Alliant Energy Corporation
US ˙ NasdaqGS ˙ US0188021085

SecurityLNT / Alliant Energy Corporation
InstitutionArgent Trust Co
Latest Disclosed Ownership5,944 shares
Latest Disclosed Value $ 426,542
Argent Trust Co reports 3.54% decrease in ownership of LNT / Alliant Energy Corporation

On May 13, 2026 - Argent Trust Co filed a 13F-HR form disclosing ownership of 5,944 shares of Alliant Energy Corporation (US:LNT) valued at $426,541 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 6,162 shares of Alliant Energy Corporation. This represents a change in shares of -3.54% during the quarter. The current value of the position is $420,776 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F ALLIANT ENERGY COMMON STOCK 018802108 5,944 -218 -3.54 427 6.50 0.0145
2026-02-10 2025-12-31 13F ALLIANT ENERGY COMMON STOCK 018802108 6,162 -399 -6.08 401 -9.50 0.0137
2025-11-12 2025-09-30 13F ALLIANT ENERGY COMMON STOCK 018802108 6,561 -453 -6.46 442 4.25 0.0157
2025-08-12 2025-06-30 13F ALLIANT ENERGY COMMON STOCK 018802108 7,014 -369 -5.00 424 -10.74 0.0160
2025-05-09 2025-03-31 13F ALLIANT ENERGY COMMON STOCK 018802108 7,383 -287 -3.74 475 4.86 0.0195
2025-02-13 2024-12-31 13F ALLIANT ENERGY COMMON STOCK 018802108 7,670 0 0.00 454 -2.58 0.0185
2024-11-13 2024-09-30 13F ALLIANT ENERGY COMMON STOCK 018802108 7,670 -1,008 -11.62 465 5.44 0.0193
2024-08-12 2024-06-30 13F ALLIANT ENERGY COMMON STOCK 018802108 8,678 339 4.07 442 5.00 0.0194
2024-05-10 2024-03-31 13F ALLIANT ENERGY COMMON STOCK 018802108 8,339 1,639 24.46 420 22.45 0.0189
2024-02-09 2023-12-31 13F ALLIANT ENERGY COMMON STOCK 018802108 6,700 0 0.00 344 5.86 0.0171
2023-11-08 2023-09-30 13F ALLIANT ENERGY COMMON STOCK 018802108 6,700 0 0.00 325 -7.69 0.0178
2023-08-11 2023-06-30 13F ALLIANT ENERGY COMMON STOCK 018802108 6,700 57 0.86 352 -0.85 0.0190
2023-05-12 2023-03-31 13F ALLIANT ENERGY COMMON STOCK 018802108 6,643 -31 -0.46 355 -3.80 0.0225
2023-02-10 2022-12-31 13F ALLIANT ENERGY COMMON STOCK 018802108 6,674 0 0.00 368 3.95 0.0244
2022-11-10 2022-09-30 13F ALLIANT ENERGY COMMON STOCK 018802108 6,674 0 0.00 354 -9.46 0.0256
2022-08-11 2022-06-30 13F ALLIANT ENERGY COMMON STOCK 018802108 6,674 0 0.00 391 -6.24 0.0268
2022-05-11 2022-03-31 13F ALLIANT ENERGY COMMON STOCK 018802108 6,674 0 0.00 417 1.71 0.0254
2022-02-09 2021-12-31 13F ALLIANT ENERGY COMMON STOCK 018802108 6,674 -498 -6.94 410 1.99 0.0240
2021-11-09 2021-09-30 13F ALLIANT ENERGY COMMON STOCK 018802108 7,172 0 0.00 402 0.50 0.0258
2021-08-09 2021-06-30 13F ALLIANT ENERGY COMMON STOCK 018802108 7,172 313 4.56 400 7.53 0.0263
2021-05-12 2021-03-31 13F ALLIANT ENERGY COMMON STOCK 018802108 6,859 -840 -10.91 372 -6.06 0.0261
2021-02-11 2020-12-31 13F ALLIANT ENERGY COMMON STOCK 018802108 7,699 -60 -0.77 396 -1.25 0.0306
2020-11-13 2020-09-30 13F ALLIANT ENERGY COMMON STOCK 018802108 7,759 154 2.02 401 10.16 0.0353
2020-08-04 2020-06-30 13F ALLIANT ENERGY COMMON STOCK 018802108 7,605 -300 -3.80 364 -4.46 0.0341
2020-05-11 2020-03-31 13F ALLIANT ENERGY COMMON STOCK 018802108 7,905 1,940 32.52 381 16.51 0.0428
2020-02-11 2019-12-31 13F ALLIANT ENERGY COMMON STOCK 018802108 5,965 1,837 44.50 327 47.30 0.0291
2019-11-12 2019-09-30 13F ALLIANT ENERGY COMMON STOCK 018802108 4,128 4,128 222 0.0214
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.