Alliant Energy insider activity
What the executives and directors of Alliant Energy actually did with their own shares, decoded from their SEC Form 4 filings. Each figure says the stretch of time it covers.
−$7
net open-market flow, 12 m
0 open-market buys, 12 m
0%
of sale value on 10b5-1 plans, 12 m
944 days since an insider bought, whole record
The tape: three years of insider trades
Open-market buy
Discretionary sale
Planned sale (10b5-1)
Reported-price path
Routine
Every marker sits at the price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the grey strip is the routine flow (grants, vestings, tax withholding and gifts) that a headline gets wrong by counting it as selling.
The 28 routine events on the chart, as a list
| Date | Insider | Shares |
|---|---|---|
| Apr 15, 2026 | Smyth Antonio P | 1,259 |
| Feb 19, 2026 | DURIAN ROBERT J | 50K |
| Feb 19, 2026 | Barton Lisa M | 106K |
| Feb 19, 2026 | de Leon David A | 16K |
| Feb 19, 2026 | Sundararajan Raja | 39K |
| Feb 19, 2026 | Smyth Antonio P | 25K |
| Feb 19, 2026 | Farlinger Mayuri | 5,303 |
| Feb 19, 2026 | Syse Dylan | 2,319 |
| Feb 19, 2026 | Valcq Rebecca C. | 1,442 |
| Apr 15, 2025 | Smyth Antonio P | 9,727 |
| Feb 20, 2025 | LARSEN JOHN O | 57K |
| Feb 20, 2025 | DURIAN ROBERT J | 23K |
| Feb 20, 2025 | Barton Lisa M | 21K |
| Feb 20, 2025 | Bilitz Benjamin M | 3,866 |
| Feb 20, 2025 | de Leon David A | 8,348 |
| Feb 20, 2025 | Sundararajan Raja | 5,802 |
| Feb 20, 2025 | Farlinger Mayuri | 2,738 |
| Nov 20, 2024 | Bilitz Benjamin M | 850 |
| May 7, 2024 | de Leon David A | 465 |
| May 7, 2024 | Farlinger Mayuri | 236 |
| Feb 15, 2024 | LARSEN JOHN O | 151K |
| Feb 15, 2024 | DURIAN ROBERT J | 44K |
| Feb 15, 2024 | Barton Lisa M | 23K |
| Feb 15, 2024 | Bilitz Benjamin M | 7,000 |
| Feb 15, 2024 | Kouba Terry L | 13K |
| Feb 15, 2024 | de Leon David A | 14K |
| Feb 15, 2024 | Sundararajan Raja | 5,269 |
| Dec 7, 2023 | Kouba Terry L | 4,000 |
Where the shares went, last 12 months
Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price.
The chart, in numbers
| Flow | Shares |
|---|---|
| Granted | 175K |
| Withheld for tax | 71K |
| Kept | 103K |
Skin in the game
Directly held shares as reported after each trade, indexed to 100 at the start of the window, up to five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades.
The chart, in numbers
| Insider | Start of the window | Latest reported | Indexed, start = 100 |
|---|---|---|---|
| LARSEN JOHN O | 117K | 290K | 247.6 |
| DURIAN ROBERT J | 67K | 158K | 237.2 |
| de Leon David A | 19K | 48K | 246.1 |
Who holds what
| Insider | Role | Shares held | Buys 12 m | Sales 12 m | 12 m | Last trade |
|---|---|---|---|---|---|---|
| LARSEN JOHN O Last trade Feb 25, 2016 | Director | 314K | – | – | Feb 25, 2016 | |
| DURIAN ROBERT J EVP and CFO Last trade Aug 10, 2026 | CFO | 158K | – | $7 | net selling over the year: 0 months buying, 1 month selling | Aug 10, 2026 |
| Barton Lisa M President and CEO Last trade Feb 20, 2024 | CEO | 107K | – | – | Feb 20, 2024 | |
| de Leon David A Senior Vice President Last trade Sep 3, 2019 | Officer | 51K | – | – | Sep 3, 2019 | |
| Kouba Terry L Senior Vice President | Officer | 45K | – | – | – | |
| Sundararajan Raja Executive Vice President Last trade Feb 20, 2024 | Officer | 36K | – | – | Feb 20, 2024 | |
| Smyth Antonio P Executive Vice President | Officer | 21K | – | – | – | |
| Bilitz Benjamin M CAO and Controller | Officer | 20K | – | – | – | |
| Farlinger Mayuri Vice President | Officer | 11K | – | – | – | |
| Syse Dylan CAO and Controller | Officer | 3,776 | – | – | – | |
| Valcq Rebecca C. Vice President | Officer | 2,335 | – | – | – |
Open-market trade log
the 60 most recent of 140| Date | Insider | Type | Shares | Price | Value | Since trade | Filed |
|---|---|---|---|---|---|---|---|
| Aug 10, 2026 | DURIAN ROBERT J (CFO) 0 shares $68.60 +0.0% since trade filed Aug 12, 2026 | Discretionary sale | 0 | $68.60 | $7 | +0.0% | Aug 12, 2026 |
| Feb 20, 2024 | Barton Lisa M (CEO) 1,100 shares $48.56 +41.3% since trade filed Feb 20, 2024 | Open-market buy | 1,100 | $48.56 | $53K | +41.3% | Feb 20, 2024 |
| Feb 20, 2024 | Sundararajan Raja (Officer) 500 shares $48.26 +42.2% since trade filed Feb 20, 2024 | Open-market buy | 500 | $48.26 | $24K | +42.2% | Feb 20, 2024 |
| Jun 9, 2022 | Falotico Nancy Joy (Director) 1,200 shares $61.00 +12.5% since trade filed Jun 13, 2022 | Open-market buy | 1,200 | $61.00 | $73K | +12.5% | Jun 13, 2022 |
| Feb 28, 2022 | GALLEGOS JAMES H (Officer) 10K shares $58.04 +18.2% since trade filed Mar 1, 2022 | Discretionary sale | 10K | $58.04 | $580K | +18.2% | Mar 1, 2022 |
| Sep 3, 2019 | de Leon David A (Officer) 941 shares $53.15 filed Sep 5, 2019 | Open-market buy | 941 | $53.15 | $50K | – | Sep 5, 2019 |
| Aug 29, 2019 | GALLEGOS JAMES H (Officer) 5,000 shares $52.29 filed Aug 30, 2019 | Discretionary sale | 5,000 | $52.29 | $261K | – | Aug 30, 2019 |
| Jun 14, 2019 | GALLEGOS JAMES H (Officer) 5,000 shares $50.00 filed Jun 17, 2019 | Discretionary sale | 5,000 | $50.00 | $250K | – | Jun 17, 2019 |
| Jun 3, 2019 | KAMPLING PATRICIA L (CEO) 10K shares $47.55 filed Jun 4, 2019 | Discretionary sale | 10K | $47.55 | $476K | – | Jun 4, 2019 |
| May 3, 2019 | GALLEGOS JAMES H (Officer) 5,000 shares $47.50 filed May 6, 2019 | Discretionary sale | 5,000 | $47.50 | $238K | – | May 6, 2019 |
| May 1, 2019 | KAMPLING PATRICIA L (CEO) 10K shares $46.98 filed May 3, 2019 | Discretionary sale | 10K | $46.98 | $470K | – | May 3, 2019 |
| Sep 13, 2018 | Dunie Deborah B. (Director) 1,250 shares $43.80 filed Sep 17, 2018 | Open-market buy | 1,250 | $43.80 | $55K | – | Sep 17, 2018 |
| Mar 15, 2018 | GALLEGOS JAMES H (Officer) 5,000 shares $39.80 filed Mar 16, 2018 | Discretionary sale | 5,000 | $39.80 | $199K | – | Mar 16, 2018 |
| Sep 7, 2017 | RESCHKE WAYNE A (Officer) 2,000 shares $42.83 filed Sep 11, 2017 | Discretionary sale | 2,000 | $42.83 | $86K | – | Sep 11, 2017 |
| May 23, 2017 | GALLEGOS JAMES H (Officer) 5,000 shares $41.25 filed May 25, 2017 | Discretionary sale | 5,000 | $41.25 | $206K | – | May 25, 2017 |
| May 19, 2017 | Dunie Deborah B. (Director) 3,700 shares $39.61 filed May 22, 2017 | Open-market buy | 3,700 | $39.61 | $147K | – | May 22, 2017 |
| Nov 7, 2016 | Dunie Deborah B. (Director) 1,350 shares $37.24 filed Nov 7, 2016 | Open-market buy | 1,350 | $37.24 | $50K | – | Nov 7, 2016 |
| Aug 9, 2016 | KAMPLING PATRICIA L (CEO) 0 shares $39.30 filed Aug 10, 2016 | Discretionary sale | 0 | $39.30 | $13 | – | Aug 10, 2016 |
| Jul 11, 2016 | GALLEGOS JAMES H (Officer) 5,000 shares $40.29 filed Jul 12, 2016 | Discretionary sale | 5,000 | $40.29 | $201K | – | Jul 12, 2016 |
| May 10, 2016 | Dunie Deborah B. (Director) 1,000 shares $73.11 filed May 10, 2016 | Open-market buy | 1,000 | $73.11 | $73K | – | May 10, 2016 |
| Mar 3, 2016 | HANSON THOMAS L (CFO) 7,500 shares $68.15 filed Mar 4, 2016 | Discretionary sale | 7,500 | $68.15 | $511K | – | Mar 4, 2016 |
| Feb 25, 2016 | LARSEN JOHN O (Officer) 3,000 shares $69.94 filed Feb 29, 2016 | Discretionary sale | 3,000 | $69.94 | $210K | – | Feb 29, 2016 |
| Nov 10, 2015 | Whiting Susan D (Director) 2,700 shares $57.50 filed Nov 12, 2015 | Open-market buy | 2,700 | $57.50 | $155K | – | Nov 12, 2015 |
| Sep 1, 2015 | Dunie Deborah B. (Director) 1,000 shares $55.63 filed Sep 4, 2015 | Open-market buy | 1,000 | $55.63 | $56K | – | Sep 4, 2015 |
| Nov 10, 2014 | LARSEN JOHN O (Officer) 3,000 shares $62.99 filed Nov 12, 2014 | Discretionary sale | 3,000 | $62.99 | $189K | – | Nov 12, 2014 |
| Aug 27, 2014 | LARSEN JOHN O (Officer) 3,000 shares $57.59 filed Aug 28, 2014 | Discretionary sale | 3,000 | $57.59 | $173K | – | Aug 28, 2014 |
| Mar 13, 2014 | ALLER THOMAS L (Officer) 1,876 shares $54.90 filed Mar 17, 2014 | Discretionary sale | 1,876 | $54.90 | $103K | – | Mar 17, 2014 |
| Apr 30, 2013 | ALLER THOMAS L (Officer) 2,887 shares $53.00 filed May 1, 2013 | Discretionary sale | 2,887 | $53.00 | $153K | – | May 1, 2013 |
| Apr 30, 2013 | ALLER THOMAS L (Officer) 19K shares $53.00 filed May 1, 2013 | Discretionary sale | 19K | $53.00 | $995K | – | May 1, 2013 |
| Oct 15, 2012 | ALLEN PATRICK E (Director) 459 shares $44.50 filed Oct 17, 2012 | Open-market buy | 459 | $44.50 | $20K | – | Oct 17, 2012 |
| Aug 16, 2012 | LARSEN JOHN O (Officer) 1,500 shares $46.12 filed Aug 21, 2012 | Discretionary sale | 1,500 | $46.12 | $69K | – | Aug 21, 2012 |
| Jul 16, 2012 | ALLEN PATRICK E (Director) 439 shares $46.59 filed Jul 18, 2012 | Open-market buy | 439 | $46.59 | $20K | – | Jul 18, 2012 |
| Apr 16, 2012 | ALLEN PATRICK E (Director) 474 shares $43.12 filed Apr 18, 2012 | Open-market buy | 474 | $43.12 | $20K | – | Apr 18, 2012 |
| Dec 21, 2011 | ALLER THOMAS L (Officer) 15K shares $43.11 filed Dec 21, 2011 | Discretionary sale | 15K | $43.11 | $635K | – | Dec 21, 2011 |
| Dec 7, 2011 | ALLER THOMAS L (Officer) 2,700 shares $43.00 filed Dec 8, 2011 | Discretionary sale | 2,700 | $43.00 | $116K | – | Dec 8, 2011 |
| Aug 9, 2011 | Sanders Carol P (Director) 100 shares $35.13 filed Aug 9, 2011 | Discretionary sale | 100 | $35.13 | $4K | – | Aug 9, 2011 |
| May 12, 2011 | ALLER THOMAS L (Officer) 17K shares $41.03 filed May 13, 2011 | Discretionary sale | 17K | $41.03 | $715K | – | May 13, 2011 |
| May 11, 2011 | DOYLE DUNDEANA K (Officer) 3,996 shares $40.70 filed May 11, 2011 | Discretionary sale | 3,996 | $40.70 | $163K | – | May 11, 2011 |
| May 11, 2011 | SCHMIDT JOEL J (Officer) 3,931 shares $40.75 filed May 11, 2011 | Discretionary sale | 3,931 | $40.75 | $160K | – | May 11, 2011 |
| May 9, 2011 | DOYLE DUNDEANA K (Officer) 599 shares $40.31 filed May 11, 2011 | Discretionary sale | 599 | $40.31 | $24K | – | May 11, 2011 |
| Feb 16, 2011 | HAZEL DARRYL B (Director) 510 shares $39.19 filed Feb 17, 2011 | Open-market buy | 510 | $39.19 | $20K | – | Feb 17, 2011 |
| Feb 16, 2011 | LARSEN JOHN O (Officer) 2,000 shares $38.82 filed Feb 17, 2011 | Discretionary sale | 2,000 | $38.82 | $78K | – | Feb 17, 2011 |
| Nov 4, 2010 | HANSON THOMAS L (Officer) 1,000 shares $37.41 filed Nov 9, 2010 | Discretionary sale | 1,000 | $37.41 | $37K | – | Nov 9, 2010 |
| Nov 2, 2010 | HARVEY WILLIAM D (CEO) 11K shares $36.50 filed Nov 3, 2010 | Discretionary sale | 11K | $36.50 | $394K | – | Nov 3, 2010 |
| Nov 2, 2010 | SCHMIDT JOEL J (Officer) 2,963 shares $37.00 filed Nov 3, 2010 | Discretionary sale | 2,963 | $37.00 | $110K | – | Nov 3, 2010 |
| Nov 1, 2010 | SCHMIDT JOEL J (Officer) 1,000 shares $36.28 filed Nov 3, 2010 | Discretionary sale | 1,000 | $36.28 | $36K | – | Nov 3, 2010 |
| Sep 14, 2010 | ALLER THOMAS L (Officer) 1,600 shares $36.55 filed Sep 15, 2010 | Discretionary sale | 1,600 | $36.55 | $58K | – | Sep 15, 2010 |
| Sep 14, 2010 | ALLER THOMAS L (Officer) 11K shares $36.54 filed Sep 15, 2010 | Discretionary sale | 11K | $36.54 | $388K | – | Sep 15, 2010 |
| Aug 16, 2010 | LARSEN JOHN O (Officer) 500 shares $35.47 filed Aug 18, 2010 | Discretionary sale | 500 | $35.47 | $18K | – | Aug 18, 2010 |
| Aug 9, 2010 | HARVEY WILLIAM D (CEO) 11K shares $35.73 filed Aug 11, 2010 | Discretionary sale | 11K | $35.73 | $393K | – | Aug 11, 2010 |
| Aug 9, 2010 | KAMPLING PATRICIA L (CFO) 5,000 shares $35.20 filed Aug 10, 2010 | Discretionary sale | 5,000 | $35.20 | $176K | – | Aug 10, 2010 |
| Aug 18, 2008 | KAMPLING PATRICIA L (Officer) 900 shares $33.84 filed Aug 19, 2008 | Discretionary sale | 900 | $33.84 | $30K | – | Aug 19, 2008 |
| Jun 16, 2008 | MCALLISTER SINGLETON B (Director) 828 shares $36.74 filed Jun 18, 2008 | Open-market buy | 828 | $36.74 | $30K | – | Jun 18, 2008 |
| Nov 19, 2007 | DOYLE DUNDEANA K (Officer) 282 shares $0.00 filed Nov 20, 2007 | Open-market buy | 282 | $0.00 | $0 | – | Nov 20, 2007 |
| Nov 19, 2007 | KAMPLING PATRICIA L (Officer) 41 shares $0.00 filed Nov 20, 2007 | Open-market buy | 41 | $0.00 | $0 | – | Nov 20, 2007 |
| Nov 19, 2007 | MOORE PEGGY HOWARD (Officer) 149 shares $0.00 filed Nov 20, 2007 | Open-market buy | 149 | $0.00 | $0 | – | Nov 20, 2007 |
| Nov 14, 2007 | ALLER THOMAS L (Officer) 5,063 shares $40.92 filed Nov 15, 2007 | Discretionary sale | 5,063 | $40.92 | $207K | – | Nov 15, 2007 |
| Nov 9, 2007 | ALLER THOMAS L (Officer) 5,000 shares $41.00 filed Nov 13, 2007 | Discretionary sale | 5,000 | $41.00 | $205K | – | Nov 13, 2007 |
| Aug 16, 2007 | DOYLE DUNDEANA K (Officer) 214 shares $0.00 filed Aug 20, 2007 | Open-market buy | 214 | $0.00 | $0 | – | Aug 20, 2007 |
| Aug 16, 2007 | KAMPLING PATRICIA L (Officer) 38 shares $0.00 filed Aug 20, 2007 | Open-market buy | 38 | $0.00 | $0 | – | Aug 20, 2007 |
“Since trade” compares with the latest insider-implied price, not a market quote: these pages are built from filings alone. A role here is the one on that day's Form 4, so somebody promoted since appears under both titles.
Filing hygiene
113 Forms 4, 3 years
0 filed late
1 amendments
2.1 avg. days to file
How to read this
A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.
Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.