SEC filingsOct 12, 2026 to Oct 19, 2026: insiders reported 840 purchases and sales across 212 companies.840 insider purchases and sales in 7 daysSee the filings →
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Company profile

LNT

Alliant Energy Corporation
NASDAQUtilities

Latest close: 70.20 USD · Aug 5, 2026 · 1 year · split-adjusted

On the price, the facts of the public record●Results filed
With an account, also○dividends▲splits◌next earningswith an account

End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.

Latest on record

The most recent facts, as filed.

Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.

  1. Aug 21, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
  2. Aug 10, 2026Reported sale · Form 4ROBERT J DURIAN, EVP and CFO · $6.7Open the filing ↗
  3. Jul 31, 2026Quarterly report · 10-QFiled by the company itself.Open the filing ↗

In numbers

What this profile holds, counted.

Closes · 1 year199
SEC filings on record9806 flagged findings
Reported transactions (Form 4)9since Aug 10, 2026
Corporate events (8-K)30since Mar 3, 2023

What the record says

Description, identity and filings, each with its source.

Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.

SEC topics

Regulatory history

Topics detected in its SEC reports, with the original excerpt.

Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.

  • 2026-05-01share offering or dilution eventrecentOpen filing ↗
    “…Offering Programs - In March 2026, Alliant Energy fully utilized the remaining capacity under its $ 1.3 billion 2025…”
    +1 more passage from the same document
    • “…capacity under its $ 1.3 billion 2025 at-the-market offering program and Alliant Energy filed a new prospectus supplement and…”
  • 2026-03-19capital return (buybacks/dividends)recentOpen filing ↗
    “…a forward seller, sell a number of Shares equal to the number of Shares that underlie the Forward Confirmation to hedge the Forward…”
  • 2026-03-19capital return (buybacks/dividends)recentOpen filing ↗
    “…per share, having an aggregate offering price of up to $1,000,000,000. Use of Proceeds We intend to use the net proceeds that we…”
    +1 more passage from the same document
    • “…proceedings or any such petition, we would not receive the forward sale price per share in respect of those shares of our common…”

Original excerpts from SEC filings, untranslated. Not advice and not a prediction.

SEC record

SEC dossier

What this company has filed with the SEC, in plain language.

The 25 most recent filings (of 980)

Everything filed

Every SEC filing, newest first, with what it is. Below, each type with its own explanation.

  • Insider transaction · 8 Form 4 filings newshow all 8hide
  • Aug 21, 268-K ↗Current report · Other events
  • Aug 12, 26Form 4 ↗Insider transaction
  • Jul 31, 2610-Q ↗Quarterly report
  • Jul 31, 268-K ↗Current report · Results
  • Insider transaction · 8 Form 4 filingsshow all 8hide
  • May 21, 268-K ↗Current report · Shareholder vote results
  • May 1, 2610-Q ↗Quarterly report
  • May 1, 268-K ↗Current report · Results
  • Apr 29, 26SCHEDULE 13G ↗Passive stake · Vanguard Capital Management · 7.5% · event on Mar 31, 26
  • Apr 28, 26SCHEDULE 13G ↗Passive stake · Vanguard Portfolio Management · 5.7% · event on Mar 31, 26

980 filings on record, the oldest from Nov 20, 13.

Listing the 25 most recent filings of the 980 on record.

8-Ks, explained

Stress2Structure46Governance30
  • Mar 19, 26StructureEntered a material agreement+1 more in the same filing8-K 1.01 ↗
  • Mar 4, 26StructureEntered a material agreement+2 more in the same filing8-K 1.01 ↗
  • Jan 8, 26GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Dec 16, 25GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • May 15, 25StructureEntered a material agreement+4 more in the same filing8-K 1.01 ↗
  • May 9, 25StructureEntered a material agreement+1 more in the same filing8-K 1.01 ↗
  • Mar 10, 25GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Mar 3, 25StructureEntered a material agreement+2 more in the same filing8-K 1.01 ↗
  • Feb 11, 25GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Dec 18, 24StructureTook on a new financial obligation+1 more in the same filing8-K 2.03 ↗
  • Jul 15, 24GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Jun 24, 24StressWrite-down of assets8-K 2.06 ↗

10 older filings not shown · The record reaches back to Feb 11, 14.

Notable in the record

Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.

  • Dec 18, 18StressListing notice (8-K 3.01)+3 more in the same filing8-K 3.01 ↗

The full record holds 2 stress filings.

Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.

Ownership and control

Schedule 13G: short-form filing

The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.

Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.

SEC record

Insider transactions

Buys and sells reported by officers, directors and major shareholders on SEC Form 4.

Buys and sells

  • Aug 10, 26Sell$7ROBERT J DURIANEVP and CFO↗

The full record holds 1 transactions and goes back to Aug 10, 26.

Its sector and its market

Alliant Energy Corporation among Utilities companies

The profile shows what is on record. Context and Radar place the company among those of its sector and region.

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The research continues

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From Alliant Energy Corporation, the path continues in the other areas. Each one is shown with its own example, named in its step.

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Coverage

What sits behind this page.

Where each figure comes from and how far it reaches.

Prices
End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
Series quality
199 clean closes in the period.
SEC records
980 documents on file, from Nov 20, 2013 to Oct 14, 2026.
Company description
No description available.
This page
Generated on Oct 19, 2026; refreshed through the day.

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Are the prices real time?

No. It is one close per session, from the provider and with the date shown on the profile; it does not update during the trading day.

Which SEC documents appear here?

Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.

Why does a European company show no SEC records?

It depends on the company: some European issuers file a 20-F or 6-K with the SEC and others don't. The profile shows whatever is on record; when there is nothing, it says so rather than guessing why. Europe does not yet have a common filing archive like EDGAR in the United States. The EU will open its own, ESAP, in July 2027 (managers' transactions arrive in January 2028), and we plan to add it once it is available.

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