$LNT

$69.50 -$0.16 (0.23%) Close

$LNT Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 259.3M shares outstanding

Who owns LNT?

By type of holder

Institutions 97.7% Insiders 0.3% Everyone else 2.1%

Concentration Top 10 holders own 48.2%

BlackRock, Inc. 9.6% · State Street Corp 6.8%

Institutional ownership

97.7%

+5.5 pts vs last qtr

Institutional holders

878

+19 vs last qtr

Net shares bought

+14.2M

by institutions in Q2 2026

New / sold out

95 / 76

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Jupiter Topco LLC NEW +11.0M
FMR LLC +2.2M

Biggest sellers in Q2 2026

Janus Henderson Group PLC SOLD OUT −11.3M
Victory Capital Management Inc −796.5K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Alliant Energy Corp in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2012–FY2025

+16.4%

+1.70% a year

Each share's claim on the business

−14.1%

shrank without buying or selling a share

Diluted shares, split-adjusted

How patient are the owners?

Institutional shares by how long they've been held

5+ years78% 3–5 years3% 1–3 years11% Under 1 year8%

Quarterly turnover

10.9%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting LNT on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	25.0M	9.64%	+487.2K (+2.0%)	≤2021	0.0%
Shares held by quarter Peak holding25.0M (Q2'26) Change over 8 quarters+1.9M Share of the company9.640% BlackRock, Inc.'s full portfolio →
SS State Street Corp	17.6M	6.78%	+561.3K (+3.3%)	≤2021	0.0%
Shares held by quarter Peak holding17.6M (Q2'26) Change over 8 quarters+1.3M Share of the company6.780% State Street Corp's full portfolio →

BlackRock, Inc.

25.0M

% of company

9.64%

Change vs last qtr

+487.2K (+2.0%)

Held since

≤2021

State Street Corp

17.6M

% of company

6.78%

Change vs last qtr

+561.3K (+3.3%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Alliant Energy Corp, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting LNT on Form N-PORT; together they hold 51.2% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$625M	8.2M	3.16%	0.03%	June 30, 2026
JH Janus Henderson Enterprise Fund Janus Investment Fund	$528M	6.9M	2.67%	2.36%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$625M

% of company

3.16%

% of the fund

0.03%

As of

June 30, 2026

Janus Henderson Enterprise Fund

Janus Investment Fund

Position value

$528M

% of company

2.67%

% of the fund

2.36%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Alliant Energy Corp and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
LJ Larsen John O Insider	301.5K	0.12%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.120% Larsen John O's insider activity →
DR Durian Robert J Insider	163.8K	0.06%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.060% Durian Robert J's insider activity →

Larsen John O

Insider

301.5K

% of company

0.12%

Change vs last qtr

—

Held since

—

Durian Robert J

Insider

163.8K

% of company

0.06%

Change vs last qtr

—

Held since

—

9 more holders behind a free account

See every insider and 5%+ holder of Alliant Energy Corp.

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