Alliant Energy Corporation
US ˙ NasdaqGS ˙ US0188021085

SecurityLNT / Alliant Energy Corporation
InstitutionJohnson Financial Group, Inc.
Latest Disclosed Ownership3,827 shares
Latest Disclosed Value $ 274,626
Johnson Financial Group, Inc. reports 13.55% decrease in ownership of LNT / Alliant Energy Corporation

On May 7, 2026 - Johnson Financial Group, Inc. filed a 13F-HR form disclosing ownership of 3,827 shares of Alliant Energy Corporation (US:LNT) valued at $274,626 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 4,427 shares of Alliant Energy Corporation. This represents a change in shares of -13.55% during the quarter. The current value of the position is $278,873 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)
2026-05-07 2026-03-31 13F ALLIANT ENERGY COM 018802108 3,827 -600 -13.55 275 -4.53 0.0099
2026-02-12 2025-12-31 13F ALLIANT ENERGY COM 018802108 4,427 -4,372 -49.69 288 -51.60 0.0108
2025-11-13 2025-09-30 13F ALLIANT ENERGY COM 018802108 8,799 4,651 112.13 593 137.20 0.0223
2025-08-13 2025-06-30 13F ALLIANT ENERGY COM 018802108 4,148 548 15.22 251 8.23 0.0113
2025-05-15 2025-03-31 13F ALLIANT ENERGY COM 018802108 3,600 0 0.00 232 8.45 0.0113
2025-02-14 2024-12-31 13F ALLIANT ENERGY COM 018802108 3,600 -800 -18.18 214 -20.22 0.0101
2024-11-13 2024-09-30 13F ALLIANT ENERGY COM 018802108 4,400 2,800 175.00 267 229.63 0.0122
2024-08-14 2024-06-30 13F ALLIANT ENERGY COM 018802108 1,600 0 0.00 81 1.25 0.0039
2024-05-14 2024-03-31 13F ALLIANT ENERGY COM 018802108 1,600 -1,242 -43.70 81 -44.83 0.0043
2024-02-09 2023-12-31 13F/A-1 ALLIANT ENERGY COM 018802108 2,842 1,142 67.18 146 76.83 0.0080
2024-02-09 2023-12-31 13F ALLIANT ENERGY COM 018802108 2,842 1,142 146 0.0048
2023-11-14 2023-09-30 13F ALLIANT ENERGY COM 018802108 1,700 -50,836 -96.76 82 -97.03 0.0057
2023-08-14 2023-06-30 13F ALLIANT ENERGY COM 018802108 52,536 -38,555 -42.33 2,757 -43.32 0.1907
2023-05-12 2023-03-31 13F ALLIANT ENERGY COM 018802108 91,091 3,389 3.86 4,864 0.45 0.3465
2023-02-13 2022-12-31 13F ALLIANT ENERGY COM 018802108 87,702 -310 -0.35 4,842 5.42 0.3838
2022-11-14 2022-09-30 13F ALLIANT ENERGY COM 018802108 88,012 -9,316 -9.57 4,593 -19.48 0.4236
2022-08-15 2022-06-30 13F ALLIANT ENERGY COM 018802108 97,328 0 0.00 5,704 -6.20 0.4085
2022-05-16 2022-03-31 13F ALLIANT ENERGY COM 018802108 97,328 46,961 93.24 6,081 96.41 0.4295
2022-02-14 2021-12-31 13F ALLIANT ENERGY COM 018802108 50,367 4,057 8.76 3,096 19.44 0.1964
2021-11-12 2021-09-30 13F ALLIANT ENERGY COM 018802108 46,310 -3,249 -6.56 2,592 -6.19 0.1763
2021-08-13 2021-06-30 13F ALLIANT ENERGY COM 018802108 49,559 436 0.89 2,763 3.83 0.1807
2021-05-14 2021-03-31 13F ALLIANT ENERGY COM 018802108 49,123 1,453 3.05 2,661 8.30 0.1790
2021-02-12 2020-12-31 13F ALLIANT ENERGY COM 018802108 47,670 0 0.00 2,457 -0.20 0.2101
2020-11-12 2020-09-30 13F ALLIANT ENERGY COM 018802108 47,670 0 0.00 2,462 7.98 0.2516
2020-08-11 2020-06-30 13F ALLIANT COM 018802108 47,670 0 0.00 2,280 -0.96 0.2449
2020-05-14 2020-03-31 13F ALLIANT COM 018802108 47,670 0 0.00 2,302 -11.77 0.2752
2020-02-14 2019-12-31 13F ALLIANT COM 018802108 47,670 2,000 4.38 2,609 5.93 0.2356
2019-11-12 2019-09-30 13F ALLIANT COM 018802108 45,670 -527 -1.14 2,463 8.65 0.2259
2019-08-09 2019-06-30 13F ALLIANT COM 018802108 46,197 606 1.33 2,267 5.49 0.2017
2019-05-13 2019-03-31 13F ALLIANT COM 018802108 45,591 658 1.46 2,149 13.22 0.1906
2019-02-11 2018-12-31 13F ALLIANT COM 018802108 44,933 -178 -0.39 1,898 -1.15 0.1954
2018-11-09 2018-09-30 13F ALLIANT COM 018802108 45,111 -4,824 -9.66 1,920 -9.18 0.1959
2018-08-07 2018-06-30 13F ALLIANT COM 018802108 49,935 5,700 12.89 2,114 16.92 0.2320
2018-05-07 2018-03-31 13F ALLIANT COM 018802108 44,235 26 0.06 1,808 -4.03 0.2161
2018-02-12 2017-12-31 13F ALLIANT COM 018802108 44,209 2,980 7.23 1,884 9.92 0.2307
2017-11-09 2017-09-30 13F ALLIANT COM 018802108 41,229 0 0.00 1,714 3.44 0.2254
2017-08-10 2017-06-30 13F ALLIANT COM 018802108 41,229 0 0.00 1,657 1.47 0.2383
2017-05-12 2017-03-31 13F ALLIANT COM 018802108 41,229 817 2.02 1,633 6.59 0.2056
2017-02-07 2016-12-31 13F/A-1 ALLIANT COM 018802108 40,412 0 0.00 1,532 -1.10 0.2113
2017-02-02 2016-12-31 13F ALLIANT COM 018802108 40,412 1,532
2016-11-14 2016-09-30 13F ALLIANT COM 018802108 40,412 0 0.00 1,549 -3.43 0.2069
2016-08-12 2016-06-30 13F ALLIANT COM 018802108 40,412 19,810 96.16 1,604 4.84 0.2221
2016-05-09 2016-03-31 13F ALLIANT COM 018802108 20,602 283 1.39 1,530 20.57 0.3059
2016-02-08 2015-12-31 13F ALLIANT COM 018802108 20,319 289 1.44 1,269 8.37 0.2637
2015-11-02 2015-09-30 13F ALLIANT COM 018802108 20,030 0 0.00 1,171 1.30 0.2563
2015-08-11 2015-06-30 13F ALLIANT COM 018802108 20,030 -1,052 -4.99 1,156 -12.95 0.2396
2015-05-12 2015-03-31 13F ALLIANT COM 018802108 21,082 9 0.04 1,328 -5.14 0.2850
2015-02-10 2014-12-31 13F ALLIANT COM 018802108 21,073 8 0.04 1,400 19.97 0.3248
2014-11-14 2014-09-30 13F ALLIANT COM 018802108 21,065 -91 -0.43 1,167 -9.39 0.3043
2014-08-06 2014-06-30 13F ALLIANT ENERGY COM 018802108 21,156 -329 -1.53 1,288 5.49 0.3396
2014-05-14 2014-03-31 13F ALLIANT ENERGY COM 018802108 21,485 -375 -1.72 1,221 8.24 0.3568
2014-02-11 2013-12-31 13F ALLIANT ENERGY COM 018802108 21,860 17,082 357.51 1,128 375.95 0.3264
2013-11-14 2013-09-30 13F ALLIANT ENERGY COM 018802108 4,778 774 19.33 237 17.33 0.0719
2013-08-14 2013-06-30 13F ALLIANT ENERGY COM 018802108 4,004 4,004 202 0.0562
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.