Alliant Energy Corporation
US ˙ NasdaqGS ˙ US0188021085

SecurityLNT / Alliant Energy Corporation
InstitutionMorgan Stanley
Latest Disclosed Ownership3,351,175 shares
Latest Disclosed Value $ 240,480,432
Morgan Stanley reports 8.65% increase in ownership of LNT / Alliant Energy Corporation

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 3,351,175 shares of Alliant Energy Corporation (US:LNT) valued at $240,480,318 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 3,084,452 shares of Alliant Energy Corporation. This represents a change in shares of 8.65% during the quarter. The current value of the position is $237,229,678 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)
2026-05-15 2026-03-31 13F ALLIANT ENERGY COM 018802108 3,351,175 266,723 8.65 240,480 19.93 0.0145
2026-05-27 2025-12-31 13F/A-1 ALLIANT ENERGY COM 018802108 3,084,452 -67,106 -2.13 200,520 -5.61 0.0120
2026-02-13 2025-12-31 13F ALLIANT ENERGY COM 018802108 3,084,452 -67,106 200,520 0.0120
2026-05-27 2025-09-30 13F/A-1 ALLIANT ENERGY COM 018802108 3,151,558 -343,726 -9.83 212,447 0.51 0.0129
2025-11-14 2025-09-30 13F ALLIANT ENERGY COM 018802108 3,151,558 -343,726 212,447 0.0129
2025-08-15 2025-06-30 13F ALLIANT ENERGY COM 018802108 3,495,284 31,214 0.90 211,360 -5.18 0.0138
2025-05-15 2025-03-31 13F ALLIANT ENERGY COM 018802108 3,464,070 655,223 23.33 222,913 34.19 0.0159
2025-05-15 2024-12-31 13F/A-1 ALLIANT ENERGY COM 018802108 2,808,847 54,506 1.98 166,115 -0.63 0.0116
2025-02-14 2024-12-31 13F ALLIANT ENERGY COM 018802108 2,808,847 54,506 166,115 0.0116
2025-05-14 2024-09-30 13F/A-2 ALLIANT ENERGY COM 018802108 2,754,341 -120,665 -4.20 167,161 14.23 0.0121
2025-02-14 2024-09-30 13F/A-1 ALLIANT ENERGY COM 018802108 2,754,341 -120,665 167,161 0.0121
2024-11-14 2024-09-30 13F ALLIANT ENERGY COM 018802108 2,754,341 -120,665 167,161 0.0014
2025-05-14 2024-06-30 13F/A-2 ALLIANT ENERGY COM 018802108 2,875,006 -45,789 -1.57 146,338 -0.59 0.0113
2024-10-17 2024-06-30 13F/A-1 ALLIANT ENERGY COM 018802108 2,875,006 -45,789 146,338 0.0113
2024-08-14 2024-06-30 13F ALLIANT ENERGY COM 018802108 2,875,006 -45,789 146,338 0.0113
2024-10-17 2024-03-31 13F/A-2 ALLIANT ENERGY COM 018802108 2,920,795 17,294 0.60 147,208 -1.17 0.0118
2024-08-16 2024-03-31 13F/A-1 ALLIANT ENERGY COM 018802108 2,920,795 17,294 147,208 0.0118
2024-05-15 2024-03-31 13F ALLIANT ENERGY COM 018802108 2,920,795 17,294 147,208 0.0118
2024-08-16 2023-12-31 13F/A-1 ALLIANT ENERGY COM 018802108 2,903,501 48,939 1.71 148,950 7.70 0.0131
2024-02-13 2023-12-31 13F ALLIANT ENERGY COM 018802108 2,903,501 48,939 148,950 0.0131
2023-11-15 2023-09-30 13F ALLIANT ENERGY COM 018802108 2,854,562 186,739 7.00 138,304 -1.22 0.0141
2023-08-14 2023-06-30 13F ALLIANT ENERGY COM 018802108 2,667,823 78,697 3.04 140,007 1.26 0.0138
2023-05-15 2023-03-31 13F ALLIANT ENERGY COM 018802108 2,589,126 83,228 3.32 138,259 -0.07 0.0148
2023-02-14 2022-12-31 13F ALLIANT ENERGY COM 018802108 2,505,898 696,101 38.46 138,351 44.26 0.0157
2022-11-14 2022-09-30 13F ALLIANT ENERGY COM 018802108 1,809,797 -40,700 -2.20 95,900 -11.58 0.0131
2022-10-27 2022-06-30 13F/A-1 ALLIANT ENERGY COM 018802108 1,850,497 974,493 111.24 108,458 98.15 0.0141
2022-08-15 2022-06-30 13F ALLIANT ENERGY COM 018802108 1,850,497 974,493 108,458 0.0141
2022-10-27 2022-03-31 13F/A-1 ALLIANT ENERGY COM 018802108 876,004 -56,443 -6.05 54,734 -4.51 0.0074
2022-05-13 2022-03-31 13F ALLIANT ENERGY COM 018802108 876,004 -56,443 54,734 0.0074
2022-02-14 2021-12-31 13F ALLIANT ENERGY COM 018802108 932,447 -161,247 -14.74 57,317 -6.38 0.0071
2021-11-15 2021-09-30 13F ALLIANT ENERGY COM 018802108 1,093,694 -86,876 -7.36 61,225 -6.99 0.0082
2021-08-23 2021-06-30 13F/A-1 ALLIANT ENERGY COM 018802108 1,180,570 490,768 71.15 65,829 76.20 0.0087
2021-08-16 2021-06-30 13F ALLIANT ENERGY COM 018802108 1,180,570 490,768 65,829 0.0018
2021-05-17 2021-03-31 13F ALLIANT ENERGY COM 018802108 689,802 -166,209 -19.42 37,360 -15.30 0.0055
2021-02-16 2020-12-31 13F ALLIANT ENERGY COM 018802108 856,011 205,450 31.58 44,110 31.27 0.0068
2020-11-13 2020-09-30 13F ALLIANT ENERGY COM 018802108 650,561 236,301 57.04 33,602 69.54 0.0065
2020-08-14 2020-06-30 13F ALLIANT ENERGY COM 018802108 414,260 -34,580 -7.70 19,819 -8.56 0.0044
2020-05-26 2020-03-31 13F/A-1 ALLIANT ENERGY COM 018802108 448,840 -89,097 -16.56 21,674 -26.37 0.0059
2020-05-15 2020-03-31 13F ALLIANT ENERGY COM 018802108 448,840 -89,097 21,674 1,665.0150
2020-02-14 2019-12-31 13F ALLIANT ENERGY COM 018802108 537,937 31,533 6.23 29,436 7.78 0.0068
2019-11-14 2019-09-30 13F ALLIANT ENERGY COM 018802108 506,404 156,234 44.62 27,312 58.91 0.0072
2019-08-14 2019-06-30 13F ALLIANT ENERGY COM 018802108 350,170 -26,937 -7.14 17,187 -3.30 0.0046
2019-05-15 2019-03-31 13F ALLIANT ENERGY COM 018802108 377,107 -283,977 -42.96 17,773 -36.37 0.0050
2019-02-14 2018-12-31 13F ALLIANT ENERGY COM 018802108 661,084 43,875 7.11 27,931 6.31 0.0084
2019-04-23 2018-09-30 13F/A-2 ALLIANT ENERGY COM 018802108 617,209 -107,943 -14.89 26,274 -14.38 0.0066
2018-11-20 2018-09-30 13F/A-1 ALLIANT ENERGY COM 018802108 617,209 0 26,274 0.0066
2018-11-14 2018-09-30 13F ALLIANT ENERGY COM 018802108 617,209 -107,943 26,274
2019-04-23 2018-06-30 13F/A-1 ALLIANT ENERGY COM 018802108 725,152 120,889 20.01 30,688 24.29 0.0083
2018-08-14 2018-06-30 13F ALLIANT ENERGY COM 018802108 725,152 120,889 30,688
2019-04-23 2018-03-31 13F/A-1 ALLIANT ENERGY COM 018802108 604,263 -302,981 -33.40 24,691 -36.13 0.0069
2018-05-14 2018-03-31 13F ALLIANT ENERGY COM 018802108 604,263 -302,981 24,691
2019-04-23 2017-12-31 13F/A-1 ALLIANT ENERGY COM 018802108 907,244 371,203 69.25 38,658 73.49 0.0106
2018-02-14 2017-12-31 13F ALLIANT ENERGY COM 018802108 907,244 371,203 38,658
2017-11-14 2017-09-30 13F ALLIANT ENERGY COM 018802108 536,041 88,586 19.80 22,283 23.97 0.0067
2017-08-11 2017-06-30 13F ALLIANT ENERGY COM 018802108 447,455 -922,568 -67.34 17,975 -66.88 0.0054
2017-05-22 2017-03-31 13F/A-1 ALLIANT ENERGY COM 018802108 1,370,023 480,352 53.99 54,268 60.99 0.0167
2017-05-12 2017-03-31 13F ALLIANT ENERGY COM 018802108 1,370,023 54,268
2017-02-22 2016-12-31 13F/A-1 ALLIANT ENERGY COM 018802108 889,671 -416,939 -31.91 33,708 -32.66 0.0110
2017-02-13 2016-12-31 13F ALLIANT ENERGY COM 018802108 889,671 33,708
2016-11-10 2016-09-30 13F ALLIANT ENERGY COM 018802108 1,306,610 705,977 117.54 50,055 109.93 0.0171
2016-08-12 2016-06-30 13F ALLIANT ENERGY COM 018802108 600,633 330,359 122.23 23,844 18.77 0.0086
2016-05-12 2016-03-31 13F ALLIANT ENERGY COM 018802108 270,274 -20,838 -7.16 20,076 10.43 0.0077
2016-02-09 2015-12-31 13F ALLIANT ENERGY COM 018802108 291,112 -256,999 -46.89 18,180 -43.29 0.0066
2016-02-08 2015-09-30 13F/A-1 ALLIANT ENERGY COM 018802108 548,111 133,929 32.34 32,058 34.10 0.0118
2015-11-09 2015-09-30 13F ALLIANT ENERGY COM 018802108 548,111 32,058
2015-08-12 2015-06-30 13F ALLIANT ENERGY COM 018802108 414,182 -63,059 -13.21 23,906 -20.49 0.0083
2015-05-14 2015-03-31 13F ALLIANT ENERGY COM 018802108 477,241 220,585 85.95 30,066 76.37 0.0111
2015-02-13 2014-12-31 13F ALLIANT ENERGY COM 018802108 256,656 25,780 11.17 17,047 33.25 0.0062
2014-12-16 2014-09-30 13F/A-1 ALLIANT ENERGY COM 018802108 230,876 -11,958 -4.92 12,793 -13.44 0.0049
2014-11-14 2014-09-30 13F ALLIANT ENERGY COM 018802108 230,876 12,793
2014-08-12 2014-06-30 13F ALLIANT ENERGY COM 018802108 242,834 4,394 1.84 14,779 9.10 0.0253
2014-05-13 2014-03-31 13F ALLIANT ENERGY COM 018802108 238,440 -75,552 -24.06 13,546 -16.39 0.0057
2014-02-13 2013-12-31 13F ALLIANT ENERGY COM 018802108 313,992 -49,712 -13.67 16,202 -10.09 0.0069
2013-11-13 2013-09-30 13F ALLIANT ENERGY CORP COM ST COM 018802108 363,704 -64,143 -14.99 18,021 -16.46 0.0085
2013-08-08 2013-06-30 13F ALLIANT ENERGY CORP COM ST COM 018802108 427,847 427,847 21,572 0.0109
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.