Alliant Energy Corporation
US ˙ NasdaqGS ˙ US0188021085

SecurityLNT / Alliant Energy Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,383,646 shares
Latest Disclosed Value $ 99,287,352
Dimensional Fund Advisors Lp reports 3.32% increase in ownership of LNT / Alliant Energy Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 1,383,646 shares of Alliant Energy Corporation (US:LNT) valued at $99,290,437 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,339,172 shares of Alliant Energy Corporation. This represents a change in shares of 3.32% during the quarter. The current value of the position is $100,826,284 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 1,383,646 44,474 3.32 99,287 14.04 0.0206
2026-02-12 2025-12-31 13F ALLIANT ENERGY COM 018802108 1,339,172 -6,015 -0.45 87,065 -3.98 0.0183
2025-11-12 2025-09-30 13F ALLIANT ENERGY COM 018802108 1,345,187 14,792 1.11 90,671 12.71 0.0195
2025-08-12 2025-06-30 13F ALLIANT ENERGY COM 018802108 1,330,395 21,023 1.61 80,448 -4.51 0.0186
2025-05-13 2025-03-31 13F ALLIANT ENERGY COM 018802108 1,309,372 -42,230 -3.12 84,250 5.40 0.0209
2025-02-13 2024-12-31 13F ALLIANT ENERGY COM 018802108 1,351,602 -7,169 -0.53 79,936 -3.07 0.0192
2024-11-07 2024-09-30 13F ALLIANT ENERGY COM 018802108 1,358,771 64,805 5.01 82,464 25.20 0.0200
2024-08-09 2024-06-30 13F ALLIANT ENERGY COM 018802108 1,293,966 116,399 9.88 65,865 10.98 0.0172
2024-05-10 2024-03-31 13F ALLIANT ENERGY COM 018802108 1,177,567 277,929 30.89 59,349 28.60 0.0161
2024-02-07 2023-12-31 13F ALLIANT ENERGY COM 018802108 899,638 9,578 1.08 46,152 7.03 0.0135
2023-11-09 2023-09-30 13F ALLIANT ENERGY COM 018802108 890,060 29,566 3.44 43,121 -4.50 0.0141
2023-08-09 2023-06-30 13F ALLIANT ENERGY COM 018802108 860,494 20,098 2.39 45,155 0.63 0.0144
2023-05-12 2023-03-31 13F ALLIANT ENERGY COM 018802108 840,396 3,090 0.37 44,874 97,450.00 0.0151
2023-02-09 2022-12-31 13F ALLIANT ENERGY COM 018802108 837,306 -4,168 -0.50 46 -99.90 0.0137
2022-11-10 2022-09-30 13F ALLIANT ENERGY COM 018802108 841,474 14,305 1.73 44,600 -7.99 0.0171
2022-08-12 2022-06-30 13F ALLIANT ENERGY COM 018802108 827,169 11,256 1.38 48,474 -4.92 0.0174
2022-05-13 2022-03-31 13F ALLIANT ENERGY COM 018802108 815,913 -13,163 -1.59 50,981 0.04 0.0157
2022-02-09 2021-12-31 13F ALLIANT ENERGY COM 018802108 829,076 -11,537 -1.37 50,963 8.29 0.0154
2021-11-12 2021-09-30 13F ALLIANT ENERGY COM 018802108 840,613 -8,972 -1.06 47,063 -0.65 0.0152
2021-08-12 2021-06-30 13F ALLIANT ENERGY COM 018802108 849,585 5,363 0.64 47,372 3.61 0.0150
2021-05-14 2021-03-31 13F ALLIANT ENERGY COM 018802108 844,222 -3,542 -0.42 45,723 4.68 0.0151
2021-03-08 2020-12-31 13F/A-2 ALLIANT ENERGY COM 018802108 847,764 45,238 5.64 43,680 5.39 0.0158
2021-02-11 2020-12-31 13F ALLIANT ENERGY COM 018802108 847,764 45,238 43,680 15,774.8943
2020-11-12 2020-09-30 13F ALLIANT ENERGY COM 018802108 802,526 9,694 1.22 41,445 9.28 0.0176
2020-08-13 2020-06-30 13F ALLIANT ENERGY COM 018802108 792,832 7,550 0.96 37,925 -0.04 0.0167
2020-05-14 2020-03-31 13F ALLIANT ENERGY COM 018802108 785,282 10,448 1.35 37,941 -10.51 0.0198
2020-02-14 2019-12-31 13F ALLIANT ENERGY COM 018802108 774,834 789 0.10 42,396 1.56 0.0155
2019-11-12 2019-09-30 13F ALLIANT ENERGY COM 018802108 774,045 33,602 4.54 41,745 14.87 0.0162
2019-08-13 2019-06-30 13F ALLIANT ENERGY COM 018802108 740,443 21,262 2.96 36,340 7.22 0.0141
2019-08-12 2019-03-31 13F/A-2 ALLIANT ENERGY COM 018802108 719,181 22,789 3.27 33,893 15.20 0.0135
2019-05-10 2019-03-31 13F ALLIANT ENERGY COM 018802108 719,181 22,789 33,893
2019-02-26 2018-12-31 13F/A-1 ALLIANT ENERGY COM 018802108 696,392 39,358 5.99 29,421 5.21 0.0133
2019-02-13 2018-12-31 13F ALLIANT ENERGY COM 018802108 696,392 39,358 29,421
2018-11-13 2018-09-30 13F ALLIANT ENERGY COM 018802108 657,034 41,001 6.66 27,965 7.26 0.0106
2018-08-10 2018-06-30 13F ALLIANT ENERGY COM 018802108 616,033 6,778 1.11 26,071 4.73 0.0104
2018-05-11 2018-03-31 13F ALLIANT ENERGY COM 018802108 609,255 50,758 9.09 24,894 4.61 0.0104
2018-02-12 2017-12-31 13F ALLIANT ENERGY COM 018802108 558,497 6,311 1.14 23,798 3.67 0.0099
2017-11-13 2017-09-30 13F ALLIANT ENERGY COM 018802108 552,186 6,274 1.15 22,955 4.67 0.0100
2017-08-11 2017-06-30 13F ALLIANT ENERGY COM 018802108 545,912 8,609 1.60 21,931 3.05 0.0101
2017-05-12 2017-03-31 13F ALLIANT ENERGY COM 018802108 537,303 11,079 2.11 21,282 6.73 0.0102
2017-02-09 2016-12-31 13F ALLIANT ENERGY COM 018802108 526,224 7,720 1.49 19,940 0.37 0.0100
2016-11-10 2016-09-30 13F ALLIANT ENERGY COM 018802108 518,504 100,603 24.07 19,867 19.75 0.0107
2016-08-09 2016-06-30 13F ALLIANT ENERGY COM 018802108 417,901 209,297 100.33 16,591 7.08 0.0095
2016-05-13 2016-03-31 13F ALLIANT ENERGY COM 018802108 208,604 2,330 1.13 15,494 20.26 0.0093
2016-02-10 2015-12-31 13F ALLIANT ENERGY COM 018802108 206,274 15,214 7.96 12,884 15.30 0.0080
2015-11-13 2015-09-30 13F ALLIANT ENERGY COM 018802108 191,060 14,895 8.46 11,174 9.89 0.0073
2015-08-14 2015-06-30 13F ALLIANT ENERGY COM 018802108 176,165 27,192 18.25 10,168 8.35 0.0062
2015-05-14 2015-03-31 13F ALLIANT ENERGY COM 018802108 148,973 9,774 7.02 9,384 1.46 0.0059
2015-02-06 2014-12-31 13F ALLIANT ENERGY COM 018802108 139,199 1,946 1.42 9,249 21.62 0.0061
2014-11-13 2014-09-30 13F ALLIANT ENERGY COM 018802108 137,253 978 0.72 7,605 -8.27 0.0054
2014-08-08 2014-06-30 13F ALLIANT ENERGY COM 018802108 136,275 977 0.72 8,291 7.91 0.0058
2014-05-14 2014-03-31 13F ALLIANT ENERGY COM 018802108 135,298 8,648 6.83 7,683 17.57 0.0057
2014-02-12 2013-12-31 13F ALLIANT ENERGY COM 018802108 126,650 1,038 0.83 6,535 5.00 0.0051
2013-11-13 2013-09-30 13F ALLIANT ENERGY COM 018802108 125,612 5,080 4.21 6,224 2.44 0.0054
2013-08-15 2013-06-30 13F ALLIANT ENERGY COM 018802108 120,532 120,532 6,076 0.0057
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.