Alliant Energy (LNT) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.
Alliant Energy Corporation (LNT) insider buying and selling: no purchases, 1 sale
17 Form 4 Table I transactions filed with the SEC by Alliant Energy Corporation insiders between 2026-02-23 and 2026-08-12 (15-month history): 0 open-market purchases and 1 sale, plus 16 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $7 by Durian Robert J on 2026-08-10.
Alliant Energy insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Alliant Energy insiders filed 1 sale worth $7 on the open market, and no purchases.
The largest trade of the period was a sale of $7 on Aug 10, 2026, by Durian Robert J (EVP and CFO). Form 4 on sec.gov (0001512789-26-000003).
The only sale does not carry the 10b5-1 plan flag on the Form 4 (sales scheduled months ahead).
The last three months show 1 sale, against 0 in the three before. The latest sale from Aug 10, 2026.
Against its sector (Utilities, 31 companies with an insider page on this site), over the same dates the median is 5 sales and 0 purchases on the open market. Alliant Energy has more sales than 5 of the other 30, ranks 26 of 31 by net dollars sold, and 11 of the 31 have at least one purchase.
The 17 most important trades
With no open-market purchases, the table starts with LNT's sales, largest first. The full history is in the tool above, already searched.
See all 17 LNT trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-08-10 | 2026-08-12 | Durian Robert J | EVP and CFO | $7 | S — Open-market saleForm 4 footnoteF1 Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. | SEC |
| 2026-02-19 | 2026-02-23 | Barton Lisa M | President and CEO | $2.0M | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-19 | 2026-02-23 | Durian Robert J | EVP and CFO | $1.2M | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-19 | 2026-02-23 | Sundararajan Raja | Executive Vice President | $793k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-19 | 2026-02-23 | Smyth Antonio P | Executive Vice President | $436k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-19 | 2026-02-23 | De Leon David A | Senior Vice President | $365k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-04-15 | 2026-04-16 | Smyth Antonio P | Executive Vice President | $91k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of restricted stock units and does not represent a sale by the Reporting Person. F2 Includes shares acquired pursuant to transactions exempt from Section 16 under Rule 16a-11. | SEC |
| 2026-02-19 | 2026-02-23 | Farlinger Mayuri | Vice President | $83k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-19 | 2026-02-23 | Syse Dylan | CAO and Controller | $35k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-19 | 2026-02-23 | Durian Robert J | EVP and CFO | A — Grant or award2 Form 4 footnotesF1 Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. F2 Represents restricted stock units (RSUs) which are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2028. | SEC | |
| 2026-02-19 | 2026-02-23 | Barton Lisa M | President and CEO | A — Grant or awardForm 4 footnoteF1 Represents restricted stock units (RSUs) which are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2028. | SEC | |
| 2026-02-19 | 2026-02-23 | De Leon David A | Senior Vice President | A — Grant or award2 Form 4 footnotesF1 Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. F2 Represents restricted stock units (RSUs) which are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2028. | SEC | |
| 2026-02-19 | 2026-02-23 | Sundararajan Raja | Executive Vice President | A — Grant or awardForm 4 footnoteF1 Represents restricted stock units (RSUs) which are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2028. | SEC | |
| 2026-02-19 | 2026-02-23 | Smyth Antonio P | Executive Vice President | A — Grant or awardForm 4 footnoteF1 Represents restricted stock units (RSUs) which are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2028. | SEC | |
| 2026-02-19 | 2026-02-23 | Farlinger Mayuri | Vice President | A — Grant or award2 Form 4 footnotesF1 Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. F2 Represents restricted stock units (RSUs) which are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2028. | SEC | |
| 2026-02-19 | 2026-02-23 | Syse Dylan | CAO and Controller | A — Grant or awardForm 4 footnoteF1 Represents restricted stock units (RSUs) which are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2028. | SEC | |
| 2026-02-19 | 2026-02-23 | Valcq Rebecca C. | Vice President | A — Grant or awardForm 4 footnoteF1 Represents restricted stock units (RSUs) which are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2028. | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Feb 23, 2026 and Aug 12, 2026 there is not one open-market purchase of Alliant Energy Corporation: 1 sale worth $7 and zero dollars bought.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Alliant Energy Corporation's is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| A | Grant or award | 8 | $0 |
| F | Tax withholding (shares surrendered for taxes) | 8 | $5.0M |
| S | Open-market sale | 1 | $7 |
| Total | Everything filed in the period | 17 | $5.0M |
8 of the 17 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 8 distinct people or entities have filed Alliant Energy Corporation transactions: none bought on the open market and 1 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Durian Robert J | EVP and CFO | 3 | — | $7 (1) | 2026-08-12 |
| Smyth Antonio P | Executive Vice President | 3 | — | — | 2026-04-16 |
| Barton Lisa M | President and CEO | 2 | — | — | 2026-02-23 |
| De Leon David A | Senior Vice President | 2 | — | — | 2026-02-23 |
| Farlinger Mayuri | Vice President | 2 | — | — | 2026-02-23 |
| Sundararajan Raja | Executive Vice President | 2 | — | — | 2026-02-23 |
| Syse Dylan | CAO and Controller | 2 | — | — | 2026-02-23 |
| Valcq Rebecca C. | Vice President | 1 | — | — | 2026-02-23 |
The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
Across the 15 months of history there is only 1 open-market trade in Alliant Energy Corporation, so no calendar is published: 15 rows of zeros would fake a pattern where there is no sample to read. It is listed with its date in the tables above.
Alliant Energy Corporation (LNT) analysis page →
Other Utilities companies with insider trades
All 500 are listed in the section index →
Which insiders are buying their own company stock →
How to read this data
None of the 1 sale in the table is flagged as scheduled (10b5-1 plan), the kind signed months ahead and executed automatically. Alliant Energy has no open-market purchase (code P) in the history, the most common case in the S&P 500: insiders are already paid in stock. The latest filing is from Aug 12, 2026, and a Form 4 arrives up to two business days after the trade.
10 of the 17 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.