underlying the new Deferred Common Stock Units

Key Terms

Deferred Common Stock Units, Section 16, Rule 16a-11, dividend reinvestment transaction

4 terms

Deferred Common Stock Units financial

"security_title: "Deferred Common Stock Units""

Deferred common stock units are promises to deliver company shares or cash tied to the company’s stock value at a later date, typically used as part of employee or executive pay. Think of them like a paycheck you elect to receive in company stock at a future date; they can affect the number of shares outstanding and company expenses, so investors watch them for potential dilution and to understand management’s incentives.

Section 16 regulatory

"dividend reinvestment transaction exempt from Section 16 under Rule 16a-11"

Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.

Rule 16a-11 regulatory

"dividend reinvestment transaction exempt from Section 16 under Rule 16a-11"

dividend reinvestment transaction financial

"Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction"

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^*

ALLEN PATRICK E

(Last) (First) (Middle)

C/O ALLIANT ENERGY CORPORATION

4902 N. BILTMORE LANE

(Street)

MADISON WISCONSIN 53718

(City) (State) (Zip)

UNITED STATES

(Country)

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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/10/2026

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

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

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

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

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
Deferred Common Stock Units	$0	04/10/2026	04/10/2026	A		512.996		(1)	(1)	Common Stock	512.996	$73.1	45,514.856(2)	D

Explanation of Responses:

1. Units are to be settled in shares of common stock upon the reporting person's termination of services as a director.

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

Remarks:

	/s/ Omar N. Chaudhary, Attorney-in-Fact	04/14/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Alliant Energy (LNT) report for Patrick E. Allen?

Alliant Energy reported that director Patrick E. Allen received 512.996 Deferred Common Stock Units. These derivative units are tied to Alliant’s common stock and were recorded at $73.10 per unit as a compensation-related grant, not as an open-market share purchase or sale.

How many Alliant Energy deferred stock units does Patrick E. Allen hold after this Form 4?

After this grant, Patrick E. Allen holds 45,514.856 Deferred Common Stock Units directly. This figure reflects his cumulative deferred compensation position, including this 512.996-unit award and prior adjustments, giving a clearer picture of his total deferred equity exposure to Alliant Energy.

When will Patrick E. Allen’s Alliant Energy deferred stock units be settled into shares?

The filing states these Deferred Common Stock Units will be settled in Alliant Energy common stock when Patrick E. Allen’s service as a director terminates. Until that point, they function as deferred, stock-based compensation rather than currently deliverable common shares.

What does the $73.10 price per Deferred Common Stock Unit for Alliant Energy represent?

The Form 4 lists a transaction price of $73.10 per Deferred Common Stock Unit for Patrick E. Allen’s award. This figure is used for reporting and valuation of the grant and does not reflect an open-market trade, since the transaction is a compensation grant, not a market purchase.

How are dividends handled on Patrick E. Allen’s Alliant Energy deferred stock units?

The footnotes explain that his holdings include adjustments for accrued dividends. These adjustments were made through a dividend reinvestment transaction that is exempt from Section 16 under Rule 16a-11, effectively crediting additional value to his deferred units over time.