Alliant Energy (LNT) director receives 750 deferred stock units

Rhea-AI Filing Summary

Alliant Energy Corp director Ignacio A. Cortina reported an automatic award of 749.769 deferred common stock units on January 9, 2026, coded as an acquisition. The units are priced at $65.02 per unit and increase his directly held derivative position to 9,489.019 deferred common stock units. According to the disclosure, these units will be settled in shares of Alliant Energy common stock when Cortina’s service as a director ends, and the reported balance includes adjustments for accrued dividends through a dividend reinvestment feature that is exempt from Section 16 under Rule 16a-11.

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

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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^*

Cortina Ignacio 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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
01/09/2026

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

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	01/09/2026	01/09/2026	A		749.769		(1)	(1)	Deferred Common Stock	749.769	$65.02	9,489.019(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/ Jake C. Blavat, Attorney-in-Fact	01/12/2026
	** 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).
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FAQ

What insider transaction did Alliant Energy (LNT) report for Ignacio A. Cortina?

Director Ignacio A. Cortina reported an acquisition of 749.769 deferred common stock units of Alliant Energy Corp on January 9, 2026, recorded as a derivative security transaction.

How many Alliant Energy deferred stock units does Cortina hold after this Form 4?

After the reported transaction, Ignacio A. Cortina beneficially owns 9,489.019 deferred common stock units of Alliant Energy Corp in direct form.

What is the price and type of security in Cortinas Alliant Energy Form 4 filing?

The filing shows Deferred Common Stock Units acquired at a price of $65.02 per unit, categorized as a derivative security tied to Alliant Energy common stock.

When will Ignacio A. Cortinas Alliant Energy deferred stock units be settled?

The footnotes state that the units are to be settled in shares of common stock upon the reporting persons termination of services as a director of Alliant Energy.

Do Cortinas reported Alliant Energy deferred units include dividend adjustments?

Yes. The disclosure notes that the total includes adjustments for accrued dividends, reflecting a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.

Is Cortinas ownership in this Alliant Energy Form 4 direct or indirect?

The Form 4 lists the ownership form for these deferred common stock units as Direct (D), with no separate indirect ownership entity disclosed.