Alliant Energy LNT Insider Ownership

NASDAQ LNT

$66.85 -1.47 (-2.15%)

At close: Oct 19, 2026 · 4:00 PM EDT

Insider Holdings by Owner

815.08K Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

0.268%

▲+0.0004% pp QoQ

Shares Held by Insiders

694.39K

filed for Sep 2026

▲+0.15% QoQ

Shares Outstanding

259.28Mn

259,284,699 shares

Direct Holdings

694.39K

Indirect: 0

Net Shares Traded (QoQ)

+1.02K

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past 12 months, Alliant Energy insiders sold $7 of stock on the open market and made no open-market purchases.

Robert J. Durian (EVP and CFO) was the top open-market seller of Alliant Energy over the past 12 months, with $7 sold and the latest sale on August 10, 2026.
Away from the open market, LNT insiders received 174.66K shares in stock awards and gave up 71.36K shares to cover taxes or exercise prices over the last 12 months.
According to Business Quant data, insiders at Alliant Energy reported 694.39K shares in total in their latest Form 4 filings, up 0.15% from 693.37K shares at the end of Q2 2026 and up 11.98% from 620.09K shares at the end of Q3 2025.
LNT's insiders hold all 694.39K shares directly, in their own names, with no indirect holdings.
Per Business Quant, 11 insiders of LNT hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
Alliant Energy's three largest insider shareholders, based on their latest Form 4 filings, are John O. Larsen (Director, 289.94K shares), Robert J. Durian (EVP and CFO, 158.15K shares) and Lisa M. Barton (President and CEO, 107.45K shares).
The largest insider, John O. Larsen, holds 41.75% of LNT's insider total.
Institutional holders reported 97.55% of Alliant Energy's outstanding shares for Q2 2026; insiders' latest Form 4 filings put their stake at about 0.27%, and other investors, including the public, hold the remaining 2.18%.
Over the trailing 12 months, 16 insiders reported transactions in LNT stock across 39 Form 4 filings.
Insider figures for LNT include Form 4 filings through August 12, 2026.

Form 4 Holdings

Insiders Holding LNT

Insiders 14

Shares held 815.08K

Of outstanding 0.314%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	John O Larsen	Executive Chairman	289,939	289,939	35.6%	24 Feb, 2025
2	Robert J Durian	Evp And Cfo	158,146	158,146	19.4%	12 Aug, 2026
3	Lisa M Barton	President And Ceo	107,452	107,452	13.2%	23 Feb, 2026
4	James H Gallegos	Evp, Gen Cnsl And Corp Sec	57,448	57,448	7.0%	01 Mar, 2022
5	Raja Sundararajan	Executive Vice President	49,408	49,408	6.1%	23 Feb, 2026
6	Leon David A De	Senior Vice President	47,708	47,708	5.9%	23 Feb, 2026
7	Terry L Kouba	Senior Vice President	42,849	42,849	5.3%	20 Feb, 2024
8	Antonio P Smyth	Executive Vice President	20,678	20,678	2.5%	16 Apr, 2026
9	Benjamin M Bilitz	Cao And Controller	19,420	19,420	2.4%	24 Feb, 2025
10	Mayuri Farlinger	Vice President	10,432	10,432	1.3%	23 Feb, 2026
11	Michael Luhrs	Senior Vice President	4,037	4,037	0.5%	27 Feb, 2023
12	Dylan Syse	Cao And Controller	4,020	4,020	0.5%	23 Feb, 2026
13	Rebecca C. Valcq	Vice President	2,335	2,335	0.3%	19 Mar, 2026
14	Nancy Joy Falotico	Director	1,210	1,210	0.1%	13 Jun, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

1,860 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
09 Oct, 2026	Stephanie Cox	Director	Acquired A	607	$65.85	$40.00K	18,651	Direct
09 Oct, 2026	Roger K Newport	Director	Acquired A	878	$65.85	$57.81K	33,544	Direct
09 Oct, 2026	Christie Raymond	Director	Acquired A	1,158	$65.85	$76.25K	10,880	Direct
09 Oct, 2026	Michael Dennis Garcia	Director	Acquired A	926	$65.85	$61.00K	27,924	Direct
09 Oct, 2026	Nancy Joy Falotico	Director	Acquired A	864	$65.85	$56.88K	21,543	Direct
09 Oct, 2026	Patrick E Allen	Director	Acquired A	569	$65.85	$37.50K	47,271	Direct
09 Oct, 2026	Ignacio A Cortina	Director	Acquired A	823	$65.85	$54.17K	11,848	Direct
09 Oct, 2026	Manu Asthana	Director	Acquired A	1,158	$65.85	$76.25K	2,164	Direct
10 Aug, 2026	Robert J Durian	Evp And Cfo	Disposed S	0	$68.60	$7	158,146	Direct
10 Jul, 2026	Nancy Joy Falotico	Director	Acquired A	744	$76.40	$56.87K	20,523	Direct
10 Jul, 2026	Patrick E Allen	Director	Acquired A	491	$76.40	$37.50K	46,349	Direct
10 Jul, 2026	Ignacio A Cortina	Director	Acquired A	638	$76.40	$48.75K	10,943	Direct
10 Jul, 2026	Roger K Newport	Director	Acquired A	736	$76.40	$56.25K	32,420	Direct
10 Jul, 2026	Stephanie Cox	Director	Acquired A	524	$76.40	$40.00K	17,907	Direct
10 Jul, 2026	Michael Dennis Garcia	Director	Acquired A	838	$76.40	$64.00K	26,794	Direct
10 Jul, 2026	Manu Asthana	Director	Acquired A	998	$76.40	$76.25K	998	Direct
10 Jul, 2026	Christie Raymond	Director	Acquired A	998	$76.40	$76.25K	9,648	Direct
15 Apr, 2026	Antonio P Smyth	Executive Vice President	Disposed F	1,259	$72.18	$90.87K	20,678	Direct
10 Apr, 2026	Michael Dennis Garcia	Director	Acquired A	876	$73.10	$64.00K	25,762	Direct
10 Apr, 2026	Patrick E Allen	Director	Acquired A	513	$73.10	$37.50K	45,515	Direct

Showing 1 to 20 of 1,860 transactions