Alliant Energy director awarded 547 deferred stock units

ALLIANT ENERGY CORP director Stephanie Cox received an award of 547.1960 Deferred Common Stock Units on April 10, 2026.

Rhea-AI Filing Summary

ALLIANT ENERGY CORP director Stephanie Cox received an award of 547.1960 Deferred Common Stock Units on April 10, 2026. The units are linked to a reference price of $73.1000 per unit and are structured as derivative securities tied to the company’s common stock.

Each deferred unit corresponds to 1 share of common stock, so the award relates to 547.1960 underlying shares. After this grant, Cox directly holds a total of 17,253.4510 deferred units. According to the terms, these units will be settled in shares of common stock when her service as a director ends.

The reported holdings also reflect adjustments for accrued dividends, which were credited through a dividend reinvestment transaction that is exempt from Section 16 under Rule 16a-11. The filing shows no open‑market buying or selling, only this grant/award acquisition of deferred units.

Insider Trade Summary

Grant/Award: 547.196 shares

Grant/Award 1 txn

Insider Cox Stephanie

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Deferred Common Stock Units	547.196	$73.10	$40K

Holdings After Transaction: Deferred Common Stock Units — 17,253.451 contracts (Direct)

Footnotes (2)

1. F1. Units are to be settled in shares of common stock upon the reporting person's termination of services as a director.
2. F2. Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.

Key Figures

Deferred units granted: 547.1960 units Reference price per unit: $73.1000 per unit Deferred units after transaction: 17,253.4510 units +1 more

4 metrics

Deferred units granted 547.1960 units Deferred Common Stock Units awarded on April 10, 2026

Reference price per unit $73.1000 per unit Price used for the deferred unit award

Deferred units after transaction 17,253.4510 units Total Deferred Common Stock Units held following the grant

Underlying common shares 547.1960 shares Common Stock underlying the new deferred unit award

Key Terms

Deferred Common Stock Units, derivative, Section 16, dividend reinvestment transaction, +1 more

5 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.

derivative financial

"transaction_type: "derivative""

A derivative is a financial contract whose value depends on the price or performance of another asset or measure — for example a stock, index, interest rate, commodity, or currency. Investors use derivatives like insurance or leveraged bets to hedge risk, speculate, or gain exposure without owning the underlying asset; they can protect portfolios but also amplify losses and introduce counterparty and market risk.

Section 16 regulatory

"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.

dividend reinvestment transaction financial

"pursuant to a dividend reinvestment transaction exempt from Section 16"

A dividend reinvestment transaction is when an investor uses cash dividends paid by a company to automatically buy more of that company's shares instead of taking the money as cash. Like choosing to roll interest back into a savings account, it increases your share count over time and can speed up growth through compounding, so investors care because it changes ownership stake, long‑term returns, and sometimes tax or record‑keeping implications.

Rule 16a-11 regulatory

"exempt from Section 16 under Rule 16a-11"

FAQ

What did Alliant Energy (LNT) director Stephanie Cox report in this Form 4?

Stephanie Cox reported receiving 547.1960 Deferred Common Stock Units linked to Alliant Energy common stock. These units were granted as a derivative award and increase her total deferred holdings to 17,253.4510 units, with no open-market share purchases or sales disclosed.

How many deferred units does Stephanie Cox hold after this Alliant Energy (LNT) transaction?

After this transaction, Stephanie Cox holds 17,253.4510 Deferred Common Stock Units. This total includes the new 547.1960-unit award and prior balances, as well as adjustments for accrued dividends credited through a dividend reinvestment transaction exempt under Rule 16a-11.

At what reference price were Stephanie Cox’s Deferred Common Stock Units recorded for Alliant Energy (LNT)?

The 547.1960 Deferred Common Stock Units were recorded at a reference price of $73.1000 per unit. This price is used for reporting purposes in the derivative grant and reflects the value used to determine the size of the award.

When will Stephanie Cox’s Alliant Energy (LNT) deferred units be settled into common stock?

The deferred units will be settled in shares of Alliant Energy common stock upon Stephanie Cox’s termination of services as a director. Settlement timing therefore depends on when her board service ends, rather than on any near-term vesting or trading event.

Does this Alliant Energy (LNT) Form 4 show any open-market stock purchases or sales by Stephanie Cox?

No, the Form 4 shows only a grant of Deferred Common Stock Units classified as a derivative acquisition. The filing does not report any open-market purchases or sales of Alliant Energy common stock by Stephanie Cox on the disclosed transaction date.

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Accepted by SEC EDGAR 04/14/2026 - 04:22 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^*

Cox Stephanie

(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		547.196		(1)	(1)	Common Stock	547.196	$73.1	17,253.451(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)